30 lines
957 B
ArmAsm
30 lines
957 B
ArmAsm
//===-- 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)
|
|
|
|
NO_EXEC_STACK_DIRECTIVE
|
|
|