| Current Path : /usr/src/contrib/compiler-rt/lib/i386/ |
FreeBSD hs32.drive.ne.jp 9.1-RELEASE FreeBSD 9.1-RELEASE #1: Wed Jan 14 12:18:08 JST 2015 root@hs32.drive.ne.jp:/sys/amd64/compile/hs32 amd64 |
| Current File : //usr/src/contrib/compiler-rt/lib/i386/floatdidf.S |
// This file is dual licensed under the MIT and the University of Illinois Open // Source Licenses. See LICENSE.TXT for details. #include "../assembly.h" // double __floatundidf(du_int a); #ifdef __i386__ #ifndef __ELF__ .const #endif .align 4 twop52: .quad 0x4330000000000000 twop32: .quad 0x41f0000000000000 #define REL_ADDR(_a) (_a)-0b(%eax) .text .align 4 DEFINE_COMPILERRT_FUNCTION(__floatdidf) cvtsi2sd 8(%esp), %xmm1 movss 4(%esp), %xmm0 // low 32 bits of a calll 0f 0: popl %eax mulsd REL_ADDR(twop32), %xmm1 // a_hi as a double (without rounding) movsd REL_ADDR(twop52), %xmm2 // 0x1.0p52 subsd %xmm2, %xmm1 // a_hi - 0x1p52 (no rounding occurs) orpd %xmm2, %xmm0 // 0x1p52 + a_lo (no rounding occurs) addsd %xmm1, %xmm0 // a_hi + a_lo (round happens here) movsd %xmm0, 4(%esp) fldl 4(%esp) ret #endif // __i386__