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Add Coldfire and ARM assembler for "reverse multiply and copy" function too. Gives big speedup on Coldfire, small on ARM.

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git-svn-id: svn://svn.rockbox.org/rockbox/trunk@15183 a1c6a512-1295-4272-9138-f99709370657
This commit is contained in:
Thom Johansen 2007-10-18 10:09:21 +00:00
parent 31245682b3
commit 6e4aa260d0
1 changed files with 61 additions and 4 deletions
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65
apps/codecs/libwma/wmadeci.c
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@ -96,12 +96,33 @@ void vector_fmul_add_add(fixed32 *dst, const fixed32 *data,
"smull r8, r9, r1, r5;"
"add r1, r4, r9, lsl #1;"
"stmia %[dst]!, {r0, r1};"
"subs %[n], %[n], #2;"
"bne 0b;"
"subs %[n], %[n], #2;"
"bne 0b;"
: [d] "+r" (data), [w] "+r" (window), [dst] "+r" (dst), [n] "+r" (n)
: : "r0", "r1", "r4", "r5", "r8", "r9", "memory", "cc");
}
static inline
void vector_fmul_reverse(fixed32 *dst, const fixed32 *src0, const fixed32 *src1,
int len)
{
/* Block sizes are always power of two */
asm volatile (
"add %[s1], %[s1], %[n], lsl #2;"
"0:"
"ldmia %[s0]!, {r0, r1};"
"ldmdb %[s1]!, {r4, r5};"
"smull r8, r9, r0, r5;"
"mov r0, r9, lsl #1;"
"smull r8, r9, r1, r4;"
"mov r1, r9, lsl #1;"
"stmia %[dst]!, {r0, r1};"
"subs %[n], %[n], #2;"
"bne 0b;"
: [s0] "+r" (src0), [s1] "+r" (src1), [dst] "+r" (dst), [n] "+r" (len)
: : "r0", "r1", "r4", "r5", "r8", "r9", "memory", "cc");
}
#elif defined(CPU_COLDFIRE)
static inline
@ -118,8 +139,8 @@ void vector_fmul_add_add(fixed32 *dst, const fixed32 *data,
"mac.l %%d1, %%d5, %%acc1;"
"mac.l %%d2, %%a0, %%acc2;"
"mac.l %%d3, %%a1, %%acc3;"
"lea.l (%[d], 16), %[d];"
"lea.l (%[w], 16), %[w];"
"lea.l (16, %[d]), %[d];"
"lea.l (16, %[w]), %[w];"
"movclr.l %%acc0, %%d0;"
"movclr.l %%acc1, %%d1;"
"movclr.l %%acc2, %%d2;"
@ -134,6 +155,35 @@ void vector_fmul_add_add(fixed32 *dst, const fixed32 *data,
: : "d0", "d1", "d2", "d3", "d4", "d5", "a0", "a1", "memory", "cc");
}
static inline
void vector_fmul_reverse(fixed32 *dst, const fixed32 *src0, const fixed32 *src1,
int len)
{
/* Block sizes are always power of two. Smallest block is always way bigger
* than four too.*/
asm volatile (
"lea.l (-16, %[s1], %[n]*4), %[s1];"
"0:"
"movem.l (%[s0]), %%d0-%%d3;"
"movem.l (%[s1]), %%d4-%%d5/%%a0-%%a1;"
"mac.l %%d0, %%a1, %%acc0;"
"mac.l %%d1, %%a0, %%acc1;"
"mac.l %%d2, %%d5, %%acc2;"
"mac.l %%d3, %%d4, %%acc3;"
"lea.l (16, %[s0]), %[s0];"
"lea.l (-16, %[s1]), %[s1];"
"movclr.l %%acc0, %%d0;"
"movclr.l %%acc1, %%d1;"
"movclr.l %%acc2, %%d2;"
"movclr.l %%acc3, %%d3;"
"movem.l %%d0-%%d3, (%[dst]);"
"lea.l (16, %[dst]), %[dst];"
"subq.l #4, %[n];"
"jne 0b;"
: [s0] "+a" (src0), [s1] "+a" (src1), [dst] "+a" (dst), [n] "+d" (len)
: : "d0", "d1", "d2", "d3", "d4", "d5", "a0", "a1", "memory", "cc");
}
#else
static inline void vector_fmul_add_add(fixed32 *dst, const fixed32 *src0, const fixed32 *src1, int len){
@ -142,6 +192,13 @@ static inline void vector_fmul_add_add(fixed32 *dst, const fixed32 *src0, const
dst[i] = fixmul32b(src0[i], src1[i]) + dst[i];
}
static inline void vector_fmul_reverse(fixed32 *dst, const fixed32 *src0, const fixed32 *src1, int len){
int i;
src1 += len-1;
for(i=0; i<len; i++)
dst[i] = fixmul32b(src0[i], src1[-i]);
}
#endif
/* TODO: Adapt the above to work with this */