diff options
Diffstat (limited to 'lib/i386/floatundixf.s')
-rw-r--r-- | lib/i386/floatundixf.s | 34 |
1 files changed, 34 insertions, 0 deletions
diff --git a/lib/i386/floatundixf.s b/lib/i386/floatundixf.s new file mode 100644 index 000000000..c24689aac --- /dev/null +++ b/lib/i386/floatundixf.s @@ -0,0 +1,34 @@ +// This file is distributed under the University of Illinois Open Source +// License. See LICENSE.TXT for details. + +// long double __floatundixf(du_int a);16 + +#ifdef __i386__ + +.const +.align 4 +twop52: .quad 0x4330000000000000 +twop84_plus_twop52_neg: + .quad 0xc530000000100000 +twop84: .quad 0x4530000000000000 + +#define REL_ADDR(_a) (_a)-0b(%eax) + +.text +.align 4 +.globl ___floatundixf +___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__
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