| /* |
| * XVID MPEG-4 VIDEO CODEC |
| * - SSE2 inverse discrete cosine transform - |
| * |
| * Copyright(C) 2003 Pascal Massimino <skal@planet-d.net> |
| * |
| * Conversion to gcc syntax with modifications |
| * by Alexander Strange <astrange@ithinksw.com> |
| * |
| * Originally from dct/x86_asm/fdct_sse2_skal.asm in Xvid. |
| * |
| * This file is part of FFmpeg. |
| * |
| * Vertical pass is an implementation of the scheme: |
| * Loeffler C., Ligtenberg A., and Moschytz C.S.: |
| * Practical Fast 1D DCT Algorithm with Eleven Multiplications, |
| * Proc. ICASSP 1989, 988-991. |
| * |
| * Horizontal pass is a double 4x4 vector/matrix multiplication, |
| * (see also Intel's Application Note 922: |
| * http://developer.intel.com/vtune/cbts/strmsimd/922down.htm |
| * Copyright (C) 1999 Intel Corporation) |
| * |
| * More details at http://skal.planet-d.net/coding/dct.html |
| * |
| * FFmpeg is free software; you can redistribute it and/or |
| * modify it under the terms of the GNU Lesser General Public |
| * License as published by the Free Software Foundation; either |
| * version 2.1 of the License, or (at your option) any later version. |
| * |
| * FFmpeg 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 |
| * Lesser General Public License for more details. |
| * |
| * You should have received a copy of the GNU Lesser General Public License |
| * along with FFmpeg; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
| */ |
| |
| #include "libavcodec/dsputil.h" |
| #include "idct_xvid.h" |
| |
| /*! |
| * @file libavcodec/x86/idct_sse2_xvid.c |
| * @brief SSE2 idct compatible with xvidmmx |
| */ |
| |
| #define X8(x) x,x,x,x,x,x,x,x |
| |
| #define ROW_SHIFT 11 |
| #define COL_SHIFT 6 |
| |
| DECLARE_ASM_CONST(16, int16_t, tan1[]) = {X8(13036)}; // tan( pi/16) |
| DECLARE_ASM_CONST(16, int16_t, tan2[]) = {X8(27146)}; // tan(2pi/16) = sqrt(2)-1 |
| DECLARE_ASM_CONST(16, int16_t, tan3[]) = {X8(43790)}; // tan(3pi/16)-1 |
| DECLARE_ASM_CONST(16, int16_t, sqrt2[])= {X8(23170)}; // 0.5/sqrt(2) |
| DECLARE_ASM_CONST(8, uint8_t, m127[]) = {X8(127)}; |
| |
| DECLARE_ASM_CONST(16, int16_t, iTab1[]) = { |
| 0x4000, 0x539f, 0xc000, 0xac61, 0x4000, 0xdd5d, 0x4000, 0xdd5d, |
