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Keep old alloca() code around.

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This commit is contained in:
Markus F.X.J. Oberhumer
2006-08-18 12:26:41 +02:00
parent 42bac47a71
commit 8ab309630b
1 changed files with 12 additions and 0 deletions
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src/stub/src/arch/i386/lzma_d.S
+12
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@@ -98,6 +98,8 @@ section LZMA_ELF00
mov ebx, -LZMA_LIT_SIZE mov ebx, -LZMA_LIT_SIZE
shl ebx,cl shl ebx,cl
#if 1
// alloca() via lea
// CLzmaDecoderState:{*_bits, CProb[LZMA_BASE_SIZE + (LZMA_LIT_SIZE<<%cl)]} // CLzmaDecoderState:{*_bits, CProb[LZMA_BASE_SIZE + (LZMA_LIT_SIZE<<%cl)]}
lea esp,[0 -4 - 2*LZMA_BASE_SIZE + 2*ebx + esp] lea esp,[0 -4 - 2*LZMA_BASE_SIZE + 2*ebx + esp]
and esp, (~0<<5) // 32-byte align and esp, (~0<<5) // 32-byte align
@@ -105,6 +107,16 @@ section LZMA_ELF00
push 0 // inSizeProcessed push 0 // inSizeProcessed
push 0 // outSizeProcessed push 0 // outSizeProcessed
mov ebx,esp mov ebx,esp
#else
// alloca() via push 0
// inSizeProcessed, outSizeProcessed, *_bits, CLzmaDecoderState
lea ebx,[0 -(2*4 +4) - 2*LZMA_BASE_SIZE + 2*ebx + esp]
and ebx, (~0<<5) // 32-byte align
.elf_clearstack1:
push 0
cmp esp,ebx
jne .elf_clearstack1
#endif
push ebx // &outSizeProcessed push ebx // &outSizeProcessed
add ebx, 4 add ebx, 4