ac16071399
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@27585 a1c6a512-1295-4272-9138-f99709370657
246 lines
7.8 KiB
C
246 lines
7.8 KiB
C
#ifndef _WMAPRO_MATH_H_
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#define _WMAPRO_MATH_H_
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#include <inttypes.h>
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/* rockbox: not used
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#define fixtof16(x) (float)((float)(x) / (float)(1 << 16))
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#define fixtof31(x) (float)((float)(x) / (float)(1 << 31))
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#define ftofix16(x) ((int32_t)((x) * (float)(1 << 16) + ((x) < 0 ? -0.5:0.5)))
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#define ftofix31(x) ((int32_t)((x) * (float)(1 << 31) + ((x) < 0 ? -0.5:0.5)))
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*/
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#if defined(CPU_ARM)
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/* Calculates: result = (X*Y)>>Z */
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#define fixmulshift(X,Y,Z) \
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({ \
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int32_t lo; \
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int32_t hi; \
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asm volatile ( \
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"smull %[lo], %[hi], %[x], %[y] \n\t" /* multiply */ \
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"mov %[lo], %[lo], lsr %[shr] \n\t" /* lo >>= Z */ \
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"orr %[lo], %[lo], %[hi], lsl %[shl]" /* lo |= (hi << (32-Z)) */ \
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: [lo]"=&r"(lo), [hi]"=&r"(hi) \
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: [x]"r"(X), [y]"r"(Y), [shr]"r"(Z), [shl]"r"(32-Z)); \
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lo; \
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})
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/* Calculates: result = (X*Y)>>16 */
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#define fixmul16(X,Y) \
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({ \
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int32_t lo; \
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int32_t hi; \
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asm volatile ( \
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"smull %[lo], %[hi], %[x], %[y] \n\t" /* multiply */ \
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"mov %[lo], %[lo], lsr #16 \n\t" /* lo >>= 16 */ \
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"orr %[lo], %[lo], %[hi], lsl #16" /* lo |= (hi << 16) */ \
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: [lo]"=&r"(lo), [hi]"=&r"(hi) \
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: [x]"r"(X), [y]"r"(Y)); \
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lo; \
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})
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/* Calculates: result = (X*Y)>>24 */
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#define fixmul24(X,Y) \
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({ \
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int32_t lo; \
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int32_t hi; \
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asm volatile ( \
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"smull %[lo], %[hi], %[x], %[y] \n\t" /* multiply */ \
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"mov %[lo], %[lo], lsr #24 \n\t" /* lo >>= 24 */ \
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"orr %[lo], %[lo], %[hi], lsl #8" /* lo |= (hi << 8) */ \
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: [lo]"=&r"(lo), [hi]"=&r"(hi) \
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: [x]"r"(X), [y]"r"(Y)); \
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lo; \
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})
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/* Calculates: result = (X*Y)>>31 */
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#define fixmul31(X,Y) \
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({ \
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int32_t lo; \
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int32_t hi; \
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asm volatile ( \
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"smull %[lo], %[hi], %[x], %[y] \n\t" /* multiply */ \
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"mov %[lo], %[lo], lsr #31 \n\t" /* lo >>= 31 */ \
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"orr %[lo], %[lo], %[hi], lsl #1" /* lo |= (hi << 1) */ \
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: [lo]"=&r"(lo), [hi]"=&r"(hi) \
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: [x]"r"(X), [y]"r"(Y)); \
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lo; \
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})
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#elif defined(CPU_COLDFIRE)
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/* Calculates: result = (X*Y)>>Z */
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#define fixmulshift(X,Y,Z) \
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({ \
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int32_t t1; \
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int32_t t2; \
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asm volatile ( \
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"mac.l %[x],%[y],%%acc0\n\t" /* multiply */ \
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"mulu.l %[y],%[x] \n\t" /* get lower half, avoid emac stall */ \
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"movclr.l %%acc0,%[t1] \n\t" /* get higher half */ \
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"moveq.l #31,%[t2] \n\t" \
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"sub.l %[sh],%[t2] \n\t" /* t2 = 31 - shift */ \
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"ble.s 1f \n\t" \
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"asl.l %[t2],%[t1] \n\t" /* hi <<= 31 - shift */ \
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"lsr.l %[sh],%[x] \n\t" /* (unsigned)lo >>= shift */ \
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"or.l %[x],%[t1] \n\t" /* combine result */ \
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"bra.s 2f \n\t" \
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"1: \n\t" \
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"neg.l %[t2] \n\t" /* t2 = shift - 31 */ \
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"asr.l %[t2],%[t1] \n\t" /* hi >>= t2 */ \
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"2: \n" \
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: [t1]"=&d"(t1), [t2]"=&d"(t2) \
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: [x] "d"((X)), [y] "d"((Y)), [sh]"d"((Z))); \
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t1; \
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})
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/* Calculates: result = (X*Y)>>16 */
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#define fixmul16(X,Y) \
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({ \
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int32_t t, x = (X); \
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asm volatile ( \
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"mac.l %[x],%[y],%%acc0\n\t" /* multiply */ \
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"mulu.l %[y],%[x] \n\t" /* get lower half, avoid emac stall */ \
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"movclr.l %%acc0,%[t] \n\t" /* get higher half */ \
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"lsr.l #1,%[t] \n\t" /* hi >>= 1 to compensate emac shift */ \
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"move.w %[t],%[x] \n\t" /* combine halfwords */\
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"swap %[x] \n\t" \
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: [t]"=&d"(t), [x] "+d" (x) \
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: [y] "d" ((Y))); \
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x; \
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})
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/* Calculates: result = (X*Y)>>24 */
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#define fixmul24(X,Y) \
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({ \
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int32_t t1, t2; \
