| /* Definitions of target machine for GNU compiler, for ARM. |
| Copyright (C) 1991-2014 Free Software Foundation, Inc. |
| Contributed by Pieter `Tiggr' Schoenmakers (rcpieter@win.tue.nl) |
| and Martin Simmons (@harleqn.co.uk). |
| More major hacks by Richard Earnshaw (rearnsha@arm.com) |
| Minor hacks by Nick Clifton (nickc@cygnus.com) |
| |
| This file is part of GCC. |
| |
| GCC is free software; you can redistribute it and/or modify it |
| under the terms of the GNU General Public License as published |
| by the Free Software Foundation; either version 3, or (at your |
| option) any later version. |
| |
| GCC is distributed in the hope that it will be useful, but WITHOUT |
| ANY WARRANTY; without even the implied warranty of MERCHANTABILITY |
| or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public |
| License for more details. |
| |
| Under Section 7 of GPL version 3, you are granted additional |
| permissions described in the GCC Runtime Library Exception, version |
| 3.1, as published by the Free Software Foundation. |
| |
| You should have received a copy of the GNU General Public License and |
| a copy of the GCC Runtime Library Exception along with this program; |
| see the files COPYING3 and COPYING.RUNTIME respectively. If not, see |
| <http://www.gnu.org/licenses/>. */ |
| |
| #ifndef GCC_ARM_H |
| #define GCC_ARM_H |
| |
| /* We can't use enum machine_mode inside a generator file because it |
| hasn't been created yet; we shouldn't be using any code that |
| needs the real definition though, so this ought to be safe. */ |
| #ifdef GENERATOR_FILE |
| #define MACHMODE int |
| #else |
| #include "insn-modes.h" |
| #define MACHMODE enum machine_mode |
| #endif |
| |
| #include "config/vxworks-dummy.h" |
| |
| /* The architecture define. */ |
| extern char arm_arch_name[]; |
| |
| /* Target CPU builtins. */ |
| #define TARGET_CPU_CPP_BUILTINS() \ |
| do \ |
| { \ |
| if (TARGET_DSP_MULTIPLY) \ |
| builtin_define ("__ARM_FEATURE_DSP"); \ |
| if (TARGET_ARM_QBIT) \ |
| builtin_define ("__ARM_FEATURE_QBIT"); \ |
| if (TARGET_ARM_SAT) \ |
| builtin_define ("__ARM_FEATURE_SAT"); \ |
| if (TARGET_CRYPTO) \ |
| builtin_define ("__ARM_FEATURE_CRYPTO"); \ |
| if (unaligned_access) \ |
| builtin_define ("__ARM_FEATURE_UNALIGNED"); \ |
| if (TARGET_CRC32) \ |
| builtin_define ("__ARM_FEATURE_CRC32"); \ |
| if (TARGET_32BIT) \ |
| builtin_define ("__ARM_32BIT_STATE"); \ |
| if (TARGET_ARM_FEATURE_LDREX) \ |
| builtin_define_with_int_value ( \ |
| "__ARM_FEATURE_LDREX", TARGET_ARM_FEATURE_LDREX); \ |
| if ((TARGET_ARM_ARCH >= 5 && !TARGET_THUMB) \ |
| || TARGET_ARM_ARCH_ISA_THUMB >=2) \ |
| builtin_define ("__ARM_FEATURE_CLZ"); \ |
| if (TARGET_INT_SIMD) \ |
| builtin_define ("__ARM_FEATURE_SIMD32"); \ |
| \ |
| builtin_define_with_int_value ( \ |
| "__ARM_SIZEOF_MINIMAL_ENUM", \ |
| flag_short_enums ? 1 : 4); \ |
| builtin_define_with_int_value ( \ |
| "__ARM_SIZEOF_WCHAR_T", WCHAR_TYPE_SIZE); \ |
| if (TARGET_ARM_ARCH_PROFILE) \ |
| builtin_define_with_int_value ( \ |
| "__ARM_ARCH_PROFILE", TARGET_ARM_ARCH_PROFILE); \ |
| \ |
| /* Define __arm__ even when in thumb mode, for \ |
| consistency with armcc. */ \ |
| builtin_define ("__arm__"); \ |
| if (TARGET_ARM_ARCH) \ |
| builtin_define_with_int_value ( \ |
| "__ARM_ARCH", TARGET_ARM_ARCH); \ |
| if (arm_arch_notm) \ |
| builtin_define ("__ARM_ARCH_ISA_ARM"); \ |
| builtin_define ("__APCS_32__"); \ |
| if (TARGET_THUMB) \ |
| builtin_define ("__thumb__"); \ |
| if (TARGET_THUMB2) \ |
| builtin_define ("__thumb2__"); \ |
| if (TARGET_ARM_ARCH_ISA_THUMB) \ |
| builtin_define_with_int_value ( \ |
| "__ARM_ARCH_ISA_THUMB", \ |
| TARGET_ARM_ARCH_ISA_THUMB); \ |
| \ |
| if (TARGET_BIG_END) \ |
| { \ |
| builtin_define ("__ARMEB__"); \ |
| builtin_define ("__ARM_BIG_ENDIAN"); \ |
| if (TARGET_THUMB) \ |
| builtin_define ("__THUMBEB__"); \ |
| if (TARGET_LITTLE_WORDS) \ |
| builtin_define ("__ARMWEL__"); \ |
| } \ |
| else \ |
| { \ |
| builtin_define ("__ARMEL__"); \ |
| if (TARGET_THUMB) \ |
| builtin_define ("__THUMBEL__"); \ |
| } \ |
| \ |
| if (TARGET_SOFT_FLOAT) \ |
| builtin_define ("__SOFTFP__"); \ |
| \ |
| if (TARGET_VFP) \ |
| builtin_define ("__VFP_FP__"); \ |
| \ |
| if (TARGET_ARM_FP) \ |
| builtin_define_with_int_value ( \ |
| "__ARM_FP", TARGET_ARM_FP); \ |
| if (arm_fp16_format == ARM_FP16_FORMAT_IEEE) \ |
| builtin_define ("__ARM_FP16_FORMAT_IEEE"); \ |
| if (arm_fp16_format == ARM_FP16_FORMAT_ALTERNATIVE) \ |
| builtin_define ("__ARM_FP16_FORMAT_ALTERNATIVE"); \ |
| if (TARGET_FMA) \ |
| builtin_define ("__ARM_FEATURE_FMA"); \ |
| \ |
| if (TARGET_NEON) \ |
| { \ |
| builtin_define ("__ARM_NEON__"); \ |
| builtin_define ("__ARM_NEON"); \ |
| } \ |
| if (TARGET_NEON_FP) \ |
| builtin_define_with_int_value ( \ |
| "__ARM_NEON_FP", TARGET_NEON_FP); \ |
| \ |
| /* Add a define for interworking. \ |
| Needed when building libgcc.a. */ \ |
| if (arm_cpp_interwork) \ |
| builtin_define ("__THUMB_INTERWORK__"); \ |
| \ |
| builtin_assert ("cpu=arm"); \ |
| builtin_assert ("machine=arm"); \ |
| \ |
| builtin_define (arm_arch_name); \ |
| if (arm_arch_xscale) \ |
| builtin_define ("__XSCALE__"); \ |
| if (arm_arch_iwmmxt) \ |
| { \ |
| builtin_define ("__IWMMXT__"); \ |
| builtin_define ("__ARM_WMMX"); \ |
| } \ |
| if (arm_arch_iwmmxt2) \ |
| builtin_define ("__IWMMXT2__"); \ |
| if (TARGET_AAPCS_BASED) \ |
| { \ |
| if (arm_pcs_default == ARM_PCS_AAPCS_VFP) \ |
| builtin_define ("__ARM_PCS_VFP"); \ |
| else if (arm_pcs_default == ARM_PCS_AAPCS) \ |
| builtin_define ("__ARM_PCS"); \ |
| builtin_define ("__ARM_EABI__"); \ |
| } \ |
| if (TARGET_IDIV) \ |
| builtin_define ("__ARM_ARCH_EXT_IDIV__"); \ |
| } while (0) |
| |
| #include "config/arm/arm-opts.h" |
| |
| enum target_cpus |
| { |
| #define ARM_CORE(NAME, INTERNAL_IDENT, IDENT, ARCH, FLAGS, COSTS) \ |
| TARGET_CPU_##INTERNAL_IDENT, |
| #include "arm-cores.def" |
| #undef ARM_CORE |
| TARGET_CPU_generic |
| }; |
| |
| /* The processor for which instructions should be scheduled. */ |
| extern enum processor_type arm_tune; |
| |
| typedef enum arm_cond_code |
| { |
| ARM_EQ = 0, ARM_NE, ARM_CS, ARM_CC, ARM_MI, ARM_PL, ARM_VS, ARM_VC, |
| ARM_HI, ARM_LS, ARM_GE, ARM_LT, ARM_GT, ARM_LE, ARM_AL, ARM_NV |
| } |
| arm_cc; |
| |
| extern arm_cc arm_current_cc; |
| |
| #define ARM_INVERSE_CONDITION_CODE(X) ((arm_cc) (((int)X) ^ 1)) |
| |
| /* The maximum number of instructions that is beneficial to |
| conditionally execute. */ |
| #undef MAX_CONDITIONAL_EXECUTE |
| #define MAX_CONDITIONAL_EXECUTE arm_max_conditional_execute () |
| |
| extern int arm_target_label; |
| extern int arm_ccfsm_state; |
| extern GTY(()) rtx arm_target_insn; |
| /* The label of the current constant pool. */ |
| extern rtx pool_vector_label; |
| /* Set to 1 when a return insn is output, this means that the epilogue |
| is not needed. */ |
| extern int return_used_this_function; |
| /* Callback to output language specific object attributes. */ |
| extern void (*arm_lang_output_object_attributes_hook)(void); |
| |
| /* Just in case configure has failed to define anything. */ |
| #ifndef TARGET_CPU_DEFAULT |
| #define TARGET_CPU_DEFAULT TARGET_CPU_generic |
| #endif |
| |
| |
| #undef CPP_SPEC |
| #define CPP_SPEC "%(subtarget_cpp_spec) \ |
| %{mfloat-abi=soft:%{mfloat-abi=hard: \ |
| %e-mfloat-abi=soft and -mfloat-abi=hard may not be used together}} \ |
| %{mbig-endian:%{mlittle-endian: \ |
| %e-mbig-endian and -mlittle-endian may not be used together}}" |
| |
| #ifndef CC1_SPEC |
| #define CC1_SPEC "" |
| #endif |
| |
| /* This macro defines names of additional specifications to put in the specs |
| that can be used in various specifications like CC1_SPEC. Its definition |
| is an initializer with a subgrouping for each command option. |
| |
| Each subgrouping contains a string constant, that defines the |
| specification name, and a string constant that used by the GCC driver |
| program. |
| |
| Do not define this macro if it does not need to do anything. */ |
| #define EXTRA_SPECS \ |
| { "subtarget_cpp_spec", SUBTARGET_CPP_SPEC }, \ |
| { "asm_cpu_spec", ASM_CPU_SPEC }, \ |
| SUBTARGET_EXTRA_SPECS |
| |
| #ifndef SUBTARGET_EXTRA_SPECS |
| #define SUBTARGET_EXTRA_SPECS |
| #endif |
| |
| #ifndef SUBTARGET_CPP_SPEC |
| #define SUBTARGET_CPP_SPEC "" |
| #endif |
| |
| /* Run-time Target Specification. */ |
| #define TARGET_SOFT_FLOAT (arm_float_abi == ARM_FLOAT_ABI_SOFT) |
| /* Use hardware floating point instructions. */ |
| #define TARGET_HARD_FLOAT (arm_float_abi != ARM_FLOAT_ABI_SOFT) |
| /* Use hardware floating point calling convention. */ |
| #define TARGET_HARD_FLOAT_ABI (arm_float_abi == ARM_FLOAT_ABI_HARD) |
| #define TARGET_VFP (arm_fpu_desc->model == ARM_FP_MODEL_VFP) |
| #define TARGET_IWMMXT (arm_arch_iwmmxt) |
| #define TARGET_IWMMXT2 (arm_arch_iwmmxt2) |
| #define TARGET_REALLY_IWMMXT (TARGET_IWMMXT && TARGET_32BIT) |
| #define TARGET_REALLY_IWMMXT2 (TARGET_IWMMXT2 && TARGET_32BIT) |
| #define TARGET_IWMMXT_ABI (TARGET_32BIT && arm_abi == ARM_ABI_IWMMXT) |
| #define TARGET_ARM (! TARGET_THUMB) |
| #define TARGET_EITHER 1 /* (TARGET_ARM | TARGET_THUMB) */ |
| #define TARGET_BACKTRACE (leaf_function_p () \ |
| ? TARGET_TPCS_LEAF_FRAME \ |
| : TARGET_TPCS_FRAME) |
| #define TARGET_AAPCS_BASED \ |
| (arm_abi != ARM_ABI_APCS && arm_abi != ARM_ABI_ATPCS) |
| |
| #define TARGET_HARD_TP (target_thread_pointer == TP_CP15) |
| #define TARGET_SOFT_TP (target_thread_pointer == TP_SOFT) |
| #define TARGET_GNU2_TLS (target_tls_dialect == TLS_GNU2) |
| |
| /* Only 16-bit thumb code. */ |
| #define TARGET_THUMB1 (TARGET_THUMB && !arm_arch_thumb2) |
| /* Arm or Thumb-2 32-bit code. */ |
| #define TARGET_32BIT (TARGET_ARM || arm_arch_thumb2) |
| /* 32-bit Thumb-2 code. */ |
| #define TARGET_THUMB2 (TARGET_THUMB && arm_arch_thumb2) |
| /* Thumb-1 only. */ |
| #define TARGET_THUMB1_ONLY (TARGET_THUMB1 && !arm_arch_notm) |
| |
| #define TARGET_LDRD (arm_arch5e && ARM_DOUBLEWORD_ALIGN \ |
| && !TARGET_THUMB1) |
| |
| #define TARGET_CRC32 (arm_arch_crc) |
| |
| /* The following two macros concern the ability to execute coprocessor |
| instructions for VFPv3 or NEON. TARGET_VFP3/TARGET_VFPD32 are currently |
| only ever tested when we know we are generating for VFP hardware; we need |
| to be more careful with TARGET_NEON as noted below. */ |
| |
| /* FPU is has the full VFPv3/NEON register file of 32 D registers. */ |
| #define TARGET_VFPD32 (TARGET_VFP && arm_fpu_desc->regs == VFP_REG_D32) |
| |
| /* FPU supports VFPv3 instructions. */ |
| #define TARGET_VFP3 (TARGET_VFP && arm_fpu_desc->rev >= 3) |
| |
| /* FPU only supports VFP single-precision instructions. */ |
| #define TARGET_VFP_SINGLE (TARGET_VFP && arm_fpu_desc->regs == VFP_REG_SINGLE) |
| |
| /* FPU supports VFP double-precision instructions. */ |
| #define TARGET_VFP_DOUBLE (TARGET_VFP && arm_fpu_desc->regs != VFP_REG_SINGLE) |
| |
| /* FPU supports half-precision floating-point with NEON element load/store. */ |
| #define TARGET_NEON_FP16 \ |
| (TARGET_VFP && arm_fpu_desc->neon && arm_fpu_desc->fp16) |
| |
| /* FPU supports VFP half-precision floating-point. */ |
| #define TARGET_FP16 (TARGET_VFP && arm_fpu_desc->fp16) |
| |
| /* FPU supports fused-multiply-add operations. */ |
| #define TARGET_FMA (TARGET_VFP && arm_fpu_desc->rev >= 4) |
| |
| /* FPU is ARMv8 compatible. */ |
| #define TARGET_FPU_ARMV8 (TARGET_VFP && arm_fpu_desc->rev >= 8) |
| |
| /* FPU supports Crypto extensions. */ |
