blob: 21d6154a7665f4fbc3ffa2da901928a1d779779d (
plain) (
blame)
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
|
// This file is dual licensed under the MIT and the University of Illinois Open
// Source Licenses. See LICENSE.TXT for details.
#include "../assembly.h"
// double __floatundidf(du_int a);
#ifdef __i386__
CONST_SECTION
.balign 16
twop52:
.quad 0x4330000000000000
.balign 16
twop32:
.quad 0x41f0000000000000
#define REL_ADDR(_a) (_a)-0b(%eax)
.text
.balign 4
DEFINE_COMPILERRT_FUNCTION(__floatdidf)
cvtsi2sd 8(%esp), %xmm1
movss 4(%esp), %xmm0 // low 32 bits of a
calll 0f
0: popl %eax
mulsd REL_ADDR(twop32), %xmm1 // a_hi as a double (without rounding)
movsd REL_ADDR(twop52), %xmm2 // 0x1.0p52
subsd %xmm2, %xmm1 // a_hi - 0x1p52 (no rounding occurs)
orpd %xmm2, %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
END_COMPILERRT_FUNCTION(__floatdidf)
#endif // __i386__
|
