freebsd-dev/lib/msun/amd64/e_fmodf.S
Bruce Evans 83e449a402 Add asm versions of fmod(), fmodf() and fmodl() on amd64. Add asm
versions of fmodf() amd fmodl() on i387.

fmod is similar to remainder, and the C versions are 3 to 9 times
slower than the asm versions on x86 for both, but we had the strange
mixture of all 6 variants of remainder in asm and only 1 of 6
variants of fmod in asm.
2016-09-04 12:22:14 +00:00

25 lines
382 B
ArmAsm

/*
* Based on the i387 version written by J.T. Conklin <jtc@netbsd.org>.
* Public domain.
*/
#include <machine/asm.h>
__FBSDID("$FreeBSD$")
ENTRY(fmodf)
movss %xmm0,-4(%rsp)
movss %xmm1,-8(%rsp)
flds -8(%rsp)
flds -4(%rsp)
1: fprem
fstsw %ax
testw $0x400,%ax
jne 1b
fstps -4(%rsp)
movss -4(%rsp),%xmm0
fstp %st
ret
END(fmodf)
.section .note.GNU-stack,"",%progbits