about summary refs log tree commit diff
path: root/sysdeps/powerpc/powerpc32/fpu/s_floorf.S
blob: b87e3bf33ee6d38ecb3d1bdc5b919da1d0883c23 (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
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
/* float Floor function.  PowerPC32 version.
   Copyright (C) 2004-2017 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, see
   <http://www.gnu.org/licenses/>.  */

#include <sysdep.h>

	.section	.rodata.cst4,"aM",@progbits,4
	.align	2
.LC0:	/* 2**23 */
	.long 0x4b000000

	.section	".text"
ENTRY (__floorf)
#ifdef SHARED
	mflr	r11
	cfi_register(lr,r11)
	SETUP_GOT_ACCESS(r9,got_label)
	addis	r9,r9,.LC0-got_label@ha
	lfs	fp13,.LC0-got_label@l(r9)
	mtlr	r11
	cfi_same_value (lr)
#else
	lis	r9,.LC0@ha
	lfs	fp13,.LC0@l(r9)
#endif
	fabs	fp0,fp1
	fsubs	fp12,fp13,fp13	/* generate 0.0  */
	fcmpu	cr7,fp0,fp13	/* if (fabs(x) > TWO23)  */
	mffs	fp11		/* Save current FPU rounding mode and
				   "inexact" state.  */
	fcmpu	cr6,fp1,fp12	/* if (x > 0.0)  */
	bnl-	cr7,.L10
	mtfsfi	7,3		/* Set rounding mode toward -inf.  */
	ble-	cr6,.L4
	fadds	fp1,fp1,fp13	/* x+= TWO23;  */
	fsubs	fp1,fp1,fp13	/* x-= TWO23;  */
	fabs	fp1,fp1		/* if (x == 0.0)  */
				/* x = 0.0; */
	mtfsf	0xff,fp11	/* Restore previous rounding mode and
				   "inexact" state.  */
	blr
.L4:
	bge-	cr6,.L9		/* if (x < 0.0)  */
	fsubs	fp1,fp1,fp13	/* x-= TWO23;  */
	fadds	fp1,fp1,fp13	/* x+= TWO23;  */
	fnabs	fp1,fp1		/* if (x == 0.0)  */
				/* x = -0.0; */
.L9:
	mtfsf	0xff,fp11	/* Restore previous rounding mode and
				   "inexact" state.  */
	blr
.L10:
	/* Ensure sNaN input is converted to qNaN.  */
	fcmpu	cr7,fp1,fp1
	beqlr	cr7
	fadds	fp1,fp1,fp1
	blr
	END (__floorf)

weak_alias (__floorf, floorf)