diff options
Diffstat (limited to 'contrib/llvm-project/compiler-rt/lib/builtins/arm/truncdfsf2vfp.S')
| -rw-r--r-- | contrib/llvm-project/compiler-rt/lib/builtins/arm/truncdfsf2vfp.S | 32 |
1 files changed, 32 insertions, 0 deletions
diff --git a/contrib/llvm-project/compiler-rt/lib/builtins/arm/truncdfsf2vfp.S b/contrib/llvm-project/compiler-rt/lib/builtins/arm/truncdfsf2vfp.S new file mode 100644 index 000000000000..e1c171262a78 --- /dev/null +++ b/contrib/llvm-project/compiler-rt/lib/builtins/arm/truncdfsf2vfp.S @@ -0,0 +1,32 @@ +//===-- 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 + |