mirror of https://github.com/mpv-player/mpv
425 lines
13 KiB
C
425 lines
13 KiB
C
/*
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* Discrete Cosine Tansform (DCT) for SSE
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* Copyright (c) 2006 Zuxy MENG <zuxy.meng@gmail.com>
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* based upon code from mp3lib/dct64.c, mp3lib/dct64_altivec.c
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* and mp3lib/dct64_mmx.c
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*/
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#include <libavutil/mem.h>
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typedef float real;
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extern float __attribute__((aligned(16))) costab_mmx[];
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static const int ppnn[4] __attribute__((aligned(16))) =
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{ 0, 0, 1 << 31, 1 << 31 };
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static const int pnpn[4] __attribute__((aligned(16))) =
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{ 0, 1 << 31, 0, 1 << 31 };
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static const int nnnn[4] __attribute__((aligned(16))) =
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{ 1 << 31, 1 << 31, 1 << 31, 1 << 31 };
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void dct64_sse(short *out0,short *out1,real *c)
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{
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DECLARE_ALIGNED(16, real, b1[0x20]);
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DECLARE_ALIGNED(16, real, b2[0x20]);
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static real const one = 1.f;
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{
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real *costab = costab_mmx;
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int i;
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for (i = 0; i < 0x20 / 2; i += 4)
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{
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asm(
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"movaps %2, %%xmm3\n\t"
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"shufps $27, %%xmm3, %%xmm3\n\t"
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"movaps %3, %%xmm1\n\t"
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"movaps %%xmm1, %%xmm4\n\t"
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"movaps %4, %%xmm2\n\t"
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"shufps $27, %%xmm4, %%xmm4\n\t"
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"movaps %%xmm2, %%xmm0\n\t"
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"shufps $27, %%xmm0, %%xmm0\n\t"
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"addps %%xmm0, %%xmm1\n\t"
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"movaps %%xmm1, %0\n\t"
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"subps %%xmm2, %%xmm4\n\t"
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"mulps %%xmm3, %%xmm4\n\t"
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"movaps %%xmm4, %1\n\t"
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:"=m"(*(b1 + i)), "=m"(*(b1 + 0x1c - i))
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:"m"(*(costab + i)), "m"(*(c + i)), "m"(*(c + 0x1c - i))
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);
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}
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}
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{
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int i;
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for (i = 0; i < 0x20; i += 0x10)
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{
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asm(
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"movaps %4, %%xmm1\n\t"
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"movaps %5, %%xmm3\n\t"
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"movaps %6, %%xmm4\n\t"
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"movaps %7, %%xmm6\n\t"
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"movaps %%xmm1, %%xmm7\n\t"
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"shufps $27, %%xmm7, %%xmm7\n\t"
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"movaps %%xmm3, %%xmm5\n\t"
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"shufps $27, %%xmm5, %%xmm5\n\t"
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"movaps %%xmm4, %%xmm2\n\t"
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"shufps $27, %%xmm2, %%xmm2\n\t"
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"movaps %%xmm6, %%xmm0\n\t"
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"shufps $27, %%xmm0, %%xmm0\n\t"
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"addps %%xmm0, %%xmm1\n\t"
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"movaps %%xmm1, %0\n\t"
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"addps %%xmm2, %%xmm3\n\t"
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"movaps %%xmm3, %1\n\t"
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"subps %%xmm4, %%xmm5\n\t"
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"movaps %%xmm5, %2\n\t"
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"subps %%xmm6, %%xmm7\n\t"
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"movaps %%xmm7, %3\n\t"
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:"=m"(*(b2 + i)), "=m"(*(b2 + i + 4)), "=m"(*(b2 + i + 8)), "=m"(*(b2 + i + 12))
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:"m"(*(b1 + i)), "m"(*(b1 + i + 4)), "m"(*(b1 + i + 8)), "m"(*(b1 + i + 12))
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);
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}
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}
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{
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real *costab = costab_mmx + 16;
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asm(
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"movaps %4, %%xmm0\n\t"
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"movaps %5, %%xmm1\n\t"
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"movaps %8, %%xmm4\n\t"
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"xorps %%xmm6, %%xmm6\n\t"
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"shufps $27, %%xmm4, %%xmm4\n\t"
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"mulps %%xmm4, %%xmm1\n\t"
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"movaps %9, %%xmm2\n\t"
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"xorps %%xmm7, %%xmm7\n\t"
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"shufps $27, %%xmm2, %%xmm2\n\t"
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"mulps %%xmm2, %%xmm0\n\t"
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"movaps %%xmm0, %0\n\t"
