| /* |
| * Written by J.T. Conklin <jtc@netbsd.org>. |
| * Public domain. |
| */ |
| |
| #include <machine/asm.h> |
| #include <libm-alias-double.h> |
| |
| RCSID("$NetBSD: s_floor.S,v 1.4 1995/05/09 00:01:59 jtc Exp $") |
| |
| ENTRY(__floor) |
| 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 $0x400,%edx /* round towards -oo */ |
| orl 4(%esp),%edx |
| andl $0xf7ff,%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 (__floor) |
| libm_alias_double (__floor, floor) |
