floatundisf.S revision 1.1.1.2 
1// This file is dual licensed under the MIT and the University of Illinois Open
2// Source Licenses. See LICENSE.TXT for details.
3
4#include "../assembly.h"
5
6// float __floatundisf(du_int a);
7
8#ifdef __x86_64__
9
10#ifndef __ELF__
11.literal4
12#endif
13two: .single 2.0
14
15#define REL_ADDR(_a)	(_a)(%rip)
16
17.text
18.balign 4
19DEFINE_COMPILERRT_FUNCTION(__floatundisf)
20	movq		$1,			%rsi
21	testq		%rdi,		%rdi
22	js			1f
23	cvtsi2ssq	%rdi,		%xmm0
24	ret
25
261:	andq		%rdi,		%rsi
27	shrq		%rdi
28	orq			%rsi,		%rdi
29	cvtsi2ssq	%rdi,		%xmm0
30	mulss	REL_ADDR(two),	%xmm0
31	ret
32END_COMPILERRT_FUNCTION(__floatundisf)
33
34#endif // __x86_64__
35