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Diffstat (limited to 'src/libffmpeg/libavcodec/i386/fft_3dn2.c')
-rw-r--r--src/libffmpeg/libavcodec/i386/fft_3dn2.c210
1 files changed, 210 insertions, 0 deletions
diff --git a/src/libffmpeg/libavcodec/i386/fft_3dn2.c b/src/libffmpeg/libavcodec/i386/fft_3dn2.c
new file mode 100644
index 000000000..a4fe5f0b6
--- /dev/null
+++ b/src/libffmpeg/libavcodec/i386/fft_3dn2.c
@@ -0,0 +1,210 @@
+/*
+ * FFT/MDCT transform with Extended 3DNow! optimizations
+ * Copyright (c) 2006 Zuxy MENG Jie, Loren Merritt
+ * Based on fft_sse.c 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 p1m1[2] __attribute__((aligned(8))) =
+ { 0, 1 << 31 };
+
+static const int m1p1[2] __attribute__((aligned(8))) =
+ { 1 << 31, 0 };
+
+void ff_fft_calc_3dn2(FFTContext *s, FFTComplex *z)
+{
+ int ln = s->nbits;
+ long i, j;
+ long nblocks, nloops;
+ FFTComplex *p, *cptr;
+
+ asm volatile(
+ /* FEMMS is not a must here but recommended by AMD */
+ "femms \n\t"
+ "movq %0, %%mm7 \n\t"
+ ::"m"(*(s->inverse ? m1p1 : p1m1))
+ );
+
+ i = 8 << ln;
+ asm volatile(
+ "1: \n\t"
+ "sub $32, %0 \n\t"
+ "movq (%0,%1), %%mm0 \n\t"
+ "movq 16(%0,%1), %%mm1 \n\t"
+ "movq 8(%0,%1), %%mm2 \n\t"
+ "movq 24(%0,%1), %%mm3 \n\t"
+ "movq %%mm0, %%mm4 \n\t"
+ "movq %%mm1, %%mm5 \n\t"
+ "pfadd %%mm2, %%mm0 \n\t"
+ "pfadd %%mm3, %%mm1 \n\t"
+ "pfsub %%mm2, %%mm4 \n\t"
+ "pfsub %%mm3, %%mm5 \n\t"
+ "movq %%mm0, %%mm2 \n\t"
+ "pswapd %%mm5, %%mm5 \n\t"
+ "movq %%mm4, %%mm3 \n\t"
+ "pxor %%mm7, %%mm5 \n\t"
+ "pfadd %%mm1, %%mm0 \n\t"
+ "pfadd %%mm5, %%mm4 \n\t"
+ "pfsub %%mm1, %%mm2 \n\t"
+ "pfsub %%mm5, %%mm3 \n\t"
+ "movq %%mm0, (%0,%1) \n\t"
+ "movq %%mm4, 8(%0,%1) \n\t"
+ "movq %%mm2, 16(%0,%1) \n\t"
+ "movq %%mm3, 24(%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 $16, %0 \n\t"
+ "movq (%1,%0), %%mm0 \n\t"
+ "movq 8(%1,%0), %%mm1 \n\t"
+ "movq (%2,%0), %%mm2 \n\t"
+ "movq 8(%2,%0), %%mm3 \n\t"
+ "movq (%3,%0,2), %%mm4 \n\t"
+ "movq 8(%3,%0,2), %%mm5 \n\t"
+ "pswapd %%mm4, %%mm6 \n\t" // no need for cptr[2] & cptr[3]
+ "pswapd %%mm5, %%mm7 \n\t"
+ "pfmul %%mm2, %%mm4 \n\t" // cre*re cim*im
+ "pfmul %%mm3, %%mm5 \n\t"
+ "pfmul %%mm2, %%mm6 \n\t" // cim*re cre*im
+ "pfmul %%mm3, %%mm7 \n\t"
+ "pfpnacc %%mm6, %%mm4 \n\t" // cre*re-cim*im cim*re+cre*im
+ "pfpnacc %%mm7, %%mm5 \n\t"
+ "movq %%mm0, %%mm2 \n\t"
