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//===-- floatundidf.s - Implement __floatundidf for i386 ------------------===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// This file implements __floatundidf for the compiler_rt library.
//
//===----------------------------------------------------------------------===//
// double __floatundidf(du_int a);
#ifdef __i386__
.const
.align 4
twop52: .quad 0x4330000000000000
twop84_plus_twop52:
.quad 0x4530000000100000
twop84: .quad 0x4530000000000000
#define REL_ADDR(_a) (_a)-0b(%eax)
.text
.align 4
.globl ___floatundidf
___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__
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