/*************************************************************************** * __________ __ ___. * Open \______ \ ____ ____ | | _\_ |__ _______ ___ * Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ / * Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < < * Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \ * \/ \/ \/ \/ \/ * * Copyright (C) 2005 by Pedro Vasconcelos * * All files in this archive are subject to the GNU General Public License. * See the file COPYING in the source tree root for full license agreement. * * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY * KIND, either express or implied. * ****************************************************************************/ /* asm routines for wide math on the MCF5249 */ #include "os_types.h" #if CONFIG_CPU == MCF5249 && !defined(SIMULATOR) /* attribute for 16-byte alignment */ #define LINE_ATTR __attribute__ ((aligned (16))) #ifndef _V_WIDE_MATH #define _V_WIDE_MATH #define MB() static inline void mcf5249_init_mac(void) { asm volatile ("move.l #0x20, %macsr;"); /* frac, truncate, no saturation */ } static inline ogg_int32_t MULT32(ogg_int32_t x, ogg_int32_t y) { asm volatile ("mac.l %[x], %[y], %%acc0;" /* multiply & shift */ "movclr.l %%acc0, %[x];" /* move & clear acc */ "asr.l #1, %[x];" /* no overflow test */ : [x] "+&d" (x) : [y] "r" (y) : "cc"); return x; } static inline ogg_int32_t MULT31(ogg_int32_t x, ogg_int32_t y) { asm volatile ("mac.l %[x], %[y], %%acc0;" /* multiply */ "movclr.l %%acc0, %[x];" /* move and clear */ : [x] "+&r" (x) : [y] "r" (y) : "cc"); return x; } static inline ogg_int32_t MULT31_SHIFT15(ogg_int32_t x, ogg_int32_t y) { ogg_int32_t r; asm volatile ("mac.l %[x], %[y], %%acc0;" /* multiply */ "movclr.l %%acc0, %[r];" /* get higher half */ "mulu.l %[y], %[x];" /* get lower half */ "asl.l #8, %[r];" /* hi<<16, plus one free */ "asl.l #8, %[r];" "lsr.l #8, %[x];" /* (unsigned)lo >> 15 */ "lsr.l #7, %[x];" "or.l %[x], %[r];" /* logical-or results */ : [r] "=&d" (r), [x] "+d" (x) : [y] "d" (y) : "cc"); return r; } static inline void XPROD31(ogg_int32_t a, ogg_int32_t b, ogg_int32_t t, ogg_int32_t v, ogg_int32_t *x, ogg_int32_t *y) { asm volatile ("mac.l %[a], %[t], %%acc0;" "mac.l %[b], %[v], %%acc0;" "mac.l %[b], %[t], %%acc1;" "msac.l %[a], %[v], %%acc1;" "movclr.l %%acc0, %[a];" "move.l %[a], (%[x]);" "movclr.l %%acc1, %[a];" "move.l %[a], (%[y]);" : [a] "+&r" (a) : [x] "a" (x), [y] "a" (y), [b] "r" (b), [t] "r" (t), [v] "r" (v) : "cc", "memory"); } static inline void XNPROD31(ogg_int32_t a, ogg_int32_t b, ogg_int32_t t, ogg_int32_t v, ogg_int32_t *x, ogg_int32_t *y) { asm volatile ("mac.l %[a], %[t], %%acc0;" "msac.l %[b], %[v], %%acc0;" "mac.l %[b], %[t], %%acc1;" "mac.l %[a], %[v], %%acc1;" "movclr.l %%acc0, %[a];" "move.l %[a], (%[x]);" "movclr.l %%acc1, %[a];" "move.l %[a], (%[y]);" : [a] "+&r" (a) : [x] "a" (x), [y] "a" (y), [b] "r" (b), [t] "r" (t), [v] "r" (v) : "cc", "memory"); } #if 0 /* canonical Tremor definition */ #define