| ;***************************************************************************** |
| ;* x86-optimized AC-3 DSP functions |
| ;* Copyright (c) 2011 Justin Ruggles |
| ;* |
| ;* This file is part of FFmpeg. |
| ;* |
| ;* 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 "libavutil/x86/x86util.asm" |
| |
| SECTION_RODATA |
| |
| ; 16777216.0f - used in ff_float_to_fixed24() |
| pf_1_24: times 4 dd 0x4B800000 |
| |
| ; used in ff_ac3_compute_mantissa_size() |
| cextern ac3_bap_bits |
| pw_bap_mul1: dw 21846, 21846, 0, 32768, 21846, 21846, 0, 32768 |
| pw_bap_mul2: dw 5, 7, 0, 7, 5, 7, 0, 7 |
| |
| ; used in ff_ac3_extract_exponents() |
| cextern pd_1 |
| pd_151: times 4 dd 151 |
| |
| SECTION .text |
| |
| ;----------------------------------------------------------------------------- |
| ; void ff_ac3_exponent_min(uint8_t *exp, int num_reuse_blocks, int nb_coefs) |
| ;----------------------------------------------------------------------------- |
| |
| %macro AC3_EXPONENT_MIN 0 |
| cglobal ac3_exponent_min, 3, 4, 2, exp, reuse_blks, expn, offset |
| shl reuse_blksq, 8 |
| jz .end |
| LOOP_ALIGN |
| .nextexp: |
| mov offsetq, reuse_blksq |
| mova m0, [expq+offsetq] |
| sub offsetq, 256 |
| LOOP_ALIGN |
| .nextblk: |
| PMINUB m0, [expq+offsetq], m1 |
| sub offsetq, 256 |
| jae .nextblk |
| mova [expq], m0 |
| add expq, mmsize |
| sub expnq, mmsize |
| jg .nextexp |
| .end: |
| REP_RET |
| %endmacro |
| |
| %define LOOP_ALIGN |
| INIT_MMX mmx |
| AC3_EXPONENT_MIN |
| %if HAVE_MMXEXT_EXTERNAL |
| %define LOOP_ALIGN ALIGN 16 |
| INIT_MMX mmxext |
| AC3_EXPONENT_MIN |
| %endif |
| %if HAVE_SSE2_EXTERNAL |
| INIT_XMM sse2 |
| AC3_EXPONENT_MIN |
| %endif |
| %undef LOOP_ALIGN |
| |
| ;----------------------------------------------------------------------------- |
| ; void ff_float_to_fixed24(int32_t *dst, const float *src, unsigned int len) |
| ;----------------------------------------------------------------------------- |
| |
| ; The 3DNow! version is not bit-identical because pf2id uses truncation rather |
| ; than round-to-nearest. |
| INIT_MMX 3dnow |
| cglobal float_to_fixed24, 3, 3, 0, dst, src, len |
| movq m0, [pf_1_24] |
| .loop: |
| movq m1, [srcq ] |
| movq m2, [srcq+8 ] |
| movq m3, [srcq+16] |
| movq m4, [srcq+24] |
| pfmul m1, m0 |
| pfmul m2, m0 |
| pfmul m3, m0 |
| pfmul m4, m0 |
| pf2id m1, m1 |
| pf2id m2, m2 |
| pf2id m3, m3 |
| pf2id m4, m4 |
| movq [dstq ], m1 |
| movq [dstq+8 ], m2 |
| movq [dstq+16], m3 |
| movq [dstq+24], m4 |
| add srcq, 32 |
| add dstq, 32 |
| sub lend, 8 |
| ja .loop |
| femms |
| RET |
| |
| INIT_XMM sse |
| cglobal float_to_fixed24, 3, 3, 3, dst, src, len |
| movaps m0, [pf_1_24] |
| .loop: |
| movaps m1, [srcq ] |
| movaps m2, [srcq+16] |
| mulps m1, m0 |
| mulps m2, m0 |
| cvtps2pi mm0, m1 |
| movhlps m1, m1 |
| cvtps2pi mm1, m1 |
| cvtps2pi mm2, m2 |
| movhlps m2, m2 |
| cvtps2pi mm3, m2 |
| movq [dstq ], mm0 |
| movq [dstq+ 8], mm1 |
| movq [dstq+16], mm2 |
| movq [dstq+24], mm3 |
| add srcq, 32 |
| add dstq, 32 |
| sub lend, 8 |
| ja .loop |
| emms |
| RET |
| |
| INIT_XMM sse2 |
| cglobal float_to_fixed24, 3, 3, 9, dst, src, len |
| movaps m0, [pf_1_24] |
| .loop: |
| movaps m1, [srcq ] |
| movaps m2, [srcq+16 ] |
| movaps m3, [srcq+32 ] |
| movaps m4, [srcq+48 ] |
| %ifdef m8 |
| movaps m5, [srcq+64 ] |
| movaps m6, [srcq+80 ] |
| movaps m7, [srcq+96 ] |
| movaps m8, [srcq+112] |
| %endif |
| mulps m1, m0 |
| mulps m2, m0 |
| mulps m3, m0 |
| mulps m4, m0 |
| %ifdef m8 |
