| Nick Kledzik | ad160c0 | 2009-09-14 23:26:56 +0000 | [diff] [blame] | 1 | //===-- fixunsdfsivfp.S - Implement fixunsdfsivfp -------------------------===// |
| 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 | ad160c0 | 2009-09-14 23:26:56 +0000 | [diff] [blame] | 7 | // |
| 8 | //===----------------------------------------------------------------------===// |
| 9 | |
| Daniel Dunbar | 7d50478 | 2009-10-27 17:49:50 +0000 | [diff] [blame] | 10 | #include "../assembly.h" |
| Nick Kledzik | ad160c0 | 2009-09-14 23:26:56 +0000 | [diff] [blame] | 11 | |
| 12 | // |
| 13 | // extern unsigned int __fixunsdfsivfp(double a); |
| 14 | // |
| 15 | // Converts double precision float to a 32-bit unsigned int rounding towards |
| 16 | // zero. All negative values become zero. |
| 17 | // Uses Darwin calling convention where a double precision parameter is |
| 18 | // passed in GPR register pair. |
| 19 | // |
| Bob Wilson | 7184d9f | 2011-08-23 16:40:18 +0000 | [diff] [blame^] | 20 | .syntax unified |
| Nick Kledzik | 8e7ebea | 2010-04-21 22:36:23 +0000 | [diff] [blame] | 21 | .align 2 |
| Daniel Dunbar | 9ff9371 | 2009-10-27 17:50:21 +0000 | [diff] [blame] | 22 | DEFINE_COMPILERRT_FUNCTION(__fixunsdfsivfp) |
| Bob Wilson | 7184d9f | 2011-08-23 16:40:18 +0000 | [diff] [blame^] | 23 | vmov d7, r0, r1 // load double register from R0/R1 |
| 24 | vcvt.u32.f64 s15, d7 // convert double to 32-bit int into s15 |
| 25 | vmov r0, s15 // move s15 to result register |
| Nick Kledzik | ad160c0 | 2009-09-14 23:26:56 +0000 | [diff] [blame] | 26 | bx lr |