| #define TARGET_CRYPTO (TARGET_VFP && arm_fpu_desc->crypto) |
| |
| /* FPU supports Neon instructions. The setting of this macro gets |
| revealed via __ARM_NEON__ so we add extra guards upon TARGET_32BIT |
| and TARGET_HARD_FLOAT to ensure that NEON instructions are |
| available. */ |
| #define TARGET_NEON (TARGET_32BIT && TARGET_HARD_FLOAT \ |
| && TARGET_VFP && arm_fpu_desc->neon) |
| |
| /* Q-bit is present. */ |
| #define TARGET_ARM_QBIT \ |
| (TARGET_32BIT && arm_arch5e && (arm_arch_notm || arm_arch7)) |
| /* Saturation operation, e.g. SSAT. */ |
| #define TARGET_ARM_SAT \ |
| (TARGET_32BIT && arm_arch6 && (arm_arch_notm || arm_arch7)) |
| /* "DSP" multiply instructions, eg. SMULxy. */ |
| #define TARGET_DSP_MULTIPLY \ |
| (TARGET_32BIT && arm_arch5e && (arm_arch_notm || arm_arch7em)) |
| /* Integer SIMD instructions, and extend-accumulate instructions. */ |
| #define TARGET_INT_SIMD \ |
| (TARGET_32BIT && arm_arch6 && (arm_arch_notm || arm_arch7em)) |
| |
| /* Should MOVW/MOVT be used in preference to a constant pool. */ |
| #define TARGET_USE_MOVT \ |
| (arm_arch_thumb2 \ |
| && (arm_disable_literal_pool \ |
| || (!optimize_size && !current_tune->prefer_constant_pool))) |
| |
| /* We could use unified syntax for arm mode, but for now we just use it |
| for Thumb-2. */ |
| #define TARGET_UNIFIED_ASM TARGET_THUMB2 |
| |
| /* Nonzero if this chip provides the DMB instruction. */ |
| #define TARGET_HAVE_DMB (arm_arch6m || arm_arch7) |
| |
| /* Nonzero if this chip implements a memory barrier via CP15. */ |
| #define TARGET_HAVE_DMB_MCR (arm_arch6 && ! TARGET_HAVE_DMB \ |
| && ! TARGET_THUMB1) |
| |
| /* Nonzero if this chip implements a memory barrier instruction. */ |
| #define TARGET_HAVE_MEMORY_BARRIER (TARGET_HAVE_DMB || TARGET_HAVE_DMB_MCR) |
| |
| /* Nonzero if this chip supports ldrex and strex */ |
| #define TARGET_HAVE_LDREX ((arm_arch6 && TARGET_ARM) || arm_arch7) |
| |
| /* Nonzero if this chip supports ldrex{bh} and strex{bh}. */ |
| #define TARGET_HAVE_LDREXBH ((arm_arch6k && TARGET_ARM) || arm_arch7) |
| |
| /* Nonzero if this chip supports ldrexd and strexd. */ |
| #define TARGET_HAVE_LDREXD (((arm_arch6k && TARGET_ARM) || arm_arch7) \ |
| && arm_arch_notm) |
| |
| /* Nonzero if this chip supports load-acquire and store-release. */ |
| #define TARGET_HAVE_LDACQ (TARGET_ARM_ARCH >= 8) |
| |
| /* Nonzero if integer division instructions supported. */ |
| #define TARGET_IDIV ((TARGET_ARM && arm_arch_arm_hwdiv) \ |
| || (TARGET_THUMB2 && arm_arch_thumb_hwdiv)) |
| |
| /* Should NEON be used for 64-bits bitops. */ |
| #define TARGET_PREFER_NEON_64BITS (prefer_neon_for_64bits) |
| |
| /* True iff the full BPABI is being used. If TARGET_BPABI is true, |
| then TARGET_AAPCS_BASED must be true -- but the converse does not |
| hold. TARGET_BPABI implies the use of the BPABI runtime library, |
| etc., in addition to just the AAPCS calling conventions. */ |
| #ifndef TARGET_BPABI |
| #define TARGET_BPABI false |
| #endif |
| |
| /* Support for a compile-time default CPU, et cetera. The rules are: |
| --with-arch is ignored if -march or -mcpu are specified. |
| --with-cpu is ignored if -march or -mcpu are specified, and is overridden |
| by --with-arch. |
| --with-tune is ignored if -mtune or -mcpu are specified (but not affected |
| by -march). |
| --with-float is ignored if -mfloat-abi is specified. |
| --with-fpu is ignored if -mfpu is specified. |
| --with-abi is ignored if -mabi is specified. |
| --with-tls is ignored if -mtls-dialect is specified. */ |
| #define OPTION_DEFAULT_SPECS \ |
| {"arch", "%{!march=*:%{!mcpu=*:-march=%(VALUE)}}" }, \ |
| {"cpu", "%{!march=*:%{!mcpu=*:-mcpu=%(VALUE)}}" }, \ |
| {"tune", "%{!mcpu=*:%{!mtune=*:-mtune=%(VALUE)}}" }, \ |
| {"float", "%{!mfloat-abi=*:-mfloat-abi=%(VALUE)}" }, \ |
| {"fpu", "%{!mfpu=*:-mfpu=%(VALUE)}"}, \ |
| {"abi", "%{!mabi=*:-mabi=%(VALUE)}"}, \ |
| {"mode", "%{!marm:%{!mthumb:-m%(VALUE)}}"}, \ |
| {"tls", "%{!mtls-dialect=*:-mtls-dialect=%(VALUE)}"}, |
| |
| /* Which floating point model to use. */ |
| enum arm_fp_model |
| { |
| ARM_FP_MODEL_UNKNOWN, |
| /* VFP floating point model. */ |
| ARM_FP_MODEL_VFP |
| }; |
| |
| enum vfp_reg_type |
| { |
| VFP_NONE = 0, |
| VFP_REG_D16, |
| VFP_REG_D32, |
| VFP_REG_SINGLE |
| }; |
| |
| extern const struct arm_fpu_desc |
| { |
| const char *name; |
| enum arm_fp_model model; |
| int rev; |
| enum vfp_reg_type regs; |
| int neon; |
| int fp16; |
| int crypto; |
| } *arm_fpu_desc; |
| |
| /* Which floating point hardware to schedule for. */ |
| extern int arm_fpu_attr; |
| |
| #ifndef TARGET_DEFAULT_FLOAT_ABI |
| #define TARGET_DEFAULT_FLOAT_ABI ARM_FLOAT_ABI_SOFT |
| #endif |
| |
| #define LARGEST_EXPONENT_IS_NORMAL(bits) \ |
| ((bits) == 16 && arm_fp16_format == ARM_FP16_FORMAT_ALTERNATIVE) |
| |
| #ifndef ARM_DEFAULT_ABI |
| #define ARM_DEFAULT_ABI ARM_ABI_APCS |
| #endif |
| |
| /* Map each of the micro-architecture variants to their corresponding |
| major architecture revision. */ |
| |
| enum base_architecture |
| { |
| BASE_ARCH_0 = 0, |
| BASE_ARCH_2 = 2, |
| BASE_ARCH_3 = 3, |
| BASE_ARCH_3M = 3, |
| BASE_ARCH_4 = 4, |
| BASE_ARCH_4T = 4, |
| BASE_ARCH_5 = 5, |
| BASE_ARCH_5E = 5, |
| BASE_ARCH_5T = 5, |
| BASE_ARCH_5TE = 5, |
| BASE_ARCH_5TEJ = 5, |
| BASE_ARCH_6 = 6, |
| BASE_ARCH_6J = 6, |
| BASE_ARCH_6ZK = 6, |
| BASE_ARCH_6K = 6, |
| BASE_ARCH_6T2 = 6, |
| BASE_ARCH_6M = 6, |
| BASE_ARCH_6Z = 6, |
| BASE_ARCH_7 = 7, |
| BASE_ARCH_7A = 7, |
| BASE_ARCH_7R = 7, |
| BASE_ARCH_7M = 7, |
| BASE_ARCH_7EM = 7, |
| BASE_ARCH_8A = 8 |
| }; |
| |
| /* The major revision number of the ARM Architecture implemented by the target. */ |
| extern enum base_architecture arm_base_arch; |
| |
| /* Nonzero if this chip supports the ARM Architecture 3M extensions. */ |
| extern int arm_arch3m; |
| |
| /* Nonzero if this chip supports the ARM Architecture 4 extensions. */ |
| extern int arm_arch4; |
| |
| /* Nonzero if this chip supports the ARM Architecture 4T extensions. */ |
| extern int arm_arch4t; |
| |
| /* Nonzero if this chip supports the ARM Architecture 5 extensions. */ |
| extern int arm_arch5; |
| |
| /* Nonzero if this chip supports the ARM Architecture 5E extensions. */ |
| extern int arm_arch5e; |
| |
| /* Nonzero if this chip supports the ARM Architecture 6 extensions. */ |
| extern int arm_arch6; |
| |
| /* Nonzero if this chip supports the ARM Architecture 6k extensions. */ |
| extern int arm_arch6k; |
| |
| /* Nonzero if instructions present in ARMv6-M can be used. */ |
| extern int arm_arch6m; |
| |
| /* Nonzero if this chip supports the ARM Architecture 7 extensions. */ |
| extern int arm_arch7; |
| |
| /* Nonzero if instructions not present in the 'M' profile can be used. */ |
| extern int arm_arch_notm; |
| |
| /* Nonzero if instructions present in ARMv7E-M can be used. */ |
| extern int arm_arch7em; |
| |
| /* Nonzero if this chip supports the ARM Architecture 8 extensions. */ |
| extern int arm_arch8; |
| |
| /* Nonzero if this chip can benefit from load scheduling. */ |
| extern int arm_ld_sched; |
| |
| /* Nonzero if generating Thumb code, either Thumb-1 or Thumb-2. */ |
| extern int thumb_code; |
| |
| /* Nonzero if generating Thumb-1 code. */ |
| extern int thumb1_code; |
| |
| /* Nonzero if this chip is a StrongARM. */ |
| extern int arm_tune_strongarm; |
| |
| /* Nonzero if this chip supports Intel XScale with Wireless MMX technology. */ |
| extern int arm_arch_iwmmxt; |
| |
| /* Nonzero if this chip supports Intel Wireless MMX2 technology. */ |
| extern int arm_arch_iwmmxt2; |
| |
| /* Nonzero if this chip is an XScale. */ |
| extern int arm_arch_xscale; |
| |
| /* Nonzero if tuning for XScale. */ |
| extern int arm_tune_xscale; |
| |
| /* Nonzero if tuning for stores via the write buffer. */ |
| extern int arm_tune_wbuf; |
| |
| /* Nonzero if tuning for Cortex-A9. */ |
| extern int arm_tune_cortex_a9; |
| |
| /* Nonzero if we should define __THUMB_INTERWORK__ in the |
| preprocessor. |
| XXX This is a bit of a hack, it's intended to help work around |
| problems in GLD which doesn't understand that armv5t code is |
| interworking clean. */ |
| extern int arm_cpp_interwork; |
| |
| /* Nonzero if chip supports Thumb 2. */ |
| extern int arm_arch_thumb2; |
| |
| /* Nonzero if chip supports integer division instruction in ARM mode. */ |
| extern int arm_arch_arm_hwdiv; |
| |
| /* Nonzero if chip supports integer division instruction in Thumb mode. */ |
| extern int arm_arch_thumb_hwdiv; |
| |
| /* Nonzero if we should use Neon to handle 64-bits operations rather |
| than core registers. */ |
| extern int prefer_neon_for_64bits; |
| |
| /* Nonzero if we shouldn't use literal pools. */ |
| #ifndef USED_FOR_TARGET |
| extern bool arm_disable_literal_pool; |
| #endif |
| |
| /* Nonzero if chip supports the ARMv8 CRC instructions. */ |
| extern int arm_arch_crc; |
| |
| #ifndef TARGET_DEFAULT |
| #define TARGET_DEFAULT (MASK_APCS_FRAME) |
| #endif |
| |
| /* Nonzero if PIC code requires explicit qualifiers to generate |
| PLT and GOT relocs rather than the assembler doing so implicitly. |
| Subtargets can override these if required. */ |
| #ifndef NEED_GOT_RELOC |
| #define NEED_GOT_RELOC 0 |
| #endif |
| #ifndef NEED_PLT_RELOC |
| #define NEED_PLT_RELOC 0 |
| #endif |
| |
| #ifndef TARGET_DEFAULT_PIC_DATA_IS_TEXT_RELATIVE |
| #define TARGET_DEFAULT_PIC_DATA_IS_TEXT_RELATIVE 1 |
| #endif |
| |
| /* Nonzero if we need to refer to the GOT with a PC-relative |
| offset. In other words, generate |
| |
| .word _GLOBAL_OFFSET_TABLE_ - [. - (.Lxx + 8)] |
| |
| rather than |
| |
| .word _GLOBAL_OFFSET_TABLE_ - (.Lxx + 8) |
| |
| The default is true, which matches NetBSD. Subtargets can |
| override this if required. */ |
| #ifndef GOT_PCREL |
| #define GOT_PCREL 1 |
| #endif |
| |
| /* Target machine storage Layout. */ |
| |
| |
| /* Define this macro if it is advisable to hold scalars in registers |
| in a wider mode than that declared by the program. In such cases, |
| the value is constrained to be within the bounds of the declared |
| type, but kept valid in the wider mode. The signedness of the |
| extension may differ from that of the type. */ |
| |
| /* It is far faster to zero extend chars than to sign extend them */ |
| |
| #define PROMOTE_MODE(MODE, UNSIGNEDP, TYPE) \ |
| if (GET_MODE_CLASS (MODE) == MODE_INT \ |
| && GET_MODE_SIZE (MODE) < 4) \ |
| { \ |
| if (MODE == QImode) \ |
| UNSIGNEDP = 1; \ |
| else if (MODE == HImode) \ |
| UNSIGNEDP = 1; \ |
| (MODE) = SImode; \ |
| } |
| |
| /* Define this if most significant bit is lowest numbered |
| in instructions that operate on numbered bit-fields. */ |
| #define BITS_BIG_ENDIAN 0 |
| |
| /* Define this if most significant byte of a word is the lowest numbered. |
| Most ARM processors are run in little endian mode, so that is the default. |
| If you want to have it run-time selectable, change the definition in a |
| cover file to be TARGET_BIG_ENDIAN. */ |
| #define BYTES_BIG_ENDIAN (TARGET_BIG_END != 0) |
| |
| /* Define this if most significant word of a multiword number is the lowest |
| numbered. |
| This is always false, even when in big-endian mode. */ |
| #define WORDS_BIG_ENDIAN (BYTES_BIG_ENDIAN && ! TARGET_LITTLE_WORDS) |
| |
| #define UNITS_PER_WORD 4 |
| |
| /* True if natural alignment is used for doubleword types. */ |
| #define ARM_DOUBLEWORD_ALIGN TARGET_AAPCS_BASED |
| |
| #define DOUBLEWORD_ALIGNMENT 64 |
| |
| #define PARM_BOUNDARY 32 |
| |
