| Nick Kledzik | e80e978 | 2009-09-12 01:23:48 +0000 | [diff] [blame] | 1 | //===-- nesf2vfp.S - Implement nesf2vfp -----------------------------------===// |
| 2 | // |
| 3 | // The LLVM Compiler Infrastructure |
| 4 | // |
| 5 | // This file is distributed under the University of Illinois Open Source |
| 6 | // License. See LICENSE.TXT for details. |
| 7 | // |
| 8 | //===----------------------------------------------------------------------===// |
| 9 | |
| Daniel Dunbar | 19336a2 | 2009-10-27 17:49:50 +0000 | [diff] [blame] | 10 | #include "../assembly.h" |
| Nick Kledzik | e80e978 | 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 | // |
| 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(__nesf2vfp) |
| Nick Kledzik | e80e978 | 2009-09-12 01:23:48 +0000 | [diff] [blame] | 21 | fmsr s14, r0 // move from GPR 0 to float register |
| 22 | fmsr s15, r1 // move from GPR 1 to float register |
| 23 | fcmps s14, s15 |
| 24 | fmstat |
| 25 | movne r0, #1 // set result register to 1 if unequal |
| 26 | moveq r0, #0 |
| 27 | bx lr |
| 28 | |