| Nick Kledzik | ad160c0 | 2009-09-14 23:26:56 +0000 | [diff] [blame] | 1 | //===-- fixdfsivfp.S - Implement fixdfsivfp -----------------------===// |
| 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 | 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 int __fixdfsivfp(double a); |
| 14 | // |
| 15 | // Converts double precision float to a 32-bit int rounding towards zero. |
| 16 | // Uses Darwin calling convention where a double precision parameter is |
| 17 | // passed in GPR register pair. |
| 18 | // |
| Daniel Dunbar | 9ff9371 | 2009-10-27 17:50:21 +0000 | [diff] [blame^] | 19 | DEFINE_COMPILERRT_FUNCTION(__fixdfsivfp) |
| Nick Kledzik | ad160c0 | 2009-09-14 23:26:56 +0000 | [diff] [blame] | 20 | fmdrr d7, r0, r1 // load double register from R0/R1 |
| 21 | ftosizd s15, d7 // convert double to 32-bit int into s15 |
| 22 | fmrs r0, s15 // move s15 to result register |
| 23 | bx lr |