| #define STACK_BOUNDARY (ARM_DOUBLEWORD_ALIGN ? DOUBLEWORD_ALIGNMENT : 32) |
| |
| #define PREFERRED_STACK_BOUNDARY \ |
| (arm_abi == ARM_ABI_ATPCS ? 64 : STACK_BOUNDARY) |
| |
| #define FUNCTION_BOUNDARY ((TARGET_THUMB && optimize_size) ? 16 : 32) |
| |
| /* The lowest bit is used to indicate Thumb-mode functions, so the |
| vbit must go into the delta field of pointers to member |
| functions. */ |
| #define TARGET_PTRMEMFUNC_VBIT_LOCATION ptrmemfunc_vbit_in_delta |
| |
| #define EMPTY_FIELD_BOUNDARY 32 |
| |
| #define BIGGEST_ALIGNMENT (ARM_DOUBLEWORD_ALIGN ? DOUBLEWORD_ALIGNMENT : 32) |
| |
| #define MALLOC_ABI_ALIGNMENT BIGGEST_ALIGNMENT |
| |
| /* XXX Blah -- this macro is used directly by libobjc. Since it |
| supports no vector modes, cut out the complexity and fall back |
| on BIGGEST_FIELD_ALIGNMENT. */ |
| #ifdef IN_TARGET_LIBS |
| #define BIGGEST_FIELD_ALIGNMENT 64 |
| #endif |
| |
| /* Make strings word-aligned so strcpy from constants will be faster. */ |
| #define CONSTANT_ALIGNMENT_FACTOR (TARGET_THUMB || ! arm_tune_xscale ? 1 : 2) |
| |
| #define CONSTANT_ALIGNMENT(EXP, ALIGN) \ |
| ((TREE_CODE (EXP) == STRING_CST \ |
| && !optimize_size \ |
| && (ALIGN) < BITS_PER_WORD * CONSTANT_ALIGNMENT_FACTOR) \ |
| ? BITS_PER_WORD * CONSTANT_ALIGNMENT_FACTOR : (ALIGN)) |
| |
| /* Align definitions of arrays, unions and structures so that |
| initializations and copies can be made more efficient. This is not |
| ABI-changing, so it only affects places where we can see the |
| definition. Increasing the alignment tends to introduce padding, |
| so don't do this when optimizing for size/conserving stack space. */ |
| #define ARM_EXPAND_ALIGNMENT(COND, EXP, ALIGN) \ |
| (((COND) && ((ALIGN) < BITS_PER_WORD) \ |
| && (TREE_CODE (EXP) == ARRAY_TYPE \ |
| || TREE_CODE (EXP) == UNION_TYPE \ |
| || TREE_CODE (EXP) == RECORD_TYPE)) ? BITS_PER_WORD : (ALIGN)) |
| |
| /* Align global data. */ |
| #define DATA_ALIGNMENT(EXP, ALIGN) \ |
| ARM_EXPAND_ALIGNMENT(!optimize_size, EXP, ALIGN) |
| |
| /* Similarly, make sure that objects on the stack are sensibly aligned. */ |
| #define LOCAL_ALIGNMENT(EXP, ALIGN) \ |
| ARM_EXPAND_ALIGNMENT(!flag_conserve_stack, EXP, ALIGN) |
| |
| /* Setting STRUCTURE_SIZE_BOUNDARY to 32 produces more efficient code, but the |
| value set in previous versions of this toolchain was 8, which produces more |
| compact structures. The command line option -mstructure_size_boundary=<n> |
| can be used to change this value. For compatibility with the ARM SDK |
| however the value should be left at 32. ARM SDT Reference Manual (ARM DUI |
| 0020D) page 2-20 says "Structures are aligned on word boundaries". |
| The AAPCS specifies a value of 8. */ |
| #define STRUCTURE_SIZE_BOUNDARY arm_structure_size_boundary |
| |
| /* This is the value used to initialize arm_structure_size_boundary. If a |
| particular arm target wants to change the default value it should change |
| the definition of this macro, not STRUCTURE_SIZE_BOUNDARY. See netbsd.h |
| for an example of this. */ |
| #ifndef DEFAULT_STRUCTURE_SIZE_BOUNDARY |
| #define DEFAULT_STRUCTURE_SIZE_BOUNDARY 32 |
| #endif |
| |
| /* Nonzero if move instructions will actually fail to work |
| when given unaligned data. */ |
| #define STRICT_ALIGNMENT 1 |
| |
| /* wchar_t is unsigned under the AAPCS. */ |
| #ifndef WCHAR_TYPE |
| #define WCHAR_TYPE (TARGET_AAPCS_BASED ? "unsigned int" : "int") |
| |
| #define WCHAR_TYPE_SIZE BITS_PER_WORD |
| #endif |
| |
| /* Sized for fixed-point types. */ |
| |
| #define SHORT_FRACT_TYPE_SIZE 8 |
| #define FRACT_TYPE_SIZE 16 |
| #define LONG_FRACT_TYPE_SIZE 32 |
| #define LONG_LONG_FRACT_TYPE_SIZE 64 |
| |
| #define SHORT_ACCUM_TYPE_SIZE 16 |
| #define ACCUM_TYPE_SIZE 32 |
| #define LONG_ACCUM_TYPE_SIZE 64 |
| #define LONG_LONG_ACCUM_TYPE_SIZE 64 |
| |
| #define MAX_FIXED_MODE_SIZE 64 |
| |
| #ifndef SIZE_TYPE |
| #define SIZE_TYPE (TARGET_AAPCS_BASED ? "unsigned int" : "long unsigned int") |
| #endif |
| |
| #ifndef PTRDIFF_TYPE |
| #define PTRDIFF_TYPE (TARGET_AAPCS_BASED ? "int" : "long int") |
| #endif |
| |
| /* AAPCS requires that structure alignment is affected by bitfields. */ |
| #ifndef PCC_BITFIELD_TYPE_MATTERS |
| #define PCC_BITFIELD_TYPE_MATTERS TARGET_AAPCS_BASED |
| #endif |
| |
| |
| /* Standard register usage. */ |
| |
| /* Register allocation in ARM Procedure Call Standard |
| (S - saved over call). |
| |
| r0 * argument word/integer result |
| r1-r3 argument word |
| |
| r4-r8 S register variable |
| r9 S (rfp) register variable (real frame pointer) |
| |
| r10 F S (sl) stack limit (used by -mapcs-stack-check) |
| r11 F S (fp) argument pointer |
| r12 (ip) temp workspace |
| r13 F S (sp) lower end of current stack frame |
| r14 (lr) link address/workspace |
| r15 F (pc) program counter |
| |
| cc This is NOT a real register, but is used internally |
| to represent things that use or set the condition |
| codes. |
| sfp This isn't either. It is used during rtl generation |
| since the offset between the frame pointer and the |
| auto's isn't known until after register allocation. |
| afp Nor this, we only need this because of non-local |
| goto. Without it fp appears to be used and the |
| elimination code won't get rid of sfp. It tracks |
| fp exactly at all times. |
| |
| *: See TARGET_CONDITIONAL_REGISTER_USAGE */ |
| |
| /* s0-s15 VFP scratch (aka d0-d7). |
| s16-s31 S VFP variable (aka d8-d15). |
| vfpcc Not a real register. Represents the VFP condition |
| code flags. */ |
| |
| /* The stack backtrace structure is as follows: |
| fp points to here: | save code pointer | [fp] |
| | return link value | [fp, #-4] |
| | return sp value | [fp, #-8] |
| | return fp value | [fp, #-12] |
| [| saved r10 value |] |
| [| saved r9 value |] |
| [| saved r8 value |] |
| [| saved r7 value |] |
| [| saved r6 value |] |
| [| saved r5 value |] |
| [| saved r4 value |] |
| [| saved r3 value |] |
| [| saved r2 value |] |
| [| saved r1 value |] |
| [| saved r0 value |] |
| r0-r3 are not normally saved in a C function. */ |
| |
| /* 1 for registers that have pervasive standard uses |
| and are not available for the register allocator. */ |
| #define FIXED_REGISTERS \ |
| { \ |
| /* Core regs. */ \ |
| 0,0,0,0,0,0,0,0, \ |
| 0,0,0,0,0,1,0,1, \ |
| /* VFP regs. */ \ |
| 1,1,1,1,1,1,1,1, \ |
| 1,1,1,1,1,1,1,1, \ |
| 1,1,1,1,1,1,1,1, \ |
| 1,1,1,1,1,1,1,1, \ |
| 1,1,1,1,1,1,1,1, \ |
| 1,1,1,1,1,1,1,1, \ |
| 1,1,1,1,1,1,1,1, \ |
| 1,1,1,1,1,1,1,1, \ |
| /* IWMMXT regs. */ \ |
| 1,1,1,1,1,1,1,1, \ |
| 1,1,1,1,1,1,1,1, \ |
| 1,1,1,1, \ |
| /* Specials. */ \ |
| 1,1,1,1 \ |
| } |
| |
| /* 1 for registers not available across function calls. |
| These must include the FIXED_REGISTERS and also any |
| registers that can be used without being saved. |
| The latter must include the registers where values are returned |
| and the register where structure-value addresses are passed. |
| Aside from that, you can include as many other registers as you like. |
| The CC is not preserved over function calls on the ARM 6, so it is |
| easier to assume this for all. SFP is preserved, since FP is. */ |
| #define CALL_USED_REGISTERS \ |
| { \ |
| /* Core regs. */ \ |
| 1,1,1,1,0,0,0,0, \ |
| 0,0,0,0,1,1,1,1, \ |
| /* VFP Regs. */ \ |
| 1,1,1,1,1,1,1,1, \ |
| 1,1,1,1,1,1,1,1, \ |
| 1,1,1,1,1,1,1,1, \ |
| 1,1,1,1,1,1,1,1, \ |
| 1,1,1,1,1,1,1,1, \ |
| 1,1,1,1,1,1,1,1, \ |
| 1,1,1,1,1,1,1,1, \ |
| 1,1,1,1,1,1,1,1, \ |
| /* IWMMXT regs. */ \ |
| 1,1,1,1,1,1,1,1, \ |
| 1,1,1,1,1,1,1,1, \ |
| 1,1,1,1, \ |
| /* Specials. */ \ |
| 1,1,1,1 \ |
| } |
| |
| #ifndef SUBTARGET_CONDITIONAL_REGISTER_USAGE |
| #define SUBTARGET_CONDITIONAL_REGISTER_USAGE |
| #endif |
| |
| /* These are a couple of extensions to the formats accepted |
| by asm_fprintf: |
| %@ prints out ASM_COMMENT_START |
| %r prints out REGISTER_PREFIX reg_names[arg] */ |
| #define ASM_FPRINTF_EXTENSIONS(FILE, ARGS, P) \ |
| case '@': \ |
| fputs (ASM_COMMENT_START, FILE); \ |
| break; \ |
| \ |
| case 'r': \ |
| fputs (REGISTER_PREFIX, FILE); \ |
| fputs (reg_names [va_arg (ARGS, int)], FILE); \ |
| break; |
| |
| /* Round X up to the nearest word. */ |
| #define ROUND_UP_WORD(X) (((X) + 3) & ~3) |
| |
| /* Convert fron bytes to ints. */ |
| #define ARM_NUM_INTS(X) (((X) + UNITS_PER_WORD - 1) / UNITS_PER_WORD) |
| |
| /* The number of (integer) registers required to hold a quantity of type MODE. |
| Also used for VFP registers. */ |
| #define ARM_NUM_REGS(MODE) \ |
| ARM_NUM_INTS (GET_MODE_SIZE (MODE)) |
| |
| /* The number of (integer) registers required to hold a quantity of TYPE MODE. */ |
| #define ARM_NUM_REGS2(MODE, TYPE) \ |
| ARM_NUM_INTS ((MODE) == BLKmode ? \ |
| int_size_in_bytes (TYPE) : GET_MODE_SIZE (MODE)) |
| |
| /* The number of (integer) argument register available. */ |
| #define NUM_ARG_REGS 4 |
| |
| /* And similarly for the VFP. */ |
| #define NUM_VFP_ARG_REGS 16 |
| |
| /* Return the register number of the N'th (integer) argument. */ |
| #define ARG_REGISTER(N) (N - 1) |
| |
| /* Specify the registers used for certain standard purposes. |
| The values of these macros are register numbers. */ |
| |
| /* The number of the last argument register. */ |
| #define LAST_ARG_REGNUM ARG_REGISTER (NUM_ARG_REGS) |
| |
| /* The numbers of the Thumb register ranges. */ |
| #define FIRST_LO_REGNUM 0 |
| #define LAST_LO_REGNUM 7 |
| #define FIRST_HI_REGNUM 8 |
| #define LAST_HI_REGNUM 11 |
| |
| /* Overridden by config/arm/bpabi.h. */ |
| #ifndef ARM_UNWIND_INFO |
| #define ARM_UNWIND_INFO 0 |
| #endif |
| |
| /* Use r0 and r1 to pass exception handling information. */ |
| #define EH_RETURN_DATA_REGNO(N) (((N) < 2) ? N : INVALID_REGNUM) |
| |
| /* The register that holds the return address in exception handlers. */ |
| #define ARM_EH_STACKADJ_REGNUM 2 |
| #define EH_RETURN_STACKADJ_RTX gen_rtx_REG (SImode, ARM_EH_STACKADJ_REGNUM) |
| |
| #ifndef ARM_TARGET2_DWARF_FORMAT |
| #define ARM_TARGET2_DWARF_FORMAT DW_EH_PE_pcrel |
| #endif |
| |
| /* ttype entries (the only interesting data references used) |
| use TARGET2 relocations. */ |
| #define ASM_PREFERRED_EH_DATA_FORMAT(code, data) \ |
| (((code) == 0 && (data) == 1 && ARM_UNWIND_INFO) ? ARM_TARGET2_DWARF_FORMAT \ |
| : DW_EH_PE_absptr) |
| |
| /* The native (Norcroft) Pascal compiler for the ARM passes the static chain |
| as an invisible last argument (possible since varargs don't exist in |
| Pascal), so the following is not true. */ |
| #define STATIC_CHAIN_REGNUM 12 |
| |
| /* Define this to be where the real frame pointer is if it is not possible to |
| work out the offset between the frame pointer and the automatic variables |
| until after register allocation has taken place. FRAME_POINTER_REGNUM |
| should point to a special register that we will make sure is eliminated. |
| |
| For the Thumb we have another problem. The TPCS defines the frame pointer |
| as r11, and GCC believes that it is always possible to use the frame pointer |
| as base register for addressing purposes. (See comments in |
| find_reloads_address()). But - the Thumb does not allow high registers, |
| including r11, to be used as base address registers. Hence our problem. |
| |
| The solution used here, and in the old thumb port is to use r7 instead of |
| r11 as the hard frame pointer and to have special code to generate |
| backtrace structures on the stack (if required to do so via a command line |
| option) using r11. This is the only 'user visible' use of r11 as a frame |
