| Nick Kledzik | e80e978 | 2009-09-12 01:23:48 +0000 | [diff] [blame] | 1 | //===-- gtdf2vfp.S - Implement gtdf2vfp -----------------------------------===// |
| 2 | // |
| 3 | // The LLVM Compiler Infrastructure |
| 4 | // |
| Howard Hinnant | 9ad441f | 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 | e80e978 | 2009-09-12 01:23:48 +0000 | [diff] [blame] | 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 double __gtdf2vfp(double a, double b); |
| 14 | // |
| 15 | // Returns one iff a > b and neither is NaN. |
| 16 | // Uses Darwin calling convention where double precision arguments are passsed |
| 17 | // like in GPR pairs. |
| 18 | // |
| Bob Wilson | c20f862 | 2011-08-23 16:40:18 +0000 | [diff] [blame] | 19 | .syntax unified |
| Nick Kledzik | d016b38 | 2010-04-21 22:36:23 +0000 | [diff] [blame] | 20 | .align 2 |
| Daniel Dunbar | b4b1e8c | 2009-10-27 17:50:21 +0000 | [diff] [blame] | 21 | DEFINE_COMPILERRT_FUNCTION(__gtdf2vfp) |
| Bob Wilson | c20f862 | 2011-08-23 16:40:18 +0000 | [diff] [blame] | 22 | vmov d6, r0, r1 // load r0/r1 pair in double register |
| 23 | vmov d7, r2, r3 // load r2/r3 pair in double register |
| 24 | vcmp.f64 d6, d7 |
| 25 | vmrs apsr_nzcv, fpscr |
| Nick Kledzik | e80e978 | 2009-09-12 01:23:48 +0000 | [diff] [blame] | 26 | movgt r0, #1 // set result register to 1 if equal |
| 27 | movle r0, #0 |
| 28 | bx lr |