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kolibrios-fun/drivers/old/radeonhd/s_ceilf.asm
Sergey Semyonov (Serge) 7c0a5de1e7 move old ddx driver
git-svn-id: svn://kolibrios.org@1407 a494cfbc-eb01-0410-851d-a64ba20cac60
2010-02-12 17:43:39 +00:00

32 lines
641 B
NASM

/*
* Written by J.T. Conklin <jtc@netbsd.org>.
* Public domain.
*/
.text
.global _ceilf
_ceilf:
flds 4(%esp)
subl $8,%esp
fstcw 4(%esp) /* store fpu control word */
/* We use here %edx although only the low 1 bits are defined.
But none of the operations should care and they are faster
than the 16 bit operations. */
movl $0x0800,%edx /* round towards +oo */
orl 4(%esp),%edx
andl $0xfbff,%edx
movl %edx,(%esp)
fldcw (%esp) /* load modified control word */
frndint /* round */
fldcw 4(%esp) /* restore original control word */
addl $8,%esp
ret