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

//===-- floatsidfvfp.S - Implement floatsidfvfp ---------------------------===//
//
//                     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 double __floatsidfvfp(int a);
//
// Converts a 32-bit int to a double precision float.
// Uses Darwin calling convention where a double precision result is 
// return in GPR register pair.
//
	.syntax unified
	.p2align 2
DEFINE_COMPILERRT_FUNCTION(__floatsidfvfp)
	vmov	s15, r0        // move int to float register s15
	vcvt.f64.s32 d7, s15   // convert 32-bit int in s15 to double in d7
	vmov	r0, r1, d7     // move d7 to result register pair r0/r1
	bx	lr
END_COMPILERRT_FUNCTION(__floatsidfvfp)
Commit	Line	Data
1a4d82fc JJ	1	//===-- floatsidfvfp.S - Implement floatsidfvfp ---------------------------===//
	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 double __floatsidfvfp(int a);
	14	//
	15	// Converts a 32-bit int to a double precision float.
	16	// Uses Darwin calling convention where a double precision result is
	17	// return in GPR register pair.
	18	//
	19	.syntax unified
92a42be0	20	.p2align 2
1a4d82fc JJ	21	DEFINE_COMPILERRT_FUNCTION(__floatsidfvfp)
	22	vmov s15, r0 // move int to float register s15
	23	vcvt.f64.s32 d7, s15 // convert 32-bit int in s15 to double in d7
	24	vmov r0, r1, d7 // move d7 to result register pair r0/r1
	25	bx lr
	26	END_COMPILERRT_FUNCTION(__floatsidfvfp)