projects / rustc.git / blame
| Commit | Line | Data |
|---|---|---|
| 1a4d82fc JJ |
1 | //===-- unorddf2vfp.S - Implement unorddf2vfp ------------------------------===// |
| 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 int __unorddf2vfp(double a, double b); | |
| 14 | // | |
| 15 | // Returns one iff a or b is NaN | |
| 16 | // Uses Darwin calling convention where double precision arguments are passsed | |
| 17 | // like in GPR pairs. | |
| 18 | // | |
| 19 | .syntax unified | |
| 92a42be0 | 20 | .p2align 2 |
| 1a4d82fc JJ |
21 | DEFINE_COMPILERRT_FUNCTION(__unorddf2vfp) |
| 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 | movvs r0, #1 // set result register to 1 if "overflow" (any NaNs) | |
| 27 | movvc r0, #0 | |
| 28 | bx lr | |
| 29 | END_COMPILERRT_FUNCTION(__unorddf2vfp) |