1//===-- nesf2vfp.S - Implement nesf2vfp -----------------------------------===//
2//
3// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4// See https://llvm.org/LICENSE.txt for license information.
5// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6//
7//===----------------------------------------------------------------------===//
8
9#include "../assembly.h"
10
11//
12// extern int __nesf2vfp(float a, float b);
13//
14// Returns one iff a != b and neither is NaN.
15// Uses Darwin calling convention where single precision arguments are passsed
16// like 32-bit ints
17//
18 .syntax unified
19 .p2align 2
20DEFINE_COMPILERRT_FUNCTION(__nesf2vfp)
21#if defined(COMPILER_RT_ARMHF_TARGET)
22 vcmp.f32 s0, s1
23#else
24 vmov s14, r0 // move from GPR 0 to float register
25 vmov s15, r1 // move from GPR 1 to float register
26 vcmp.f32 s14, s15
27#endif
28 vmrs apsr_nzcv, fpscr
29 ITE(ne)
30 movne r0, #1 // set result register to 1 if unequal
31 moveq r0, #0
32 bx lr
33END_COMPILERRT_FUNCTION(__nesf2vfp)
34
35NO_EXEC_STACK_DIRECTIVE
36
37

source code of compiler-rt/lib/builtins/arm/nesf2vfp.S