XPROD32(_a, _b, _t, _v, _x, _y) \ { (_x)=MULT32(_a,_t)+MULT32(_b,_v); \ (_y)=MULT32(_b,_t)-MULT32(_a,_v); } #endif /* this could lose the LSB by overflow, but i don't think it'll ever happen. if anyone think they can hear a bug caused by this, please try the above version. */ #define XPROD32(_a, _b, _t, _v, _x, _y) \ asm volatile ("mac.l %[a], %[t], %%acc0;" \ "mac.l %[b], %[v], %%acc0;" \ "mac.l %[b], %[t], %%acc1;" \ "msac.l %[a], %[v], %%acc1;" \ "movclr.l %%acc0, %[x];" \ "asr.l #1, %[x];" \ "movclr.l %%acc1, %[y];" \ "asr.l #1, %[y];" \ : [x] "=&d" (_x), [y] "=&d" (_y) \ : [a] "r" (_a), [b] "r" (_b), \ [t] "r" (_t), [v] "r" (_v) \ : "cc"); /* asm versions of vector operations for block.c, window.c */ /* assumes MAC is initialized & accumulators cleared */ static inline void mcf5249_vect_add(ogg_int32_t *x, ogg_int32_t *y, int n) { /* align to 16 bytes */ while(n>0 && (int)x&16) { *x++ += *y++; n--; } asm volatile ("bra 1f;" "0:" /* loop start */ "movem.l (%[x]), %%d0-%%d3;" /* fetch values */ "movem.l (%[y]), %%a0-%%a3;" /* add */ "add.l %%a0, %%d0;" "add.l %%a1, %%d1;" "add.l %%a2, %%d2;" "add.l %%a3, %%d3;" /* store and advance */ "movem.l %%d0-%%d3, (%[x]);" "lea.l (4*4, %[x]), %[x];" "lea.l (4*4, %[y]), %[y];" "subq.l #4, %[n];" /* done 4 elements */ "1: cmpi.l #4, %[n];" "bge 0b;" : [n] "+d" (n), [x] "+a" (x), [y] "+a" (y) : : "%d0", "%d1", "%d2", "%d3", "%a0", "%a1", "%a2", "%a3", "cc", "memory"); /* add final elements */ while (n>0) { *x++ += *y++; n--; } } static inline void mcf5249_vect_copy(ogg_int32_t *x, ogg_int32_t *y, int n) { /* align to 16 bytes */ while(n>0 && (int)x&16) { *x++ = *y++; n--; } asm volatile ("bra 1f;" "0:" /* loop start */ "movem.l (%[y]), %%d0-%%d3;" /* fetch values */ "movem.l %%d0-%%d3, (%[x]);" /* store */ "lea.l (4*4, %[x]), %[x];" /* advance */ "lea.l (4*4, %[y]), %[y];" "subq.l #4, %[n];" /* done 4 elements */ "1: cmpi.l #4, %[n];" "bge 0b;" : [n] "+d" (n), [x] "+a" (x), [y] "+a" (y) : : "%d0", "%d1", "%d2", "%d3", "cc", "memory"); /* copy final elements */ while (n>0) { *x++ = *y++; n--; } } static inline void mcf5249_vect_mult_fw(ogg_int32_t *data, LOOKUP_T *window, int n) { /* ensure data is aligned to 16-bytes */ while(n>0 && (int)data%16) { *data = MULT31(*data, *window); data++; window++; n--; } asm volatile ("movem.l (%[d]), %%d0-%%d3;" /* loop start */ "movem.l (%[w]), %%a0-%%a3;" /* pre-fetch registers */ "lea.l (4*4, %[w]), %[w];" "bra 1f;" /* jump to loop condition */ "0:" /* loop body */ /* multiply and load next window values */ "mac.l %%d0, %%a0, (%[w])+, %%a0, %%acc0;" "mac.l %%d1, %%a1, (%[w])+, %%a1, %%acc1;" "mac.l %%d2, %%a2, (%[w])+, %%a2, %%acc2;" "mac.l %%d3, %%a3, (%[w])+, %%a3, %%acc3;" "movclr.l %%acc0, %%d0;" /* get the products */ "movclr.l %%acc1, %%d1;" "movclr.l %%acc2, %%d2;" "movclr.l %%acc3, %%d3;" /* store and advance */ "movem.l %%d0-%%d3, (%[d]);" "lea.l (4*4, %[d]), %[d];" "movem.l (%[d]), %%d0-%%d3;" "subq.l #4, %[n];" /* done 4 elements */ "1: cmpi.l #4, %[n];" "bge 0b;" /* multiply final elements */ "tst.l %[n];" "beq 1f;" /* n=0 */ "mac.l %%d0, %%a0, %%acc0;" "movclr.l %%acc0, %%d0;" "move.l %%d0, (%[d])+;" "subq.l #1, %[n];" "beq 1f;" /* n=1 */ "mac.l %%d1, %%a1, %%acc0;" "movclr.l %%acc0, %%d1;" "move.l %%d1, (%[d])+;" "subq.l #1, %[n];" "beq 1f;" /* n=2 */ /* otherwise n = 3 */ "mac.l %%d2, %%a2, %%acc0;" "movclr.l %%acc0, %%d2;" "move.l %%d2, (%[d])+;" "1:" : [n] "+d" (n), [d] "+a" (data), [w] "+a" (window) : : "%d0", "%d1", "%d2", "%d3", "%a0", "%a1", "%a2", "%a3", "cc", "memory"); } static inline void mcf5249_vect_mult_bw(ogg_int32_t *data, LOOKUP_T *window, int n) { /* ensure at least data is aligned to 16-bytes */ while(n>0 && (int)data%16) { *data = MULT31(*data, *window); data++; window--; n--; } asm volatile ("lea.l (-3*4, %[w]), %[w];" /* loop start */ "movem.l (%[d]), %%d0-%%d3;" /* pre-fetch registers */ "movem.l (%[w]), %%a0-%%a3;" "bra 1f;" /* jump to loop condition */ "0:" /* loop body */ /* multiply and load next window value */ "mac.l %%d0, %%a3, -(%[w]), %%a3, %%acc0;" "mac.l %%d1, %%a2, -(%[w]), %%a2, %%acc1;" "mac.l %%d2, %%a1, -(%[w]), %%a1, %%acc2;" "mac.l %%d3, %%a0, -(%[w]), %%a0, %%acc3;" "movclr.l %%acc0, %%d0;" /* get the products */ "movclr.l %%acc1, %%d1;" "movclr.l %%acc2, %%d2;" "movclr.l %%acc3, %%d3;" /* store and advance */ "movem.l %%d0-%%d3, (%[d]);" "lea.l (4*4, %[d]), %[d];" "movem.l (%[d]), %%d0-%%d3;" "subq.l #4, %[n];" /* done 4 elements */ "1: cmpi.l #4, %[n];" "bge 0b;" /* multiply final elements */ "tst.l %[n];" "beq 1f;" /* n=0 */ "mac.l %%d0, %%a3, %%acc0;" "movclr.l %%acc0, %%d0;" "move.l %%d0, (%[d])+;" "subq.l #1, %[n];" "beq 1f;" /* n=1 */ "mac.l %%d1, %%a2, %%acc0;" "movclr.l %%acc0, %%d1;" "move.l %%d1, (%[d])+;" "subq.l #1, %[n];" "beq 1f;" /* n=2 */ /* otherwise n = 3 */ "mac.l %%d2, %%a1, %%acc0;" "movclr.l %%acc0, %%d2;" "move.l %%d2, (%[d])+;" "1:" : [n] "+d" (n), [d] "+a" (data), [w] "+a" (window) : : "%d0", "%d1", "%d2", "%d3", "%a0", "%a1", "%a2", "%a3", "cc", "memory"); } #if 0 /* this routine is subsumed by Jens' asm optimised memset which appears to be more efficient anyway; will eventually be deleted */ static inline void mcf5249_vect_zero(ogg_int32_t *ptr, int n) { /* ensure ptr is aligned to 16-bytes */ while(n>0 && (int)ptr%16) { *ptr++ = 0; n--; } asm volatile ("clr.l %%d0;" "clr.l %%d1;" "clr.l %%d2;" "clr.l %%d3;" /* loop start */ "tst.l %[n];" "bra 1f;" "0: movem.l %%d0-%%d3, (%[ptr]);" "lea (4*4, %[ptr]), %[ptr];" "subq.l #4, %[n];" /* done 4 elements */ "1: bgt 0b;" : [n] "+d" (n), [ptr] "+a" (ptr) : : "%d0","%d1","%d2","%d3","cc","memory"); /* clear remaining elements */ while(n>0) { *ptr++ = 0; n--; } } #endif #endif #ifndef _V_CLIP_MATH #define _V_CLIP_MATH /* this is portable C and simple; why not use this as default? */ static inline ogg_int32_t CLIP_TO_15(register ogg_int32_t x) { register ogg_int32_t hi=32767, lo=-32768; return (x>=hi ? hi : (x<=lo ? lo : x)); } #endif #else #define LINE_ATTR #endif