| pointer. */ |
| #define ARM_HARD_FRAME_POINTER_REGNUM 11 |
| #define THUMB_HARD_FRAME_POINTER_REGNUM 7 |
| |
| #define HARD_FRAME_POINTER_REGNUM \ |
| (TARGET_ARM \ |
| ? ARM_HARD_FRAME_POINTER_REGNUM \ |
| : THUMB_HARD_FRAME_POINTER_REGNUM) |
| |
| #define HARD_FRAME_POINTER_IS_FRAME_POINTER 0 |
| #define HARD_FRAME_POINTER_IS_ARG_POINTER 0 |
| |
| #define FP_REGNUM HARD_FRAME_POINTER_REGNUM |
| |
| /* Register to use for pushing function arguments. */ |
| #define STACK_POINTER_REGNUM SP_REGNUM |
| |
| #define FIRST_IWMMXT_REGNUM (LAST_HI_VFP_REGNUM + 1) |
| #define LAST_IWMMXT_REGNUM (FIRST_IWMMXT_REGNUM + 15) |
| |
| /* Need to sync with WCGR in iwmmxt.md. */ |
| #define FIRST_IWMMXT_GR_REGNUM (LAST_IWMMXT_REGNUM + 1) |
| #define LAST_IWMMXT_GR_REGNUM (FIRST_IWMMXT_GR_REGNUM + 3) |
| |
| #define IS_IWMMXT_REGNUM(REGNUM) \ |
| (((REGNUM) >= FIRST_IWMMXT_REGNUM) && ((REGNUM) <= LAST_IWMMXT_REGNUM)) |
| #define IS_IWMMXT_GR_REGNUM(REGNUM) \ |
| (((REGNUM) >= FIRST_IWMMXT_GR_REGNUM) && ((REGNUM) <= LAST_IWMMXT_GR_REGNUM)) |
| |
| /* Base register for access to local variables of the function. */ |
| #define FRAME_POINTER_REGNUM 102 |
| |
| /* Base register for access to arguments of the function. */ |
| #define ARG_POINTER_REGNUM 103 |
| |
| #define FIRST_VFP_REGNUM 16 |
| #define D7_VFP_REGNUM (FIRST_VFP_REGNUM + 15) |
| #define LAST_VFP_REGNUM \ |
| (TARGET_VFPD32 ? LAST_HI_VFP_REGNUM : LAST_LO_VFP_REGNUM) |
| |
| #define IS_VFP_REGNUM(REGNUM) \ |
| (((REGNUM) >= FIRST_VFP_REGNUM) && ((REGNUM) <= LAST_VFP_REGNUM)) |
| |
| /* VFP registers are split into two types: those defined by VFP versions < 3 |
| have D registers overlaid on consecutive pairs of S registers. VFP version 3 |
| defines 16 new D registers (d16-d31) which, for simplicity and correctness |
| in various parts of the backend, we implement as "fake" single-precision |
| registers (which would be S32-S63, but cannot be used in that way). The |
| following macros define these ranges of registers. */ |
| #define LAST_LO_VFP_REGNUM (FIRST_VFP_REGNUM + 31) |
| #define FIRST_HI_VFP_REGNUM (LAST_LO_VFP_REGNUM + 1) |
| #define LAST_HI_VFP_REGNUM (FIRST_HI_VFP_REGNUM + 31) |
| |
| #define VFP_REGNO_OK_FOR_SINGLE(REGNUM) \ |
| ((REGNUM) <= LAST_LO_VFP_REGNUM) |
| |
| /* DFmode values are only valid in even register pairs. */ |
| #define VFP_REGNO_OK_FOR_DOUBLE(REGNUM) \ |
| ((((REGNUM) - FIRST_VFP_REGNUM) & 1) == 0) |
| |
| /* Neon Quad values must start at a multiple of four registers. */ |
| #define NEON_REGNO_OK_FOR_QUAD(REGNUM) \ |
| ((((REGNUM) - FIRST_VFP_REGNUM) & 3) == 0) |
| |
| /* Neon structures of vectors must be in even register pairs and there |
| must be enough registers available. Because of various patterns |
| requiring quad registers, we require them to start at a multiple of |
| four. */ |
| #define NEON_REGNO_OK_FOR_NREGS(REGNUM, N) \ |
| ((((REGNUM) - FIRST_VFP_REGNUM) & 3) == 0 \ |
| && (LAST_VFP_REGNUM - (REGNUM) >= 2 * (N) - 1)) |
| |
| /* The number of hard registers is 16 ARM + 1 CC + 1 SFP + 1 AFP. */ |
| /* Intel Wireless MMX Technology registers add 16 + 4 more. */ |
| /* VFP (VFP3) adds 32 (64) + 1 VFPCC. */ |
| #define FIRST_PSEUDO_REGISTER 104 |
| |
| #define DBX_REGISTER_NUMBER(REGNO) arm_dbx_register_number (REGNO) |
| |
| /* Value should be nonzero if functions must have frame pointers. |
| Zero means the frame pointer need not be set up (and parms may be accessed |
| via the stack pointer) in functions that seem suitable. |
| If we have to have a frame pointer we might as well make use of it. |
| APCS says that the frame pointer does not need to be pushed in leaf |
| functions, or simple tail call functions. */ |
| |
| #ifndef SUBTARGET_FRAME_POINTER_REQUIRED |
| #define SUBTARGET_FRAME_POINTER_REQUIRED 0 |
| #endif |
| |
| /* Return number of consecutive hard regs needed starting at reg REGNO |
| to hold something of mode MODE. |
| This is ordinarily the length in words of a value of mode MODE |
| but can be less for certain modes in special long registers. |
| |
| On the ARM core regs are UNITS_PER_WORD bits wide. */ |
| #define HARD_REGNO_NREGS(REGNO, MODE) \ |
| ((TARGET_32BIT \ |
| && REGNO > PC_REGNUM \ |
| && REGNO != FRAME_POINTER_REGNUM \ |
| && REGNO != ARG_POINTER_REGNUM) \ |
| && !IS_VFP_REGNUM (REGNO) \ |
| ? 1 : ARM_NUM_REGS (MODE)) |
| |
| /* Return true if REGNO is suitable for holding a quantity of type MODE. */ |
| #define HARD_REGNO_MODE_OK(REGNO, MODE) \ |
| arm_hard_regno_mode_ok ((REGNO), (MODE)) |
| |
| #define MODES_TIEABLE_P(MODE1, MODE2) arm_modes_tieable_p (MODE1, MODE2) |
| |
| #define VALID_IWMMXT_REG_MODE(MODE) \ |
| (arm_vector_mode_supported_p (MODE) || (MODE) == DImode) |
| |
| /* Modes valid for Neon D registers. */ |
| #define VALID_NEON_DREG_MODE(MODE) \ |
| ((MODE) == V2SImode || (MODE) == V4HImode || (MODE) == V8QImode \ |
| || (MODE) == V4HFmode || (MODE) == V2SFmode || (MODE) == DImode) |
| |
| /* Modes valid for Neon Q registers. */ |
| #define VALID_NEON_QREG_MODE(MODE) \ |
| ((MODE) == V4SImode || (MODE) == V8HImode || (MODE) == V16QImode \ |
| || (MODE) == V4SFmode || (MODE) == V2DImode) |
| |
| /* Structure modes valid for Neon registers. */ |
| #define VALID_NEON_STRUCT_MODE(MODE) \ |
| ((MODE) == TImode || (MODE) == EImode || (MODE) == OImode \ |
| || (MODE) == CImode || (MODE) == XImode) |
| |
| /* The register numbers in sequence, for passing to arm_gen_load_multiple. */ |
| extern int arm_regs_in_sequence[]; |
| |
| /* The order in which register should be allocated. It is good to use ip |
| since no saving is required (though calls clobber it) and it never contains |
| function parameters. It is quite good to use lr since other calls may |
| clobber it anyway. Allocate r0 through r3 in reverse order since r3 is |
| least likely to contain a function parameter; in addition results are |
| returned in r0. |
| For VFP/VFPv3, allocate D16-D31 first, then caller-saved registers (D0-D7), |
| then D8-D15. The reason for doing this is to attempt to reduce register |
| pressure when both single- and double-precision registers are used in a |
| function. */ |
| |
| #define VREG(X) (FIRST_VFP_REGNUM + (X)) |
| #define WREG(X) (FIRST_IWMMXT_REGNUM + (X)) |
| #define WGREG(X) (FIRST_IWMMXT_GR_REGNUM + (X)) |
| |
| #define REG_ALLOC_ORDER \ |
| { \ |
| /* General registers. */ \ |
| 3, 2, 1, 0, 12, 14, 4, 5, \ |
| 6, 7, 8, 9, 10, 11, \ |
| /* High VFP registers. */ \ |
| VREG(32), VREG(33), VREG(34), VREG(35), \ |
| VREG(36), VREG(37), VREG(38), VREG(39), \ |
| VREG(40), VREG(41), VREG(42), VREG(43), \ |
| VREG(44), VREG(45), VREG(46), VREG(47), \ |
| VREG(48), VREG(49), VREG(50), VREG(51), \ |
| VREG(52), VREG(53), VREG(54), VREG(55), \ |
| VREG(56), VREG(57), VREG(58), VREG(59), \ |
| VREG(60), VREG(61), VREG(62), VREG(63), \ |
| /* VFP argument registers. */ \ |
| VREG(15), VREG(14), VREG(13), VREG(12), \ |
| VREG(11), VREG(10), VREG(9), VREG(8), \ |
| VREG(7), VREG(6), VREG(5), VREG(4), \ |
| VREG(3), VREG(2), VREG(1), VREG(0), \ |
| /* VFP call-saved registers. */ \ |
| VREG(16), VREG(17), VREG(18), VREG(19), \ |
| VREG(20), VREG(21), VREG(22), VREG(23), \ |
| VREG(24), VREG(25), VREG(26), VREG(27), \ |
| VREG(28), VREG(29), VREG(30), VREG(31), \ |
| /* IWMMX registers. */ \ |
| WREG(0), WREG(1), WREG(2), WREG(3), \ |
| WREG(4), WREG(5), WREG(6), WREG(7), \ |
| WREG(8), WREG(9), WREG(10), WREG(11), \ |
| WREG(12), WREG(13), WREG(14), WREG(15), \ |
| WGREG(0), WGREG(1), WGREG(2), WGREG(3), \ |
| /* Registers not for general use. */ \ |
| CC_REGNUM, VFPCC_REGNUM, \ |
| FRAME_POINTER_REGNUM, ARG_POINTER_REGNUM, \ |
| SP_REGNUM, PC_REGNUM \ |
| } |
| |
| /* Use different register alloc ordering for Thumb. */ |
| #define ADJUST_REG_ALLOC_ORDER arm_order_regs_for_local_alloc () |
| |
| /* Tell IRA to use the order we define rather than messing it up with its |
| own cost calculations. */ |
| #define HONOR_REG_ALLOC_ORDER |
| |
| /* Interrupt functions can only use registers that have already been |
| saved by the prologue, even if they would normally be |
| call-clobbered. */ |
| #define HARD_REGNO_RENAME_OK(SRC, DST) \ |
| (! IS_INTERRUPT (cfun->machine->func_type) || \ |
| df_regs_ever_live_p (DST)) |
| |
| /* Register and constant classes. */ |
| |
| /* Register classes. */ |
| enum reg_class |
| { |
| NO_REGS, |
| LO_REGS, |
| STACK_REG, |
| BASE_REGS, |
| HI_REGS, |
| CALLER_SAVE_REGS, |
| GENERAL_REGS, |
| CORE_REGS, |
| VFP_D0_D7_REGS, |
| VFP_LO_REGS, |
| VFP_HI_REGS, |
| VFP_REGS, |
| IWMMXT_REGS, |
| IWMMXT_GR_REGS, |
| CC_REG, |
| VFPCC_REG, |
| SFP_REG, |
| AFP_REG, |
| ALL_REGS, |
| LIM_REG_CLASSES |
| }; |
| |
| #define N_REG_CLASSES (int) LIM_REG_CLASSES |
| |
| /* Give names of register classes as strings for dump file. */ |
| #define REG_CLASS_NAMES \ |
| { \ |
| "NO_REGS", \ |
| "LO_REGS", \ |
| "STACK_REG", \ |
| "BASE_REGS", \ |
| "HI_REGS", \ |
| "CALLER_SAVE_REGS", \ |
| "GENERAL_REGS", \ |
| "CORE_REGS", \ |
| "VFP_D0_D7_REGS", \ |
| "VFP_LO_REGS", \ |
| "VFP_HI_REGS", \ |
| "VFP_REGS", \ |
| "IWMMXT_REGS", \ |
| "IWMMXT_GR_REGS", \ |
| "CC_REG", \ |
| "VFPCC_REG", \ |
| "SFP_REG", \ |
| "AFP_REG", \ |
| "ALL_REGS" \ |
| } |
| |
| /* Define which registers fit in which classes. |
| This is an initializer for a vector of HARD_REG_SET |
| of length N_REG_CLASSES. */ |
| #define REG_CLASS_CONTENTS \ |
| { \ |
| { 0x00000000, 0x00000000, 0x00000000, 0x00000000 }, /* NO_REGS */ \ |
| { 0x000000FF, 0x00000000, 0x00000000, 0x00000000 }, /* LO_REGS */ \ |
| { 0x00002000, 0x00000000, 0x00000000, 0x00000000 }, /* STACK_REG */ \ |
| { 0x000020FF, 0x00000000, 0x00000000, 0x00000000 }, /* BASE_REGS */ \ |
| { 0x00005F00, 0x00000000, 0x00000000, 0x00000000 }, /* HI_REGS */ \ |
| { 0x0000100F, 0x00000000, 0x00000000, 0x00000000 }, /* CALLER_SAVE_REGS */ \ |
| { 0x00005FFF, 0x00000000, 0x00000000, 0x00000000 }, /* GENERAL_REGS */ \ |
| { 0x00007FFF, 0x00000000, 0x00000000, 0x00000000 }, /* CORE_REGS */ \ |
| { 0xFFFF0000, 0x00000000, 0x00000000, 0x00000000 }, /* VFP_D0_D7_REGS */ \ |
| { 0xFFFF0000, 0x0000FFFF, 0x00000000, 0x00000000 }, /* VFP_LO_REGS */ \ |
| { 0x00000000, 0xFFFF0000, 0x0000FFFF, 0x00000000 }, /* VFP_HI_REGS */ \ |
| { 0xFFFF0000, 0xFFFFFFFF, 0x0000FFFF, 0x00000000 }, /* VFP_REGS */ \ |
| { 0x00000000, 0x00000000, 0xFFFF0000, 0x00000000 }, /* IWMMXT_REGS */ \ |
| { 0x00000000, 0x00000000, 0x00000000, 0x0000000F }, /* IWMMXT_GR_REGS */ \ |
| { 0x00000000, 0x00000000, 0x00000000, 0x00000010 }, /* CC_REG */ \ |
| { 0x00000000, 0x00000000, 0x00000000, 0x00000020 }, /* VFPCC_REG */ \ |
| { 0x00000000, 0x00000000, 0x00000000, 0x00000040 }, /* SFP_REG */ \ |
| { 0x00000000, 0x00000000, 0x00000000, 0x00000080 }, /* AFP_REG */ \ |
| { 0xFFFF7FFF, 0xFFFFFFFF, 0xFFFFFFFF, 0x0000000F } /* ALL_REGS */ \ |
| } |
| |
| /* Any of the VFP register classes. */ |
| #define IS_VFP_CLASS(X) \ |
| ((X) == VFP_D0_D7_REGS || (X) == VFP_LO_REGS \ |
| || (X) == VFP_HI_REGS || (X) == VFP_REGS) |
| |
| /* The same information, inverted: |
| Return the class number of the smallest class containing |
| reg number REGNO. This could be a conditional expression |
| or could index an array. */ |
| #define REGNO_REG_CLASS(REGNO) arm_regno_class (REGNO) |
| |
| /* In VFPv1, VFP registers could only be accessed in the mode they |
| were set, so subregs would be invalid there. However, we don't |
| support VFPv1 at the moment, and the restriction was lifted in |
| VFPv2. |
| In big-endian mode, modes greater than word size (i.e. DFmode) are stored in |
