about summary refs log tree commit diff
path: root/sysdeps/powerpc/powerpc64/fpu/s_ceilf.S
blob: 34f61423cc89cc77a97968a3aba605a54eea2500 (plain) (blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
/* float ceil function.  PowerPC64 version.
   Copyright (C) 2004 Free Software Foundation, Inc.
   This file is part of the GNU C Library.

   The GNU C Library is free software; you can redistribute it and/or
   modify it under the terms of the GNU Lesser General Public
   License as published by the Free Software Foundation; either
   version 2.1 of the License, or (at your option) any later version.

   The GNU C Library is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
   Lesser General Public License for more details.

   You should have received a copy of the GNU Lesser General Public
   License along with the GNU C Library; if not, write to the Free
   Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
   02111-1307 USA.  */

#include <sysdep.h>

	.section	".toc","aw"
.LC0:	/* 2**23 */
	.tc FD_41600000_0[TC],0x4160000000000000
.LC1:	/* -0.0 */
	.tc FD_80000000_0[TC],0x8000000000000000
	.section	".text"

ENTRY (__ceilf)
	mffs	fp11		/* Save current FPU rounding mode.  */
	lfd	fp13,.LC0@toc(2)
	fabs	fp0,fp1
	fsubs	fp12,fp13,fp13	/* generate 0.0  */
	fcmpu	cr7,fp0,fp13	/* if (fabs(x) > TWO23)  */
	fcmpu	cr6,fp1,fp12	/* if (x > 0.0)  */
	bnllr-	cr7
	mtfsfi	7,2		/* Set rounding mode toward +inf.  */
	ble-	cr6,.L4
	fadds	fp1,fp1,fp13	/* x+= TWO23;  */
	fsubs	fp1,fp1,fp13	/* x-= TWO23;  */
.L9:	
	mtfsf	0x01,fp11	/* restore previous rounding mode.  */
	blr
.L4:
	bge-	cr6,.L9		/* if (x < 0.0)  */
	fsubs	fp1,fp1,fp13	/* x-= TWO23;  */
	fadds	fp1,fp1,fp13	/* x+= TWO23;  */
	fcmpu	cr5,fp1,fp12	/* if (x > 0.0)  */
	mtfsf	0x01,fp11	/* restore previous rounding mode.  */
	bnelr+	cr5
	lfd	fp1,.LC1@toc(2)	/* x must be -0.0 for the 0.0 case.  */	
	blr
	END (__ceilf)

weak_alias (__ceilf, ceilf)