1//===-- subsf3vfp.S - Implement subsf3vfp ---------------------------------===// 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 float __subsf3vfp(float a, float b); 13// 14// Returns the difference between two single precision floating point numbers 15// using the Darwin calling convention where single arguments are passsed 16// like 32-bit ints. 17// 18 .syntax unified 19 .p2align 2 20DEFINE_COMPILERRT_FUNCTION(__subsf3vfp) 21#if defined(COMPILER_RT_ARMHF_TARGET) 22 vsub.f32 s0, s0, s1 23#else 24 vmov s14, r0 // move first param from r0 into float register 25 vmov s15, r1 // move second param from r1 into float register 26 vsub.f32 s14, s14, s15 27 vmov r0, s14 // move result back to r0 28#endif 29 bx lr 30END_COMPILERRT_FUNCTION(__subsf3vfp) 31 32NO_EXEC_STACK_DIRECTIVE 33 34