| Nick Kledzik | b9c6e4a | 2009-09-11 20:02:01 +0000 | [diff] [blame] | 1 | //===-- subdf3vfp.S - Implement subdf3vfp ---------------------------------===// |
| 2 | // |
| 3 | // The LLVM Compiler Infrastructure |
| 4 | // |
| Howard Hinnant | 5b791f6 | 2010-11-16 22:13:33 +0000 | [diff] [blame] | 5 | // This file is dual licensed under the MIT and the University of Illinois Open |
| 6 | // Source Licenses. See LICENSE.TXT for details. |
| Nick Kledzik | b9c6e4a | 2009-09-11 20:02:01 +0000 | [diff] [blame] | 7 | // |
| 8 | //===----------------------------------------------------------------------===// |
| 9 | |
| Daniel Dunbar | 7d50478 | 2009-10-27 17:49:50 +0000 | [diff] [blame] | 10 | #include "../assembly.h" |
| Nick Kledzik | b9c6e4a | 2009-09-11 20:02:01 +0000 | [diff] [blame] | 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 | // |
| Bob Wilson | 7184d9f | 2011-08-23 16:40:18 +0000 | [diff] [blame] | 18 | .syntax unified |
| Nick Kledzik | 8e7ebea | 2010-04-21 22:36:23 +0000 | [diff] [blame] | 19 | .align 2 |
| Daniel Dunbar | 9ff9371 | 2009-10-27 17:50:21 +0000 | [diff] [blame] | 20 | DEFINE_COMPILERRT_FUNCTION(__subdf3vfp) |
| Bob Wilson | 7184d9f | 2011-08-23 16:40:18 +0000 | [diff] [blame] | 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 |
| Nick Kledzik | b9c6e4a | 2009-09-11 20:02:01 +0000 | [diff] [blame] | 25 | bx lr |