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"movaps %%xmm1, %1\n\t"
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"movaps %6, %%xmm3\n\t"
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"mulps %%xmm2, %%xmm3\n\t"
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"subps %%xmm3, %%xmm6\n\t"
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"movaps %%xmm6, %2\n\t"
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"movaps %7, %%xmm5\n\t"
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"mulps %%xmm4, %%xmm5\n\t"
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"subps %%xmm5, %%xmm7\n\t"
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"movaps %%xmm7, %3\n\t"
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:"=m"(*(b2 + 8)), "=m"(*(b2 + 0xc)), "=m"(*(b2 + 0x18)), "=m"(*(b2 + 0x1c))
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:"m"(*(b2 + 8)), "m"(*(b2 + 0xc)), "m"(*(b2 + 0x18)), "m"(*(b2 + 0x1c)), "m"(*costab), "m"(*(costab + 4))
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);
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}
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{
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real *costab = costab_mmx + 24;
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int i;
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asm(
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"movaps %0, %%xmm0\n\t"
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"shufps $27, %%xmm0, %%xmm0\n\t"
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"movaps %1, %%xmm5\n\t"
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"movaps %%xmm5, %%xmm6\n\t"
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:
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:"m"(*costab), "m"(*nnnn)
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);
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for (i = 0; i < 0x20; i += 8)
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{
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asm(
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"movaps %2, %%xmm2\n\t"
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"movaps %3, %%xmm3\n\t"
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"movaps %%xmm2, %%xmm4\n\t"
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"xorps %%xmm5, %%xmm6\n\t"
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"shufps $27, %%xmm4, %%xmm4\n\t"
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"movaps %%xmm3, %%xmm1\n\t"
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"shufps $27, %%xmm1, %%xmm1\n\t"
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"addps %%xmm1, %%xmm2\n\t"
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"movaps %%xmm2, %0\n\t"
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"subps %%xmm3, %%xmm4\n\t"
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"xorps %%xmm6, %%xmm4\n\t"
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"mulps %%xmm0, %%xmm4\n\t"
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"movaps %%xmm4, %1\n\t"
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:"=m"(*(b1 + i)), "=m"(*(b1 + i + 4))
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:"m"(*(b2 + i)), "m"(*(b2 + i + 4))
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);
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}
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}
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{
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int i;
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asm(
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"movss %0, %%xmm1\n\t"
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"movss %1, %%xmm0\n\t"
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"movaps %%xmm1, %%xmm3\n\t"
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"unpcklps %%xmm0, %%xmm3\n\t"
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"movss %2, %%xmm2\n\t"
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"movaps %%xmm1, %%xmm0\n\t"
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"unpcklps %%xmm2, %%xmm0\n\t"
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"unpcklps %%xmm3, %%xmm0\n\t"
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"movaps %3, %%xmm2\n\t"
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:
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:"m"(one), "m"(costab_mmx[28]), "m"(costab_mmx[29]), "m"(*ppnn)
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);
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for (i = 0; i < 0x20; i += 8)
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{
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asm(
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"movaps %2, %%xmm3\n\t"
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"movaps %%xmm3, %%xmm4\n\t"
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"shufps $20, %%xmm4, %%xmm4\n\t"
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"shufps $235, %%xmm3, %%xmm3\n\t"
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"xorps %%xmm2, %%xmm3\n\t"
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"addps %%xmm3, %%xmm4\n\t"
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"mulps %%xmm0, %%xmm4\n\t"
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"movaps %%xmm4, %0\n\t"
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"movaps %3, %%xmm6\n\t"
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"movaps %%xmm6, %%xmm5\n\t"
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"shufps $27, %%xmm5, %%xmm5\n\t"
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"xorps %%xmm2, %%xmm5\n\t"
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"addps %%xmm5, %%xmm6\n\t"
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"mulps %%xmm0, %%xmm6\n\t"
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"movaps %%xmm6, %1\n\t"
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:"=m"(*(b2 + i)), "=m"(*(b2 + i + 4))
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:"m"(*(b1 + i)), "m"(*(b1 + i + 4))
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);
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}
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}
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{
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int i;
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asm(
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"movss %0, %%xmm0\n\t"
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"movaps %%xmm1, %%xmm2\n\t"
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"movaps %%xmm0, %%xmm7\n\t"
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"unpcklps %%xmm1, %%xmm2\n\t"
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"unpcklps %%xmm0, %%xmm7\n\t"
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"movaps %1, %%xmm0\n\t"
