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-rw-r--r--apps/codecs/libwmapro/wmapro_math.h250
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diff --git a/apps/codecs/libwmapro/wmapro_math.h b/apps/codecs/libwmapro/wmapro_math.h
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--- a/apps/codecs/libwmapro/wmapro_math.h
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-#ifndef _WMAPRO_MATH_H_
-#define _WMAPRO_MATH_H_
-
-#include <inttypes.h>
-
-/* rockbox: not used
-#define fixtof16(x) (float)((float)(x) / (float)(1 << 16))
-#define fixtof31(x) (float)((float)(x) / (float)(1 << 31))
-#define ftofix16(x) ((int32_t)((x) * (float)(1 << 16) + ((x) < 0 ? -0.5:0.5)))
-#define ftofix31(x) ((int32_t)((x) * (float)(1 << 31) + ((x) < 0 ? -0.5:0.5)))
-*/
-
-#if defined(CPU_ARM)
- /* Calculates: result = (X*Y)>>Z */
- #define fixmulshift(X,Y,Z) \
- ({ \
- int32_t lo; \
- int32_t hi; \
- asm volatile ( \
- "smull %[lo], %[hi], %[x], %[y] \n\t" /* multiply */ \
- "mov %[lo], %[lo], lsr %[shr] \n\t" /* lo >>= Z */ \
- "orr %[lo], %[lo], %[hi], lsl %[shl]" /* lo |= (hi << (32-Z)) */ \
- : [lo]"=&r"(lo), [hi]"=&r"(hi) \
- : [x]"r"(X), [y]"r"(Y), [shr]"r"(Z), [shl]"r"(32-Z)); \
- lo; \
- })
-
- /* Calculates: result = (X*Y)>>16 */
- #define fixmul16(X,Y) \
- ({ \
- int32_t lo; \
- int32_t hi; \
- asm volatile ( \
- "smull %[lo], %[hi], %[x], %[y] \n\t" /* multiply */ \
- "mov %[lo], %[lo], lsr #16 \n\t" /* lo >>= 16 */ \
- "orr %[lo], %[lo], %[hi], lsl #16" /* lo |= (hi << 16) */ \
- : [lo]"=&r"(lo), [hi]"=&r"(hi) \
- : [x]"r"(X), [y]"r"(Y)); \
- lo; \
- })
-
- /* Calculates: result = (X*Y)>>24 */
- #define fixmul24(X,Y) \
- ({ \
- int32_t lo; \
- int32_t hi; \
- asm volatile ( \
- "smull %[lo], %[hi], %[x], %[y] \n\t" /* multiply */ \
- "mov %[lo], %[lo], lsr #24 \n\t" /* lo >>= 24 */ \
- "orr %[lo], %[lo], %[hi], lsl #8" /* lo |= (hi << 8) */ \
- : [lo]"=&r"(lo), [hi]"=&r"(hi) \
- : [x]"r"(X), [y]"r"(Y)); \
- lo; \
- })
-
- /* Calculates: result = (X*Y)>>31, loose 1 bit precision */
- #define fixmul31(X,Y) \
- ({ \
- int32_t lo; \
- int32_t hi; \
- asm volatile ( \
- "smull %[lo], %[hi], %[x], %[y] \n\t" /* multiply */ \
- "mov %[hi], %[hi], lsl #1" /* hi <<= 1 */ \
- : [lo]"=&r"(lo), [hi]"=&r"(hi) \
- : [x]"r"(X), [y]"r"(Y)); \
- hi; \
- })
-#elif defined(CPU_COLDFIRE)
- /* Calculates: result = (X*Y)>>Z */
- #define fixmulshift(X,Y,Z) \
- ({ \
- int32_t t1; \
- int32_t t2; \
- asm volatile ( \
- "mac.l %[x],%[y],%%acc0\n\t" /* multiply */ \
- "mulu.l %[y],%[x] \n\t" /* get lower half, avoid emac stall */ \
- "movclr.l %%acc0,%[t1] \n\t" /* get higher half */ \
- "moveq.l #31,%[t2] \n\t" \
- "sub.l %[sh],%[t2] \n\t" /* t2 = 31 - shift */ \
- "ble.s 1f \n\t" \
- "asl.l %[t2],%[t1] \n\t" /* hi <<= 31 - shift */ \
- "lsr.l %[sh],%[x] \n\t" /* (unsigned)lo >>= shift */ \
- "or.l %[x],%[t1] \n\t" /* combine result */ \
- "bra.s 2f \n\t" \
- "1: \n\t" \
- "neg.l %[t2] \n\t" /* t2 = shift - 31 */ \
- "asr.l %[t2],%[t1] \n\t" /* hi >>= t2 */ \
- "2: \n" \
- : [t1]"=&d"(t1), [t2]"=&d"(t2) \
- : [x] "d"((X)), [y] "d"((Y)), [sh]"d"((Z))); \
- t1; \
- })
-
- /* Calculates: result = (X*Y)>>16 */
- #define fixmul16(X,Y) \
- ({ \
- int32_t t, x = (X); \
- asm volatile ( \
- "mac.l %[x],%[y],%%acc0\n\t" /* multiply */ \
- "mulu.l %[y],%[x] \n\t" /* get lower half, avoid emac stall */ \
- "movclr.l %%acc0,%[t] \n\t" /* get higher half */ \
- "lsr.l #1,%[t] \n\t" /* hi >>= 1 to compensate emac shift */ \
- "move.w %[t],%[x] \n\t" /* combine halfwords */\
- "swap %[x] \n\t" \
- : [t]"=&d"(t), [x] "+d" (x) \
- : [y] "d" ((Y))); \
- x; \
- })
-
- /* Calculates: result = (X*Y)>>31 (may lose msb to overflow) */
