1e80e978d6aa211056beddf4582390e374d1935abNick Kledzik//===-- ltdf2vfp.S - Implement ltdf2vfp -----------------------------------===// 2e80e978d6aa211056beddf4582390e374d1935abNick Kledzik// 3e80e978d6aa211056beddf4582390e374d1935abNick Kledzik// The LLVM Compiler Infrastructure 4e80e978d6aa211056beddf4582390e374d1935abNick Kledzik// 59ad441ffec97db647fee3725b3424284fb913e14Howard Hinnant// This file is dual licensed under the MIT and the University of Illinois Open 69ad441ffec97db647fee3725b3424284fb913e14Howard Hinnant// Source Licenses. See LICENSE.TXT for details. 7e80e978d6aa211056beddf4582390e374d1935abNick Kledzik// 8e80e978d6aa211056beddf4582390e374d1935abNick Kledzik//===----------------------------------------------------------------------===// 9e80e978d6aa211056beddf4582390e374d1935abNick Kledzik 1019336a2d6b9b375ac106125950f4ff09742d1aecDaniel Dunbar#include "../assembly.h" 11e80e978d6aa211056beddf4582390e374d1935abNick Kledzik 12e80e978d6aa211056beddf4582390e374d1935abNick Kledzik// 13e80e978d6aa211056beddf4582390e374d1935abNick Kledzik// extern double __ltdf2vfp(double a, double b); 14e80e978d6aa211056beddf4582390e374d1935abNick Kledzik// 15e80e978d6aa211056beddf4582390e374d1935abNick Kledzik// Returns one iff a < b and neither is NaN. 16e80e978d6aa211056beddf4582390e374d1935abNick Kledzik// Uses Darwin calling convention where double precision arguments are passsed 17e80e978d6aa211056beddf4582390e374d1935abNick Kledzik// like in GPR pairs. 18e80e978d6aa211056beddf4582390e374d1935abNick Kledzik// 19c20f862690410045fc8c77879f7e78918d2372e4Bob Wilson .syntax unified 20d016b38b065fbe3e22584728c3b8bc55fc8a5f9cNick Kledzik .align 2 21b4b1e8c5085cf83a50242057775a33ae4323d402Daniel DunbarDEFINE_COMPILERRT_FUNCTION(__ltdf2vfp) 22c20f862690410045fc8c77879f7e78918d2372e4Bob Wilson vmov d6, r0, r1 // load r0/r1 pair in double register 23c20f862690410045fc8c77879f7e78918d2372e4Bob Wilson vmov d7, r2, r3 // load r2/r3 pair in double register 24c20f862690410045fc8c77879f7e78918d2372e4Bob Wilson vcmp.f64 d6, d7 25c20f862690410045fc8c77879f7e78918d2372e4Bob Wilson vmrs apsr_nzcv, fpscr 26e80e978d6aa211056beddf4582390e374d1935abNick Kledzik movmi r0, #1 // set result register to 1 if equal 27e80e978d6aa211056beddf4582390e374d1935abNick Kledzik movpl r0, #0 28e80e978d6aa211056beddf4582390e374d1935abNick Kledzik bx lr 29