1276789Sdim// This file is dual licensed under the MIT and the University of Illinois Open 2276789Sdim// Source Licenses. See LICENSE.TXT for details. 3276789Sdim 4276789Sdim#include "../assembly.h" 5276789Sdim 6276789Sdim// long double __floatundixf(du_int a);16 7276789Sdim 8276789Sdim#ifdef __i386__ 9276789Sdim 10276789SdimCONST_SECTION 11276789Sdim 12276789Sdim .balign 16 13276789Sdimtwop52: 14276789Sdim .quad 0x4330000000000000 15276789Sdim 16276789Sdim .balign 16 17276789Sdimtwop84_plus_twop52_neg: 18276789Sdim .quad 0xc530000000100000 19276789Sdim 20276789Sdim .balign 16 21276789Sdimtwop84: 22276789Sdim .quad 0x4530000000000000 23276789Sdim 24276789Sdim#define REL_ADDR(_a) (_a)-0b(%eax) 25276789Sdim 26276789Sdim.text 27276789Sdim.balign 4 28276789SdimDEFINE_COMPILERRT_FUNCTION(__floatundixf) 29276789Sdim calll 0f 30276789Sdim0: popl %eax 31276789Sdim movss 8(%esp), %xmm0 // hi 32 bits of input 32276789Sdim movss 4(%esp), %xmm1 // lo 32 bits of input 33276789Sdim orpd REL_ADDR(twop84), %xmm0 // 2^84 + hi (as a double) 34276789Sdim orpd REL_ADDR(twop52), %xmm1 // 2^52 + lo (as a double) 35276789Sdim addsd REL_ADDR(twop84_plus_twop52_neg), %xmm0 // hi - 2^52 (no rounding occurs) 36276789Sdim movsd %xmm1, 4(%esp) 37276789Sdim fldl 4(%esp) 38276789Sdim movsd %xmm0, 4(%esp) 39276789Sdim faddl 4(%esp) 40276789Sdim ret 41276789SdimEND_COMPILERRT_FUNCTION(__floatundixf) 42276789Sdim 43276789Sdim#endif // __i386__ 44