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| author | Jens Arnold <amiconn@rockbox.org> | 2008-10-07 20:52:42 +0000 |
|---|---|---|
| committer | Jens Arnold <amiconn@rockbox.org> | 2008-10-07 20:52:42 +0000 |
| commit | dd7cacdc884a1dcd79256760f1b5677e9a142490 (patch) | |
| tree | 6150583630f57b5edcd9c42eede9042979c33bce /apps/codecs/demac/libdemac/vector_math16_armv6.h | |
| parent | d07ac657a428754b177a894959fba03474b181a8 (diff) | |
| download | rockbox-dd7cacdc884a1dcd79256760f1b5677e9a142490.tar.gz rockbox-dd7cacdc884a1dcd79256760f1b5677e9a142490.zip | |
Another minor improvement: better pipelining and one less register used in vector addition/ subtraction.
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@18739 a1c6a512-1295-4272-9138-f99709370657
Diffstat (limited to 'apps/codecs/demac/libdemac/vector_math16_armv6.h')
| -rw-r--r-- | apps/codecs/demac/libdemac/vector_math16_armv6.h | 30 |
1 files changed, 16 insertions, 14 deletions
diff --git a/apps/codecs/demac/libdemac/vector_math16_armv6.h b/apps/codecs/demac/libdemac/vector_math16_armv6.h index e180429193..49fa2ceb7d 100644 --- a/apps/codecs/demac/libdemac/vector_math16_armv6.h +++ b/apps/codecs/demac/libdemac/vector_math16_armv6.h @@ -39,37 +39,38 @@ static inline void vector_add(int16_t* v1, int16_t* v2) "10: \n" "ldrh r4, [%[v2]], #2 \n" + "ldr r5, [%[v2]], #4 \n" "mov r4, r4, lsl #16 \n" "1: \n" - "ldmia %[v2]!, {r5-r8} \n" + "ldmia %[v2]!, {r6-r7} \n" "ldmia %[v1], {r0-r3} \n" "mov r5, r5, ror #16 \n" "pkhtb r4, r5, r4, asr #16 \n" "sadd16 r0, r0, r4 \n" "pkhbt r5, r5, r6, lsl #16 \n" "sadd16 r1, r1, r5 \n" + "ldmia %[v2]!, {r4-r5} \n" "mov r7, r7, ror #16 \n" "pkhtb r6, r7, r6, asr #16 \n" "sadd16 r2, r2, r6 \n" - "pkhbt r7, r7, r8, lsl #16 \n" + "pkhbt r7, r7, r4, lsl #16 \n" "sadd16 r3, r3, r7 \n" "stmia %[v1]!, {r0-r3} \n" - "mov r4, r8 \n" - "ldmia %[v2]!, {r5-r8} \n" + "ldmia %[v2]!, {r6-r7} \n" "ldmia %[v1], {r0-r3} \n" "mov r5, r5, ror #16 \n" "pkhtb r4, r5, r4, asr #16 \n" "sadd16 r0, r0, r4 \n" "pkhbt r5, r5, r6, lsl #16 \n" "sadd16 r1, r1, r5 \n" + "ldmia %[v2]!, {r4-r5} \n" "mov r7, r7, ror #16 \n" "pkhtb r6, r7, r6, asr #16 \n" "sadd16 r2, r2, r6 \n" - "pkhbt r7, r7, r8, lsl #16 \n" + "pkhbt r7, r7, r4, lsl #16 \n" "sadd16 r3, r3, r7 \n" "stmia %[v1]!, {r0-r3} \n" #if ORDER > 16 - "mov r4, r8 \n" "subs %[cnt], %[cnt], #1 \n" "bne 1b \n" #endif @@ -106,7 +107,7 @@ static inline void vector_add(int16_t* v1, int16_t* v2) : /* inputs */ : /* clobbers */ "r0", "r1", "r2", "r3", "r4", - "r5", "r6", "r7", "r8", "memory" + "r5", "r6", "r7", "memory" ); } @@ -125,37 +126,38 @@ static inline void vector_sub(int16_t* v1, int16_t* v2) "10: \n" "ldrh r4, [%[v2]], #2 \n" + "ldr r5, [%[v2]], #4 \n" "mov r4, r4, lsl #16 \n" "1: \n" - "ldmia %[v2]!, {r5-r8} \n" + "ldmia %[v2]!, {r6-r7} \n" "ldmia %[v1], {r0-r3} \n" "mov r5, r5, ror #16 \n" "pkhtb r4, r5, r4, asr #16 \n" "ssub16 r0, r0, r4 \n" "pkhbt r5, r5, r6, lsl #16 \n" "ssub16 r1, r1, r5 \n" + "ldmia %[v2]!, {r4-r5} \n" "mov r7, r7, ror #16 \n" "pkhtb r6, r7, r6, asr #16 \n" "ssub16 r2, r2, r6 \n" - "pkhbt r7, r7, r8, lsl #16 \n" + "pkhbt r7, r7, r4, lsl #16 \n" "ssub16 r3, r3, r7 \n" "stmia %[v1]!, {r0-r3} \n" - "mov r4, r8 \n" - "ldmia %[v2]!, {r5-r8} \n" + "ldmia %[v2]!, {r6-r7} \n" "ldmia %[v1], {r0-r3} \n" "mov r5, r5, ror #16 \n" "pkhtb r4, r5, r4, asr #16 \n" "ssub16 r0, r0, r4 \n" "pkhbt r5, r5, r6, lsl #16 \n" "ssub16 r1, r1, r5 \n" + "ldmia %[v2]!, {r4-r5} \n" "mov r7, r7, ror #16 \n" "pkhtb r6, r7, r6, asr #16 \n" "ssub16 r2, r2, r6 \n" - "pkhbt r7, r7, r8, lsl #16 \n" + "pkhbt r7, r7, r4, lsl #16 \n" "ssub16 r3, r3, r7 \n" "stmia %[v1]!, {r0-r3} \n" #if ORDER > 16 - "mov r4, r8 \n" "subs %[cnt], %[cnt], #1 \n" "bne 1b \n" #endif @@ -192,7 +194,7 @@ static inline void vector_sub(int16_t* v1, int16_t* v2) : /* inputs */ : /* clobbers */ "r0", "r1", "r2", "r3", "r4", - "r5", "r6", "r7", "r8", "memory" + "r5", "r6", "r7", "memory" ); } |