| Nick Kledzik | ad160c0 | 2009-09-14 23:26:56 +0000 | [diff] [blame] | 1 | //===-- floatsidfvfp.S - Implement floatsidfvfp ---------------------------===// |
| 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 double __floatsidfvfp(int a); |
| 14 | // |
| 15 | // Converts a 32-bit int to a double precision float. |
| 16 | // Uses Darwin calling convention where a double precision result is |
| 17 | // return in GPR register pair. |
| 18 | // |
| Nick Kledzik | 8e7ebea | 2010-04-21 22:36:23 +0000 | [diff] [blame] | 19 | .align 2 |
| Daniel Dunbar | 9ff9371 | 2009-10-27 17:50:21 +0000 | [diff] [blame] | 20 | DEFINE_COMPILERRT_FUNCTION(__floatsidfvfp) |
| Nick Kledzik | ad160c0 | 2009-09-14 23:26:56 +0000 | [diff] [blame] | 21 | fmsr s15, r0 // move int to float register s15 |
| 22 | fsitod d7, s15 // convert 32-bit int in s15 to double in d7 |
| 23 | fmrrd r0, r1, d7 // move d7 to result register pair r0/r1 |
| 24 | bx lr |