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Diffstat (limited to 'lib/builtins/arm/truncdfsf2vfp.S')
| -rw-r--r-- | lib/builtins/arm/truncdfsf2vfp.S | 26 |
1 files changed, 26 insertions, 0 deletions
diff --git a/lib/builtins/arm/truncdfsf2vfp.S b/lib/builtins/arm/truncdfsf2vfp.S new file mode 100644 index 000000000000..fa4362c45e77 --- /dev/null +++ b/lib/builtins/arm/truncdfsf2vfp.S @@ -0,0 +1,26 @@ +//===-- truncdfsf2vfp.S - Implement truncdfsf2vfp -------------------------===// +// +// 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 float __truncdfsf2vfp(double a); +// +// Converts double precision float to signle precision result. +// Uses Darwin calling convention where a double precision parameter is +// passed in a R0/R1 pair and a signle precision result is returned in R0. +// + .syntax unified + .p2align 2 +DEFINE_COMPILERRT_FUNCTION(__truncdfsf2vfp) + 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 + bx lr +END_COMPILERRT_FUNCTION(__truncdfsf2vfp) |