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"unpcklps %%xmm7, %%xmm2\n\t"
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:
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:"m"(costab_mmx[30]), "m"(*pnpn)
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);
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for (i = 0x8; i < 0x20; i += 8)
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{
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asm volatile (
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"movaps %2, %%xmm1\n\t"
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"movaps %%xmm1, %%xmm3\n\t"
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"shufps $224, %%xmm3, %%xmm3\n\t"
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"shufps $181, %%xmm1, %%xmm1\n\t"
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"xorps %%xmm0, %%xmm1\n\t"
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"addps %%xmm1, %%xmm3\n\t"
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"mulps %%xmm2, %%xmm3\n\t"
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"movaps %%xmm3, %0\n\t"
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"movaps %3, %%xmm4\n\t"
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"movaps %%xmm4, %%xmm5\n\t"
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"shufps $224, %%xmm5, %%xmm5\n\t"
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"shufps $181, %%xmm4, %%xmm4\n\t"
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"xorps %%xmm0, %%xmm4\n\t"
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"addps %%xmm4, %%xmm5\n\t"
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"mulps %%xmm2, %%xmm5\n\t"
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"movaps %%xmm5, %1\n\t"
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:"=m"(*(b1 + i)), "=m"(*(b1 + i + 4))
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:"m"(*(b2 + i)), "m"(*(b2 + i + 4))
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:"memory"
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);
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}
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for (i = 0x8; i < 0x20; i += 8)
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{
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b1[i + 2] += b1[i + 3];
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b1[i + 6] += b1[i + 7];
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b1[i + 4] += b1[i + 6];
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b1[i + 6] += b1[i + 5];
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b1[i + 5] += b1[i + 7];
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}
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}
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#if 0
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/* Reference C code */
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/*
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Should run faster than x87 asm, given that the compiler is sane.
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However, the C code dosen't round with saturation (0x7fff for too
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large positive float, 0x8000 for too small negative float). You
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can hear the difference if you listen carefully.
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*/
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out0[256] = (short)(b2[0] + b2[1]);
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out0[0] = (short)((b2[0] - b2[1]) * costab_mmx[30]);
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out1[128] = (short)((b2[3] - b2[2]) * costab_mmx[30]);
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out0[128] = (short)((b2[3] - b2[2]) * costab_mmx[30] + b2[3] + b2[2]);
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out1[192] = (short)((b2[7] - b2[6]) * costab_mmx[30]);
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out0[192] = (short)((b2[7] - b2[6]) * costab_mmx[30] + b2[6] + b2[7] + b2[4] + b2[5]);
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out0[64] = (short)((b2[7] - b2[6]) * costab_mmx[30] + b2[6] + b2[7] + (b2[4] - b2[5]) * costab_mmx[30]);
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out1[64] = (short)((b2[7] - b2[6]) * costab_mmx[30] + (b2[4] - b2[5]) * costab_mmx[30]);
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out0[224] = (short)(b1[8] + b1[12]);
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out0[160] = (short)(b1[12] + b1[10]);
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out0[96] = (short)(b1[10] + b1[14]);
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out0[32] = (short)(b1[14] + b1[9]);
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out1[32] = (short)(b1[9] + b1[13]);
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out1[96] = (short)(b1[13] + b1[11]);
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out1[224] = (short)b1[15];
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out1[160] = (short)(b1[15] + b1[11]);
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out0[240] = (short)(b1[24] + b1[28] + b1[16]);
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out0[208] = (short)(b1[24] + b1[28] + b1[20]);
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out0[176] = (short)(b1[28] + b1[26] + b1[20]);
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out0[144] = (short)(b1[28] + b1[26] + b1[18]);
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out0[112] = (short)(b1[26] + b1[30] + b1[18]);
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out0[80] = (short)(b1[26] + b1[30] + b1[22]);
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out0[48] = (short)(b1[30] + b1[25] + b1[22]);
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out0[16] = (short)(b1[30] + b1[25] + b1[17]);
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out1[16] = (short)(b1[25] + b1[29] + b1[17]);
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out1[48] = (short)(b1[25] + b1[29] + b1[21]);
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out1[80] = (short)(b1[29] + b1[27] + b1[21]);
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out1[112] = (short)(b1[29] + b1[27] + b1[19]);
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out1[144] = (short)(b1[27] + b1[31] + b1[19]);
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out1[176] = (short)(b1[27] + b1[31] + b1[23]);
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out1[240] = (short)(b1[31]);
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out1[208] = (short)(b1[31] + b1[23]);
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#else
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/*
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To do saturation efficiently in x86 we can use fist(t)(p),
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pf2iw, or packssdw. We use fist(p) here.
