| 1 | /* |
|---|
| 2 | * Public domain. |
|---|
| 3 | */ |
|---|
| 4 | |
|---|
| 5 | #include <machine/asm.h> |
|---|
| 6 | #include <libm-alias-double.h> |
|---|
| 7 | |
|---|
| 8 | RCSID("$NetBSD: s_ceil.S,v 1.4 1995/05/08 23:52:13 jtc Exp $" ) |
|---|
| 9 | |
|---|
| 10 | ENTRY(__ceil) |
|---|
| 11 | fldl 4(%esp) |
|---|
| 12 | subl $32,%esp |
|---|
| 13 | cfi_adjust_cfa_offset (32) |
|---|
| 14 | |
|---|
| 15 | fnstenv 4(%esp) /* store fpu environment */ |
|---|
| 16 | |
|---|
| 17 | /* We use here %edx although only the low 1 bits are defined. |
|---|
| 18 | But none of the operations should care and they are faster |
|---|
| 19 | than the 16 bit operations. */ |
|---|
| 20 | movl $0x0800,%edx /* round towards +oo */ |
|---|
| 21 | orl 4(%esp),%edx |
|---|
| 22 | andl $0xfbff,%edx |
|---|
| 23 | movl %edx,(%esp) |
|---|
| 24 | fldcw (%esp) /* load modified control word */ |
|---|
| 25 | |
|---|
| 26 | frndint /* round */ |
|---|
| 27 | |
|---|
| 28 | fldenv 4(%esp) /* restore original environment */ |
|---|
| 29 | |
|---|
| 30 | addl $32,%esp |
|---|
| 31 | cfi_adjust_cfa_offset (-32) |
|---|
| 32 | ret |
|---|
| 33 | END (__ceil) |
|---|
| 34 | libm_alias_double (__ceil, ceil) |
|---|
| 35 | |
|---|
