1 //===-- ltdf2vfp.S - Implement ltdf2vfp -----------------------------------===// 2 // 3 // The LLVM Compiler Infrastructure 4 // 5 // This file is dual licensed under the MIT and the University of Illinois Open 6 // Source Licenses. See LICENSE.TXT for details. 7 // 8 //===----------------------------------------------------------------------===// 9 10 #include "../assembly.h" 11 12 // 13 // extern double __ltdf2vfp(double a, double b); 14 // 15 // Returns one iff a < b and neither is NaN. 16 // Uses Darwin calling convention where double precision arguments are passsed 17 // like in GPR pairs. 18 // 19 .syntax unified 20 .p2align 2 21 DEFINE_COMPILERRT_FUNCTION(__ltdf2vfp) 22 vmov d6, r0, r1 // load r0/r1 pair in double register 23 vmov d7, r2, r3 // load r2/r3 pair in double register 24 vcmp.f64 d6, d7 25 vmrs apsr_nzcv, fpscr 26 movmi r0, #1 // set result register to 1 if equal 27 movpl r0, #0 28 bx lr 29 END_COMPILERRT_FUNCTION(__ltdf2vfp) 30 31 NO_EXEC_STACK_DIRECTIVE 32 33