| VFP registers in little-endian order. We can't describe that accurately to |
| GCC, so avoid taking subregs of such values. |
| The only exception is going from a 128-bit to a 64-bit type. In that case |
| the data layout happens to be consistent for big-endian, so we explicitly allow |
| that case. */ |
| #define CANNOT_CHANGE_MODE_CLASS(FROM, TO, CLASS) \ |
| (TARGET_VFP && TARGET_BIG_END \ |
| && !(GET_MODE_SIZE (FROM) == 16 && GET_MODE_SIZE (TO) == 8) \ |
| && (GET_MODE_SIZE (FROM) > UNITS_PER_WORD \ |
| || GET_MODE_SIZE (TO) > UNITS_PER_WORD) \ |
| && reg_classes_intersect_p (VFP_REGS, (CLASS))) |
| |
| /* The class value for index registers, and the one for base regs. */ |
| #define INDEX_REG_CLASS (TARGET_THUMB1 ? LO_REGS : GENERAL_REGS) |
| #define BASE_REG_CLASS (TARGET_THUMB1 ? LO_REGS : CORE_REGS) |
| |
| /* For the Thumb the high registers cannot be used as base registers |
| when addressing quantities in QI or HI mode; if we don't know the |
| mode, then we must be conservative. */ |
| #define MODE_BASE_REG_CLASS(MODE) \ |
| (arm_lra_flag \ |
| ? (TARGET_32BIT ? CORE_REGS \ |
| : GET_MODE_SIZE (MODE) >= 4 ? BASE_REGS \ |
| : LO_REGS) \ |
| : ((TARGET_ARM || (TARGET_THUMB2 && !optimize_size)) ? CORE_REGS \ |
| : ((MODE) == SImode) ? BASE_REGS \ |
| : LO_REGS)) |
| |
| /* For Thumb we can not support SP+reg addressing, so we return LO_REGS |
| instead of BASE_REGS. */ |
| #define MODE_BASE_REG_REG_CLASS(MODE) BASE_REG_CLASS |
| |
| /* When this hook returns true for MODE, the compiler allows |
| registers explicitly used in the rtl to be used as spill registers |
| but prevents the compiler from extending the lifetime of these |
| registers. */ |
| #define TARGET_SMALL_REGISTER_CLASSES_FOR_MODE_P \ |
| arm_small_register_classes_for_mode_p |
| |
| /* Must leave BASE_REGS reloads alone */ |
| #define THUMB_SECONDARY_INPUT_RELOAD_CLASS(CLASS, MODE, X) \ |
| (lra_in_progress ? NO_REGS \ |
| : ((CLASS) != LO_REGS && (CLASS) != BASE_REGS \ |
| ? ((true_regnum (X) == -1 ? LO_REGS \ |
| : (true_regnum (X) + HARD_REGNO_NREGS (0, MODE) > 8) ? LO_REGS \ |
| : NO_REGS)) \ |
| : NO_REGS)) |
| |
| #define THUMB_SECONDARY_OUTPUT_RELOAD_CLASS(CLASS, MODE, X) \ |
| (lra_in_progress ? NO_REGS \ |
| : (CLASS) != LO_REGS && (CLASS) != BASE_REGS \ |
| ? ((true_regnum (X) == -1 ? LO_REGS \ |
| : (true_regnum (X) + HARD_REGNO_NREGS (0, MODE) > 8) ? LO_REGS \ |
| : NO_REGS)) \ |
| : NO_REGS) |
| |
| /* Return the register class of a scratch register needed to copy IN into |
| or out of a register in CLASS in MODE. If it can be done directly, |
| NO_REGS is returned. */ |
| #define SECONDARY_OUTPUT_RELOAD_CLASS(CLASS, MODE, X) \ |
| /* Restrict which direct reloads are allowed for VFP/iWMMXt regs. */ \ |
| ((TARGET_VFP && TARGET_HARD_FLOAT \ |
| && IS_VFP_CLASS (CLASS)) \ |
| ? coproc_secondary_reload_class (MODE, X, FALSE) \ |
| : (TARGET_IWMMXT && (CLASS) == IWMMXT_REGS) \ |
| ? coproc_secondary_reload_class (MODE, X, TRUE) \ |
| : TARGET_32BIT \ |
| ? (((MODE) == HImode && ! arm_arch4 && true_regnum (X) == -1) \ |
| ? GENERAL_REGS : NO_REGS) \ |
| : THUMB_SECONDARY_OUTPUT_RELOAD_CLASS (CLASS, MODE, X)) |
| |
| /* If we need to load shorts byte-at-a-time, then we need a scratch. */ |
| #define SECONDARY_INPUT_RELOAD_CLASS(CLASS, MODE, X) \ |
| /* Restrict which direct reloads are allowed for VFP/iWMMXt regs. */ \ |
| ((TARGET_VFP && TARGET_HARD_FLOAT \ |
| && IS_VFP_CLASS (CLASS)) \ |
| ? coproc_secondary_reload_class (MODE, X, FALSE) : \ |
| (TARGET_IWMMXT && (CLASS) == IWMMXT_REGS) ? \ |
| coproc_secondary_reload_class (MODE, X, TRUE) : \ |
| (TARGET_32BIT ? \ |
| (((CLASS) == IWMMXT_REGS || (CLASS) == IWMMXT_GR_REGS) \ |
| && CONSTANT_P (X)) \ |
| ? GENERAL_REGS : \ |
| (((MODE) == HImode && ! arm_arch4 \ |
| && (MEM_P (X) \ |
| || ((REG_P (X) || GET_CODE (X) == SUBREG) \ |
| && true_regnum (X) == -1))) \ |
| ? GENERAL_REGS : NO_REGS) \ |
| : THUMB_SECONDARY_INPUT_RELOAD_CLASS (CLASS, MODE, X))) |
| |
| /* Try a machine-dependent way of reloading an illegitimate address |
| operand. If we find one, push the reload and jump to WIN. This |
| macro is used in only one place: `find_reloads_address' in reload.c. |
| |
| For the ARM, we wish to handle large displacements off a base |
| register by splitting the addend across a MOV and the mem insn. |
| This can cut the number of reloads needed. */ |
| #define ARM_LEGITIMIZE_RELOAD_ADDRESS(X, MODE, OPNUM, TYPE, IND, WIN) \ |
| do \ |
| { \ |
| if (arm_legitimize_reload_address (&X, MODE, OPNUM, TYPE, IND)) \ |
| goto WIN; \ |
| } \ |
| while (0) |
| |
| /* XXX If an HImode FP+large_offset address is converted to an HImode |
| SP+large_offset address, then reload won't know how to fix it. It sees |
| only that SP isn't valid for HImode, and so reloads the SP into an index |
| register, but the resulting address is still invalid because the offset |
| is too big. We fix it here instead by reloading the entire address. */ |
| /* We could probably achieve better results by defining PROMOTE_MODE to help |
| cope with the variances between the Thumb's signed and unsigned byte and |
| halfword load instructions. */ |
| /* ??? This should be safe for thumb2, but we may be able to do better. */ |
| #define THUMB_LEGITIMIZE_RELOAD_ADDRESS(X, MODE, OPNUM, TYPE, IND_L, WIN) \ |
| do { \ |
| rtx new_x = thumb_legitimize_reload_address (&X, MODE, OPNUM, TYPE, IND_L); \ |
| if (new_x) \ |
| { \ |
| X = new_x; \ |
| goto WIN; \ |
| } \ |
| } while (0) |
| |
| #define LEGITIMIZE_RELOAD_ADDRESS(X, MODE, OPNUM, TYPE, IND_LEVELS, WIN) \ |
| if (TARGET_ARM) \ |
| ARM_LEGITIMIZE_RELOAD_ADDRESS (X, MODE, OPNUM, TYPE, IND_LEVELS, WIN); \ |
| else \ |
| THUMB_LEGITIMIZE_RELOAD_ADDRESS (X, MODE, OPNUM, TYPE, IND_LEVELS, WIN) |
| |
| /* Return the maximum number of consecutive registers |
| needed to represent mode MODE in a register of class CLASS. |
| ARM regs are UNITS_PER_WORD bits. |
| FIXME: Is this true for iWMMX? */ |
| #define CLASS_MAX_NREGS(CLASS, MODE) \ |
| (ARM_NUM_REGS (MODE)) |
| |
| /* If defined, gives a class of registers that cannot be used as the |
| operand of a SUBREG that changes the mode of the object illegally. */ |
| |
| /* Stack layout; function entry, exit and calling. */ |
| |
| /* Define this if pushing a word on the stack |
| makes the stack pointer a smaller address. */ |
| #define STACK_GROWS_DOWNWARD 1 |
| |
| /* Define this to nonzero if the nominal address of the stack frame |
| is at the high-address end of the local variables; |
| that is, each additional local variable allocated |
| goes at a more negative offset in the frame. */ |
| #define FRAME_GROWS_DOWNWARD 1 |
| |
| /* The amount of scratch space needed by _interwork_{r7,r11}_call_via_rN(). |
| When present, it is one word in size, and sits at the top of the frame, |
| between the soft frame pointer and either r7 or r11. |
| |
| We only need _interwork_rM_call_via_rN() for -mcaller-super-interworking, |
| and only then if some outgoing arguments are passed on the stack. It would |
| be tempting to also check whether the stack arguments are passed by indirect |
| calls, but there seems to be no reason in principle why a post-reload pass |
| couldn't convert a direct call into an indirect one. */ |
| #define CALLER_INTERWORKING_SLOT_SIZE \ |
| (TARGET_CALLER_INTERWORKING \ |
| && crtl->outgoing_args_size != 0 \ |
| ? UNITS_PER_WORD : 0) |
| |
| /* Offset within stack frame to start allocating local variables at. |
| If FRAME_GROWS_DOWNWARD, this is the offset to the END of the |
| first local allocated. Otherwise, it is the offset to the BEGINNING |
| of the first local allocated. */ |
| #define STARTING_FRAME_OFFSET 0 |
| |
| /* If we generate an insn to push BYTES bytes, |
| this says how many the stack pointer really advances by. */ |
| /* The push insns do not do this rounding implicitly. |
| So don't define this. */ |
| /* #define PUSH_ROUNDING(NPUSHED) ROUND_UP_WORD (NPUSHED) */ |
| |
| /* Define this if the maximum size of all the outgoing args is to be |
| accumulated and pushed during the prologue. The amount can be |
| found in the variable crtl->outgoing_args_size. */ |
| #define ACCUMULATE_OUTGOING_ARGS 1 |
| |
| /* Offset of first parameter from the argument pointer register value. */ |
| #define FIRST_PARM_OFFSET(FNDECL) (TARGET_ARM ? 4 : 0) |
| |
| /* Amount of memory needed for an untyped call to save all possible return |
| registers. */ |
| #define APPLY_RESULT_SIZE arm_apply_result_size() |
| |
| /* Define DEFAULT_PCC_STRUCT_RETURN to 1 if all structure and union return |
| values must be in memory. On the ARM, they need only do so if larger |
| than a word, or if they contain elements offset from zero in the struct. */ |
| #define DEFAULT_PCC_STRUCT_RETURN 0 |
| |
| /* These bits describe the different types of function supported |
| by the ARM backend. They are exclusive. i.e. a function cannot be both a |
| normal function and an interworked function, for example. Knowing the |
| type of a function is important for determining its prologue and |
| epilogue sequences. |
| Note value 7 is currently unassigned. Also note that the interrupt |
| function types all have bit 2 set, so that they can be tested for easily. |
| Note that 0 is deliberately chosen for ARM_FT_UNKNOWN so that when the |
| machine_function structure is initialized (to zero) func_type will |
| default to unknown. This will force the first use of arm_current_func_type |
| to call arm_compute_func_type. */ |
| #define ARM_FT_UNKNOWN 0 /* Type has not yet been determined. */ |
| #define ARM_FT_NORMAL 1 /* Your normal, straightforward function. */ |
| #define ARM_FT_INTERWORKED 2 /* A function that supports interworking. */ |
| #define ARM_FT_ISR 4 /* An interrupt service routine. */ |
| #define ARM_FT_FIQ 5 /* A fast interrupt service routine. */ |
| #define ARM_FT_EXCEPTION 6 /* An ARM exception handler (subcase of ISR). */ |
| |
| #define ARM_FT_TYPE_MASK ((1 << 3) - 1) |
| |
| /* In addition functions can have several type modifiers, |
| outlined by these bit masks: */ |
| #define ARM_FT_INTERRUPT (1 << 2) /* Note overlap with FT_ISR and above. */ |
| #define ARM_FT_NAKED (1 << 3) /* No prologue or epilogue. */ |
| #define ARM_FT_VOLATILE (1 << 4) /* Does not return. */ |
| #define ARM_FT_NESTED (1 << 5) /* Embedded inside another func. */ |
| #define ARM_FT_STACKALIGN (1 << 6) /* Called with misaligned stack. */ |
| |
| /* Some macros to test these flags. */ |
| #define ARM_FUNC_TYPE(t) (t & ARM_FT_TYPE_MASK) |
| #define IS_INTERRUPT(t) (t & ARM_FT_INTERRUPT) |
| #define IS_VOLATILE(t) (t & ARM_FT_VOLATILE) |
| #define IS_NAKED(t) (t & ARM_FT_NAKED) |
| #define IS_NESTED(t) (t & ARM_FT_NESTED) |
| #define IS_STACKALIGN(t) (t & ARM_FT_STACKALIGN) |
| |
| |
| /* Structure used to hold the function stack frame layout. Offsets are |
| relative to the stack pointer on function entry. Positive offsets are |
| in the direction of stack growth. |
| Only soft_frame is used in thumb mode. */ |
| |
| typedef struct GTY(()) arm_stack_offsets |
| { |
| int saved_args; /* ARG_POINTER_REGNUM. */ |
| int frame; /* ARM_HARD_FRAME_POINTER_REGNUM. */ |
| int saved_regs; |
| int soft_frame; /* FRAME_POINTER_REGNUM. */ |
| int locals_base; /* THUMB_HARD_FRAME_POINTER_REGNUM. */ |
| int outgoing_args; /* STACK_POINTER_REGNUM. */ |
| unsigned int saved_regs_mask; |
| } |
| arm_stack_offsets; |
| |
| #ifndef GENERATOR_FILE |
