1 // This file is dual licensed under the MIT and the University of Illinois Open 2 // Source Licenses. See LICENSE.TXT for details. 3 4 #include "../assembly.h" 5 6 // long double __floatundixf(du_int a);16 7 8 #ifdef __i386__ 9 10 #ifndef __ELF__ 11 .const 12 #endif 13 .balign 4 14 twop52: .quad 0x4330000000000000 15 twop84_plus_twop52_neg: 16 .quad 0xc530000000100000 17 twop84: .quad 0x4530000000000000 18 19 #define REL_ADDR(_a) (_a)-0b(%eax) 20 21 .text 22 .balign 4 23 DEFINE_COMPILERRT_FUNCTION(__floatundixf) 24 calll 0f 25 0: popl %eax 26 movss 8(%esp), %xmm0 // hi 32 bits of input 27 movss 4(%esp), %xmm1 // lo 32 bits of input 28 orpd REL_ADDR(twop84), %xmm0 // 2^84 + hi (as a double) 29 orpd REL_ADDR(twop52), %xmm1 // 2^52 + lo (as a double) 30 addsd REL_ADDR(twop84_plus_twop52_neg), %xmm0 // hi - 2^52 (no rounding occurs) 31 movsd %xmm1, 4(%esp) 32 fldl 4(%esp) 33 movsd %xmm0, 4(%esp) 34 faddl 4(%esp) 35 ret 36 END_COMPILERRT_FUNCTION(__floatundixf) 37 38 #endif // __i386__ 39
