2009-09-15 07:26:56 +08:00
|
|
|
//===-- extendsfdf2vfp.S - Implement extendsfdf2vfp -----------------------===//
|
|
|
|
|
//
|
|
|
|
|
// The LLVM Compiler Infrastructure
|
|
|
|
|
//
|
2010-11-17 06:13:33 +08:00
|
|
|
// This file is dual licensed under the MIT and the University of Illinois Open
|
|
|
|
|
// Source Licenses. See LICENSE.TXT for details.
|
2009-09-15 07:26:56 +08:00
|
|
|
//
|
|
|
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
|
|
2009-10-28 01:49:50 +08:00
|
|
|
#include "../assembly.h"
|
2009-09-15 07:26:56 +08:00
|
|
|
|
|
|
|
|
//
|
|
|
|
|
// 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.
|
|
|
|
|
//
|
2011-08-24 00:40:18 +08:00
|
|
|
.syntax unified
|
2010-04-22 06:36:23 +08:00
|
|
|
.align 2
|
2009-10-28 01:50:21 +08:00
|
|
|
DEFINE_COMPILERRT_FUNCTION(__extendsfdf2vfp)
|
2011-08-24 00:40:18 +08:00
|
|
|
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
|
2009-09-15 07:26:56 +08:00
|
|
|
bx lr
|
