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| author | peter <peter@FreeBSD.org> | 2003-05-08 03:19:37 +0000 |
|---|---|---|
| committer | peter <peter@FreeBSD.org> | 2003-05-08 03:19:37 +0000 |
| commit | 223b5925cfbbd74c7919b70438cc20deecdc6514 (patch) | |
| tree | 56ecae4d1a4cabccb358a3b9369ca7efde616867 | |
| parent | c47ebbd98f7167ae78a7885c1afa61c6439b5f90 (diff) | |
| download | FreeBSD-src-223b5925cfbbd74c7919b70438cc20deecdc6514.zip FreeBSD-src-223b5925cfbbd74c7919b70438cc20deecdc6514.tar.gz | |
Tidy up modf.S and make it actually work. It wasn't extracting
the value out of ST(0) before copying it to %xmm0. Also remove bogus stack
frame and work in the red zone.
| -rw-r--r-- | lib/libc/amd64/gen/modf.S | 29 |
1 files changed, 13 insertions, 16 deletions
diff --git a/lib/libc/amd64/gen/modf.S b/lib/libc/amd64/gen/modf.S index 2c25b77..d448de1 100644 --- a/lib/libc/amd64/gen/modf.S +++ b/lib/libc/amd64/gen/modf.S @@ -52,44 +52,41 @@ __FBSDID("$FreeBSD$"); /* With CHOP mode on, frndint behaves as TRUNC does. Useful. */ ENTRY(modf) - pushq %rbp - movq %rsp,%rbp - subq $24,%rsp /* * Set chop mode. */ - fnstcw -12(%rbp) - movw -12(%rbp),%dx + fnstcw -12(%rsp) + movw -12(%rsp),%dx orw $3072,%dx - movw %dx,-16(%rbp) - fldcw -16(%rbp) + movw %dx,-16(%rsp) + fldcw -16(%rsp) /* * Get integral part. */ - movsd %xmm0,-24(%rbp) - fldl -24(%rbp) + movsd %xmm0,-24(%rsp) + fldl -24(%rsp) frndint - fstpl -8(%rbp) + fstpl -8(%rsp) /* * Restore control word. */ - fldcw -12(%rbp) + fldcw -12(%rsp) /* * Store integral part. */ - movsd -8(%rbp),%xmm0 + movsd -8(%rsp),%xmm0 movsd %xmm0,(%rdi) /* * Get fractional part and return it. */ - fldl -24(%rbp) - fsubl -8(%rbp) - movsd -8(%rbp),%xmm0 + fldl -24(%rsp) + fsubl -8(%rsp) + fstpl -8(%rsp) + movsd -8(%rsp),%xmm0 - leave ret |
