/* * Copyright (C) 2001-2003 Michael Niedermayer <michaelni@gmx.at> * * 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 "../swscale_internal.h" #include "libavutil/x86/asm.h" #include "libavutil/x86/cpu.h" #define RET 0xC3 // near return opcode for x86 #define PREFETCH "prefetchnta" #if HAVE_INLINE_ASM av_cold int ff_init_hscaler_mmxext(int dstW, int xInc, uint8_t *filterCode, int16_t *filter, int32_t *filterPos, int numSplits) { uint8_t *fragmentA; x86_reg imm8OfPShufW1A; x86_reg imm8OfPShufW2A; x86_reg fragmentLengthA; uint8_t *fragmentB; x86_reg imm8OfPShufW1B; x86_reg imm8OfPShufW2B; x86_reg fragmentLengthB; int fragmentPos; int xpos, i; // create an optimized horizontal scaling routine /* This scaler is made of runtime-generated MMXEXT code using specially tuned * pshufw instructions. For every four output pixels, if four input pixels * are enough for the fast bilinear scaling, then a chunk of fragmentB is * used. If five input pixels are needed, then a chunk of fragmentA is used. */ // code fragment __asm__ volatile ( "jmp 9f \n\t" // Begin "0: \n\t" "movq (%%"REG_d", %%"REG_a"), %%mm3 \n\t" "movd (%%"REG_c", %%"REG_S"), %%mm0 \n\t" "movd 1(%%"REG_c", %%"REG_S"), %%mm1 \n\t" "punpcklbw %%mm7, %%mm1 \n\t" "punpcklbw %%mm7, %%mm0 \n\t" "pshufw $0xFF, %%mm1, %%mm1 \n\t" "1: \n\t" "pshufw $0xFF, %%mm0, %%mm0 \n\t" "2: \n\t" "psubw %%mm1, %%mm0 \n\t" "movl 8(%%"REG_b", %%"REG_a"), %%esi \n\t" "pmullw %%mm3, %%mm0 \n\t" "psllw $7, %%mm1 \n\t" "paddw %%mm1, %%mm0 \n\t" "movq %%mm0, (%%"REG_D", %%"REG_a") \n\t" "add $8, %%"REG_a" \n\t" // End "9: \n\t" "lea " LOCAL_MANGLE(0b) ", %0 \n\t" "lea " LOCAL_MANGLE(1b) ", %1 \n\t" "lea " LOCAL_MANGLE(2b) ", %2 \n\t" "dec %1 \n\t" "dec %2 \n\t" "sub %0, %1 \n\t" "sub %0, %2 \n\t" "lea " LOCAL_MANGLE(9b) ", %3 \n\t" "sub %0, %3 \n\t" : "=r" (fragmentA), "=r" (imm8OfPShufW1A), "=r" (imm8OfPShufW2A), "=r" (fragmentLengthA) ); __asm__ volatile ( "jmp 9f \n\t" // Begin "0: \n\t" "movq (%%"REG_d", %%"REG_a"), %%mm3 \n\t" "movd (%%"REG_c", %%"REG_S"), %%mm0 \n\t" "punpcklbw %%mm7, %%mm0 \n\t" "pshufw $0xFF, %%mm0, %%mm1 \n\t" "1: \n\t" "pshufw $0xFF, %%mm0, %%mm0 \n\t" "2: \n\t" "psubw %%mm1, %%mm0 \n\t" "movl 8(%%"REG_b", %%"REG_a"), %%esi \n\t" "pmullw %%mm3, %%mm0 \n\t" "psllw $7, %%mm1 \n\t" "paddw %%mm1, %%mm0 \n\t" "movq %%mm0, (%%"REG_D", %%"REG_a") \n\t" "add $8, %%"REG_a" \n\t" // End "9: \n\t" "lea " LOCAL_MANGLE(0b) ", %0 \n\t" "lea " LOCAL_MANGLE(1b) ", %1 \n\t" "lea " LOCAL_MANGLE(2b) ", %2 \n\t" "dec %1 \n\t" "dec %2 \n\t" "sub %0, %1 \n\t" "sub %0, %2 \n\t" "lea " LOCAL_MANGLE(9b) ", %3 \n\t" "sub %0, %3 \n\t" : "=r" (fragmentB), "=r" (imm8OfPShufW1B), "=r" (imm8OfPShufW2B), "=r" (fragmentLengthB) ); xpos = 0; // lumXInc/2 - 0x8000; // difference between pixel centers fragmentPos = 0; for (i = 0; i < dstW / numSplits; i++) { int xx = xpos >> 16; if ((i & 3) == 0) { int a = 0; int b = ((xpos + xInc) >> 16) - xx; int c = ((xpos + xInc * 2) >> 16) - xx; int d = ((xpos + xInc * 3) >> 16) - xx; int inc = (d + 1 < 4); uint8_t *fragment = inc ? fragmentB : fragmentA; x86_reg imm8OfPShufW1 = inc ? imm8OfPShufW1B : imm8OfPShufW1A; x86_reg imm8OfPShufW2 = inc ? imm8OfPShufW2B : imm8OfPShufW2A; x86_reg fragmentLength = inc ? fragmentLengthB : fragmentLengthA; int maxShift = 3 - (d + inc); int shift = 0; if (filterCode) { filter[i] = ((xpos & 0xFFFF) ^ 0xFFFF) >> 9; filter[i + 1] = (((xpos + xInc) & 0xFFFF) ^ 0xFFFF) >> 9; filter[i + 2] = (((xpos + xInc * 2) & 0xFFFF) ^ 0xFFFF) >> 9; filter[i + 3] = (((xpos + xInc * 3) & 0xFFFF) ^ 0xFFFF) >> 9; filterPos[i / 2] = xx; memcpy(filterCode + fragmentPos, fragment, fragmentLength); filterCode[fragmentPos + imm8OfPShufW1] = (a + inc) | ((b + inc) << 2) | ((c + inc) << 4) | ((d + inc) << 6); filterCode[fragmentPos + imm8OfPShufW2] = a | (b << 2) | (c << 4) | (d << 6); if (i + 4 - inc >= dstW) shift = maxShift; // avoid overread else if ((filterPos[i / 2] & 3) <= maxShift) shift = filterPos[i / 2] & 3; // align if (shift && i >= shift) { filterCode[fragmentPos + imm8OfPShufW1] += 0x55 * shift; filterCode[fragmentPos + imm8OfPShufW2] += 0x55 * shift; filterPos[i / 2] -= shift; } } fragmentPos += fragmentLength; if (filterCode) filterCode[fragmentPos] = RET; } xpos += xInc; } if (filterCode) filterPos[((i / 2) + 1) & (~1)] = xpos >> 16; // needed to jump to the next part return fragmentPos + 1; } void ff_hyscale_fast_mmxext(SwsContext *c, int16_t *dst, int dstWidth, const uint8_t *src, int srcW, int xInc) { int32_t *filterPos = c->hLumFilterPos; int16_t *filter = c->hLumFilter; void *mmxextFilterCode = c->lumMmxextFilterCode; int i; #if ARCH_X86_64 uint64_t retsave; #else #if defined(PIC) uint64_t ebxsave; #endif #endif __asm__ volatile( #if ARCH_X86_64 "mov -8(%%rsp), %%"REG_a" \n\t" "mov %%"REG_a", %5 \n\t" // retsave #else #if defined(PIC) "mov %%"REG_b", %5 \n\t" // ebxsave #endif #endif "pxor %%mm7, %%mm7 \n\t" "mov %0, %%"REG_c" \n\t" "mov %1, %%"REG_D" \n\t" "mov %2, %%"REG_d" \n\t" "mov %3, %%"REG_b" \n\t" "xor %%"REG_a", %%"REG_a" \n\t" // i PREFETCH" (%%"REG_c") \n\t" PREFETCH" 32(%%"REG_c") \n\t" PREFETCH" 64(%%"REG_c") \n\t" #if ARCH_X86_64 #define CALL_MMXEXT_FILTER_CODE \ "movl (%%"REG_b"), %%esi \n\t"\ "call *%4 \n\t"\ "movl (%%"REG_b", %%"REG_a"), %%esi \n\t"\ "add %%"REG_S", %%"REG_c" \n\t"\ "add %%"REG_a", %%"REG_D" \n\t"\ "xor %%"REG_a", %%"REG_a" \n\t"\ #else #define CALL_MMXEXT_FILTER_CODE \ "movl (%%"REG_b"), %%esi \n\t"\ "call *%4 \n\t"\ "addl (%%"REG_b", %%"REG_a"), %%"REG_c" \n\t"\ "add %%"REG_a", %%"REG_D" \n\t"\ "xor %%"REG_a", %%"REG_a" \n\t"\ #endif /* ARCH_X86_64 */ CALL_MMXEXT_FILTER_CODE CALL_MMXEXT_FILTER_CODE CALL_MMXEXT_FILTER_CODE CALL_MMXEXT_FILTER_CODE CALL_MMXEXT_FILTER_CODE CALL_MMXEXT_FILTER_CODE CALL_MMXEXT_FILTER_CODE CALL_MMXEXT_FILTER_CODE #if ARCH_X86_64 "mov %5, %%"REG_a" \n\t" "mov %%"REG_a", -8(%%rsp) \n\t" #else #if defined(PIC) "mov %5, %%"REG_b" \n\t" #endif #endif :: "m" (src), "m" (dst), "m" (filter), "m" (filterPos), "m" (mmxextFilterCode) #if ARCH_X86_64 ,"m"(retsave) #else #if defined(PIC) ,"m" (ebxsave) #endif #endif : "%"REG_a, "%"REG_c, "%"REG_d, "%"REG_S, "%"REG_D #if ARCH_X86_64 || !defined(PIC) ,"%"REG_b #endif ); for (i=dstWidth-1; (i*xInc)>>16 >=srcW-1; i--) dst[i] = src[srcW-1]*128; } void ff_hcscale_fast_mmxext(SwsContext *c, int16_t *dst1, int16_t *dst2, int dstWidth, const uint8_t *src1, const uint8_t *src2, int srcW, int xInc) { int32_t *filterPos = c->hChrFilterPos; int16_t *filter = c->hChrFilter; void *mmxextFilterCode = c->chrMmxextFilterCode; int i; #if ARCH_X86_64 DECLARE_ALIGNED(8, uint64_t, retsave); #else #if defined(PIC) DECLARE_ALIGNED(8, uint64_t, ebxsave); #endif #endif __asm__ volatile( #if ARCH_X86_64 "mov -8(%%rsp), %%"REG_a" \n\t" "mov %%"REG_a", %7 \n\t" // retsave #else #if defined(PIC) "mov %%"REG_b", %7 \n\t" // ebxsave #endif #endif "pxor %%mm7, %%mm7 \n\t" "mov %0, %%"REG_c" \n\t" "mov %1, %%"REG_D" \n\t" "mov %2, %%"REG_d" \n\t" "mov %3, %%"REG_b" \n\t" "xor %%"REG_a", %%"REG_a" \n\t" // i PREFETCH" (%%"REG_c") \n\t" PREFETCH" 32(%%"REG_c") \n\t" PREFETCH" 64(%%"REG_c") \n\t" CALL_MMXEXT_FILTER_CODE CALL_MMXEXT_FILTER_CODE CALL_MMXEXT_FILTER_CODE CALL_MMXEXT_FILTER_CODE "xor %%"REG_a", %%"REG_a" \n\t" // i "mov %5, %%"REG_c" \n\t" // src2 "mov %6, %%"REG_D" \n\t" // dst2 PREFETCH" (%%"REG_c") \n\t" PREFETCH" 32(%%"REG_c") \n\t" PREFETCH" 64(%%"REG_c") \n\t" CALL_MMXEXT_FILTER_CODE CALL_MMXEXT_FILTER_CODE CALL_MMXEXT_FILTER_CODE CALL_MMXEXT_FILTER_CODE #if ARCH_X86_64 "mov %7, %%"REG_a" \n\t" "mov %%"REG_a", -8(%%rsp) \n\t" #else #if defined(PIC) "mov %7, %%"REG_b" \n\t" #endif #endif :: "m" (src1), "m" (dst1), "m" (filter), "m" (filterPos), "m" (mmxextFilterCode), "m" (src2), "m"(dst2) #if ARCH_X86_64 ,"m"(retsave) #else #if defined(PIC) ,"m" (ebxsave) #endif #endif : "%"REG_a, "%"REG_c, "%"REG_d, "%"REG_S, "%"REG_D #if ARCH_X86_64 || !defined(PIC) ,"%"REG_b #endif ); for (i=dstWidth-1; (i*xInc)>>16 >=srcW-1; i--) { dst1[i] = src1[srcW-1]*128; dst2[i] = src2[srcW-1]*128; } } #endif //HAVE_INLINE_ASM