| /* A C structure for machine-specific, per-function data. |
| This is added to the cfun structure. */ |
| typedef struct GTY(()) machine_function |
| { |
| /* Additional stack adjustment in __builtin_eh_throw. */ |
| rtx eh_epilogue_sp_ofs; |
| /* Records if LR has to be saved for far jumps. */ |
| int far_jump_used; |
| /* Records if ARG_POINTER was ever live. */ |
| int arg_pointer_live; |
| /* Records if the save of LR has been eliminated. */ |
| int lr_save_eliminated; |
| /* The size of the stack frame. Only valid after reload. */ |
| arm_stack_offsets stack_offsets; |
| /* Records the type of the current function. */ |
| unsigned long func_type; |
| /* Record if the function has a variable argument list. */ |
| int uses_anonymous_args; |
| /* Records if sibcalls are blocked because an argument |
| register is needed to preserve stack alignment. */ |
| int sibcall_blocked; |
| /* The PIC register for this function. This might be a pseudo. */ |
| rtx pic_reg; |
| /* Labels for per-function Thumb call-via stubs. One per potential calling |
| register. We can never call via LR or PC. We can call via SP if a |
| trampoline happens to be on the top of the stack. */ |
| rtx call_via[14]; |
| /* Set to 1 when a return insn is output, this means that the epilogue |
| is not needed. */ |
| int return_used_this_function; |
| /* When outputting Thumb-1 code, record the last insn that provides |
| information about condition codes, and the comparison operands. */ |
| rtx thumb1_cc_insn; |
| rtx thumb1_cc_op0; |
| rtx thumb1_cc_op1; |
| /* Also record the CC mode that is supported. */ |
| enum machine_mode thumb1_cc_mode; |
| } |
| machine_function; |
| #endif |
| |
| /* As in the machine_function, a global set of call-via labels, for code |
| that is in text_section. */ |
| extern GTY(()) rtx thumb_call_via_label[14]; |
| |
| /* The number of potential ways of assigning to a co-processor. */ |
| #define ARM_NUM_COPROC_SLOTS 1 |
| |
| /* Enumeration of procedure calling standard variants. We don't really |
| support all of these yet. */ |
| enum arm_pcs |
| { |
| ARM_PCS_AAPCS, /* Base standard AAPCS. */ |
| ARM_PCS_AAPCS_VFP, /* Use VFP registers for floating point values. */ |
| ARM_PCS_AAPCS_IWMMXT, /* Use iWMMXT registers for vectors. */ |
| /* This must be the last AAPCS variant. */ |
| ARM_PCS_AAPCS_LOCAL, /* Private call within this compilation unit. */ |
| ARM_PCS_ATPCS, /* ATPCS. */ |
| ARM_PCS_APCS, /* APCS (legacy Linux etc). */ |
| ARM_PCS_UNKNOWN |
| }; |
| |
| /* Default procedure calling standard of current compilation unit. */ |
| extern enum arm_pcs arm_pcs_default; |
| |
| /* A C type for declaring a variable that is used as the first argument of |
| `FUNCTION_ARG' and other related values. */ |
| typedef struct |
| { |
| /* This is the number of registers of arguments scanned so far. */ |
| int nregs; |
| /* This is the number of iWMMXt register arguments scanned so far. */ |
| int iwmmxt_nregs; |
| int named_count; |
| int nargs; |
| /* Which procedure call variant to use for this call. */ |
| enum arm_pcs pcs_variant; |
| |
| /* AAPCS related state tracking. */ |
| int aapcs_arg_processed; /* No need to lay out this argument again. */ |
| int aapcs_cprc_slot; /* Index of co-processor rules to handle |
| this argument, or -1 if using core |
| registers. */ |
| int aapcs_ncrn; |
| int aapcs_next_ncrn; |
| rtx aapcs_reg; /* Register assigned to this argument. */ |
| int aapcs_partial; /* How many bytes are passed in regs (if |
| split between core regs and stack. |
| Zero otherwise. */ |
| int aapcs_cprc_failed[ARM_NUM_COPROC_SLOTS]; |
| int can_split; /* Argument can be split between core regs |
| and the stack. */ |
| /* Private data for tracking VFP register allocation */ |
| unsigned aapcs_vfp_regs_free; |
| unsigned aapcs_vfp_reg_alloc; |
| int aapcs_vfp_rcount; |
| MACHMODE aapcs_vfp_rmode; |
| } CUMULATIVE_ARGS; |
| |
| #define FUNCTION_ARG_PADDING(MODE, TYPE) \ |
| (arm_pad_arg_upward (MODE, TYPE) ? upward : downward) |
| |
| #define BLOCK_REG_PADDING(MODE, TYPE, FIRST) \ |
| (arm_pad_reg_upward (MODE, TYPE, FIRST) ? upward : downward) |
| |
| /* For AAPCS, padding should never be below the argument. For other ABIs, |
| * mimic the default. */ |
| #define PAD_VARARGS_DOWN \ |
| ((TARGET_AAPCS_BASED) ? 0 : BYTES_BIG_ENDIAN) |
| |
| /* Initialize a variable CUM of type CUMULATIVE_ARGS |
| for a call to a function whose data type is FNTYPE. |
| For a library call, FNTYPE is 0. |
| On the ARM, the offset starts at 0. */ |
| #define INIT_CUMULATIVE_ARGS(CUM, FNTYPE, LIBNAME, FNDECL, N_NAMED_ARGS) \ |
| arm_init_cumulative_args (&(CUM), (FNTYPE), (LIBNAME), (FNDECL)) |
| |
| /* 1 if N is a possible register number for function argument passing. |
| On the ARM, r0-r3 are used to pass args. */ |
| #define FUNCTION_ARG_REGNO_P(REGNO) \ |
| (IN_RANGE ((REGNO), 0, 3) \ |
| || (TARGET_AAPCS_BASED && TARGET_VFP && TARGET_HARD_FLOAT \ |
| && IN_RANGE ((REGNO), FIRST_VFP_REGNUM, FIRST_VFP_REGNUM + 15)) \ |
| || (TARGET_IWMMXT_ABI \ |
| && IN_RANGE ((REGNO), FIRST_IWMMXT_REGNUM, FIRST_IWMMXT_REGNUM + 9))) |
| |
| |
| /* If your target environment doesn't prefix user functions with an |
| underscore, you may wish to re-define this to prevent any conflicts. */ |
| #ifndef ARM_MCOUNT_NAME |
| #define ARM_MCOUNT_NAME "*mcount" |
| #endif |
| |
| /* Call the function profiler with a given profile label. The Acorn |
| compiler puts this BEFORE the prolog but gcc puts it afterwards. |
| On the ARM the full profile code will look like: |
| .data |
| LP1 |
| .word 0 |
| .text |
| mov ip, lr |
| bl mcount |
| .word LP1 |
| |
| profile_function() in final.c outputs the .data section, FUNCTION_PROFILER |
| will output the .text section. |
| |
| The ``mov ip,lr'' seems like a good idea to stick with cc convention. |
| ``prof'' doesn't seem to mind about this! |
| |
| Note - this version of the code is designed to work in both ARM and |
| Thumb modes. */ |
| #ifndef ARM_FUNCTION_PROFILER |
| #define ARM_FUNCTION_PROFILER(STREAM, LABELNO) \ |
| { \ |
| char temp[20]; \ |
| rtx sym; \ |
| \ |
| asm_fprintf (STREAM, "\tmov\t%r, %r\n\tbl\t", \ |
| IP_REGNUM, LR_REGNUM); \ |
| assemble_name (STREAM, ARM_MCOUNT_NAME); \ |
| fputc ('\n', STREAM); \ |
| ASM_GENERATE_INTERNAL_LABEL (temp, "LP", LABELNO); \ |
| sym = gen_rtx_SYMBOL_REF (Pmode, temp); \ |
| assemble_aligned_integer (UNITS_PER_WORD, sym); \ |
| } |
| #endif |
| |
| #ifdef THUMB_FUNCTION_PROFILER |
| #define FUNCTION_PROFILER(STREAM, LABELNO) \ |
| if (TARGET_ARM) \ |
| ARM_FUNCTION_PROFILER (STREAM, LABELNO) \ |
| else \ |
| THUMB_FUNCTION_PROFILER (STREAM, LABELNO) |
| #else |
| #define FUNCTION_PROFILER(STREAM, LABELNO) \ |
| ARM_FUNCTION_PROFILER (STREAM, LABELNO) |
| #endif |
| |
| /* EXIT_IGNORE_STACK should be nonzero if, when returning from a function, |
| the stack pointer does not matter. The value is tested only in |
| functions that have frame pointers. |
| No definition is equivalent to always zero. |
| |
| On the ARM, the function epilogue recovers the stack pointer from the |
| frame. */ |
| #define EXIT_IGNORE_STACK 1 |
| |
| #define EPILOGUE_USES(REGNO) (epilogue_completed && (REGNO) == LR_REGNUM) |
| |
| /* Determine if the epilogue should be output as RTL. |
| You should override this if you define FUNCTION_EXTRA_EPILOGUE. */ |
| #define USE_RETURN_INSN(ISCOND) \ |
| (TARGET_32BIT ? use_return_insn (ISCOND, NULL) : 0) |
| |
| /* Definitions for register eliminations. |
| |
| This is an array of structures. Each structure initializes one pair |
| of eliminable registers. The "from" register number is given first, |
| followed by "to". Eliminations of the same "from" register are listed |
| in order of preference. |
| |
| We have two registers that can be eliminated on the ARM. First, the |
| arg pointer register can often be eliminated in favor of the stack |
| pointer register. Secondly, the pseudo frame pointer register can always |
| be eliminated; it is replaced with either the stack or the real frame |
| pointer. Note we have to use {ARM|THUMB}_HARD_FRAME_POINTER_REGNUM |
| because the definition of HARD_FRAME_POINTER_REGNUM is not a constant. */ |
| |
| #define ELIMINABLE_REGS \ |
| {{ ARG_POINTER_REGNUM, STACK_POINTER_REGNUM },\ |
| { ARG_POINTER_REGNUM, FRAME_POINTER_REGNUM },\ |
| { ARG_POINTER_REGNUM, ARM_HARD_FRAME_POINTER_REGNUM },\ |
| { ARG_POINTER_REGNUM, THUMB_HARD_FRAME_POINTER_REGNUM },\ |
| { FRAME_POINTER_REGNUM, STACK_POINTER_REGNUM },\ |
| { FRAME_POINTER_REGNUM, ARM_HARD_FRAME_POINTER_REGNUM },\ |
| { FRAME_POINTER_REGNUM, THUMB_HARD_FRAME_POINTER_REGNUM }} |
| |
| /* Define the offset between two registers, one to be eliminated, and the |
| other its replacement, at the start of a routine. */ |
| #define INITIAL_ELIMINATION_OFFSET(FROM, TO, OFFSET) \ |
| if (TARGET_ARM) \ |
| (OFFSET) = arm_compute_initial_elimination_offset (FROM, TO); \ |
| else \ |
| (OFFSET) = thumb_compute_initial_elimination_offset (FROM, TO) |
| |
| /* Special case handling of the location of arguments passed on the stack. */ |
| #define DEBUGGER_ARG_OFFSET(value, addr) value ? value : arm_debugger_arg_offset (value, addr) |
| |
| /* Initialize data used by insn expanders. This is called from insn_emit, |
| once for every function before code is generated. */ |
| #define INIT_EXPANDERS arm_init_expanders () |
| |
| /* Length in units of the trampoline for entering a nested function. */ |
| #define TRAMPOLINE_SIZE (TARGET_32BIT ? 16 : 20) |
| |
| /* Alignment required for a trampoline in bits. */ |
| #define TRAMPOLINE_ALIGNMENT 32 |
| |
| /* Addressing modes, and classification of registers for them. */ |
| #define HAVE_POST_INCREMENT 1 |
| #define HAVE_PRE_INCREMENT TARGET_32BIT |
| #define HAVE_POST_DECREMENT TARGET_32BIT |
| #define HAVE_PRE_DECREMENT TARGET_32BIT |
| #define HAVE_PRE_MODIFY_DISP TARGET_32BIT |
| #define HAVE_POST_MODIFY_DISP TARGET_32BIT |
| #define HAVE_PRE_MODIFY_REG TARGET_32BIT |
| #define HAVE_POST_MODIFY_REG TARGET_32BIT |
| |
| enum arm_auto_incmodes |
| { |
| ARM_POST_INC, |
| ARM_PRE_INC, |
| ARM_POST_DEC, |
| ARM_PRE_DEC |
| }; |
| |
| #define ARM_AUTOINC_VALID_FOR_MODE_P(mode, code) \ |
| (TARGET_32BIT && arm_autoinc_modes_ok_p (mode, code)) |
| #define USE_LOAD_POST_INCREMENT(mode) \ |
| ARM_AUTOINC_VALID_FOR_MODE_P(mode, ARM_POST_INC) |
| #define USE_LOAD_PRE_INCREMENT(mode) \ |
| ARM_AUTOINC_VALID_FOR_MODE_P(mode, ARM_PRE_INC) |
| #define USE_LOAD_POST_DECREMENT(mode) \ |
| ARM_AUTOINC_VALID_FOR_MODE_P(mode, ARM_POST_DEC) |
| #define USE_LOAD_PRE_DECREMENT(mode) \ |
| ARM_AUTOINC_VALID_FOR_MODE_P(mode, ARM_PRE_DEC) |
| |
| #define USE_STORE_PRE_DECREMENT(mode) USE_LOAD_PRE_DECREMENT(mode) |
| #define USE_STORE_PRE_INCREMENT(mode) USE_LOAD_PRE_INCREMENT(mode) |
| #define USE_STORE_POST_DECREMENT(mode) USE_LOAD_POST_DECREMENT(mode) |
| #define USE_STORE_POST_INCREMENT(mode) USE_LOAD_POST_INCREMENT(mode) |
| |
| /* Macros to check register numbers against specific register classes. */ |
| |
| /* These assume that REGNO is a hard or pseudo reg number. |
| They give nonzero only if REGNO is a hard reg of the suitable class |
| or a pseudo reg currently allocated to a suitable hard reg. |
| Since they use reg_renumber, they are safe only once reg_renumber |
| has been allocated, which happens in reginfo.c during register |
| allocation. */ |
| #define TEST_REGNO(R, TEST, VALUE) \ |
| ((R TEST VALUE) || ((unsigned) reg_renumber[R] TEST VALUE)) |
| |
