1//===-- ltdf2vfp.S - Implement ltdf2vfp -----------------------------------===// 2// 3// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. 4// See https://llvm.org/LICENSE.txt for license information. 5// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception 6// 7//===----------------------------------------------------------------------===// 8 9#include "../assembly.h" 10 11// 12// extern double __ltdf2vfp(double a, double b); 13// 14// Returns one iff a < b and neither is NaN. 15// Uses Darwin calling convention where double precision arguments are passsed 16// like in GPR pairs. 17// 18 .syntax unified 19 .p2align 2 20DEFINE_COMPILERRT_FUNCTION(__ltdf2vfp) 21#if defined(COMPILER_RT_ARMHF_TARGET) 22 vcmp.f64 d0, d1 23#else 24 vmov d6, r0, r1 // load r0/r1 pair in double register 25 vmov d7, r2, r3 // load r2/r3 pair in double register 26 vcmp.f64 d6, d7 27#endif 28 vmrs apsr_nzcv, fpscr 29 ITE(mi) 30 movmi r0, #1 // set result register to 1 if equal 31 movpl r0, #0 32 bx lr 33END_COMPILERRT_FUNCTION(__ltdf2vfp) 34 35NO_EXEC_STACK_DIRECTIVE 36 37