* AltiVec-enabled
* Copyright (c) 2009 Loren Merritt
*
- * This file is part of FFmpeg.
+ * This file is part of Libav.
*
- * FFmpeg is free software; you can redistribute it and/or
+ * Libav 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,
+ * Libav 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
+ * License along with Libav; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
+
+#include "libavutil/ppc/types_altivec.h"
+#include "libavutil/ppc/util_altivec.h"
#include "libavcodec/fft.h"
-#include "util_altivec.h"
-#include "types_altivec.h"
-#include "regs.h"
/**
* Do a complex FFT with the parameters defined in ff_fft_init(). The
* It also assumes all FFTComplex are 8 bytes-aligned pair of float
*/
-// Pointers to functions. Not using function pointer syntax, because
-// that involves an extra level of indirection on some PPC ABIs.
-extern void *ff_fft_dispatch_altivec[2][15];
+void ff_fft_calc_altivec(FFTContext *s, FFTComplex *z);
+void ff_fft_calc_interleave_altivec(FFTContext *s, FFTComplex *z);
#if HAVE_GNU_AS
-// Convert from simd order to C order.
-static void swizzle(vec_f *z, int n)
-{
- int i;
- n >>= 1;
- for (i = 0; i < n; i += 2) {
- vec_f re = z[i];
- vec_f im = z[i+1];
- z[i] = vec_mergeh(re, im);
- z[i+1] = vec_mergel(re, im);
- }
-}
-
-static av_always_inline void fft_dispatch(FFTContext *s, FFTComplex *z, int do_swizzle)
-{
- register vec_f v14 __asm__("v14") = {0,0,0,0};
- register vec_f v15 __asm__("v15") = *(const vec_f*)ff_cos_16;
- register vec_f v16 __asm__("v16") = {0, 0.38268343, M_SQRT1_2, 0.92387953};
- register vec_f v17 __asm__("v17") = {-M_SQRT1_2, M_SQRT1_2, M_SQRT1_2,-M_SQRT1_2};
- register vec_f v18 __asm__("v18") = { M_SQRT1_2, M_SQRT1_2, M_SQRT1_2, M_SQRT1_2};
- register vec_u8 v19 __asm__("v19") = vcprm(s0,3,2,1);
- register vec_u8 v20 __asm__("v20") = vcprm(0,1,s2,s1);
- register vec_u8 v21 __asm__("v21") = vcprm(2,3,s0,s3);
- register vec_u8 v22 __asm__("v22") = vcprm(2,s3,3,s2);
- register vec_u8 v23 __asm__("v23") = vcprm(0,1,s0,s1);
- register vec_u8 v24 __asm__("v24") = vcprm(2,3,s2,s3);
- register vec_u8 v25 __asm__("v25") = vcprm(2,3,0,1);
- register vec_u8 v26 __asm__("v26") = vcprm(1,2,s3,s0);
- register vec_u8 v27 __asm__("v27") = vcprm(0,3,s2,s1);
- register vec_u8 v28 __asm__("v28") = vcprm(0,2,s1,s3);
- register vec_u8 v29 __asm__("v29") = vcprm(1,3,s0,s2);
- register FFTSample *const*cos_tabs __asm__("r12") = ff_cos_tabs;
- register FFTComplex *zarg __asm__("r3") = z;
- __asm__(
- "mtctr %0 \n"
- "li "r(9)", 16 \n"
- "subi "r(1)","r(1) ",%1 \n"
- "bctrl \n"
- "addi "r(1)","r(1) ",%1 \n"
- ::"r"(ff_fft_dispatch_altivec[do_swizzle][s->nbits-2]), "i"(12*sizeof(void*)),
- "r"(zarg), "r"(cos_tabs),
- "v"(v14),"v"(v15),"v"(v16),"v"(v17),"v"(v18),"v"(v19),"v"(v20),"v"(v21),
- "v"(v22),"v"(v23),"v"(v24),"v"(v25),"v"(v26),"v"(v27),"v"(v28),"v"(v29)
- : "lr","ctr","r0","r4","r5","r6","r7","r8","r9","r10","r11",
- "v0","v1","v2","v3","v4","v5","v6","v7","v8","v9","v10","v11","v12","v13"
- );
- if (do_swizzle && s->nbits <= 4)
- swizzle((vec_f*)z, 1<<s->nbits);
-}
-
-static void ff_fft_calc_altivec(FFTContext *s, FFTComplex *z)
-{
- fft_dispatch(s, z, 1);
-}
-
static void ff_imdct_half_altivec(FFTContext *s, FFTSample *output, const FFTSample *input)
{
int j, k;
k--;
} while(k >= 0);
- fft_dispatch(s, (FFTComplex*)output, 0);
+ ff_fft_calc_altivec(s, (FFTComplex*)output);
/* post rotation + reordering */
j = -n32;
int n = 1 << s->mdct_bits;
int n4 = n >> 2;
int n16 = n >> 4;
- vec_u32 sign = {1<<31,1<<31,1<<31,1<<31};
+ vec_u32 sign = {1U<<31,1U<<31,1U<<31,1U<<31};
vec_u32 *p0 = (vec_u32*)(output+n4);
vec_u32 *p1 = (vec_u32*)(output+n4*3);
av_cold void ff_fft_init_altivec(FFTContext *s)
{
- if (HAVE_GNU_AS) {
- s->fft_calc = ff_fft_calc_altivec;
+#if HAVE_GNU_AS
+ s->fft_calc = ff_fft_calc_interleave_altivec;
+ if (s->mdct_bits >= 5) {
s->imdct_calc = ff_imdct_calc_altivec;
s->imdct_half = ff_imdct_half_altivec;
}
+#endif
}
projects / ffmpeg / blobdiff