minix/sys/external/bsd/compiler_rt/dist/lib/i386/floatundidf.S
Lionel Sambuc 4684ddb6aa LLVM Minix changes
- import libcxx
 - reduce targets to the one when compiled as a tools

Change-Id: Iabb8427f80ff8e89463559a28bcb8b4f2bdbc496
2014-07-28 17:05:59 +02:00

46 lines
1.3 KiB
ArmAsm

//===-- floatundidf.S - Implement __floatundidf for i386 ------------------===//
//
// The LLVM Compiler Infrastructure
//
// This file is dual licensed under the MIT and the University of Illinois Open
// Source Licenses. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// This file implements __floatundidf for the compiler_rt library.
//
//===----------------------------------------------------------------------===//
#include "../assembly.h"
// double __floatundidf(du_int a);
#ifdef __i386__
#ifndef __ELF__
.const
#endif
.align 4
twop52: .quad 0x4330000000000000
twop84_plus_twop52:
.quad 0x4530000000100000
twop84: .quad 0x4530000000000000
#define REL_ADDR(_a) (_a)-0b(%eax)
.text
.align 4
DEFINE_COMPILERRT_FUNCTION(__floatundidf)
movss 8(%esp), %xmm1 // high 32 bits of a
movss 4(%esp), %xmm0 // low 32 bits of a
calll 0f
0: popl %eax
orpd REL_ADDR(twop84), %xmm1 // 0x1p84 + a_hi (no rounding occurs)
subsd REL_ADDR(twop84_plus_twop52), %xmm1 // a_hi - 0x1p52 (no rounding occurs)
orpd REL_ADDR(twop52), %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
#endif // __i386__