2 * Copyright (C) 2014 Andrew Turner
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
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.
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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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
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21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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28 #include <machine/asm.h>
29 __FBSDID("$FreeBSD$");
31 #define PCR_Z (1 << 30)
32 #define PCR_C (1 << 29)
35 * These functions return the result in the CPSR register.
37 * For __aeabi_cdcmple:
43 * __aeabi_cdrcmple is the same as __aeabi_cdcmple, however the arguments
46 ENTRY(__aeabi_cdcmple)
47 push {r4, r5, r6, r7, ip, lr}
49 /* Backup the input registers */
54 /* Is it less than? */
58 /* Yes, clear Z and C */
63 /* Restore the input regsters for the next function call */
72 /* Yes, set Z and C */
73 msr cpsr_c, #(PCR_Z | PCR_C)
77 /* Not less than or equal, set C and clear Z */
81 pop {r4, r5, r6, r7, ip, pc}
84 ENTRY(__aeabi_cdrcmple)
85 /* Swap the first half of the arguments */
90 /* And the second half */
99 * This is just like __aeabi_cdcmple except it will not throw an exception
100 * in the presence of a quiet NaN. If either argument is a signalling NaN we
103 ENTRY(__aeabi_cdcmpeq)
104 /* Check if we can call __aeabi_cfcmple safely */
105 push {r0, r1, r2, r3, r4, lr}
106 bl __aeabi_cdcmpeq_helper
108 pop {r0, r1, r2, r3, r4, lr}