| /* Don't allow the pc to be used. */ |
| #define ARM_REGNO_OK_FOR_BASE_P(REGNO) \ |
| (TEST_REGNO (REGNO, <, PC_REGNUM) \ |
| || TEST_REGNO (REGNO, ==, FRAME_POINTER_REGNUM) \ |
| || TEST_REGNO (REGNO, ==, ARG_POINTER_REGNUM)) |
| |
| #define THUMB1_REGNO_MODE_OK_FOR_BASE_P(REGNO, MODE) \ |
| (TEST_REGNO (REGNO, <=, LAST_LO_REGNUM) \ |
| || (GET_MODE_SIZE (MODE) >= 4 \ |
| && TEST_REGNO (REGNO, ==, STACK_POINTER_REGNUM))) |
| |
| #define REGNO_MODE_OK_FOR_BASE_P(REGNO, MODE) \ |
| (TARGET_THUMB1 \ |
| ? THUMB1_REGNO_MODE_OK_FOR_BASE_P (REGNO, MODE) \ |
| : ARM_REGNO_OK_FOR_BASE_P (REGNO)) |
| |
| /* Nonzero if X can be the base register in a reg+reg addressing mode. |
| For Thumb, we can not use SP + reg, so reject SP. */ |
| #define REGNO_MODE_OK_FOR_REG_BASE_P(X, MODE) \ |
| REGNO_MODE_OK_FOR_BASE_P (X, QImode) |
| |
| /* For ARM code, we don't care about the mode, but for Thumb, the index |
| must be suitable for use in a QImode load. */ |
| #define REGNO_OK_FOR_INDEX_P(REGNO) \ |
| (REGNO_MODE_OK_FOR_BASE_P (REGNO, QImode) \ |
| && !TEST_REGNO (REGNO, ==, STACK_POINTER_REGNUM)) |
| |
| /* Maximum number of registers that can appear in a valid memory address. |
| Shifts in addresses can't be by a register. */ |
| #define MAX_REGS_PER_ADDRESS 2 |
| |
| /* Recognize any constant value that is a valid address. */ |
| /* XXX We can address any constant, eventually... */ |
| /* ??? Should the TARGET_ARM here also apply to thumb2? */ |
| #define CONSTANT_ADDRESS_P(X) \ |
| (GET_CODE (X) == SYMBOL_REF \ |
| && (CONSTANT_POOL_ADDRESS_P (X) \ |
| || (TARGET_ARM && optimize > 0 && SYMBOL_REF_FLAG (X)))) |
| |
| /* True if SYMBOL + OFFSET constants must refer to something within |
| SYMBOL's section. */ |
| #define ARM_OFFSETS_MUST_BE_WITHIN_SECTIONS_P 0 |
| |
| /* Nonzero if all target requires all absolute relocations be R_ARM_ABS32. */ |
| #ifndef TARGET_DEFAULT_WORD_RELOCATIONS |
| #define TARGET_DEFAULT_WORD_RELOCATIONS 0 |
| #endif |
| |
| #ifndef SUBTARGET_NAME_ENCODING_LENGTHS |
| #define SUBTARGET_NAME_ENCODING_LENGTHS |
| #endif |
| |
| /* This is a C fragment for the inside of a switch statement. |
| Each case label should return the number of characters to |
| be stripped from the start of a function's name, if that |
| name starts with the indicated character. */ |
| #define ARM_NAME_ENCODING_LENGTHS \ |
| case '*': return 1; \ |
| SUBTARGET_NAME_ENCODING_LENGTHS |
| |
| /* This is how to output a reference to a user-level label named NAME. |
| `assemble_name' uses this. */ |
| #undef ASM_OUTPUT_LABELREF |
| #define ASM_OUTPUT_LABELREF(FILE, NAME) \ |
| arm_asm_output_labelref (FILE, NAME) |
| |
| /* Output IT instructions for conditionally executed Thumb-2 instructions. */ |
| #define ASM_OUTPUT_OPCODE(STREAM, PTR) \ |
| if (TARGET_THUMB2) \ |
| thumb2_asm_output_opcode (STREAM); |
| |
| /* The EABI specifies that constructors should go in .init_array. |
| Other targets use .ctors for compatibility. */ |
| #ifndef ARM_EABI_CTORS_SECTION_OP |
| #define ARM_EABI_CTORS_SECTION_OP \ |
| "\t.section\t.init_array,\"aw\",%init_array" |
| #endif |
| #ifndef ARM_EABI_DTORS_SECTION_OP |
| #define ARM_EABI_DTORS_SECTION_OP \ |
| "\t.section\t.fini_array,\"aw\",%fini_array" |
| #endif |
| #define ARM_CTORS_SECTION_OP \ |
| "\t.section\t.ctors,\"aw\",%progbits" |
| #define ARM_DTORS_SECTION_OP \ |
| "\t.section\t.dtors,\"aw\",%progbits" |
| |
| /* Define CTORS_SECTION_ASM_OP. */ |
| #undef CTORS_SECTION_ASM_OP |
| #undef DTORS_SECTION_ASM_OP |
| #ifndef IN_LIBGCC2 |
| # define CTORS_SECTION_ASM_OP \ |
| (TARGET_AAPCS_BASED ? ARM_EABI_CTORS_SECTION_OP : ARM_CTORS_SECTION_OP) |
| # define DTORS_SECTION_ASM_OP \ |
| (TARGET_AAPCS_BASED ? ARM_EABI_DTORS_SECTION_OP : ARM_DTORS_SECTION_OP) |
| #else /* !defined (IN_LIBGCC2) */ |
| /* In libgcc, CTORS_SECTION_ASM_OP must be a compile-time constant, |
| so we cannot use the definition above. */ |
| # ifdef __ARM_EABI__ |
| /* The .ctors section is not part of the EABI, so we do not define |
| CTORS_SECTION_ASM_OP when in libgcc; that prevents crtstuff |
| from trying to use it. We do define it when doing normal |
| compilation, as .init_array can be used instead of .ctors. */ |
| /* There is no need to emit begin or end markers when using |
| init_array; the dynamic linker will compute the size of the |
| array itself based on special symbols created by the static |
| linker. However, we do need to arrange to set up |
| exception-handling here. */ |
| # define CTOR_LIST_BEGIN asm (ARM_EABI_CTORS_SECTION_OP) |
| # define CTOR_LIST_END /* empty */ |
| # define DTOR_LIST_BEGIN asm (ARM_EABI_DTORS_SECTION_OP) |
| # define DTOR_LIST_END /* empty */ |
| # else /* !defined (__ARM_EABI__) */ |
| # define CTORS_SECTION_ASM_OP ARM_CTORS_SECTION_OP |
| # define DTORS_SECTION_ASM_OP ARM_DTORS_SECTION_OP |
| # endif /* !defined (__ARM_EABI__) */ |
| #endif /* !defined (IN_LIBCC2) */ |
| |
| /* True if the operating system can merge entities with vague linkage |
| (e.g., symbols in COMDAT group) during dynamic linking. */ |
| #ifndef TARGET_ARM_DYNAMIC_VAGUE_LINKAGE_P |
| #define TARGET_ARM_DYNAMIC_VAGUE_LINKAGE_P true |
| #endif |
| |
| #define ARM_OUTPUT_FN_UNWIND(F, PROLOGUE) arm_output_fn_unwind (F, PROLOGUE) |
| |
| /* The macros REG_OK_FOR..._P assume that the arg is a REG rtx |
| and check its validity for a certain class. |
| We have two alternate definitions for each of them. |
| The usual definition accepts all pseudo regs; the other rejects |
| them unless they have been allocated suitable hard regs. |
| The symbol REG_OK_STRICT causes the latter definition to be used. |
| Thumb-2 has the same restrictions as arm. */ |
| #ifndef REG_OK_STRICT |
| |
| #define ARM_REG_OK_FOR_BASE_P(X) \ |
| (REGNO (X) <= LAST_ARM_REGNUM \ |
| || REGNO (X) >= FIRST_PSEUDO_REGISTER \ |
| || REGNO (X) == FRAME_POINTER_REGNUM \ |
| || REGNO (X) == ARG_POINTER_REGNUM) |
| |
| #define ARM_REG_OK_FOR_INDEX_P(X) \ |
| ((REGNO (X) <= LAST_ARM_REGNUM \ |
| && REGNO (X) != STACK_POINTER_REGNUM) \ |
| || REGNO (X) >= FIRST_PSEUDO_REGISTER \ |
| || REGNO (X) == FRAME_POINTER_REGNUM \ |
| || REGNO (X) == ARG_POINTER_REGNUM) |
| |
| #define THUMB1_REG_MODE_OK_FOR_BASE_P(X, MODE) \ |
| (REGNO (X) <= LAST_LO_REGNUM \ |
| || REGNO (X) >= FIRST_PSEUDO_REGISTER \ |
| || (GET_MODE_SIZE (MODE) >= 4 \ |
| && (REGNO (X) == STACK_POINTER_REGNUM \ |
| || (X) == hard_frame_pointer_rtx \ |
| || (X) == arg_pointer_rtx))) |
| |
| #define REG_STRICT_P 0 |
| |
| #else /* REG_OK_STRICT */ |
| |
| #define ARM_REG_OK_FOR_BASE_P(X) \ |
| ARM_REGNO_OK_FOR_BASE_P (REGNO (X)) |
| |
| #define ARM_REG_OK_FOR_INDEX_P(X) \ |
| ARM_REGNO_OK_FOR_INDEX_P (REGNO (X)) |
| |
| #define THUMB1_REG_MODE_OK_FOR_BASE_P(X, MODE) \ |
| THUMB1_REGNO_MODE_OK_FOR_BASE_P (REGNO (X), MODE) |
| |
| #define REG_STRICT_P 1 |
| |
| #endif /* REG_OK_STRICT */ |
| |
| /* Now define some helpers in terms of the above. */ |
| |
| #define REG_MODE_OK_FOR_BASE_P(X, MODE) \ |
| (TARGET_THUMB1 \ |
| ? THUMB1_REG_MODE_OK_FOR_BASE_P (X, MODE) \ |
| : ARM_REG_OK_FOR_BASE_P (X)) |
| |
| /* For 16-bit Thumb, a valid index register is anything that can be used in |
| a byte load instruction. */ |
| #define THUMB1_REG_OK_FOR_INDEX_P(X) \ |
| THUMB1_REG_MODE_OK_FOR_BASE_P (X, QImode) |
| |
| /* Nonzero if X is a hard reg that can be used as an index |
| or if it is a pseudo reg. On the Thumb, the stack pointer |
| is not suitable. */ |
| #define REG_OK_FOR_INDEX_P(X) \ |
| (TARGET_THUMB1 \ |
| ? THUMB1_REG_OK_FOR_INDEX_P (X) \ |
| : ARM_REG_OK_FOR_INDEX_P (X)) |
| |
| /* Nonzero if X can be the base register in a reg+reg addressing mode. |
| For Thumb, we can not use SP + reg, so reject SP. */ |
| #define REG_MODE_OK_FOR_REG_BASE_P(X, MODE) \ |
| REG_OK_FOR_INDEX_P (X) |
| |
| #define ARM_BASE_REGISTER_RTX_P(X) \ |
| (REG_P (X) && ARM_REG_OK_FOR_BASE_P (X)) |
| |
| #define ARM_INDEX_REGISTER_RTX_P(X) \ |
| (REG_P (X) && ARM_REG_OK_FOR_INDEX_P (X)) |
| |
| /* Specify the machine mode that this machine uses |
| for the index in the tablejump instruction. */ |
| #define CASE_VECTOR_MODE Pmode |
| |
| #define CASE_VECTOR_PC_RELATIVE (TARGET_THUMB2 \ |
| || (TARGET_THUMB1 \ |
| && (optimize_size || flag_pic))) |
| |
| #define CASE_VECTOR_SHORTEN_MODE(min, max, body) \ |
| (TARGET_THUMB1 \ |
| ? (min >= 0 && max < 512 \ |
| ? (ADDR_DIFF_VEC_FLAGS (body).offset_unsigned = 1, QImode) \ |
| : min >= -256 && max < 256 \ |
| ? (ADDR_DIFF_VEC_FLAGS (body).offset_unsigned = 0, QImode) \ |
| : min >= 0 && max < 8192 \ |
| ? (ADDR_DIFF_VEC_FLAGS (body).offset_unsigned = 1, HImode) \ |
| : min >= -4096 && max < 4096 \ |
| ? (ADDR_DIFF_VEC_FLAGS (body).offset_unsigned = 0, HImode) \ |
| : SImode) \ |
| : ((min < 0 || max >= 0x20000 || !TARGET_THUMB2) ? SImode \ |
| : (max >= 0x200) ? HImode \ |
| : QImode)) |
| |
| /* signed 'char' is most compatible, but RISC OS wants it unsigned. |
| unsigned is probably best, but may break some code. */ |
| #ifndef DEFAULT_SIGNED_CHAR |
| #define DEFAULT_SIGNED_CHAR 0 |
| #endif |
| |
| /* Max number of bytes we can move from memory to memory |
| in one reasonably fast instruction. */ |
| #define MOVE_MAX 4 |
| |
| #undef MOVE_RATIO |
| #define MOVE_RATIO(speed) (arm_tune_xscale ? 4 : 2) |
| |
| /* Define if operations between registers always perform the operation |
| on the full register even if a narrower mode is specified. */ |
| #define WORD_REGISTER_OPERATIONS |
| |
| /* Define if loading in MODE, an integral mode narrower than BITS_PER_WORD |
| will either zero-extend or sign-extend. The value of this macro should |
| be the code that says which one of the two operations is implicitly |
| done, UNKNOWN if none. */ |
| #define LOAD_EXTEND_OP(MODE) \ |
| (TARGET_THUMB ? ZERO_EXTEND : \ |
| ((arm_arch4 || (MODE) == QImode) ? ZERO_EXTEND \ |
| : ((BYTES_BIG_ENDIAN && (MODE) == HImode) ? SIGN_EXTEND : UNKNOWN))) |
| |
| /* Nonzero if access to memory by bytes is slow and undesirable. */ |
| #define SLOW_BYTE_ACCESS 0 |
| |
| #define SLOW_UNALIGNED_ACCESS(MODE, ALIGN) 1 |
| |
| /* Immediate shift counts are truncated by the output routines (or was it |
| the assembler?). Shift counts in a register are truncated by ARM. Note |
| that the native compiler puts too large (> 32) immediate shift counts |
| into a register and shifts by the register, letting the ARM decide what |
| to do instead of doing that itself. */ |
| /* This is all wrong. Defining SHIFT_COUNT_TRUNCATED tells combine that |
| code like (X << (Y % 32)) for register X, Y is equivalent to (X << Y). |
| On the arm, Y in a register is used modulo 256 for the shift. Only for |
| rotates is modulo 32 used. */ |
| /* #define SHIFT_COUNT_TRUNCATED 1 */ |
| |
| /* All integers have the same format so truncation is easy. */ |
| #define TRULY_NOOP_TRUNCATION(OUTPREC, INPREC) 1 |
| |
| /* Calling from registers is a massive pain. */ |
| #define NO_FUNCTION_CSE 1 |
| |
| /* The machine modes of pointers and functions */ |
| #define Pmode SImode |
| #define FUNCTION_MODE Pmode |
| |
| #define ARM_FRAME_RTX(X) \ |
| ( (X) == frame_pointer_rtx || (X) == stack_pointer_rtx \ |
| || (X) == arg_pointer_rtx) |
| |
| /* Try to generate sequences that don't involve branches, we can then use |
| conditional instructions. */ |
| #define BRANCH_COST(speed_p, predictable_p) \ |
| (current_tune->branch_cost (speed_p, predictable_p)) |
| |
| /* False if short circuit operation is preferred. */ |
| #define LOGICAL_OP_NON_SHORT_CIRCUIT \ |
| ((optimize_size) \ |
