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author | ed <ed@FreeBSD.org> | 2010-11-11 15:13:11 +0000 |
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committer | ed <ed@FreeBSD.org> | 2010-11-11 15:13:11 +0000 |
commit | 870837e3e92f721a44db51308f2b900d928fb04f (patch) | |
tree | 9f851f7f6da4a4d9010d26bf17881d3bc5320f2b /contrib/compiler-rt/lib/i386/floatundidf.S | |
parent | a1b6fa69a6f674978270e402b8bba6552e152066 (diff) | |
parent | 653bb6745595746d04ad4acacaaab66caaaeb69b (diff) | |
download | FreeBSD-src-870837e3e92f721a44db51308f2b900d928fb04f.zip FreeBSD-src-870837e3e92f721a44db51308f2b900d928fb04f.tar.gz |
Import libcompiler_rt into HEAD and add Makefiles.
Obtained from: user/ed/compiler-rt
Diffstat (limited to 'contrib/compiler-rt/lib/i386/floatundidf.S')
-rw-r--r-- | contrib/compiler-rt/lib/i386/floatundidf.S | 46 |
1 files changed, 46 insertions, 0 deletions
diff --git a/contrib/compiler-rt/lib/i386/floatundidf.S b/contrib/compiler-rt/lib/i386/floatundidf.S new file mode 100644 index 0000000..7186a35 --- /dev/null +++ b/contrib/compiler-rt/lib/i386/floatundidf.S @@ -0,0 +1,46 @@ +//===-- floatundidf.S - Implement __floatundidf for i386 ------------------===// +// +// The LLVM Compiler Infrastructure +// +// This file is distributed under the University of Illinois Open Source +// License. See LICENSE.TXT for details. +// +//===----------------------------------------------------------------------===// +// +// This file implements __floatundidf for the compiler_rt library. +// +//===----------------------------------------------------------------------===// + +#include "../assembly.h" + +// double __floatundidf(du_int a); + +#ifdef __i386__ + +#ifndef __ELF__ +.const +#endif +.align 4 +twop52: .quad 0x4330000000000000 +twop84_plus_twop52: + .quad 0x4530000000100000 +twop84: .quad 0x4530000000000000 + +#define REL_ADDR(_a) (_a)-0b(%eax) + +.text +.align 4 +DEFINE_COMPILERRT_FUNCTION(__floatundidf) + movss 8(%esp), %xmm1 // high 32 bits of a + movss 4(%esp), %xmm0 // low 32 bits of a + calll 0f +0: popl %eax + orpd REL_ADDR(twop84), %xmm1 // 0x1p84 + a_hi (no rounding occurs) + subsd REL_ADDR(twop84_plus_twop52), %xmm1 // a_hi - 0x1p52 (no rounding occurs) + orpd REL_ADDR(twop52), %xmm0 // 0x1p52 + a_lo (no rounding occurs) + addsd %xmm1, %xmm0 // a_hi + a_lo (round happens here) + movsd %xmm0, 4(%esp) + fldl 4(%esp) + ret + +#endif // __i386__ |