| Stephen Hines | 2d1fdb2 | 2014-05-28 23:58:16 -0700 | [diff] [blame^] | 1 | //===-- subdf3vfp.S - Implement subdf3vfp ---------------------------------===// |
| 2 | // |
| 3 | // The LLVM Compiler Infrastructure |
| 4 | // |
| 5 | // This file is dual licensed under the MIT and the University of Illinois Open |
| 6 | // Source Licenses. See LICENSE.TXT for details. |
| 7 | // |
| 8 | //===----------------------------------------------------------------------===// |
| 9 | |
| 10 | #include "../assembly.h" |
| 11 | |
| 12 | // |
| 13 | // extern double __subdf3vfp(double a, double b); |
| 14 | // |
| 15 | // Returns difference between two double precision floating point numbers using |
| 16 | // the Darwin calling convention where double arguments are passsed in GPR pairs |
| 17 | // |
| 18 | .syntax unified |
| 19 | .p2align 2 |
| 20 | DEFINE_COMPILERRT_FUNCTION(__subdf3vfp) |
| 21 | vmov d6, r0, r1 // move first param from r0/r1 pair into d6 |
| 22 | vmov d7, r2, r3 // move second param from r2/r3 pair into d7 |
| 23 | vsub.f64 d6, d6, d7 |
| 24 | vmov r0, r1, d6 // move result back to r0/r1 pair |
| 25 | bx lr |
| 26 | END_COMPILERRT_FUNCTION(__subdf3vfp) |