| 0x4000, 0x22a3, 0x4000, 0x22a3, 0xc000, 0x539f, 0x4000, 0xac61, |
| 0x3249, 0x11a8, 0x4b42, 0xee58, 0x11a8, 0x4b42, 0x11a8, 0xcdb7, |
| 0x58c5, 0x4b42, 0xa73b, 0xcdb7, 0x3249, 0xa73b, 0x4b42, 0xa73b |
| }; |
| |
| DECLARE_ASM_CONST(16, int16_t, iTab2[]) = { |
| 0x58c5, 0x73fc, 0xa73b, 0x8c04, 0x58c5, 0xcff5, 0x58c5, 0xcff5, |
| 0x58c5, 0x300b, 0x58c5, 0x300b, 0xa73b, 0x73fc, 0x58c5, 0x8c04, |
| 0x45bf, 0x187e, 0x6862, 0xe782, 0x187e, 0x6862, 0x187e, 0xba41, |
| 0x7b21, 0x6862, 0x84df, 0xba41, 0x45bf, 0x84df, 0x6862, 0x84df |
| }; |
| |
| DECLARE_ASM_CONST(16, int16_t, iTab3[]) = { |
| 0x539f, 0x6d41, 0xac61, 0x92bf, 0x539f, 0xd2bf, 0x539f, 0xd2bf, |
| 0x539f, 0x2d41, 0x539f, 0x2d41, 0xac61, 0x6d41, 0x539f, 0x92bf, |
| 0x41b3, 0x1712, 0x6254, 0xe8ee, 0x1712, 0x6254, 0x1712, 0xbe4d, |
| 0x73fc, 0x6254, 0x8c04, 0xbe4d, 0x41b3, 0x8c04, 0x6254, 0x8c04 |
| }; |
| |
| DECLARE_ASM_CONST(16, int16_t, iTab4[]) = { |
| 0x4b42, 0x6254, 0xb4be, 0x9dac, 0x4b42, 0xd746, 0x4b42, 0xd746, |
| 0x4b42, 0x28ba, 0x4b42, 0x28ba, 0xb4be, 0x6254, 0x4b42, 0x9dac, |
| 0x3b21, 0x14c3, 0x587e, 0xeb3d, 0x14c3, 0x587e, 0x14c3, 0xc4df, |
| 0x6862, 0x587e, 0x979e, 0xc4df, 0x3b21, 0x979e, 0x587e, 0x979e |
| }; |
| |
| DECLARE_ASM_CONST(16, int32_t, walkenIdctRounders[]) = { |
| 65536, 65536, 65536, 65536, |
| 3597, 3597, 3597, 3597, |
| 2260, 2260, 2260, 2260, |
| 1203, 1203, 1203, 1203, |
| 120, 120, 120, 120, |
| 512, 512, 512, 512 |
| }; |
| |
| // Temporary storage before the column pass |
| #define ROW1 "%%xmm6" |
| #define ROW3 "%%xmm4" |
| #define ROW5 "%%xmm5" |
| #define ROW7 "%%xmm7" |
| |
| #define CLEAR_ODD(r) "pxor "r","r" \n\t" |
| #define PUT_ODD(dst) "pshufhw $0x1B, %%xmm2, "dst" \n\t" |
| |
| #if ARCH_X86_64 |
| |
| # define ROW0 "%%xmm8" |
| # define REG0 ROW0 |
| # define ROW2 "%%xmm9" |
| # define REG2 ROW2 |
| # define ROW4 "%%xmm10" |
| # define REG4 ROW4 |
| # define ROW6 "%%xmm11" |
| # define REG6 ROW6 |
| # define CLEAR_EVEN(r) CLEAR_ODD(r) |
| # define PUT_EVEN(dst) PUT_ODD(dst) |
| # define XMMS "%%xmm12" |
| # define MOV_32_ONLY "#" |
| # define SREG2 REG2 |
| # define TAN3 "%%xmm13" |
| # define TAN1 "%%xmm14" |
| |
| #else |
| |
| # define ROW0 "(%0)" |
| # define REG0 "%%xmm4" |
