1*0b57cec5SDimitry Andric//===-- extendsfdf2vfp.S - Implement extendsfdf2vfp -----------------------===// 2*0b57cec5SDimitry Andric// 3*0b57cec5SDimitry Andric// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. 4*0b57cec5SDimitry Andric// See https://llvm.org/LICENSE.txt for license information. 5*0b57cec5SDimitry Andric// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception 6*0b57cec5SDimitry Andric// 7*0b57cec5SDimitry Andric//===----------------------------------------------------------------------===// 8*0b57cec5SDimitry Andric 9*0b57cec5SDimitry Andric#include "../assembly.h" 10*0b57cec5SDimitry Andric 11*0b57cec5SDimitry Andric// 12*0b57cec5SDimitry Andric// extern double __extendsfdf2vfp(float a); 13*0b57cec5SDimitry Andric// 14*0b57cec5SDimitry Andric// Converts single precision float to double precision result. 15*0b57cec5SDimitry Andric// Uses Darwin calling convention where a single precision parameter is 16*0b57cec5SDimitry Andric// passed in a GPR and a double precision result is returned in R0/R1 pair. 17*0b57cec5SDimitry Andric// 18*0b57cec5SDimitry Andric .syntax unified 19*0b57cec5SDimitry Andric .p2align 2 20*0b57cec5SDimitry AndricDEFINE_COMPILERRT_FUNCTION(__extendsfdf2vfp) 21*0b57cec5SDimitry Andric#if defined(COMPILER_RT_ARMHF_TARGET) 22*0b57cec5SDimitry Andric vcvt.f64.f32 d0, s0 23*0b57cec5SDimitry Andric#else 24*0b57cec5SDimitry Andric vmov s15, r0 // load float register from R0 25*0b57cec5SDimitry Andric vcvt.f64.f32 d7, s15 // convert single to double 26*0b57cec5SDimitry Andric vmov r0, r1, d7 // return result in r0/r1 pair 27*0b57cec5SDimitry Andric#endif 28*0b57cec5SDimitry Andric bx lr 29*0b57cec5SDimitry AndricEND_COMPILERRT_FUNCTION(__extendsfdf2vfp) 30*0b57cec5SDimitry Andric 31*0b57cec5SDimitry AndricNO_EXEC_STACK_DIRECTIVE 32*0b57cec5SDimitry Andric 33