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auto merge of #5418 : luqmana/rust/stack-float, r=brson

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Like I commented in #2043, I can't reproduce the weirdness from #1388 on either mac or linux (x84_64) and pushing to try gives all green.

That's 128 less bytes to have to keep in the stack for every call to __morestack.
This commit is contained in:
bors 2013-04-18 13:45:55 -07:00
commit 2a86485277
1 changed files with 2 additions and 18 deletions
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20
src/rt/arch/x86_64/morestack.S
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@ -54,7 +54,7 @@ MORESTACK:
// Calculate the CFA as on offset from %ebp
.cfi_def_cfa_register %rbp
subq $184, %rsp
subq $56, %rsp
// Save argument registers of the original function
movq %rdi, (%rsp)
@ -63,14 +63,6 @@ MORESTACK:
movq %rcx, 24(%rsp)
movq %r8, 32(%rsp)
movq %r9, 40(%rsp)
movdqa %xmm0, 48(%rsp)
movdqa %xmm1, 64(%rsp)
movdqa %xmm2, 80(%rsp)
movdqa %xmm3, 96(%rsp)
movdqa %xmm4, 112(%rsp)
movdqa %xmm5, 128(%rsp)
movdqa %xmm6, 144(%rsp)
movdqa %xmm7, 160(%rsp)
// Calculate the address of the stack arguments.
// We have the base pointer, __morestack's return address,
@ -101,16 +93,8 @@ MORESTACK:
movq 24(%rsp), %rcx
movq 32(%rsp), %r8
movq 40(%rsp), %r9
movdqa 48(%rsp), %xmm0
movdqa 64(%rsp), %xmm1
movdqa 80(%rsp), %xmm2
movdqa 96(%rsp), %xmm3
movdqa 112(%rsp), %xmm4
movdqa 128(%rsp), %xmm5
movdqa 144(%rsp), %xmm6
movdqa 160(%rsp), %xmm7
addq $184, %rsp
addq $56, %rsp
movq 8(%rbp),%r10 // Grab the return pointer.
incq %r10 // Skip past the `ret` in our parent frame