| # define ROW2 "2*16(%0)" |
| # define REG2 "%%xmm4" |
| # define ROW4 "4*16(%0)" |
| # define REG4 "%%xmm6" |
| # define ROW6 "6*16(%0)" |
| # define REG6 "%%xmm6" |
| # define CLEAR_EVEN(r) |
| # define PUT_EVEN(dst) \ |
| "pshufhw $0x1B, %%xmm2, %%xmm2 \n\t" \ |
| "movdqa %%xmm2, "dst" \n\t" |
| # define XMMS "%%xmm2" |
| # define MOV_32_ONLY "movdqa " |
| # define SREG2 "%%xmm7" |
| # define TAN3 "%%xmm0" |
| # define TAN1 "%%xmm2" |
| |
| #endif |
| |
| #define ROUND(x) "paddd "MANGLE(x) |
| |
| #define JZ(reg, to) \ |
| "testl "reg","reg" \n\t" \ |
| "jz "to" \n\t" |
| |
| #define JNZ(reg, to) \ |
| "testl "reg","reg" \n\t" \ |
| "jnz "to" \n\t" |
| |
| #define TEST_ONE_ROW(src, reg, clear) \ |
| clear \ |
| "movq "src", %%mm1 \n\t" \ |
| "por 8+"src", %%mm1 \n\t" \ |
| "paddusb %%mm0, %%mm1 \n\t" \ |
| "pmovmskb %%mm1, "reg" \n\t" |
| |
| #define TEST_TWO_ROWS(row1, row2, reg1, reg2, clear1, clear2) \ |
| clear1 \ |
| clear2 \ |
| "movq "row1", %%mm1 \n\t" \ |
| "por 8+"row1", %%mm1 \n\t" \ |
| "movq "row2", %%mm2 \n\t" \ |
| "por 8+"row2", %%mm2 \n\t" \ |
| "paddusb %%mm0, %%mm1 \n\t" \ |
| "paddusb %%mm0, %%mm2 \n\t" \ |
| "pmovmskb %%mm1, "reg1" \n\t" \ |
| "pmovmskb %%mm2, "reg2" \n\t" |
| |
| ///IDCT pass on rows. |
| #define iMTX_MULT(src, table, rounder, put) \ |
| "movdqa "src", %%xmm3 \n\t" \ |
| "movdqa %%xmm3, %%xmm0 \n\t" \ |
| "pshufd $0x11, %%xmm3, %%xmm1 \n\t" /* 4602 */ \ |
| "punpcklqdq %%xmm0, %%xmm0 \n\t" /* 0246 */ \ |
| "pmaddwd "table", %%xmm0 \n\t" \ |
| "pmaddwd 16+"table", %%xmm1 \n\t" \ |
| "pshufd $0xBB, %%xmm3, %%xmm2 \n\t" /* 5713 */ \ |
| "punpckhqdq %%xmm3, %%xmm3 \n\t" /* 1357 */ \ |
| "pmaddwd 32+"table", %%xmm2 \n\t" \ |
| "pmaddwd 48+"table", %%xmm3 \n\t" \ |
| "paddd %%xmm1, %%xmm0 \n\t" \ |
| "paddd %%xmm3, %%xmm2 \n\t" \ |
| rounder", %%xmm0 \n\t" \ |
| "movdqa %%xmm2, %%xmm3 \n\t" \ |
| "paddd %%xmm0, %%xmm2 \n\t" \ |
| "psubd %%xmm3, %%xmm0 \n\t" \ |
| "psrad $11, %%xmm2 \n\t" \ |
| "psrad $11, %%xmm0 \n\t" \ |
| "packssdw %%xmm0, %%xmm2 \n\t" \ |
| put \ |
| "1: \n\t" |
| |
| #define iLLM_HEAD \ |
| "movdqa "MANGLE(tan3)", "TAN3" \n\t" \ |
| "movdqa "MANGLE(tan1)", "TAN1" \n\t" \ |
| |
| ///IDCT pass on columns. |
| #define iLLM_PASS(dct) \ |
