| //===-- extendsfdf2vfp.S - Implement extendsfdf2vfp -----------------------===// |
| // |
| // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
| // See https://llvm.org/LICENSE.txt for license information. |
| // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
| // |
| //===----------------------------------------------------------------------===// |
| |
| #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. |
| // |
| .syntax unified |
| .p2align 2 |
| DEFINE_COMPILERRT_FUNCTION(__extendsfdf2vfp) |
| #if defined(COMPILER_RT_ARMHF_TARGET) |
| vcvt.f64.f32 d0, s0 |
| #else |
| vmov s15, r0 // load float register from R0 |
| vcvt.f64.f32 d7, s15 // convert single to double |
| vmov r0, r1, d7 // return result in r0/r1 pair |
| #endif |
| bx lr |
| END_COMPILERRT_FUNCTION(__extendsfdf2vfp) |
| |
| NO_EXEC_STACK_DIRECTIVE |
| |
