| Nick Kledzik | d47c2cf | 2009-09-11 20:02:01 +0000 | [diff] [blame] | 1 | //===-- subsf3vfp.S - Implement subsf3vfp ---------------------------------===// |
| 2 | // |
| 3 | // The LLVM Compiler Infrastructure |
| 4 | // |
| Howard Hinnant | 9ad441f | 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 | d47c2cf | 2009-09-11 20:02:01 +0000 | [diff] [blame] | 7 | // |
| 8 | //===----------------------------------------------------------------------===// |
| 9 | |
| Daniel Dunbar | 19336a2 | 2009-10-27 17:49:50 +0000 | [diff] [blame] | 10 | #include "../assembly.h" |
| Nick Kledzik | d47c2cf | 2009-09-11 20:02:01 +0000 | [diff] [blame] | 11 | |
| 12 | // |
| 13 | // extern float __subsf3vfp(float a, float b); |
| 14 | // |
| 15 | // Returns the difference between two single precision floating point numbers |
| 16 | // using the Darwin calling convention where single arguments are passsed |
| 17 | // like 32-bit ints. |
| 18 | // |
| Nick Kledzik | d016b38 | 2010-04-21 22:36:23 +0000 | [diff] [blame] | 19 | .align 2 |
| Daniel Dunbar | b4b1e8c | 2009-10-27 17:50:21 +0000 | [diff] [blame] | 20 | DEFINE_COMPILERRT_FUNCTION(__subsf3vfp) |
| Nick Kledzik | d47c2cf | 2009-09-11 20:02:01 +0000 | [diff] [blame] | 21 | fmsr s14, r0 // move first param from r0 into float register |
| 22 | fmsr s15, r1 // move second param from r1 into float register |
| 23 | fsubs s14, s14, s15 |
| 24 | fmrs r0, s14 // move result back to r0 |
| 25 | bx lr |