| //===-- subdf3vfp.S - Implement subdf3vfp ---------------------------------===// |
| // |
| // The LLVM Compiler Infrastructure |
| // |
| // This file is dual licensed under the MIT and the University of Illinois Open |
| // Source Licenses. See LICENSE.TXT for details. |
| // |
| //===----------------------------------------------------------------------===// |
| |
| #include "../assembly.h" |
| |
| // |
| // extern double __subdf3vfp(double a, double b); |
| // |
| // Returns difference between two double precision floating point numbers using |
| // the Darwin calling convention where double arguments are passsed in GPR pairs |
| // |
| .syntax unified |
| .p2align 2 |
| DEFINE_COMPILERRT_FUNCTION(__subdf3vfp) |
| #if defined(COMPILER_RT_ARMHF_TARGET) |
| vsub.f64 d0, d0, d1 |
| #else |
| vmov d6, r0, r1 // move first param from r0/r1 pair into d6 |
| vmov d7, r2, r3 // move second param from r2/r3 pair into d7 |
| vsub.f64 d6, d6, d7 |
| vmov r0, r1, d6 // move result back to r0/r1 pair |
| #endif |
| bx lr |
| END_COMPILERRT_FUNCTION(__subdf3vfp) |
| |
| NO_EXEC_STACK_DIRECTIVE |
| |
