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//===-- ltdf2vfp.S - Implement ltdf2vfp -----------------------------------===//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
#include "../assembly.h"
// extern double __ltdf2vfp(double a, double b);
// Returns one iff a < b and neither is NaN.
// Uses Darwin calling convention where double precision arguments are passsed
// like in GPR pairs.
.syntax unified
.p2align 2
vcmp.f64 d0, d1
vmov d6, r0, r1 // load r0/r1 pair in double register
vmov d7, r2, r3 // load r2/r3 pair in double register
vcmp.f64 d6, d7
vmrs apsr_nzcv, fpscr
movmi r0, #1 // set result register to 1 if equal
movpl r0, #0
bx lr