1 //===-- subdf3vfp.S - Implement subdf3vfp ---------------------------------===//
3 // The LLVM Compiler Infrastructure
5 // This file is dual licensed under the MIT and the University of Illinois Open
6 // Source Licenses. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 #include "../assembly.h"
13 // extern double __subdf3vfp(double a, double b);
15 // Returns difference between two double precision floating point numbers using
16 // the Darwin calling convention where double arguments are passsed in GPR pairs
20 DEFINE_COMPILERRT_FUNCTION(__subdf3vfp)
21 #if defined(COMPILER_RT_ARMHF_TARGET)
24 vmov d6, r0, r1 // move first param from r0/r1 pair into d6
25 vmov d7, r2, r3 // move second param from r2/r3 pair into d7
27 vmov r0, r1, d6 // move result back to r0/r1 pair
30 END_COMPILERRT_FUNCTION(__subdf3vfp)
32 NO_EXEC_STACK_DIRECTIVE