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| author | Josh Coalson <jcoalson@users.sourceforce.net> | 2007-04-04 01:02:21 +0000 |
|---|---|---|
| committer | Josh Coalson <jcoalson@users.sourceforce.net> | 2007-04-04 01:02:21 +0000 |
| commit | 566f373d713a8cb9b75fe3f6e7d34b02b254e89a (patch) | |
| tree | 143519057650fcae6f0c3a00fbb77d8430aad5d0 /src/libFLAC/ia32/stream_encoder_asm.nasm | |
| parent | 717ea8c39834f170094ae4363ff4fe3e66089c5b (diff) | |
| download | flac-566f373d713a8cb9b75fe3f6e7d34b02b254e89a.tar.gz | |
minor optimization in loop logic
Diffstat (limited to 'src/libFLAC/ia32/stream_encoder_asm.nasm')
| -rw-r--r-- | src/libFLAC/ia32/stream_encoder_asm.nasm | 10 |
1 files changed, 4 insertions, 6 deletions
diff --git a/src/libFLAC/ia32/stream_encoder_asm.nasm b/src/libFLAC/ia32/stream_encoder_asm.nasm index 17990675..617cd94e 100644 --- a/src/libFLAC/ia32/stream_encoder_asm.nasm +++ b/src/libFLAC/ia32/stream_encoder_asm.nasm @@ -93,27 +93,25 @@ cident precompute_partition_info_sums_32bit_asm_ia32_ xor esi, esi ; esi <- residual_sample = 0 ALIGN 16 .loop0: ; for(partition = residual_sample = 0; partition < partitions; partition++) { - cmp ecx, [esp] - jae .next0 add edi, [esp + 4] ; end += default_partition_samples; xor ebx, ebx ; abs_residual_partition_sum = 0; ALIGN 16;@@@ OPT: remove? .loop1: ; for( ; residual_sample < end; residual_sample++) - cmp esi, edi - jae .next1 mov eax, [ebp + esi * 4] cdq xor eax, edx sub eax, edx add ebx, eax ; abs_residual_partition_sum += abs(residual[residual_sample]); add esi, byte 1 - jmp .loop1 + cmp esi, edi ; /* since the loop will always run at least once, we can put the loop check down here */ + jb .loop1 .next1: mov eax, [esp + 32] mov [eax + ecx * 8], ebx ; abs_residual_partition_sums[partition] = abs_residual_partition_sum; mov [eax + ecx * 8 + 4], dword 0 add ecx, byte 1 - jmp .loop0 + cmp ecx, [esp] ; /* since the loop will always run at least once, we can put the loop check down here */ + jb .loop0 .next0: ; } ; ; now merge partitions for lower orders |