| /* |
| * Copyright (c) 2011 The WebRTC project authors. All Rights Reserved. |
| * |
| * Use of this source code is governed by a BSD-style license |
| * that can be found in the LICENSE file in the root of the source |
| * tree. An additional intellectual property rights grant can be found |
| * in the file PATENTS. All contributing project authors may |
| * be found in the AUTHORS file in the root of the source tree. |
| */ |
| |
| |
| // This header file includes the inline functions for ARM processors in |
| // the fix point signal processing library. |
| |
| #ifndef WEBRTC_SPL_SPL_INL_ARMV7_H_ |
| #define WEBRTC_SPL_SPL_INL_ARMV7_H_ |
| |
| // TODO(kma): Replace some assembly code with GCC intrinsics |
| // (e.g. __builtin_clz). |
| |
| static __inline WebRtc_Word32 WEBRTC_SPL_MUL_16_32_RSFT16(WebRtc_Word16 a, |
| WebRtc_Word32 b) { |
| WebRtc_Word32 tmp; |
| __asm__("smulwb %0, %1, %2":"=r"(tmp):"r"(b), "r"(a)); |
| return tmp; |
| } |
| |
| static __inline WebRtc_Word32 WEBRTC_SPL_MUL_32_32_RSFT32(WebRtc_Word16 a, |
| WebRtc_Word16 b, |
| WebRtc_Word32 c) { |
| WebRtc_Word32 tmp; |
| __asm__("pkhbt %0, %1, %2, lsl #16" : "=r"(tmp) : "r"(b), "r"(a)); |
| __asm__("smmul %0, %1, %2":"=r"(tmp):"r"(tmp), "r"(c)); |
| return tmp; |
| } |
| |
| static __inline WebRtc_Word32 WEBRTC_SPL_MUL_32_32_RSFT32BI(WebRtc_Word32 a, |
| WebRtc_Word32 b) { |
| WebRtc_Word32 tmp; |
| __asm__("smmul %0, %1, %2":"=r"(tmp):"r"(a), "r"(b)); |
| return tmp; |
| } |
| |
| static __inline WebRtc_Word32 WEBRTC_SPL_MUL_16_16(WebRtc_Word16 a, |
| WebRtc_Word16 b) { |
| WebRtc_Word32 tmp; |
| __asm__("smulbb %0, %1, %2":"=r"(tmp):"r"(a), "r"(b)); |
| return tmp; |
| } |
| |
| static __inline int32_t WebRtc_MulAccumW16(int16_t a, |
| int16_t b, |
| int32_t c) { |
| int32_t tmp = 0; |
| __asm__("smlabb %0, %1, %2, %3":"=r"(tmp):"r"(a), "r"(b), "r"(c)); |
| return tmp; |
| } |
| |
| static __inline WebRtc_Word16 WebRtcSpl_AddSatW16(WebRtc_Word16 a, |
| WebRtc_Word16 b) { |
| WebRtc_Word32 s_sum; |
| |
| __asm__("qadd16 %0, %1, %2":"=r"(s_sum):"r"(a), "r"(b)); |
| |
| return (WebRtc_Word16) s_sum; |
| } |
| |
| static __inline WebRtc_Word32 WebRtcSpl_AddSatW32(WebRtc_Word32 l_var1, |
| WebRtc_Word32 l_var2) { |
| WebRtc_Word32 l_sum; |
| |
| __asm__("qadd %0, %1, %2":"=r"(l_sum):"r"(l_var1), "r"(l_var2)); |
| |
| return l_sum; |
| } |
| |
| static __inline WebRtc_Word16 WebRtcSpl_SubSatW16(WebRtc_Word16 var1, |
| WebRtc_Word16 var2) { |
| WebRtc_Word32 s_sub; |
| |
| __asm__("qsub16 %0, %1, %2":"=r"(s_sub):"r"(var1), "r"(var2)); |
| |
| return (WebRtc_Word16)s_sub; |
| } |
| |
| static __inline WebRtc_Word32 WebRtcSpl_SubSatW32(WebRtc_Word32 l_var1, |
| WebRtc_Word32 l_var2) { |
| WebRtc_Word32 l_sub; |
| |
| __asm__("qsub %0, %1, %2":"=r"(l_sub):"r"(l_var1), "r"(l_var2)); |
| |
| return l_sub; |
| } |
| |
| static __inline WebRtc_Word16 WebRtcSpl_GetSizeInBits(WebRtc_UWord32 n) { |
| WebRtc_Word32 tmp; |
| |
| __asm__("clz %0, %1":"=r"(tmp):"r"(n)); |
| |
| return (WebRtc_Word16)(32 - tmp); |
| } |
| |
| static __inline int WebRtcSpl_NormW32(WebRtc_Word32 a) { |
| WebRtc_Word32 tmp; |
| |
| if (a <= 0) a ^= 0xFFFFFFFF; |
| |
| __asm__("clz %0, %1":"=r"(tmp):"r"(a)); |
| |
| return tmp - 1; |
| } |
| |
| static __inline int WebRtcSpl_NormU32(WebRtc_UWord32 a) { |
| int tmp; |
| |
| if (a == 0) return 0; |
| |
| __asm__("clz %0, %1":"=r"(tmp):"r"(a)); |
| |
| return tmp; |
| } |
| |
| static __inline int WebRtcSpl_NormW16(WebRtc_Word16 a) { |
| WebRtc_Word32 tmp; |
| |
| if (a <= 0) a ^= 0xFFFFFFFF; |
| |
| __asm__("clz %0, %1":"=r"(tmp):"r"(a)); |
| |
| return tmp - 17; |
| } |
| |
| static __inline WebRtc_Word16 WebRtcSpl_SatW32ToW16(WebRtc_Word32 value32) { |
| WebRtc_Word16 out16; |
| |
| __asm__("ssat %r0, #16, %r1" : "=r"(out16) : "r"(value32)); |
| |
| return out16; |
| } |
| #endif // WEBRTC_SPL_SPL_INL_ARMV7_H_ |