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Nick Kledzik91300112009-09-12 01:23:48 +00001//===-- nesf2vfp.S - Implement nesf2vfp -----------------------------------===//
2//
3// The LLVM Compiler Infrastructure
4//
Howard Hinnant5b791f62010-11-16 22:13:33 +00005// This file is dual licensed under the MIT and the University of Illinois Open
6// Source Licenses. See LICENSE.TXT for details.
Nick Kledzik91300112009-09-12 01:23:48 +00007//
8//===----------------------------------------------------------------------===//
9
Daniel Dunbar7d504782009-10-27 17:49:50 +000010#include "../assembly.h"
Nick Kledzik91300112009-09-12 01:23:48 +000011
12//
13// extern int __nesf2vfp(float a, float b);
14//
15// Returns one iff a != b and neither is NaN.
16// Uses Darwin calling convention where single precision arguments are passsed
17// like 32-bit ints
18//
Nick Kledzik8e7ebea2010-04-21 22:36:23 +000019 .align 2
Daniel Dunbar9ff93712009-10-27 17:50:21 +000020DEFINE_COMPILERRT_FUNCTION(__nesf2vfp)
Nick Kledzik91300112009-09-12 01:23:48 +000021 fmsr s14, r0 // move from GPR 0 to float register
22 fmsr s15, r1 // move from GPR 1 to float register
23 fcmps s14, s15
24 fmstat
25 movne r0, #1 // set result register to 1 if unequal
26 moveq r0, #0
27 bx lr
28