| Nick Kledzik | 9130011 | 2009-09-12 01:23:48 +0000 | [diff] [blame] | 1 | //===-- nesf2vfp.S - Implement nesf2vfp -----------------------------------===// |
| 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 | 9130011 | 2009-09-12 01:23:48 +0000 | [diff] [blame] | 7 | // |
| 8 | //===----------------------------------------------------------------------===// |
| 9 | |
| Daniel Dunbar | 7d50478 | 2009-10-27 17:49:50 +0000 | [diff] [blame] | 10 | #include "../assembly.h" |
| Nick Kledzik | 9130011 | 2009-09-12 01:23:48 +0000 | [diff] [blame] | 11 | |
| 12 | // |
| 13 | // extern int __nesf2vfp(float a, float b); |
| 14 | // |
| 15 | // Returns one iff a != b and neither is NaN. |
| 16 | // Uses Darwin calling convention where single precision arguments are passsed |
| 17 | // like 32-bit ints |
| 18 | // |
| Bob Wilson | 7184d9f | 2011-08-23 16:40:18 +0000 | [diff] [blame^] | 19 | .syntax unified |
| Nick Kledzik | 8e7ebea | 2010-04-21 22:36:23 +0000 | [diff] [blame] | 20 | .align 2 |
| Daniel Dunbar | 9ff9371 | 2009-10-27 17:50:21 +0000 | [diff] [blame] | 21 | DEFINE_COMPILERRT_FUNCTION(__nesf2vfp) |
| Bob Wilson | 7184d9f | 2011-08-23 16:40:18 +0000 | [diff] [blame^] | 22 | vmov s14, r0 // move from GPR 0 to float register |
| 23 | vmov s15, r1 // move from GPR 1 to float register |
| 24 | vcmp.f32 s14, s15 |
| 25 | vmrs apsr_nzcv, fpscr |
| Nick Kledzik | 9130011 | 2009-09-12 01:23:48 +0000 | [diff] [blame] | 26 | movne r0, #1 // set result register to 1 if unequal |
| 27 | moveq r0, #0 |
| 28 | bx lr |
| 29 | |