35 lines
752 B
ArmAsm
35 lines
752 B
ArmAsm
|
/*
|
||
|
|
* Public domain.
|
||
|
|
*/
|
||
|
|
|
||
|
|
#include <machine/asm.h>
|
||
|
|
#include <libm-alias-double.h>
|
||
|
|
|
||
|
|
RCSID("$NetBSD: s_ceil.S,v 1.4 1995/05/08 23:52:13 jtc Exp $")
|
||
|
|
|
||
|
|
ENTRY(__ceil)
|
||
|
|
fldl 4(%esp)
|
||
|
|
subl $32,%esp
|
||
|
|
cfi_adjust_cfa_offset (32)
|
||
|
|
|
||
|
|
fnstenv 4(%esp) /* store fpu environment */
|
||
|
|
|
||
|
|
/* 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 */
|
||
|
|
|
||
|
|
fldenv 4(%esp) /* restore original environment */
|
||
|
|
|
||
|
|
addl $32,%esp
|
||
|
|
cfi_adjust_cfa_offset (-32)
|
||
|
|
ret
|
||
|
|
END (__ceil)
|
||
|
|
libm_alias_double (__ceil, ceil)
|