diff options
Diffstat (limited to 'compiler-rt/lib/builtins/arm/extendsfdf2vfp.S')
| -rw-r--r-- | compiler-rt/lib/builtins/arm/extendsfdf2vfp.S | 32 |
1 files changed, 32 insertions, 0 deletions
diff --git a/compiler-rt/lib/builtins/arm/extendsfdf2vfp.S b/compiler-rt/lib/builtins/arm/extendsfdf2vfp.S new file mode 100644 index 000000000000..37c8be8dcd9c --- /dev/null +++ b/compiler-rt/lib/builtins/arm/extendsfdf2vfp.S @@ -0,0 +1,32 @@ +//===-- 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 + |