#ifndef _WMAPRO_MATH_H_ #define _WMAPRO_MATH_H_ #include /* 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 amax) return amax; else return a; } #endif /* _WMAPRO_MATH_H_ */