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 CONST_SECTION 11 12 .balign 16 13 twop52: 14 .quad 0x4330000000000000 15 16 .balign 16 17 twop84_plus_twop52_neg: 18 .quad 0xc530000000100000 19 20 .balign 16 21 twop84: 22 .quad 0x4530000000000000 23 24 #define REL_ADDR(_a) (_a)-0b(%eax) 25 26 .text 27 .balign 4 28 DEFINE_COMPILERRT_FUNCTION(__floatundixf) 29 calll 0f 30 0: popl %eax 31 movss 8(%esp), %xmm0 // hi 32 bits of input 32 movss 4(%esp), %xmm1 // lo 32 bits of input 33 orpd REL_ADDR(twop84), %xmm0 // 2^84 + hi (as a double) 34 orpd REL_ADDR(twop52), %xmm1 // 2^52 + lo (as a double) 35 addsd REL_ADDR(twop84_plus_twop52_neg), %xmm0 // hi - 2^52 (no rounding occurs) 36 movsd %xmm1, 4(%esp) 37 fldl 4(%esp) 38 movsd %xmm0, 4(%esp) 39 faddl 4(%esp) 40 ret 41 END_COMPILERRT_FUNCTION(__floatundixf) 42 43 #endif // __i386__ 44 45 NO_EXEC_STACK_DIRECTIVE 46 47
