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more optimizations

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This commit is contained in:
Josh Coalson 2007-04-04 01:03:07 +00:00
parent 566f373d71
commit 7834f80a78
1 changed files with 8 additions and 7 deletions
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15
src/libFLAC/ia32/stream_encoder_asm.nasm
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@ -86,16 +86,15 @@ cident precompute_partition_info_sums_32bit_asm_ia32_
;
; first do max_partition_order
;
mov edi, [esp + 40]
neg edi ; edi <- end = (unsigned)(-(int)predictor_order)
mov edi, [esp + 4]
sub edi, [esp + 40] ; edi <- end = (unsigned)(-(int)predictor_order) + default_partition_samples
xor esi, esi ; esi <- residual_sample = 0
xor ecx, ecx ; ecx <- partition = 0
mov ebp, [esp + 28] ; ebp <- residual[]
xor esi, esi ; esi <- residual_sample = 0
xor ebx, ebx ; ebx <- abs_residual_partition_sum = 0;
; note we put the updates to 'end' and 'abs_residual_partition_sum' at the end of loop0 and in the initialization above so we could align loop0 and loop1
ALIGN 16
.loop0: ; for(partition = residual_sample = 0; partition < partitions; partition++) {
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++)
mov eax, [ebp + esi * 4]
cdq
@ -106,9 +105,11 @@ cident precompute_partition_info_sums_32bit_asm_ia32_
cmp esi, edi ; /* since the loop will always run at least once, we can put the loop check down here */
jb .loop1
.next1:
add edi, [esp + 4] ; end += default_partition_samples;
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
xor ebx, ebx ; abs_residual_partition_sum = 0;
add ecx, byte 1
cmp ecx, [esp] ; /* since the loop will always run at least once, we can put the loop check down here */
jb .loop0
@ -127,7 +128,7 @@ cident precompute_partition_info_sums_32bit_asm_ia32_
jl .next2
mov edx, 1
shl edx, cl ; const unsigned partitions = 1u << partition_order;
ALIGN 16;@@@ OPT: remove?
ALIGN 16
.loop3: ; for(i = 0; i < partitions; i++) {
mov eax, [esi]
mov [edi + 4], dword 0