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*/
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asm(
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"flds %0\n\t"
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"flds (%2)\n\t"
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"fadds 4(%2)\n\t"
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"fistp 512(%3)\n\t"
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"flds (%2)\n\t"
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"fsubs 4(%2)\n\t"
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"fmul %%st(1)\n\t"
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"fistp (%3)\n\t"
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"flds 12(%2)\n\t"
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"fsubs 8(%2)\n\t"
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"fmul %%st(1)\n\t"
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"fist 256(%4)\n\t"
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"fadds 12(%2)\n\t"
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"fadds 8(%2)\n\t"
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"fistp 256(%3)\n\t"
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"flds 16(%2)\n\t"
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"fsubs 20(%2)\n\t"
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"fmul %%st(1)\n\t"
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"flds 28(%2)\n\t"
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"fsubs 24(%2)\n\t"
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"fmul %%st(2)\n\t"
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"fist 384(%4)\n\t"
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"fld %%st(0)\n\t"
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"fadds 24(%2)\n\t"
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"fadds 28(%2)\n\t"
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"fld %%st(0)\n\t"
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"fadds 16(%2)\n\t"
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"fadds 20(%2)\n\t"
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"fistp 384(%3)\n\t"
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"fadd %%st(2)\n\t"
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"fistp 128(%3)\n\t"
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"faddp %%st(1)\n\t"
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"fistp 128(%4)\n\t"
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"flds 32(%1)\n\t"
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"fadds 48(%1)\n\t"
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"fistp 448(%3)\n\t"
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"flds 48(%1)\n\t"
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"fadds 40(%1)\n\t"
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"fistp 320(%3)\n\t"
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"flds 40(%1)\n\t"
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"fadds 56(%1)\n\t"
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"fistp 192(%3)\n\t"
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"flds 56(%1)\n\t"
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"fadds 36(%1)\n\t"
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"fistp 64(%3)\n\t"
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"flds 36(%1)\n\t"
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"fadds 52(%1)\n\t"
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"fistp 64(%4)\n\t"
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"flds 52(%1)\n\t"
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"fadds 44(%1)\n\t"
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"fistp 192(%4)\n\t"
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"flds 60(%1)\n\t"
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"fist 448(%4)\n\t"
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"fadds 44(%1)\n\t"
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"fistp 320(%4)\n\t"
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"flds 96(%1)\n\t"
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"fadds 112(%1)\n\t"
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"fld %%st(0)\n\t"
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"fadds 64(%1)\n\t"
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"fistp 480(%3)\n\t"
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"fadds 80(%1)\n\t"
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"fistp 416(%3)\n\t"
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"flds 112(%1)\n\t"
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"fadds 104(%1)\n\t"
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"fld %%st(0)\n\t"
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"fadds 80(%1)\n\t"
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"fistp 352(%3)\n\t"
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"fadds 72(%1)\n\t"
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"fistp 288(%3)\n\t"
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"flds 104(%1)\n\t"
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"fadds 120(%1)\n\t"
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"fld %%st(0)\n\t"
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"fadds 72(%1)\n\t"
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"fistp 224(%3)\n\t"
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"fadds 88(%1)\n\t"
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"fistp 160(%3)\n\t"
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"flds 120(%1)\n\t"
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"fadds 100(%1)\n\t"
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"fld %%st(0)\n\t"
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"fadds 88(%1)\n\t"
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"fistp 96(%3)\n\t"
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"fadds 68(%1)\n\t"
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"fistp 32(%3)\n\t"
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"flds 100(%1)\n\t"
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"fadds 116(%1)\n\t"
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"fld %%st(0)\n\t"
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"fadds 68(%1)\n\t"
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"fistp 32(%4)\n\t"
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"fadds 84(%1)\n\t"
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"fistp 96(%4)\n\t"
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"flds 116(%1)\n\t"
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"fadds 108(%1)\n\t"
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"fld %%st(0)\n\t"
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"fadds 84(%1)\n\t"
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"fistp 160(%4)\n\t"
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"fadds 76(%1)\n\t"
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"fistp 224(%4)\n\t"
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"flds 108(%1)\n\t"
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"fadds 124(%1)\n\t"
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"fld %%st(0)\n\t"
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"fadds 76(%1)\n\t"
|
|
"fistp 288(%4)\n\t"
|
|
"fadds 92(%1)\n\t"
|
|
"fistp 352(%4)\n\t"
|
|
|
|
"flds 124(%1)\n\t"
|
|
"fist 480(%4)\n\t"
|
|
"fadds 92(%1)\n\t"
|
|
"fistp 416(%4)\n\t"
|
|
".byte 0xdf, 0xc0\n\t" // ffreep %%st(0)
|
|
:
|
|
:"m"(costab_mmx[30]), "r"(b1), "r"(b2), "r"(out0), "r"(out1)
|
|
:"memory"
|
|
);
|
|
#endif
|
|
out1[0] = out0[0];
|
|
}
|
|
|