| mulps m5, m0 |
| mulps m6, m0 |
| mulps m7, m0 |
| mulps m8, m0 |
| %endif |
| cvtps2dq m1, m1 |
| cvtps2dq m2, m2 |
| cvtps2dq m3, m3 |
| cvtps2dq m4, m4 |
| %ifdef m8 |
| cvtps2dq m5, m5 |
| cvtps2dq m6, m6 |
| cvtps2dq m7, m7 |
| cvtps2dq m8, m8 |
| %endif |
| movdqa [dstq ], m1 |
| movdqa [dstq+16 ], m2 |
| movdqa [dstq+32 ], m3 |
| movdqa [dstq+48 ], m4 |
| %ifdef m8 |
| movdqa [dstq+64 ], m5 |
| movdqa [dstq+80 ], m6 |
| movdqa [dstq+96 ], m7 |
| movdqa [dstq+112], m8 |
| add srcq, 128 |
| add dstq, 128 |
| sub lenq, 32 |
| %else |
| add srcq, 64 |
| add dstq, 64 |
| sub lenq, 16 |
| %endif |
| ja .loop |
| REP_RET |
| |
| ;------------------------------------------------------------------------------ |
| ; int ff_ac3_compute_mantissa_size(uint16_t mant_cnt[6][16]) |
| ;------------------------------------------------------------------------------ |
| |
| %macro PHADDD4 2 ; xmm src, xmm tmp |
| movhlps %2, %1 |
| paddd %1, %2 |
| pshufd %2, %1, 0x1 |
| paddd %1, %2 |
| %endmacro |
| |
| INIT_XMM sse2 |
| cglobal ac3_compute_mantissa_size, 1, 2, 4, mant_cnt, sum |
| movdqa m0, [mant_cntq ] |
| movdqa m1, [mant_cntq+ 1*16] |
| paddw m0, [mant_cntq+ 2*16] |
| paddw m1, [mant_cntq+ 3*16] |
| paddw m0, [mant_cntq+ 4*16] |
| paddw m1, [mant_cntq+ 5*16] |
| paddw m0, [mant_cntq+ 6*16] |
| paddw m1, [mant_cntq+ 7*16] |
| paddw m0, [mant_cntq+ 8*16] |
| paddw m1, [mant_cntq+ 9*16] |
| paddw m0, [mant_cntq+10*16] |
| paddw m1, [mant_cntq+11*16] |
| pmaddwd m0, [ac3_bap_bits ] |
| pmaddwd m1, [ac3_bap_bits+16] |
| paddd m0, m1 |
| PHADDD4 m0, m1 |
| movd sumd, m0 |
| movdqa m3, [pw_bap_mul1] |
| movhpd m0, [mant_cntq +2] |
| movlpd m0, [mant_cntq+1*32+2] |
| movhpd m1, [mant_cntq+2*32+2] |
| movlpd m1, [mant_cntq+3*32+2] |
| movhpd m2, [mant_cntq+4*32+2] |
| movlpd m2, [mant_cntq+5*32+2] |
| pmulhuw m0, m3 |
| pmulhuw m1, m3 |
| pmulhuw m2, m3 |
| paddusw m0, m1 |
| paddusw m0, m2 |
| pmaddwd m0, [pw_bap_mul2] |
| PHADDD4 m0, m1 |
| movd eax, m0 |
| add eax, sumd |
| RET |
| |
| ;------------------------------------------------------------------------------ |
| ; void ff_ac3_extract_exponents(uint8_t *exp, int32_t *coef, int nb_coefs) |
| ;------------------------------------------------------------------------------ |
| |
| %macro PABSD 1-2 ; src/dst, unused |
| %if cpuflag(ssse3) |
| pabsd %1, %1 |
| %else ; src/dst, tmp |
| pxor %2, %2 |
| pcmpgtd %2, %1 |
| pxor %1, %2 |
| psubd %1, %2 |
| %endif |
| %endmacro |
| |
| %macro AC3_EXTRACT_EXPONENTS 0 |
| cglobal ac3_extract_exponents, 3, 3, 4, exp, coef, len |
| add expq, lenq |
| lea coefq, [coefq+4*lenq] |
| neg lenq |
| mova m2, [pd_1] |
| mova m3, [pd_151] |
| .loop: |
| ; move 4 32-bit coefs to xmm0 |
| mova m0, [coefq+4*lenq] |
| ; absolute value |
| PABSD m0, m1 |
| ; convert to float and extract exponents |
| pslld m0, 1 |
| por m0, m2 |
| cvtdq2ps m1, m0 |
| psrld m1, 23 |
| mova m0, m3 |
| psubd m0, m1 |
| ; move the lowest byte in each of 4 dwords to the low dword |
| ; NOTE: We cannot just extract the low bytes with pshufb because the dword |
| ; result for 16777215 is -1 due to float inaccuracy. Using packuswb |
| ; clips this to 0, which is the correct exponent. |
| packssdw m0, m0 |
| packuswb m0, m0 |
| movd [expq+lenq], m0 |
| |
| add lenq, 4 |
| jl .loop |
| REP_RET |
| %endmacro |
| |
| %if HAVE_SSE2_EXTERNAL |
| INIT_XMM sse2 |
| AC3_EXTRACT_EXPONENTS |
| %endif |
| %if HAVE_SSSE3_EXTERNAL |
| INIT_XMM ssse3 |
| AC3_EXTRACT_EXPONENTS |
| %endif |
