File: ltsf2vfp.S

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//===-- ltsf2vfp.S - Implement ltsf2vfp -----------------------------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//

#include "../assembly.h"

//
// extern int __ltsf2vfp(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(__ltsf2vfp)
#if defined(COMPILER_RT_ARMHF_TARGET)
	vcmp.f32 s0, s1
#else
	vmov	s14, r0     // move from GPR 0 to float register
	vmov	s15, r1     // move from GPR 1 to float register
	vcmp.f32 s14, s15
#endif
	vmrs	apsr_nzcv, fpscr
	ITE(mi)
	movmi	r0, #1      // set result register to 1 if equal
	movpl	r0, #0
	bx	lr
END_COMPILERRT_FUNCTION(__ltsf2vfp)

NO_EXEC_STACK_DIRECTIVE