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// 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__
NO_EXEC_STACK_DIRECTIVE
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