72c50e51a5
It seems there have only been a small amount to the compiler-rt source code in the mean time. I'd rather have the code in sync as much as possible by the time we release 9.0. Changes: - The libcompiler_rt library is now dual licensed under both the University of Illinois "BSD-Like" license and the MIT license. - Our local modifications for using .hidden instead of .private_extern have been upstreamed, meaning our changes to lib/assembly.h can now be reverted. - A possible endless recursion in __modsi3() has been fixed. - Support for ARM EABI has been added, but it has no effect on FreeBSD (yet). - The functions __udivmodsi4 and __divmodsi4 have been added. Requested by: many, including bf@ and Pedro Giffuni
36 lines
874 B
ArmAsm
36 lines
874 B
ArmAsm
// 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__
|