| "movdqa "TAN3", %%xmm1 \n\t" \ |
| "movdqa "TAN1", %%xmm3 \n\t" \ |
| "pmulhw %%xmm4, "TAN3" \n\t" \ |
| "pmulhw %%xmm5, %%xmm1 \n\t" \ |
| "paddsw %%xmm4, "TAN3" \n\t" \ |
| "paddsw %%xmm5, %%xmm1 \n\t" \ |
| "psubsw %%xmm5, "TAN3" \n\t" \ |
| "paddsw %%xmm4, %%xmm1 \n\t" \ |
| "pmulhw %%xmm7, %%xmm3 \n\t" \ |
| "pmulhw %%xmm6, "TAN1" \n\t" \ |
| "paddsw %%xmm6, %%xmm3 \n\t" \ |
| "psubsw %%xmm7, "TAN1" \n\t" \ |
| "movdqa %%xmm3, %%xmm7 \n\t" \ |
| "movdqa "TAN1", %%xmm6 \n\t" \ |
| "psubsw %%xmm1, %%xmm3 \n\t" \ |
| "psubsw "TAN3", "TAN1" \n\t" \ |
| "paddsw %%xmm7, %%xmm1 \n\t" \ |
| "paddsw %%xmm6, "TAN3" \n\t" \ |
| "movdqa %%xmm3, %%xmm6 \n\t" \ |
| "psubsw "TAN3", %%xmm3 \n\t" \ |
| "paddsw %%xmm6, "TAN3" \n\t" \ |
| "movdqa "MANGLE(sqrt2)", %%xmm4 \n\t" \ |
| "pmulhw %%xmm4, %%xmm3 \n\t" \ |
| "pmulhw %%xmm4, "TAN3" \n\t" \ |
| "paddsw "TAN3", "TAN3" \n\t" \ |
| "paddsw %%xmm3, %%xmm3 \n\t" \ |
| "movdqa "MANGLE(tan2)", %%xmm7 \n\t" \ |
| MOV_32_ONLY ROW2", "REG2" \n\t" \ |
| MOV_32_ONLY ROW6", "REG6" \n\t" \ |
| "movdqa %%xmm7, %%xmm5 \n\t" \ |
| "pmulhw "REG6", %%xmm7 \n\t" \ |
| "pmulhw "REG2", %%xmm5 \n\t" \ |
| "paddsw "REG2", %%xmm7 \n\t" \ |
| "psubsw "REG6", %%xmm5 \n\t" \ |
| MOV_32_ONLY ROW0", "REG0" \n\t" \ |
| MOV_32_ONLY ROW4", "REG4" \n\t" \ |
| MOV_32_ONLY" "TAN1", (%0) \n\t" \ |
| "movdqa "REG0", "XMMS" \n\t" \ |
| "psubsw "REG4", "REG0" \n\t" \ |
| "paddsw "XMMS", "REG4" \n\t" \ |
| "movdqa "REG4", "XMMS" \n\t" \ |
| "psubsw %%xmm7, "REG4" \n\t" \ |
| "paddsw "XMMS", %%xmm7 \n\t" \ |
| "movdqa "REG0", "XMMS" \n\t" \ |
| "psubsw %%xmm5, "REG0" \n\t" \ |
| "paddsw "XMMS", %%xmm5 \n\t" \ |
| "movdqa %%xmm5, "XMMS" \n\t" \ |
| "psubsw "TAN3", %%xmm5 \n\t" \ |
| "paddsw "XMMS", "TAN3" \n\t" \ |
| "movdqa "REG0", "XMMS" \n\t" \ |
| "psubsw %%xmm3, "REG0" \n\t" \ |
| "paddsw "XMMS", %%xmm3 \n\t" \ |
| MOV_32_ONLY" (%0), "TAN1" \n\t" \ |
| "psraw $6, %%xmm5 \n\t" \ |
| "psraw $6, "REG0" \n\t" \ |
| "psraw $6, "TAN3" \n\t" \ |
| "psraw $6, %%xmm3 \n\t" \ |
| "movdqa "TAN3", 1*16("dct") \n\t" \ |
| "movdqa %%xmm3, 2*16("dct") \n\t" \ |
| "movdqa "REG0", 5*16("dct") \n\t" \ |
| "movdqa %%xmm5, 6*16("dct") \n\t" \ |
| "movdqa %%xmm7, %%xmm0 \n\t" \ |
