| Stephen Hines | 2d1fdb2 | 2014-05-28 23:58:16 -0700 | [diff] [blame^] | 1 | //===-- ltdf2vfp.S - Implement ltdf2vfp -----------------------------------===// |
| 2 | // |
| 3 | // The LLVM Compiler Infrastructure |
| 4 | // |
| 5 | // This file is dual licensed under the MIT and the University of Illinois Open |
| 6 | // Source Licenses. See LICENSE.TXT for details. |
| 7 | // |
| 8 | //===----------------------------------------------------------------------===// |
| 9 | |
| 10 | #include "../assembly.h" |
| 11 | |
| 12 | // |
| 13 | // extern double __ltdf2vfp(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 | // |
| 19 | .syntax unified |
| 20 | .p2align 2 |
| 21 | DEFINE_COMPILERRT_FUNCTION(__ltdf2vfp) |
| 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 |
| 26 | movmi r0, #1 // set result register to 1 if equal |
| 27 | movpl r0, #0 |
| 28 | bx lr |
| 29 | END_COMPILERRT_FUNCTION(__ltdf2vfp) |