- #define fixmul31(X,Y) \
- ({ \
- int32_t t; \
- asm volatile ( \
- "mac.l %[x], %[y], %%acc0\n\t" /* multiply */ \
- "movclr.l %%acc0, %[t]\n\t" /* get higher half as result */ \
- : [t] "=d" (t) \
- : [x] "r" ((X)), [y] "r" ((Y))); \
- t; \
- })
-#else
- static inline int32_t fixmulshift(int32_t x, int32_t y, int shamt)
- {
- int64_t temp;
- temp = x;
- temp *= y;
-
- temp >>= shamt;
-
- return (int32_t)temp;
- }
-
- static inline int32_t fixmul31(int32_t x, int32_t y)
- {
- int64_t temp;
- temp = x;
- temp *= y;
-
- temp >>= 31;
-
- return (int32_t)temp;
- }
-
- static inline int32_t fixmul24(int32_t x, int32_t y)
- {
- int64_t temp;
- temp = x;
- temp *= y;
-
- temp >>= 24;
-
- return (int32_t)temp;
- }
-
- static inline int32_t fixmul16(int32_t x, int32_t y)
- {
- int64_t temp;
- temp = x;
- temp *= y;
-
- temp >>= 16;
-
- return (int32_t)temp;
- }
-#endif /* CPU_COLDFIRE, CPU_ARM */
-
-#if defined(CPU_COLDFIRE)
- #define VECT_MUL_WIN_KERNEL(i, j, s0, s1, wi, wj) \
- asm volatile ( \
- "mac.l %[s0], %[wj], %%acc0 \n\t" \
- "msac.l %[s1], %[wi], %%acc0 \n\t" \
- "mac.l %[s0], %[wi], %%acc1 \n\t" \
- "mac.l %[s1], %[wj], %%acc1 \n\t" \
- "movclr.l %%acc0, %[s0] \n\t" \
- "move.l %[s0], (%[dst_i]) \n\t" \
- "movclr.l %%acc1, %[s0] \n\t" \
- "move.l %[s0], (%[dst_j]) \n\t" \
- : [s0] "+r" (s0) /* register is clobbered so specify it as an input */ \
- : [dst_i] "a" (&dst[i]), [dst_j] "a" (&dst[j]), \
- [s1] "r" (s1), [wi] "r" (wi), [wj] "r" (wj) \
- : "cc", "memory");
-#else
- #define VECT_MUL_WIN_KERNEL(i, j, s0, s1, wi, wj) \
- dst[i] = fixmul31(wj, s0) - fixmul31(wi, s1); \
- dst[j] = fixmul31(wi, s0) + fixmul31(wj, s1);
-#endif /* CPU_COLDFIRE */
-
-static inline void vector_fixmul_window(int32_t *dst, const int32_t *src0,
- const int32_t *src1, const int32_t *win,
- int len)
-{
- int i, j;
- dst += len;
- win += len;
- src0+= len;
- for(i=-len, j=len-1; i<0; i++, j--) {
- int32_t s0 = src0[i]; /* s0 = src0[ 0 ... len-1] */
- int32_t s1 = src1[j]; /* s1 = src1[2*len-1 ... len] */
- int32_t wi = -win[i]; /* wi = -win[ 0 ... len-1] */
- int32_t wj = -win[j]; /* wj = -win[2*len-1 ... len] */
- VECT_MUL_WIN_KERNEL(i, j, s0, s1, wi, wj);
- }
-}
-
-#if defined(CPU_ARM)
- #define VECT_MUL_SCALAR_KERNEL(dst, src, mul) \
- asm volatile ( \
- "ldmia %[src]!, {r1-r4} \n\t" \
- "smull r0, r5, r1, %[mul] \n\t" \
- "mov r0, r0, lsr #16 \n\t" \
- "orr r0, r0, r5, lsl #16\n\t" \
- "smull r1, r5, r2, %[mul] \n\t" \
- "mov r1, r1, lsr #16 \n\t" \
- "orr r1, r1, r5, lsl #16\n\t" \
- "smull r2, r5, r3, %[mul] \n\t" \
- "mov r2, r2, lsr #16 \n\t" \
- "orr r2, r2, r5, lsl #16\n\t" \
- "smull r3, r5, r4, %[mul] \n\t" \
- "mov r3, r3, lsr #16 \n\t" \
- "orr r3, r3, r5, lsl #16\n\t" \
- "stmia %[dst]!, {r0-r3} \n" \
- : [dst]"+r"(dst), [src]"+r"(src) \
- : [mul]"r"(mul) \
- : "r0", "r1", "r2", "r3", "r4", "r5", "memory");
-#else
- #define VECT_MUL_SCALAR_KERNEL(dst, src, mul) \
- dst[i ] = fixmul16(src[i ], mul); \
- dst[i+1] = fixmul16(src[i+1], mul); \
- dst[i+2] = fixmul16(src[i+2], mul); \
- dst[i+3] = fixmul16(src[i+3], mul);
-#endif /* CPU_ARM, CPU_COLDFIRE */
-
-static inline void vector_fixmul_scalar(int32_t *dst, const int32_t *src,
- int32_t mul, int len)
-{
- /* len is _always_ a multiple of 4, because len is the difference of sfb's
- * which themselves are always a multiple of 4. */
- int i;
- for (i=0; i<len; i+=4) {
- VECT_MUL_SCALAR_KERNEL(dst, src, mul);
- }
-}
-
-static inline int av_clip(int a, int amin, int amax)
-{
- if (a < amin) return amin;
- else if (a > amax) return amax;
- else return a;
-}
-#endif /* _WMAPRO_MATH_H_ */
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