summaryrefslogtreecommitdiff
path: root/lib/builtins/x86_64/floatundisf.S
blob: 252e30fa9ac86d929c9cb16116964e661da92800 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception

#include "../assembly.h"

// float __floatundisf(du_int a);

#ifdef __x86_64__

CONST_SECTION

	.balign 16
two:
	.single 2.0

#define REL_ADDR(_a)	(_a)(%rip)

.text
.balign 4
DEFINE_COMPILERRT_FUNCTION(__floatundisf)
	movq		$1,			%rsi
	testq		%rdi,		%rdi
	js			1f
	cvtsi2ssq	%rdi,		%xmm0
	ret
	
1:	andq		%rdi,		%rsi
	shrq		%rdi
	orq			%rsi,		%rdi
	cvtsi2ssq	%rdi,		%xmm0
	mulss	REL_ADDR(two),	%xmm0
	ret
END_COMPILERRT_FUNCTION(__floatundisf)

#endif // __x86_64__

NO_EXEC_STACK_DIRECTIVE