| //===-- truncdfsf2vfp.S - Implement truncdfsf2vfp -------------------------===// |
| // |
| // 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 float __truncdfsf2vfp(double a); |
| // |
| // Converts double precision float to single precision result. |
| // Uses Darwin calling convention where a double precision parameter is |
| // passed in a R0/R1 pair and a single precision result is returned in R0. |
| // |
| .syntax unified |
| .p2align 2 |
| DEFINE_COMPILERRT_FUNCTION(__truncdfsf2vfp) |
| #if defined(COMPILER_RT_ARMHF_TARGET) |
| vcvt.f32.f64 s0, d0 |
| #else |
| vmov d7, r0, r1 // load double from r0/r1 pair |
| vcvt.f32.f64 s15, d7 // convert double to single (trucate precision) |
| vmov r0, s15 // return result in r0 |
| #endif |
| bx lr |
| END_COMPILERRT_FUNCTION(__truncdfsf2vfp) |
| |
| NO_EXEC_STACK_DIRECTIVE |
| |
