[rustc.git] / src / compiler-rt / lib / builtins / arm / nesf2vfp.S

//===-- nesf2vfp.S - Implement nesf2vfp -----------------------------------===//
//
//                     The LLVM Compiler Infrastructure
//
// This file is dual licensed under the MIT and the University of Illinois Open
// Source Licenses. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//

#include "../assembly.h"

//
// extern int __nesf2vfp(float a, float b);
//
// Returns one iff a != b and neither is NaN.
// Uses Darwin calling convention where single precision arguments are passsed 
// like 32-bit ints
//
	.syntax unified
	.p2align 2
DEFINE_COMPILERRT_FUNCTION(__nesf2vfp)
	vmov	s14, r0	    // move from GPR 0 to float register
	vmov	s15, r1	    // move from GPR 1 to float register
	vcmp.f32 s14, s15
	vmrs	apsr_nzcv, fpscr
	movne	r0, #1      // set result register to 1 if unequal
	moveq	r0, #0
	bx	lr
END_COMPILERRT_FUNCTION(__nesf2vfp)
Commit	Line	Data
1a4d82fc JJ	1	//===-- nesf2vfp.S - Implement nesf2vfp -----------------------------------===//
	2	//
	3	// The LLVM Compiler Infrastructure
	4	//
	5	// This file is dual licensed under the MIT and the University of Illinois Open
	6	// Source Licenses. See LICENSE.TXT for details.
	7	//
	8	//===----------------------------------------------------------------------===//
	9
	10	#include "../assembly.h"
	11
	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	//
	19	.syntax unified
92a42be0	20	.p2align 2
1a4d82fc JJ	21	DEFINE_COMPILERRT_FUNCTION(__nesf2vfp)
	22	vmov s14, r0 // move from GPR 0 to float register
	23	vmov s15, r1 // move from GPR 1 to float register
	24	vcmp.f32 s14, s15
	25	vmrs apsr_nzcv, fpscr
	26	movne r0, #1 // set result register to 1 if unequal
	27	moveq r0, #0
	28	bx lr
	29	END_COMPILERRT_FUNCTION(__nesf2vfp)