| "movdqa "REG4", %%xmm4 \n\t" \ |
| "psubsw %%xmm1, %%xmm7 \n\t" \ |
| "psubsw "TAN1", "REG4" \n\t" \ |
| "paddsw %%xmm0, %%xmm1 \n\t" \ |
| "paddsw %%xmm4, "TAN1" \n\t" \ |
| "psraw $6, %%xmm1 \n\t" \ |
| "psraw $6, %%xmm7 \n\t" \ |
| "psraw $6, "TAN1" \n\t" \ |
| "psraw $6, "REG4" \n\t" \ |
| "movdqa %%xmm1, ("dct") \n\t" \ |
| "movdqa "TAN1", 3*16("dct") \n\t" \ |
| "movdqa "REG4", 4*16("dct") \n\t" \ |
| "movdqa %%xmm7, 7*16("dct") \n\t" |
| |
| ///IDCT pass on columns, assuming rows 4-7 are zero. |
| #define iLLM_PASS_SPARSE(dct) \ |
| "pmulhw %%xmm4, "TAN3" \n\t" \ |
| "paddsw %%xmm4, "TAN3" \n\t" \ |
| "movdqa %%xmm6, %%xmm3 \n\t" \ |
| "pmulhw %%xmm6, "TAN1" \n\t" \ |
| "movdqa %%xmm4, %%xmm1 \n\t" \ |
| "psubsw %%xmm1, %%xmm3 \n\t" \ |
| "paddsw %%xmm6, %%xmm1 \n\t" \ |
| "movdqa "TAN1", %%xmm6 \n\t" \ |
| "psubsw "TAN3", "TAN1" \n\t" \ |
| "paddsw %%xmm6, "TAN3" \n\t" \ |
| "movdqa %%xmm3, %%xmm6 \n\t" \ |
| "psubsw "TAN3", %%xmm3 \n\t" \ |
| "paddsw %%xmm6, "TAN3" \n\t" \ |
| "movdqa "MANGLE(sqrt2)", %%xmm4 \n\t" \ |
| "pmulhw %%xmm4, %%xmm3 \n\t" \ |
| "pmulhw %%xmm4, "TAN3" \n\t" \ |
| "paddsw "TAN3", "TAN3" \n\t" \ |
| "paddsw %%xmm3, %%xmm3 \n\t" \ |
| "movdqa "MANGLE(tan2)", %%xmm5 \n\t" \ |
| MOV_32_ONLY ROW2", "SREG2" \n\t" \ |
| "pmulhw "SREG2", %%xmm5 \n\t" \ |
| MOV_32_ONLY ROW0", "REG0" \n\t" \ |
| "movdqa "REG0", %%xmm6 \n\t" \ |
| "psubsw "SREG2", %%xmm6 \n\t" \ |
| "paddsw "REG0", "SREG2" \n\t" \ |
| MOV_32_ONLY" "TAN1", (%0) \n\t" \ |
| "movdqa "REG0", "XMMS" \n\t" \ |
| "psubsw %%xmm5, "REG0" \n\t" \ |
| "paddsw "XMMS", %%xmm5 \n\t" \ |
| "movdqa %%xmm5, "XMMS" \n\t" \ |
| "psubsw "TAN3", %%xmm5 \n\t" \ |
| "paddsw "XMMS", "TAN3" \n\t" \ |
| "movdqa "REG0", "XMMS" \n\t" \ |
| "psubsw %%xmm3, "REG0" \n\t" \ |
| "paddsw "XMMS", %%xmm3 \n\t" \ |
| MOV_32_ONLY" (%0), "TAN1" \n\t" \ |
| "psraw $6, %%xmm5 \n\t" \ |
| "psraw $6, "REG0" \n\t" \ |
| "psraw $6, "TAN3" \n\t" \ |
| "psraw $6, %%xmm3 \n\t" \ |
| "movdqa "TAN3", 1*16("dct") \n\t" \ |
| "movdqa %%xmm3, 2*16("dct") \n\t" \ |
| "movdqa "REG0", 5*16("dct") \n\t" \ |
| "movdqa %%xmm5, 6*16("dct") \n\t" \ |
| "movdqa "SREG2", %%xmm0 \n\t" \ |
| "movdqa %%xmm6, %%xmm4 \n\t" \ |
| "psubsw %%xmm1, "SREG2" \n\t" \ |
