1 // This file is dual licensed under the MIT and the University of Illinois Open
2 // Source Licenses. See LICENSE.TXT for details.
4 #include "../assembly.h"
6 // long double __floatundixf(du_int a);16
14 twop52: .quad 0x4330000000000000
15 twop84_plus_twop52_neg:
16 .quad 0xc530000000100000
17 twop84: .quad 0x4530000000000000
19 #define REL_ADDR(_a) (_a)-0b(%eax)
23 DEFINE_COMPILERRT_FUNCTION(__floatundixf)
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)