1/*
2 * Copyright (C) 2014 Andrew Turner
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 *
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
24 * SUCH DAMAGE.
25 *
26 */
27
28#include <machine/asm.h>
| 1/*
2 * Copyright (C) 2014 Andrew Turner
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 *
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
24 * SUCH DAMAGE.
25 *
26 */
27
28#include <machine/asm.h>
|
30
31#define PCR_Z (1 << 30)
32#define PCR_C (1 << 29)
33
34/*
35 * These functions return the result in the CPSR register.
36 *
37 * For __aeabi_cfcmple:
38 * Z C
39 * LT 0 0
40 * EQ 1 1
41 * else 0 1
42 *
43 * __aeabi_cfrcmple is the same as __aeabi_cfcmple, however the arguments
44 * have been swapped.
45 */
46ENTRY(__aeabi_cfcmple)
47 push {r4, r5, ip, lr}
48
49 /* Backup the input registers */
50 mov r4, r0
51 mov r5, r1
52 /* Is it less than? */
53 bl __aeabi_fcmplt
54 cmp r0, #1
55 bne 1f
56 /* Yes, clear Z and C */
57 msr cpsr_c, #(0)
58 b 99f
59
601:
61 /* Restore the input regsters for the next function call */
62 mov r0, r4
63 mov r1, r5
64 /* Is it equal? */
65 bl __aeabi_fcmpeq
66 cmp r0, #1
67 bne 2f
68 /* Yes, set Z and C */
69 msr cpsr_c, #(PCR_Z | PCR_C)
70 b 99f
71
722:
73 /* Not less than or equal, set C and clear Z */
74 msr cpsr_c, #(PCR_C)
75
7699:
77 pop {r4, r5, ip, pc}
78END(__aeabi_cfcmple)
79
80ENTRY(__aeabi_cfrcmple)
81 /* Swap the arguments */
82 mov ip, r0
83 mov r0, r1
84 mov r1, ip
85
86 b __aeabi_cfcmple
87END(__aeabi_cfrcmple)
88
89/*
90 * This is just like __aeabi_cfcmple except it will not throw an exception
91 * in the presence of a quiet NaN. If either argument is a signalling NaN we
92 * will still signal.
93 */
94ENTRY(__aeabi_cfcmpeq)
95 /* Check if we can call __aeabi_cfcmple safely */
96 push {r0, r1, r2, lr}
97 bl __aeabi_cfcmpeq_helper
98 cmp r0, #1
99 pop {r0, r1, r2, lr}
100 beq 1f
101
102 bl __aeabi_cfcmple
103 RET
104
1051:
106 msreq cpsr_c, #(PCR_C)
107 RET
108END(__aeabi_cfcmpeq)
| 30
31#define PCR_Z (1 << 30)
32#define PCR_C (1 << 29)
33
34/*
35 * These functions return the result in the CPSR register.
36 *
37 * For __aeabi_cfcmple:
38 * Z C
39 * LT 0 0
40 * EQ 1 1
41 * else 0 1
42 *
43 * __aeabi_cfrcmple is the same as __aeabi_cfcmple, however the arguments
44 * have been swapped.
45 */
46ENTRY(__aeabi_cfcmple)
47 push {r4, r5, ip, lr}
48
49 /* Backup the input registers */
50 mov r4, r0
51 mov r5, r1
52 /* Is it less than? */
53 bl __aeabi_fcmplt
54 cmp r0, #1
55 bne 1f
56 /* Yes, clear Z and C */
57 msr cpsr_c, #(0)
58 b 99f
59
601:
61 /* Restore the input regsters for the next function call */
62 mov r0, r4
63 mov r1, r5
64 /* Is it equal? */
65 bl __aeabi_fcmpeq
66 cmp r0, #1
67 bne 2f
68 /* Yes, set Z and C */
69 msr cpsr_c, #(PCR_Z | PCR_C)
70 b 99f
71
722:
73 /* Not less than or equal, set C and clear Z */
74 msr cpsr_c, #(PCR_C)
75
7699:
77 pop {r4, r5, ip, pc}
78END(__aeabi_cfcmple)
79
80ENTRY(__aeabi_cfrcmple)
81 /* Swap the arguments */
82 mov ip, r0
83 mov r0, r1
84 mov r1, ip
85
86 b __aeabi_cfcmple
87END(__aeabi_cfrcmple)
88
89/*
90 * This is just like __aeabi_cfcmple except it will not throw an exception
91 * in the presence of a quiet NaN. If either argument is a signalling NaN we
92 * will still signal.
93 */
94ENTRY(__aeabi_cfcmpeq)
95 /* Check if we can call __aeabi_cfcmple safely */
96 push {r0, r1, r2, lr}
97 bl __aeabi_cfcmpeq_helper
98 cmp r0, #1
99 pop {r0, r1, r2, lr}
100 beq 1f
101
102 bl __aeabi_cfcmple
103 RET
104
1051:
106 msreq cpsr_c, #(PCR_C)
107 RET
108END(__aeabi_cfcmpeq)
|