[rustc.git] / src / llvm / projects / compiler-rt / lib / i386 / floatundixf.S

// This file is dual licensed under the MIT and the University of Illinois Open
// Source Licenses. 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__
Commit	Line	Data
223e47cc LB	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	// long double __floatundixf(du_int a);16
	7
	8	#ifdef __i386__
	9
	10	#ifndef __ELF__
	11	.const
	12	#endif
	13	.align 4
	14	twop52: .quad 0x4330000000000000
	15	twop84_plus_twop52_neg:
	16	.quad 0xc530000000100000
	17	twop84: .quad 0x4530000000000000
	18
	19	#define REL_ADDR(_a) (_a)-0b(%eax)
	20
	21	.text
	22	.align 4
	23	DEFINE_COMPILERRT_FUNCTION(__floatundixf)
	24	calll 0f
	25	0: popl %eax
	26	movss 8(%esp), %xmm0 // hi 32 bits of input
	27	movss 4(%esp), %xmm1 // lo 32 bits of input
	28	orpd REL_ADDR(twop84), %xmm0 // 2^84 + hi (as a double)
	29	orpd REL_ADDR(twop52), %xmm1 // 2^52 + lo (as a double)
	30	addsd REL_ADDR(twop84_plus_twop52_neg), %xmm0 // hi - 2^52 (no rounding occurs)
	31	movsd %xmm1, 4(%esp)
	32	fldl 4(%esp)
	33	movsd %xmm0, 4(%esp)
	34	faddl 4(%esp)
	35	ret
	36
	37	#endif // __i386__