diff options
Diffstat (limited to 'contrib/compiler-rt/lib/i386/floatundixf.S')
-rw-r--r-- | contrib/compiler-rt/lib/i386/floatundixf.S | 37 |
1 files changed, 37 insertions, 0 deletions
diff --git a/contrib/compiler-rt/lib/i386/floatundixf.S b/contrib/compiler-rt/lib/i386/floatundixf.S new file mode 100644 index 0000000..2cf6d5c --- /dev/null +++ b/contrib/compiler-rt/lib/i386/floatundixf.S @@ -0,0 +1,37 @@ +// This file is distributed under the University of Illinois Open Source +// License. See LICENSE.TXT for details. + +#include "../assembly.h" + +// long double __floatundixf(du_int a);16 + +#ifdef __i386__ + +#ifndef __ELF__ +.const +#endif +.align 4 +twop52: .quad 0x4330000000000000 +twop84_plus_twop52_neg: + .quad 0xc530000000100000 +twop84: .quad 0x4530000000000000 + +#define REL_ADDR(_a) (_a)-0b(%eax) + +.text +.align 4 +DEFINE_COMPILERRT_FUNCTION(__floatundixf) + calll 0f +0: popl %eax + movss 8(%esp), %xmm0 // hi 32 bits of input + movss 4(%esp), %xmm1 // lo 32 bits of input + orpd REL_ADDR(twop84), %xmm0 // 2^84 + hi (as a double) + orpd REL_ADDR(twop52), %xmm1 // 2^52 + lo (as a double) + addsd REL_ADDR(twop84_plus_twop52_neg), %xmm0 // hi - 2^52 (no rounding occurs) + movsd %xmm1, 4(%esp) + fldl 4(%esp) + movsd %xmm0, 4(%esp) + faddl 4(%esp) + ret + +#endif // __i386__ |