diff options
Diffstat (limited to 'sysdeps/libm-i387/s_floor.S')
| -rw-r--r-- | sysdeps/libm-i387/s_floor.S | 29 |
1 files changed, 29 insertions, 0 deletions
diff --git a/sysdeps/libm-i387/s_floor.S b/sysdeps/libm-i387/s_floor.S new file mode 100644 index 0000000000..33d5dbcc70 --- /dev/null +++ b/sysdeps/libm-i387/s_floor.S @@ -0,0 +1,29 @@ +/* + * Written by J.T. Conklin <jtc@netbsd.org>. + * Public domain. + */ + +#include <machine/asm.h> + +RCSID("$NetBSD: s_floor.S,v 1.4 1995/05/09 00:01:59 jtc Exp $") + +ENTRY(__floor) + pushl %ebp + movl %esp,%ebp + subl $8,%esp + + fstcw -12(%ebp) /* store fpu control word */ + movw -12(%ebp),%dx + orw $0x0400,%dx /* round towards -oo */ + andw $0xf7ff,%dx + movw %dx,-16(%ebp) + fldcw -16(%ebp) /* load modfied control word */ + + fldl 8(%ebp); /* round */ + frndint + + fldcw -12(%ebp) /* restore original control word */ + + leave + ret +weak_alias (__floor, floor) |