Add shift argument to MULL() macro
This replaces use of FRAC_BITS in the MULL() definition with a third argument specifying the shift amount. All uses of this macro are updated to pass FRAC_BITS as third argument. Originally committed as revision 15921 to svn://svn.ffmpeg.org/ffmpeg/trunk
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@ -25,19 +25,17 @@
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#include <stdint.h>
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#include "libavutil/common.h"
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#ifdef FRAC_BITS
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# define MULL MULL
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static inline av_const int MULL(int a, int b)
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static inline av_const int MULL(int a, int b, unsigned shift)
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{
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int lo, hi;
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__asm__("smull %0, %1, %2, %3 \n\t"
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"mov %0, %0, lsr %4 \n\t"
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"add %1, %0, %1, lsl %5 \n\t"
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: "=&r"(lo), "=&r"(hi)
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: "r"(b), "r"(a), "i"(FRAC_BITS), "i"(32-FRAC_BITS));
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: "r"(b), "r"(a), "i"(shift), "i"(32-shift));
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return hi;
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}
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#endif
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#define MULH MULH
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#ifdef HAVE_ARMV6
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@ -22,15 +22,13 @@
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#ifndef AVCODEC_I386_MATHOPS_H
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#define AVCODEC_I386_MATHOPS_H
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#ifdef FRAC_BITS
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# define MULL(ra, rb) \
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#define MULL(ra, rb, shift) \
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({ int rt, dummy; __asm__ (\
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"imull %3 \n\t"\
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"shrdl %4, %%edx, %%eax \n\t"\
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: "=a"(rt), "=d"(dummy)\
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: "a" ((int)ra), "rm" ((int)rb), "i"(FRAC_BITS));\
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: "a" ((int)ra), "rm" ((int)rb), "i"(shift));\
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rt; })
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#endif
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#define MULH(ra, rb) \
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({ int rt, dummy;\
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@ -72,7 +72,7 @@ static void lsp2poly(int* f, const int16_t* lsp, int lp_half_order)
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{
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f[i] = f[i-2];
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for(j=i; j>1; j--)
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f[j] -= MULL(f[j-1], lsp[2*i-2]) - f[j-2];
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f[j] -= MULL(f[j-1], lsp[2*i-2], FRAC_BITS) - f[j-2];
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f[1] -= lsp[2*i-2] << 8;
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}
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@ -45,7 +45,7 @@
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/* generic implementation */
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#ifndef MULL
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# define MULL(a,b) (((int64_t)(a) * (int64_t)(b)) >> FRAC_BITS)
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# define MULL(a,b,s) (((int64_t)(a) * (int64_t)(b)) >> (s))
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#endif
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#ifndef MULH
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@ -351,9 +351,9 @@ static int decode_init(AVCodecContext * avctx)
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int n, norm;
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n = i + 2;
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norm = ((INT64_C(1) << n) * FRAC_ONE) / ((1 << n) - 1);
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scale_factor_mult[i][0] = MULL(FIXR(1.0 * 2.0), norm);
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scale_factor_mult[i][1] = MULL(FIXR(0.7937005259 * 2.0), norm);
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scale_factor_mult[i][2] = MULL(FIXR(0.6299605249 * 2.0), norm);
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scale_factor_mult[i][0] = MULL(FIXR(1.0 * 2.0), norm, FRAC_BITS);
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scale_factor_mult[i][1] = MULL(FIXR(0.7937005259 * 2.0), norm, FRAC_BITS);
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scale_factor_mult[i][2] = MULL(FIXR(0.6299605249 * 2.0), norm, FRAC_BITS);
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dprintf(avctx, "%d: norm=%x s=%x %x %x\n",
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i, norm,
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scale_factor_mult[i][0],
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@ -1097,7 +1097,7 @@ static void imdct36(int *out, int *buf, int *in, int *win)
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t2 = tmp[i + 1];
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t3 = tmp[i + 3];
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s1 = MULH(2*(t3 + t2), icos36h[j]);
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s3 = MULL(t3 - t2, icos36[8 - j]);
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s3 = MULL(t3 - t2, icos36[8 - j], FRAC_BITS);
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t0 = s0 + s1;
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t1 = s0 - s1;
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@ -1705,8 +1705,8 @@ static void compute_stereo(MPADecodeContext *s,
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v2 = is_tab[1][sf];
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for(j=0;j<len;j++) {
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tmp0 = tab0[j];
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tab0[j] = MULL(tmp0, v1);
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tab1[j] = MULL(tmp0, v2);
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tab0[j] = MULL(tmp0, v1, FRAC_BITS);
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tab1[j] = MULL(tmp0, v2, FRAC_BITS);
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}
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} else {
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found1:
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@ -1716,8 +1716,8 @@ static void compute_stereo(MPADecodeContext *s,
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for(j=0;j<len;j++) {
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tmp0 = tab0[j];
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tmp1 = tab1[j];
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tab0[j] = MULL(tmp0 + tmp1, ISQRT2);
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tab1[j] = MULL(tmp0 - tmp1, ISQRT2);
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tab0[j] = MULL(tmp0 + tmp1, ISQRT2, FRAC_BITS);
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tab1[j] = MULL(tmp0 - tmp1, ISQRT2, FRAC_BITS);
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}
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}
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}
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@ -1749,8 +1749,8 @@ static void compute_stereo(MPADecodeContext *s,
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v2 = is_tab[1][sf];
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for(j=0;j<len;j++) {
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tmp0 = tab0[j];
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tab0[j] = MULL(tmp0, v1);
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tab1[j] = MULL(tmp0, v2);
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tab0[j] = MULL(tmp0, v1, FRAC_BITS);
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tab1[j] = MULL(tmp0, v2, FRAC_BITS);
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}
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} else {
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found2:
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@ -1760,8 +1760,8 @@ static void compute_stereo(MPADecodeContext *s,
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for(j=0;j<len;j++) {
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tmp0 = tab0[j];
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tmp1 = tab1[j];
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tab0[j] = MULL(tmp0 + tmp1, ISQRT2);
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tab1[j] = MULL(tmp0 - tmp1, ISQRT2);
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tab0[j] = MULL(tmp0 + tmp1, ISQRT2, FRAC_BITS);
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tab1[j] = MULL(tmp0 - tmp1, ISQRT2, FRAC_BITS);
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}
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}
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}
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