1 //===-- subdf3vfp.S - Implement subdf3vfp ---------------------------------===//
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
7 //===----------------------------------------------------------------------===//
9 #include "../assembly.h"
12 // extern double __subdf3vfp(double a, double b);
14 // Returns difference between two double precision floating point numbers using
15 // the Darwin calling convention where double arguments are passsed in GPR pairs
19 DEFINE_COMPILERRT_FUNCTION(__subdf3vfp)
20 #if defined(COMPILER_RT_ARMHF_TARGET)
23 vmov d6, r0, r1 // move first param from r0/r1 pair into d6
24 vmov d7, r2, r3 // move second param from r2/r3 pair into d7
26 vmov r0, r1, d6 // move result back to r0/r1 pair
29 END_COMPILERRT_FUNCTION(__subdf3vfp)
31 NO_EXEC_STACK_DIRECTIVE