| //===-- extendsfdf2vfp.S - Implement extendsfdf2vfp -----------------------===// |
| // |
| // The LLVM Compiler Infrastructure |
| // |
| // This file is dual licensed under the MIT and the University of Illinois Open |
| // Source Licenses. See LICENSE.TXT for details. |
| // |
| //===----------------------------------------------------------------------===// |
| |
| #include "../assembly.h" |
| |
| // |
| // extern double __extendsfdf2vfp(float a); |
| // |
| // Converts single precision float to double precision result. |
| // Uses Darwin calling convention where a single precision parameter is |
| // passed in a GPR and a double precision result is returned in R0/R1 pair. |
| // |
| .align 2 |
| DEFINE_COMPILERRT_FUNCTION(__extendsfdf2vfp) |
| fmsr s15, r0 // load float register from R0 |
| fcvtds d7, s15 // convert single to double |
| fmrrd r0, r1, d7 // return result in r0/r1 pair |
| bx lr |
