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168 lines
6.2 KiB
168 lines
6.2 KiB
/* |
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* SIMD-optimized IDCT-related routines |
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* Copyright (c) 2000, 2001 Fabrice Bellard |
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* Copyright (c) 2002-2004 Michael Niedermayer <michaelni@gmx.at> |
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* |
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* MMX optimization by Nick Kurshev <nickols_k@mail.ru> |
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* |
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* This file is part of Libav. |
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* |
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* Libav is free software; you can redistribute it and/or |
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* modify it under the terms of the GNU Lesser General Public |
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* License as published by the Free Software Foundation; either |
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* version 2.1 of the License, or (at your option) any later version. |
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* |
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* Libav is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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* Lesser General Public License for more details. |
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* |
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* You should have received a copy of the GNU Lesser General Public |
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* License along with Libav; if not, write to the Free Software |
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
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*/ |
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#include "config.h" |
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#include "libavutil/cpu.h" |
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#include "libavutil/x86/asm.h" |
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#include "idctdsp.h" |
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#include "inline_asm.h" |
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#if HAVE_INLINE_ASM |
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void ff_put_pixels_clamped_mmx(const int16_t *block, uint8_t *pixels, |
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ptrdiff_t line_size) |
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{ |
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const int16_t *p; |
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uint8_t *pix; |
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|
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/* read the pixels */ |
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p = block; |
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pix = pixels; |
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/* unrolled loop */ |
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__asm__ volatile ( |
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"movq (%3), %%mm0 \n\t" |
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"movq 8(%3), %%mm1 \n\t" |
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"movq 16(%3), %%mm2 \n\t" |
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"movq 24(%3), %%mm3 \n\t" |
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"movq 32(%3), %%mm4 \n\t" |
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"movq 40(%3), %%mm5 \n\t" |
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"movq 48(%3), %%mm6 \n\t" |
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"movq 56(%3), %%mm7 \n\t" |
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"packuswb %%mm1, %%mm0 \n\t" |
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"packuswb %%mm3, %%mm2 \n\t" |
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"packuswb %%mm5, %%mm4 \n\t" |
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"packuswb %%mm7, %%mm6 \n\t" |
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"movq %%mm0, (%0) \n\t" |
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"movq %%mm2, (%0, %1) \n\t" |
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"movq %%mm4, (%0, %1, 2) \n\t" |
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"movq %%mm6, (%0, %2) \n\t" |
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:: "r" (pix), "r" ((x86_reg) line_size), "r" ((x86_reg) line_size * 3), |
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"r" (p) |
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: "memory"); |
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pix += line_size * 4; |
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p += 32; |
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// if here would be an exact copy of the code above |
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// compiler would generate some very strange code |
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// thus using "r" |
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__asm__ volatile ( |
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"movq (%3), %%mm0 \n\t" |
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"movq 8(%3), %%mm1 \n\t" |
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"movq 16(%3), %%mm2 \n\t" |
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"movq 24(%3), %%mm3 \n\t" |
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"movq 32(%3), %%mm4 \n\t" |
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"movq 40(%3), %%mm5 \n\t" |
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"movq 48(%3), %%mm6 \n\t" |
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"movq 56(%3), %%mm7 \n\t" |
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"packuswb %%mm1, %%mm0 \n\t" |
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"packuswb %%mm3, %%mm2 \n\t" |
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"packuswb %%mm5, %%mm4 \n\t" |
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"packuswb %%mm7, %%mm6 \n\t" |
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"movq %%mm0, (%0) \n\t" |
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"movq %%mm2, (%0, %1) \n\t" |
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"movq %%mm4, (%0, %1, 2) \n\t" |
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"movq %%mm6, (%0, %2) \n\t" |
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:: "r" (pix), "r" ((x86_reg) line_size), "r" ((x86_reg) line_size * 3), |
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"r" (p) |
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: "memory"); |
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} |
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#define put_signed_pixels_clamped_mmx_half(off) \ |
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"movq "#off"(%2), %%mm1 \n\t" \ |
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"movq 16 + "#off"(%2), %%mm2 \n\t" \ |
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"movq 32 + "#off"(%2), %%mm3 \n\t" \ |
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"movq 48 + "#off"(%2), %%mm4 \n\t" \ |
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"packsswb 8 + "#off"(%2), %%mm1 \n\t" \ |
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"packsswb 24 + "#off"(%2), %%mm2 \n\t" \ |
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"packsswb 40 + "#off"(%2), %%mm3 \n\t" \ |
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"packsswb 56 + "#off"(%2), %%mm4 \n\t" \ |
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"paddb %%mm0, %%mm1 \n\t" \ |
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"paddb %%mm0, %%mm2 \n\t" \ |
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"paddb %%mm0, %%mm3 \n\t" \ |
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"paddb %%mm0, %%mm4 \n\t" \ |
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"movq %%mm1, (%0) \n\t" \ |
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"movq %%mm2, (%0, %3) \n\t" \ |
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"movq %%mm3, (%0, %3, 2) \n\t" \ |
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"movq %%mm4, (%0, %1) \n\t" |
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void ff_put_signed_pixels_clamped_mmx(const int16_t *block, uint8_t *pixels, |
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ptrdiff_t line_size) |
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{ |
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x86_reg line_skip = line_size; |
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x86_reg line_skip3; |
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__asm__ volatile ( |
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"movq "MANGLE(ff_pb_80)", %%mm0 \n\t" |
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"lea (%3, %3, 2), %1 \n\t" |
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put_signed_pixels_clamped_mmx_half(0) |
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"lea (%0, %3, 4), %0 \n\t" |
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put_signed_pixels_clamped_mmx_half(64) |
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: "+&r" (pixels), "=&r" (line_skip3) |
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: "r" (block), "r" (line_skip) |
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: "memory"); |
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} |
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void ff_add_pixels_clamped_mmx(const int16_t *block, uint8_t *pixels, |
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ptrdiff_t line_size) |
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{ |
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const int16_t *p; |
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uint8_t *pix; |
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int i; |
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/* read the pixels */ |
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p = block; |
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pix = pixels; |
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MOVQ_ZERO(mm7); |
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i = 4; |
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do { |
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__asm__ volatile ( |
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"movq (%2), %%mm0 \n\t" |
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"movq 8(%2), %%mm1 \n\t" |
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"movq 16(%2), %%mm2 \n\t" |
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"movq 24(%2), %%mm3 \n\t" |
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"movq %0, %%mm4 \n\t" |
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"movq %1, %%mm6 \n\t" |
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"movq %%mm4, %%mm5 \n\t" |
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"punpcklbw %%mm7, %%mm4 \n\t" |
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"punpckhbw %%mm7, %%mm5 \n\t" |
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"paddsw %%mm4, %%mm0 \n\t" |
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"paddsw %%mm5, %%mm1 \n\t" |
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"movq %%mm6, %%mm5 \n\t" |
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"punpcklbw %%mm7, %%mm6 \n\t" |
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"punpckhbw %%mm7, %%mm5 \n\t" |
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"paddsw %%mm6, %%mm2 \n\t" |
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"paddsw %%mm5, %%mm3 \n\t" |
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"packuswb %%mm1, %%mm0 \n\t" |
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"packuswb %%mm3, %%mm2 \n\t" |
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"movq %%mm0, %0 \n\t" |
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"movq %%mm2, %1 \n\t" |
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: "+m" (*pix), "+m" (*(pix + line_size)) |
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: "r" (p) |
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: "memory"); |
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pix += line_size * 2; |
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p += 16; |
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} while (--i); |
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} |
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#endif /* HAVE_INLINE_ASM */
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