+ "movq %%mm1, %%mm3 \n\t"
+ "pfadd %%mm4, %%mm0 \n\t"
+ "pfadd %%mm5, %%mm1 \n\t"
+ "pfsub %%mm4, %%mm2 \n\t"
+ "pfsub %%mm5, %%mm3 \n\t"
+ "movq %%mm0, (%1,%0) \n\t"
+ "movq %%mm1, 8(%1,%0) \n\t"
+ "movq %%mm2, (%2,%0) \n\t"
+ "movq %%mm3, 8(%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);
+ asm volatile("femms");
+}
+
+void ff_imdct_calc_3dn2(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;
+
+ /* pre rotation */
+ in1 = input;
+ in2 = input + n2 - 1;
+ for(k = 0; k < n4; k++) {
+ // FIXME a single block is faster, but gcc 2.95 and 3.4.x on 32bit can't compile it
+ asm volatile(
+ "movd %0, %%mm0 \n\t"
+ "movd %2, %%mm1 \n\t"
+ "punpckldq %1, %%mm0 \n\t"
+ "punpckldq %3, %%mm1 \n\t"
+ "movq %%mm0, %%mm2 \n\t"
+ "pfmul %%mm1, %%mm0 \n\t"
+ "pswapd %%mm1, %%mm1 \n\t"
+ "pfmul %%mm1, %%mm2 \n\t"
+ "pfpnacc %%mm2, %%mm0 \n\t"
+ ::"m"(in2[-2*k]), "m"(in1[2*k]),
+ "m"(tcos[k]), "m"(tsin[k])
+ );
+ asm volatile(
+ "movq %%mm0, %0 \n\t"
+ :"=m"(z[revtab[k]])
+ );
+ }
+
+ ff_fft_calc(&s->fft, z);
+
+ /* post rotation + reordering */
+ for(k = 0; k < n4; k++) {
+ asm volatile(
+ "movq %0, %%mm0 \n\t"
+ "movd %1, %%mm1 \n\t"
+ "punpckldq %2, %%mm1 \n\t"
+ "movq %%mm0, %%mm2 \n\t"
+ "pfmul %%mm1, %%mm0 \n\t"
+ "pswapd %%mm1, %%mm1 \n\t"
+ "pfmul %%mm1, %%mm2 \n\t"
+ "pfpnacc %%mm2, %%mm0 \n\t"
+ "movq %%mm0, %0 \n\t"
+ :"+m"(z[k])
+ :"m"(tcos[k]), "m"(tsin[k])
+ );
+ }
+
+ k = n-8;
+ asm volatile("movd %0, %%mm7" ::"r"(1<<31));
+ asm volatile(
+ "1: \n\t"
+ "movq (%4,%0), %%mm0 \n\t" // z[n8+k]
+ "neg %0 \n\t"
+ "pswapd -8(%4,%0), %%mm1 \n\t" // z[n8-1-k]
+ "movq %%mm0, %%mm2 \n\t"
+ "pxor %%mm7, %%mm2 \n\t"
+ "punpckldq %%mm1, %%mm2 \n\t"
+ "pswapd %%mm2, %%mm3 \n\t"
+ "punpckhdq %%mm1, %%mm0 \n\t"
+ "pswapd %%mm0, %%mm4 \n\t"
+ "pxor %%mm7, %%mm0 \n\t"
+ "pxor %%mm7, %%mm4 \n\t"
+ "movq %%mm3, -8(%3,%0) \n\t" // output[n-2-2*k] = { z[n8-1-k].im, -z[n8+k].re }
+ "movq %%mm4, -8(%2,%0) \n\t" // output[n2-2-2*k]= { -z[n8-1-k].re, z[n8+k].im }
+ "neg %0 \n\t"
+ "movq %%mm0, (%1,%0) \n\t" // output[2*k] = { -z[n8+k].im, z[n8-1-k].re }
+ "movq %%mm2, (%2,%0) \n\t" // output[n2+2*k] = { -z[n8+k].re, z[n8-1-k].im }
+ "sub $8, %0 \n\t"
+ "jge 1b \n\t"
+ :"+r"(k)
+ :"r"(output), "r"(output+n2), "r"(output+n), "r"(z+n8)
+ :"memory"
+ );
+ asm volatile("femms");
+}
+
generated by cgit v1.2.3 (git 2.25.1) at 2025-04-25 16:14:34 +0000