| "psubsw "TAN1", %%xmm6 \n\t" \ |
| "paddsw %%xmm0, %%xmm1 \n\t" \ |
| "paddsw %%xmm4, "TAN1" \n\t" \ |
| "psraw $6, %%xmm1 \n\t" \ |
| "psraw $6, "SREG2" \n\t" \ |
| "psraw $6, "TAN1" \n\t" \ |
| "psraw $6, %%xmm6 \n\t" \ |
| "movdqa %%xmm1, ("dct") \n\t" \ |
| "movdqa "TAN1", 3*16("dct") \n\t" \ |
| "movdqa %%xmm6, 4*16("dct") \n\t" \ |
| "movdqa "SREG2", 7*16("dct") \n\t" |
| |
| inline void ff_idct_xvid_sse2(short *block) |
| { |
| __asm__ volatile( |
| "movq "MANGLE(m127)", %%mm0 \n\t" |
| iMTX_MULT("(%0)", MANGLE(iTab1), ROUND(walkenIdctRounders), PUT_EVEN(ROW0)) |
| iMTX_MULT("1*16(%0)", MANGLE(iTab2), ROUND(walkenIdctRounders+1*16), PUT_ODD(ROW1)) |
| iMTX_MULT("2*16(%0)", MANGLE(iTab3), ROUND(walkenIdctRounders+2*16), PUT_EVEN(ROW2)) |
| |
| TEST_TWO_ROWS("3*16(%0)", "4*16(%0)", "%%eax", "%%ecx", CLEAR_ODD(ROW3), CLEAR_EVEN(ROW4)) |
| JZ("%%eax", "1f") |
| iMTX_MULT("3*16(%0)", MANGLE(iTab4), ROUND(walkenIdctRounders+3*16), PUT_ODD(ROW3)) |
| |
| TEST_TWO_ROWS("5*16(%0)", "6*16(%0)", "%%eax", "%%edx", CLEAR_ODD(ROW5), CLEAR_EVEN(ROW6)) |
| TEST_ONE_ROW("7*16(%0)", "%%esi", CLEAR_ODD(ROW7)) |
| iLLM_HEAD |
| ASMALIGN(4) |
| JNZ("%%ecx", "2f") |
| JNZ("%%eax", "3f") |
| JNZ("%%edx", "4f") |
| JNZ("%%esi", "5f") |
| iLLM_PASS_SPARSE("%0") |
| "jmp 6f \n\t" |
| "2: \n\t" |
| iMTX_MULT("4*16(%0)", MANGLE(iTab1), "#", PUT_EVEN(ROW4)) |
| "3: \n\t" |
| iMTX_MULT("5*16(%0)", MANGLE(iTab4), ROUND(walkenIdctRounders+4*16), PUT_ODD(ROW5)) |
| JZ("%%edx", "1f") |
| "4: \n\t" |
| iMTX_MULT("6*16(%0)", MANGLE(iTab3), ROUND(walkenIdctRounders+5*16), PUT_EVEN(ROW6)) |
| JZ("%%esi", "1f") |
| "5: \n\t" |
| iMTX_MULT("7*16(%0)", MANGLE(iTab2), ROUND(walkenIdctRounders+5*16), PUT_ODD(ROW7)) |
| #if !ARCH_X86_64 |
| iLLM_HEAD |
| #endif |
| iLLM_PASS("%0") |
| "6: \n\t" |
| : "+r"(block) |
| : |
| : "%eax", "%ecx", "%edx", "%esi", "memory"); |
| } |
| |
| void ff_idct_xvid_sse2_put(uint8_t *dest, int line_size, short *block) |
| { |
| ff_idct_xvid_sse2(block); |
| put_pixels_clamped_mmx(block, dest, line_size); |
| } |
| |
| void ff_idct_xvid_sse2_add(uint8_t *dest, int line_size, short *block) |
| { |
| ff_idct_xvid_sse2(block); |
| add_pixels_clamped_mmx(block, dest, line_size); |
| } |
