/* * FFT/MDCT transform with SSE optimizations * Copyright (c) 2002 Fabrice Bellard. * * 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 "dsputil.h" static const int p1p1p1m1[4] __attribute__((aligned(16))) = { 0, 0, 0, 1 << 31 }; static const int p1p1m1p1[4] __attribute__((aligned(16))) = { 0, 0, 1 << 31, 0 }; static const int p1p1m1m1[4] __attribute__((aligned(16))) = { 0, 0, 1 << 31, 1 << 31 }; static const int p1m1p1m1[4] __attribute__((aligned(16))) = { 0, 1 << 31, 0, 1 << 31 }; static const int m1m1m1m1[4] __attribute__((aligned(16))) = { 1 << 31, 1 << 31, 1 << 31, 1 << 31 }; #if 0 static void print_v4sf(const char *str, __m128 a) { float *p = (float *)&a; printf("%s: %f %f %f %f\n", str, p[0], p[1], p[2], p[3]); } #endif /* XXX: handle reverse case */ void ff_fft_calc_sse(FFTContext *s, FFTComplex *z) { int ln = s->nbits; long i, j; long nblocks, nloops; FFTComplex *p, *cptr; asm volatile( "movaps %0, %%xmm4 \n\t" "movaps %1, %%xmm5 \n\t" ::"m"(*p1p1m1m1), "m"(*(s->inverse ? p1p1m1p1 : p1p1p1m1)) ); i = 8 << ln; asm volatile( "1: \n\t" "sub $32, %0 \n\t" /* do the pass 0 butterfly */ "movaps (%0,%1), %%xmm0 \n\t" "movaps %%xmm0, %%xmm1 \n\t" "shufps $0x4E, %%xmm0, %%xmm0 \n\t" "xorps %%xmm4, %%xmm1 \n\t" "addps %%xmm1, %%xmm0 \n\t" "movaps 16(%0,%1), %%xmm2 \n\t" "movaps %%xmm2, %%xmm3 \n\t" "shufps $0x4E, %%xmm2, %%xmm2 \n\t" "xorps %%xmm4, %%xmm3 \n\t" "addps %%xmm3, %%xmm2 \n\t" /* multiply third by -i */ /* by toggling the sign bit */ "shufps $0xB4, %%xmm2, %%xmm2 \n\t" "xorps %%xmm5, %%xmm2 \n\t" /* do the pass 1 butterfly */ "movaps %%xmm0, %%xmm1 \n\t" "addps %%xmm2, %%xmm0 \n\t" "subps %%xmm2, %%xmm1 \n\t" "movaps %%xmm0, (%0,%1) \n\t" "movaps %%xmm1, 16(%0,%1) \n\t" "jg 1b \n\t" :"+r"(i) :"r"(z) ); /* pass 2 .. ln-1 */ nblocks = 1 << (ln-3); nloops = 1 << 2; cptr = s->exptab1; do { p = z; j = nblocks; do { i = nloops*8; asm volatile( "1: \n\t" "sub $32, %0 \n\t" "movaps (%2,%0), %%xmm1 \n\t" "movaps (%1,%0), %%xmm0 \n\t" "movaps 16(%2,%0), %%xmm5 \n\t" "movaps 16(%1,%0), %%xmm4 \n\t" "movaps %%xmm1, %%xmm2 \n\t" "movaps %%xmm5, %%xmm6 \n\t" "shufps $0xA0, %%xmm1, %%xmm1 \n\t" "shufps $0xF5, %%xmm2, %%xmm2 \n\t" "shufps $0xA0, %%xmm5, %%xmm5 \n\t" "shufps $0xF5, %%xmm6, %%xmm6 \n\t" "mulps (%3,%0,2), %%xmm1 \n\t" // cre*re cim*re "mulps 16(%3,%0,2), %%xmm2 \n\t" // -cim*im cre*im "mulps 32(%3,%0,2), %%xmm5 \n\t" // cre*re cim*re "mulps 48(%3,%0,2), %%xmm6 \n\t" // -cim*im cre*im "addps %%xmm2, %%xmm1 \n\t" "addps %%xmm6, %%xmm5 \n\t" "movaps %%xmm0, %%xmm3 \n\t" "movaps %%xmm4, %%xmm7 \n\t" "addps %%xmm1, %%xmm0 \n\t" "subps %%xmm1, %%xmm3 \n\t" "addps %%xmm5, %%xmm4 \n\t" "subps %%xmm5, %%xmm7 \n\t" "movaps %%xmm0, (%1,%0) \n\t" "movaps %%xmm3, (%2,%0) \n\t" "movaps %%xmm4, 16(%1,%0) \n\t" "movaps %%xmm7, 16(%2,%0) \n\t" "jg 1b \n\t" :"+r"(i) :"r"(p), "r"(p + nloops), "r"(cptr) ); p += nloops*2; } while (--j); cptr += nloops*2; nblocks >>= 1; nloops <<= 1; } while (nblocks != 0); } void ff_imdct_calc_sse(MDCTContext *s, FFTSample *output, const FFTSample *input, FFTSample *tmp) { long k, n8, n4, n2, n; const uint16_t *revtab = s->fft.revtab; const FFTSample *tcos = s->tcos; const FFTSample *tsin = s->tsin; const FFTSample *in1, *in2; FFTComplex *z = (FFTComplex *)tmp; n = 1 << s->nbits; n2 = n >> 1; n4 = n >> 2; n8 = n >> 3; #ifdef ARCH_X86_64 asm volatile ("movaps %0, %%xmm8\n\t"::"m"(*p1m1p1m1)); #define P1M1P1M1 "%%xmm8" #else #define P1M1P1M1 "%4" #endif /* pre rotation */ in1 = input; in2 = input + n2 - 4; /* Complex multiplication */ for (k = 0; k < n4; k += 4) { asm volatile ( "movaps %0, %%xmm0 \n\t" // xmm0 = r0 X r1 X : in2 "movaps %1, %%xmm3 \n\t" // xmm3 = X i1 X i0: in1 "movaps -16+1*%0, %%xmm4 \n\t" // xmm4 = r0 X r1 X : in2 "movaps 16+1*%1, %%xmm7 \n\t" // xmm7 = X i1 X i0: in1 "movlps %2, %%xmm1 \n\t" // xmm1 = X X R1 R0: tcos "movlps %3, %%xmm2 \n\t" // xmm2 = X X I1 I0: tsin "movlps 8+1*%2, %%xmm5 \n\t" // xmm5 = X X R1 R0: tcos "movlps 8+1*%3, %%xmm6 \n\t" // xmm6 = X X I1 I0: tsin "shufps $95, %%xmm0, %%xmm0 \n\t" // xmm0 = r1 r1 r0 r0 "shufps $160,%%xmm3, %%xmm3 \n\t" // xmm3 = i1 i1 i0 i0 "shufps $95, %%xmm4, %%xmm4 \n\t" // xmm4 = r1 r1 r0 r0 "shufps $160,%%xmm7, %%xmm7 \n\t" // xmm7 = i1 i1 i0 i0 "unpcklps %%xmm2, %%xmm1 \n\t" // xmm1 = I1 R1 I0 R0 "unpcklps %%xmm6, %%xmm5 \n\t" // xmm5 = I1 R1 I0 R0 "movaps %%xmm1, %%xmm2 \n\t" // xmm2 = I1 R1 I0 R0 "movaps %%xmm5, %%xmm6 \n\t" // xmm6 = I1 R1 I0 R0 "xorps "P1M1P1M1", %%xmm2 \n\t" // xmm2 = -I1 R1 -I0 R0 "xorps "P1M1P1M1", %%xmm6 \n\t" // xmm6 = -I1 R1 -I0 R0 "mulps %%xmm1, %%xmm0 \n\t" // xmm0 = rI rR rI rR "mulps %%xmm5, %%xmm4 \n\t" // xmm4 = rI rR rI rR "shufps $177,%%xmm2, %%xmm2 \n\t" // xmm2 = R1 -I1 R0 -I0 "shufps $177,%%xmm6, %%xmm6 \n\t" // xmm6 = R1 -I1 R0 -I0 "mulps %%xmm2, %%xmm3 \n\t" // xmm3 = Ri -Ii Ri -Ii "mulps %%xmm6, %%xmm7 \n\t" // xmm7 = Ri -Ii Ri -Ii "addps %%xmm3, %%xmm0 \n\t" // xmm0 = result "addps %%xmm7, %%xmm4 \n\t" // xmm4 = result ::"m"(in2[-2*k]), "m"(in1[2*k]), "m"(tcos[k]), "m"(tsin[k]) #ifndef ARCH_X86_64 ,"m"(*p1m1p1m1) #endif ); /* Should be in the same block, hack for gcc2.95 & gcc3 */ asm ( "movlps %%xmm0, %0 \n\t" "movhps %%xmm0, %1 \n\t" "movlps %%xmm4, %2 \n\t" "movhps %%xmm4, %3 \n\t" :"=m"(z[revtab[k]]), "=m"(z[revtab[k + 1]]), "=m"(z[revtab[k + 2]]), "=m"(z[revtab[k + 3]]) ); } ff_fft_calc_sse(&s->fft, z); #ifndef ARCH_X86_64 #undef P1M1P1M1 #define P1M1P1M1 "%3" #endif /* post rotation + reordering */ for (k = 0; k < n4; k += 4) { asm ( "movaps %0, %%xmm0 \n\t" // xmm0 = i1 r1 i0 r0: z "movaps 16+1*%0, %%xmm4 \n\t" // xmm4 = i1 r1 i0 r0: z "movlps %1, %%xmm1 \n\t" // xmm1 = X X R1 R0: tcos "movlps 8+1*%1, %%xmm5 \n\t" // xmm5 = X X R1 R0: tcos "movaps %%xmm0, %%xmm3 \n\t" // xmm3 = i1 r1 i0 r0 "movaps %%xmm4, %%xmm7 \n\t" // xmm7 = i1 r1 i0 r0 "movlps %2, %%xmm2 \n\t" // xmm2 = X X I1 I0: tsin "movlps 8+1*%2, %%xmm6 \n\t" // xmm6 = X X I1 I0: tsin "shufps $160,%%xmm0, %%xmm0 \n\t" // xmm0 = r1 r1 r0 r0 "shufps $245,%%xmm3, %%xmm3 \n\t" // xmm3 = i1 i1 i0 i0 "shufps $160,%%xmm4, %%xmm4 \n\t" // xmm4 = r1 r1 r0 r0 "shufps $245,%%xmm7, %%xmm7 \n\t" // xmm7 = i1 i1 i0 i0 "unpcklps %%xmm2, %%xmm1 \n\t" // xmm1 = I1 R1 I0 R0 "unpcklps %%xmm6, %%xmm5 \n\t" // xmm5 = I1 R1 I0 R0 "movaps %%xmm1, %%xmm2 \n\t" // xmm2 = I1 R1 I0 R0 "movaps %%xmm5, %%xmm6 \n\t" // xmm6 = I1 R1 I0 R0 "xorps "P1M1P1M1", %%xmm2 \n\t" // xmm2 = -I1 R1 -I0 R0 "mulps %%xmm1, %%xmm0 \n\t" // xmm0 = rI rR rI rR "xorps "P1M1P1M1", %%xmm6 \n\t" // xmm6 = -I1 R1 -I0 R0 "mulps %%xmm5, %%xmm4 \n\t" // xmm4 = rI rR rI rR "shufps $177,%%xmm2, %%xmm2 \n\t" // xmm2 = R1 -I1 R0 -I0 "shufps $177,%%xmm6, %%xmm6 \n\t" // xmm6 = R1 -I1 R0 -I0 "mulps %%xmm2, %%xmm3 \n\t" // xmm3 = Ri -Ii Ri -Ii "mulps %%xmm6, %%xmm7 \n\t" // xmm7 = Ri -Ii Ri -Ii "addps %%xmm3, %%xmm0 \n\t" // xmm0 = result "addps %%xmm7, %%xmm4 \n\t" // xmm4 = result "movaps %%xmm0, %0 \n\t" "movaps %%xmm4, 16+1*%0\n\t" :"+m"(z[k]) :"m"(tcos[k]), "m"(tsin[k]) #ifndef ARCH_X86_64 ,"m"(*p1m1p1m1) #endif ); } /* Mnemonics: 0 = z[k].re 1 = z[k].im 2 = z[k + 1].re 3 = z[k + 1].im 4 = z[-k - 2].re 5 = z[-k - 2].im 6 = z[-k - 1].re 7 = z[-k - 1].im */ k = 16-n; asm volatile("movaps %0, %%xmm7 \n\t"::"m"(*m1m1m1m1)); asm volatile( "1: \n\t" "movaps -16(%4,%0), %%xmm1 \n\t" // xmm1 = 4 5 6 7 = z[-2-k] "neg %0 \n\t" "movaps (%4,%0), %%xmm0 \n\t" // xmm0 = 0 1 2 3 = z[k] "xorps %%xmm7, %%xmm0 \n\t" // xmm0 = -0 -1 -2 -3 "movaps %%xmm0, %%xmm2 \n\t" // xmm2 = -0 -1 -2 -3 "shufps $141,%%xmm1, %%xmm0 \n\t" // xmm0 = -1 -3 4 6 "shufps $216,%%xmm1, %%xmm2 \n\t" // xmm2 = -0 -2 5 7 "shufps $156,%%xmm0, %%xmm0 \n\t" // xmm0 = -1 6 -3 4 ! "shufps $156,%%xmm2, %%xmm2 \n\t" // xmm2 = -0 7 -2 5 ! "movaps %%xmm0, (%1,%0) \n\t" // output[2*k] "movaps %%xmm2, (%2,%0) \n\t" // output[n2+2*k] "neg %0 \n\t" "shufps $27, %%xmm0, %%xmm0 \n\t" // xmm0 = 4 -3 6 -1 "xorps %%xmm7, %%xmm0 \n\t" // xmm0 = -4 3 -6 1 ! "shufps $27, %%xmm2, %%xmm2 \n\t" // xmm2 = 5 -2 7 -0 ! "movaps %%xmm0, -16(%2,%0) \n\t" // output[n2-4-2*k] "movaps %%xmm2, -16(%3,%0) \n\t" // output[n-4-2*k] "add $16, %0 \n\t" "jle 1b \n\t" :"+r"(k) :"r"(output), "r"(output+n2), "r"(output+n), "r"(z+n8) :"memory" ); }