| ? (TARGET_THUMB ? false : true) \ |
| : (current_tune->logical_op_non_short_circuit[TARGET_ARM])) |
| |
| |
| /* Position Independent Code. */ |
| /* We decide which register to use based on the compilation options and |
| the assembler in use; this is more general than the APCS restriction of |
| using sb (r9) all the time. */ |
| extern unsigned arm_pic_register; |
| |
| /* The register number of the register used to address a table of static |
| data addresses in memory. */ |
| #define PIC_OFFSET_TABLE_REGNUM arm_pic_register |
| |
| /* We can't directly access anything that contains a symbol, |
| nor can we indirect via the constant pool. One exception is |
| UNSPEC_TLS, which is always PIC. */ |
| #define LEGITIMATE_PIC_OPERAND_P(X) \ |
| (!(symbol_mentioned_p (X) \ |
| || label_mentioned_p (X) \ |
| || (GET_CODE (X) == SYMBOL_REF \ |
| && CONSTANT_POOL_ADDRESS_P (X) \ |
| && (symbol_mentioned_p (get_pool_constant (X)) \ |
| || label_mentioned_p (get_pool_constant (X))))) \ |
| || tls_mentioned_p (X)) |
| |
| /* We need to know when we are making a constant pool; this determines |
| whether data needs to be in the GOT or can be referenced via a GOT |
| offset. */ |
| extern int making_const_table; |
| |
| /* Handle pragmas for compatibility with Intel's compilers. */ |
| /* Also abuse this to register additional C specific EABI attributes. */ |
| #define REGISTER_TARGET_PRAGMAS() do { \ |
| c_register_pragma (0, "long_calls", arm_pr_long_calls); \ |
| c_register_pragma (0, "no_long_calls", arm_pr_no_long_calls); \ |
| c_register_pragma (0, "long_calls_off", arm_pr_long_calls_off); \ |
| arm_lang_object_attributes_init(); \ |
| } while (0) |
| |
| /* Condition code information. */ |
| /* Given a comparison code (EQ, NE, etc.) and the first operand of a COMPARE, |
| return the mode to be used for the comparison. */ |
| |
| #define SELECT_CC_MODE(OP, X, Y) arm_select_cc_mode (OP, X, Y) |
| |
| #define REVERSIBLE_CC_MODE(MODE) 1 |
| |
| #define REVERSE_CONDITION(CODE,MODE) \ |
| (((MODE) == CCFPmode || (MODE) == CCFPEmode) \ |
| ? reverse_condition_maybe_unordered (code) \ |
| : reverse_condition (code)) |
| |
| /* The arm5 clz instruction returns 32. */ |
| #define CLZ_DEFINED_VALUE_AT_ZERO(MODE, VALUE) ((VALUE) = 32, 1) |
| #define CTZ_DEFINED_VALUE_AT_ZERO(MODE, VALUE) ((VALUE) = 32, 1) |
| |
| #define CC_STATUS_INIT \ |
| do { cfun->machine->thumb1_cc_insn = NULL_RTX; } while (0) |
| |
| #undef ASM_APP_OFF |
| #define ASM_APP_OFF (TARGET_THUMB1 ? "\t.code\t16\n" : \ |
| TARGET_THUMB2 ? "\t.thumb\n" : "") |
| |
| /* Output a push or a pop instruction (only used when profiling). |
| We can't push STATIC_CHAIN_REGNUM (r12) directly with Thumb-1. We know |
| that ASM_OUTPUT_REG_PUSH will be matched with ASM_OUTPUT_REG_POP, and |
| that r7 isn't used by the function profiler, so we can use it as a |
| scratch reg. WARNING: This isn't safe in the general case! It may be |
| sensitive to future changes in final.c:profile_function. */ |
| #define ASM_OUTPUT_REG_PUSH(STREAM, REGNO) \ |
| do \ |
| { \ |
| if (TARGET_ARM) \ |
| asm_fprintf (STREAM,"\tstmfd\t%r!,{%r}\n", \ |
| STACK_POINTER_REGNUM, REGNO); \ |
| else if (TARGET_THUMB1 \ |
| && (REGNO) == STATIC_CHAIN_REGNUM) \ |
| { \ |
| asm_fprintf (STREAM, "\tpush\t{r7}\n"); \ |
| asm_fprintf (STREAM, "\tmov\tr7, %r\n", REGNO);\ |
| asm_fprintf (STREAM, "\tpush\t{r7}\n"); \ |
| } \ |
| else \ |
| asm_fprintf (STREAM, "\tpush {%r}\n", REGNO); \ |
| } while (0) |
| |
| |
| /* See comment for ASM_OUTPUT_REG_PUSH concerning Thumb-1 issue. */ |
| #define ASM_OUTPUT_REG_POP(STREAM, REGNO) \ |
| do \ |
| { \ |
| if (TARGET_ARM) \ |
| asm_fprintf (STREAM, "\tldmfd\t%r!,{%r}\n", \ |
| STACK_POINTER_REGNUM, REGNO); \ |
| else if (TARGET_THUMB1 \ |
| && (REGNO) == STATIC_CHAIN_REGNUM) \ |
| { \ |
| asm_fprintf (STREAM, "\tpop\t{r7}\n"); \ |
| asm_fprintf (STREAM, "\tmov\t%r, r7\n", REGNO);\ |
| asm_fprintf (STREAM, "\tpop\t{r7}\n"); \ |
| } \ |
| else \ |
| asm_fprintf (STREAM, "\tpop {%r}\n", REGNO); \ |
| } while (0) |
| |
| #define ADDR_VEC_ALIGN(JUMPTABLE) \ |
| ((TARGET_THUMB && GET_MODE (PATTERN (JUMPTABLE)) == SImode) ? 2 : 0) |
| |
| /* Alignment for case labels comes from ADDR_VEC_ALIGN; avoid the |
| default alignment from elfos.h. */ |
| #undef ASM_OUTPUT_BEFORE_CASE_LABEL |
| #define ASM_OUTPUT_BEFORE_CASE_LABEL(FILE, PREFIX, NUM, TABLE) /* Empty. */ |
| |
| #define LABEL_ALIGN_AFTER_BARRIER(LABEL) \ |
| (GET_CODE (PATTERN (prev_active_insn (LABEL))) == ADDR_DIFF_VEC \ |
| ? 1 : 0) |
| |
| #define ARM_DECLARE_FUNCTION_NAME(STREAM, NAME, DECL) \ |
| do \ |
| { \ |
| if (TARGET_THUMB) \ |
| { \ |
| if (is_called_in_ARM_mode (DECL) \ |
| || (TARGET_THUMB1 && !TARGET_THUMB1_ONLY \ |
| && cfun->is_thunk)) \ |
| fprintf (STREAM, "\t.code 32\n") ; \ |
| else if (TARGET_THUMB1) \ |
| fprintf (STREAM, "\t.code\t16\n\t.thumb_func\n") ; \ |
| else \ |
| fprintf (STREAM, "\t.thumb\n\t.thumb_func\n") ; \ |
| } \ |
| if (TARGET_POKE_FUNCTION_NAME) \ |
| arm_poke_function_name (STREAM, (const char *) NAME); \ |
| } \ |
| while (0) |
| |
| /* For aliases of functions we use .thumb_set instead. */ |
| #define ASM_OUTPUT_DEF_FROM_DECLS(FILE, DECL1, DECL2) \ |
| do \ |
| { \ |
| const char *const LABEL1 = XSTR (XEXP (DECL_RTL (decl), 0), 0); \ |
| const char *const LABEL2 = IDENTIFIER_POINTER (DECL2); \ |
| \ |
| if (TARGET_THUMB && TREE_CODE (DECL1) == FUNCTION_DECL) \ |
| { \ |
| fprintf (FILE, "\t.thumb_set "); \ |
| assemble_name (FILE, LABEL1); \ |
| fprintf (FILE, ","); \ |
| assemble_name (FILE, LABEL2); \ |
| fprintf (FILE, "\n"); \ |
| } \ |
| else \ |
| ASM_OUTPUT_DEF (FILE, LABEL1, LABEL2); \ |
| } \ |
| while (0) |
| |
| #ifdef HAVE_GAS_MAX_SKIP_P2ALIGN |
| /* To support -falign-* switches we need to use .p2align so |
| that alignment directives in code sections will be padded |
| with no-op instructions, rather than zeroes. */ |
| #define ASM_OUTPUT_MAX_SKIP_ALIGN(FILE, LOG, MAX_SKIP) \ |
| if ((LOG) != 0) \ |
| { \ |
| if ((MAX_SKIP) == 0) \ |
| fprintf ((FILE), "\t.p2align %d\n", (int) (LOG)); \ |
| else \ |
| fprintf ((FILE), "\t.p2align %d,,%d\n", \ |
| (int) (LOG), (int) (MAX_SKIP)); \ |
| } |
| #endif |
| |
| /* Add two bytes to the length of conditionally executed Thumb-2 |
| instructions for the IT instruction. */ |
| #define ADJUST_INSN_LENGTH(insn, length) \ |
| if (TARGET_THUMB2 && GET_CODE (PATTERN (insn)) == COND_EXEC) \ |
| length += 2; |
| |
| /* Only perform branch elimination (by making instructions conditional) if |
| we're optimizing. For Thumb-2 check if any IT instructions need |
| outputting. */ |
| #define FINAL_PRESCAN_INSN(INSN, OPVEC, NOPERANDS) \ |
| if (TARGET_ARM && optimize) \ |
| arm_final_prescan_insn (INSN); \ |
| else if (TARGET_THUMB2) \ |
| thumb2_final_prescan_insn (INSN); \ |
| else if (TARGET_THUMB1) \ |
| thumb1_final_prescan_insn (INSN) |
| |
| #define ARM_SIGN_EXTEND(x) ((HOST_WIDE_INT) \ |
| (HOST_BITS_PER_WIDE_INT <= 32 ? (unsigned HOST_WIDE_INT) (x) \ |
| : ((((unsigned HOST_WIDE_INT)(x)) & (unsigned HOST_WIDE_INT) 0xffffffff) |\ |
| ((((unsigned HOST_WIDE_INT)(x)) & (unsigned HOST_WIDE_INT) 0x80000000) \ |
| ? ((~ (unsigned HOST_WIDE_INT) 0) \ |
| & ~ (unsigned HOST_WIDE_INT) 0xffffffff) \ |
| : 0)))) |
| |
| /* A C expression whose value is RTL representing the value of the return |
| address for the frame COUNT steps up from the current frame. */ |
| |
| #define RETURN_ADDR_RTX(COUNT, FRAME) \ |
| arm_return_addr (COUNT, FRAME) |
| |
| /* Mask of the bits in the PC that contain the real return address |
| when running in 26-bit mode. */ |
| #define RETURN_ADDR_MASK26 (0x03fffffc) |
| |
| /* Pick up the return address upon entry to a procedure. Used for |
| dwarf2 unwind information. This also enables the table driven |
| mechanism. */ |
| #define INCOMING_RETURN_ADDR_RTX gen_rtx_REG (Pmode, LR_REGNUM) |
| #define DWARF_FRAME_RETURN_COLUMN DWARF_FRAME_REGNUM (LR_REGNUM) |
| |
| /* Used to mask out junk bits from the return address, such as |
| processor state, interrupt status, condition codes and the like. */ |
| #define MASK_RETURN_ADDR \ |
| /* If we are generating code for an ARM2/ARM3 machine or for an ARM6 \ |
| in 26 bit mode, the condition codes must be masked out of the \ |
| return address. This does not apply to ARM6 and later processors \ |
| when running in 32 bit mode. */ \ |
| ((arm_arch4 || TARGET_THUMB) \ |
| ? (gen_int_mode ((unsigned long)0xffffffff, Pmode)) \ |
| : arm_gen_return_addr_mask ()) |
| |
| |
| /* Do not emit .note.GNU-stack by default. */ |
| #ifndef NEED_INDICATE_EXEC_STACK |
| #define NEED_INDICATE_EXEC_STACK 0 |
| #endif |
| |
| #define TARGET_ARM_ARCH \ |
| (arm_base_arch) \ |
| |
| #define TARGET_ARM_V6M (!arm_arch_notm && !arm_arch_thumb2) |
| #define TARGET_ARM_V7M (!arm_arch_notm && arm_arch_thumb2) |
| |
| /* The highest Thumb instruction set version supported by the chip. */ |
| #define TARGET_ARM_ARCH_ISA_THUMB \ |
| (arm_arch_thumb2 ? 2 \ |
| : ((TARGET_ARM_ARCH >= 5 || arm_arch4t) ? 1 : 0)) |
| |
| /* Expands to an upper-case char of the target's architectural |
| profile. */ |
| #define TARGET_ARM_ARCH_PROFILE \ |
| (!arm_arch_notm \ |
| ? 'M' \ |
| : (arm_arch7 \ |
| ? (strlen (arm_arch_name) >=3 \ |
| ? (arm_arch_name[strlen (arm_arch_name) - 3]) \ |
| : 0) \ |
| : 0)) |
| |
| /* Bit-field indicating what size LDREX/STREX loads/stores are available. |
| Bit 0 for bytes, up to bit 3 for double-words. */ |
| #define TARGET_ARM_FEATURE_LDREX \ |
| ((TARGET_HAVE_LDREX ? 4 : 0) \ |
| | (TARGET_HAVE_LDREXBH ? 3 : 0) \ |
| | (TARGET_HAVE_LDREXD ? 8 : 0)) |
| |
| /* Set as a bit mask indicating the available widths of hardware floating |
| point types. Where bit 1 indicates 16-bit support, bit 2 indicates |
| 32-bit support, bit 3 indicates 64-bit support. */ |
| #define TARGET_ARM_FP \ |
| (TARGET_VFP_SINGLE ? 4 \ |
| : (TARGET_VFP_DOUBLE ? (TARGET_FP16 ? 14 : 12) : 0)) |
| |
| |
| /* Set as a bit mask indicating the available widths of floating point |
| types for hardware NEON floating point. This is the same as |
| TARGET_ARM_FP without the 64-bit bit set. */ |
| #ifdef TARGET_NEON |
| #define TARGET_NEON_FP \ |
| (TARGET_ARM_FP & (0xff ^ 0x08)) |
| #endif |
| |
| /* The maximum number of parallel loads or stores we support in an ldm/stm |
| instruction. */ |
| #define MAX_LDM_STM_OPS 4 |
| |
| #define BIG_LITTLE_SPEC \ |
| " %{mcpu=*:-mcpu=%:rewrite_mcpu(%{mcpu=*:%*})}" |
| |
| extern const char *arm_rewrite_mcpu (int argc, const char **argv); |
| #define BIG_LITTLE_CPU_SPEC_FUNCTIONS \ |
| { "rewrite_mcpu", arm_rewrite_mcpu }, |
| |
| #define ASM_CPU_SPEC \ |
| " %{mcpu=generic-*:-march=%*;" \ |
| " :%{march=*:-march=%*}}" \ |
| BIG_LITTLE_SPEC |
| |
| /* -mcpu=native handling only makes sense with compiler running on |
| an ARM chip. */ |
| #if defined(__arm__) |
| extern const char *host_detect_local_cpu (int argc, const char **argv); |
| # define EXTRA_SPEC_FUNCTIONS \ |
| { "local_cpu_detect", host_detect_local_cpu }, \ |
| BIG_LITTLE_CPU_SPEC_FUNCTIONS |
| |
| # define MCPU_MTUNE_NATIVE_SPECS \ |
| " %{march=native:%<march=native %:local_cpu_detect(arch)}" \ |
| " %{mcpu=native:%<mcpu=native %:local_cpu_detect(cpu)}" \ |
| " %{mtune=native:%<mtune=native %:local_cpu_detect(tune)}" |
| #else |
| # define MCPU_MTUNE_NATIVE_SPECS "" |
| # define EXTRA_SPEC_FUNCTIONS BIG_LITTLE_CPU_SPEC_FUNCTIONS |
| #endif |
| |
| #define DRIVER_SELF_SPECS MCPU_MTUNE_NATIVE_SPECS |
| |
| #endif /* ! GCC_ARM_H */ |