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tighten loops using "Jcc NEAR"

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This commit is contained in:
Josh Coalson 2001-05-21 22:12:55 +00:00
parent 2cfb9ee952
commit d1299d9626
2 changed files with 9 additions and 12 deletions
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17
src/libFLAC/i386/fixed_asm.nasm
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@ -171,9 +171,7 @@ FLAC__fixed_compute_best_predictor_asm:
movd mm5, eax ; mm5 = 0:abs(error_4)
paddd mm2, mm5 ; total_error_4 += abs(error_4)
dec ecx
jecxz .loop_end ; can't "jnz .loop" because of distance
jmp .loop
.loop_end:
jnz near .loop
; if(total_error_0 < min(min(min(total_error_1, total_error_2), total_error_3), total_error_4))
; order = 0;
@ -234,12 +232,7 @@ FLAC__fixed_compute_best_predictor_asm:
fldz ; ST = 0.0 data_len
xor eax, eax
cmp eax, [esp + 32]
jne .rbps_0
; data_len == 0, so residual_bits_per_sample[*] = 0.0
mov ecx, 5 ; eax still == 0, ecx = # of dwords of 0 to store
mov edi, [esp + 36]
rep stosd
jmp .end
je near .data_len_is_0
.rbps_0:
cmp eax, ebx
je .total_error_0_is_0
@ -320,6 +313,12 @@ FLAC__fixed_compute_best_predictor_asm:
.rbps_end:
fstp st0 ; ST = data_len
fstp st0 ; ST = [empty]
jmp short .end
.data_len_is_0:
; data_len == 0, so residual_bits_per_sample[*] = 0.0
mov ecx, 5 ; eax still == 0, ecx = # of dwords of 0 to store
mov edi, [esp + 36]
rep stosd
.end:
mov eax, ebp ; return order

4
src/libFLAC/i386/lpc_asm.nasm
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@ -157,9 +157,7 @@ FLAC__lpc_compute_autocorrelation_asm:
inc ebp ; sample++
add eax, byte 4 ; &data[sample++]
dec ecx
jecxz .outer_loop_end ; can't "jnz .outer_loop" because of distance
jmp .outer_loop
.outer_loop_end:
jnz near .outer_loop
; for(; sample < data_len; sample++) {
; d = data[sample];