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asm volatile ( \
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"mac.l %[x],%[y],%%acc0 \n\t" /* multiply */ \
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"move.l %%accext01, %[t1]\n\t" /* get lower 8 bits */ \
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"movclr.l %%acc0,%[t2] \n\t" /* get higher 24 bits */ \
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"asl.l #7,%[t2] \n\t" /* hi <<= 7, plus one free */ \
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"move.b %[t1],%[t2] \n\t" /* combine result */ \
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: [t1]"=&d"(t1), [t2]"=&d"(t2) \
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: [x] "d" ((X)), [y] "d" ((Y))); \
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t2; \
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})
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/* Calculates: result = (X*Y)>>32 */
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#define fixmul31(X,Y) \
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({ \
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int32_t t; \
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asm volatile ( \
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"mac.l %[x], %[y], %%acc0\n\t" /* multiply */ \
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"movclr.l %%acc0, %[t]\n\t" /* get higher half as result */ \
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: [t] "=d" (t) \
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: [x] "r" ((X)), [y] "r" ((Y))); \
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t; \
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})
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#else
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static inline int32_t fixmulshift(int32_t x, int32_t y, int shamt)
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{
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int64_t temp;
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temp = x;
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temp *= y;
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temp >>= shamt;
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return (int32_t)temp;
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}
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static inline int32_t fixmul31(int32_t x, int32_t y)
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{
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int64_t temp;
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temp = x;
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temp *= y;
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temp >>= 31;
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return (int32_t)temp;
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}
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static inline int32_t fixmul24(int32_t x, int32_t y)
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{
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int64_t temp;
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temp = x;
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temp *= y;
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temp >>= 24;
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return (int32_t)temp;
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}
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static inline int32_t fixmul16(int32_t x, int32_t y)
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{
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int64_t temp;
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temp = x;
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temp *= y;
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temp >>= 16;
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return (int32_t)temp;
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}
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#endif /* CPU_COLDFIRE, CPU_ARM */
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#ifdef CPU_COLDFIRE
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static inline void vector_fixmul_window(int32_t *dst, const int32_t *src0,
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const int32_t *src1, const int32_t *win,
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int len)
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{
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int i, j;
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dst += len;
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win += len;
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src0+= len;
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for(i=-len, j=len-1; i<0; i++, j--) {
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int32_t s0 = src0[i];
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int32_t s1 = src1[j];
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int32_t wi = -win[i];
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int32_t wj = -win[j];
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asm volatile ("mac.l %[s0], %[wj], %%acc0\n\t"
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"msac.l %[s1], %[wi], %%acc0\n\t"
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"mac.l %[s0], %[wi], %%acc1\n\t"
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"mac.l %[s1], %[wj], %%acc1\n\t"
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"movclr.l %%acc0, %[s0]\n\t"
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"move.l %[s0], (%[dst_i])\n\t"
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"movclr.l %%acc1, %[s0]\n\t"
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"move.l %[s0], (%[dst_j])\n\t"
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: [s0] "+r" (s0) /* this register is clobbered so specify it as an input */
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: [dst_i] "a" (&dst[i]), [dst_j] "a" (&dst[j]),
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[s1] "r" (s1), [wi] "r" (wi), [wj] "r" (wj)
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: "cc", "memory");
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}
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}
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#else
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static inline void vector_fixmul_window(int32_t *dst, const int32_t *src0,
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const int32_t *src1, const int32_t *win,
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int len)
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{
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int i, j;
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dst += len;
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win += len;
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src0+= len;
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for(i=-len, j=len-1; i<0; i++, j--) {
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int32_t s0 = src0[i];
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int32_t s1 = src1[j];
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int32_t wi = -win[i];
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int32_t wj = -win[j];
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dst[i] = fixmul31(s0, wj) - fixmul31(s1, wi);
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dst[j] = fixmul31(s0, wi) + fixmul31(s1, wj);
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}
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}
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#endif
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static inline void vector_fixmul_scalar(int32_t *dst, const int32_t *src,
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int32_t mul, int len)
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{
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int i;
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for(i=0; i<len; i++)
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dst[i] = fixmul24(src[i], mul);
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}
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static inline int av_clip(int a, int amin, int amax)
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{
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if (a < amin) return amin;
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else if (a > amax) return amax;
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else return a;
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}
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#endif /* _WMAPRO_MATH_H_ */
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