1 1.1 joerg //===-- extendsfdf2vfp.S - Implement extendsfdf2vfp -----------------------===// 2 1.1 joerg // 3 1.1 joerg // The LLVM Compiler Infrastructure 4 1.1 joerg // 5 1.1 joerg // This file is dual licensed under the MIT and the University of Illinois Open 6 1.1 joerg // Source Licenses. See LICENSE.TXT for details. 7 1.1 joerg // 8 1.1 joerg //===----------------------------------------------------------------------===// 9 1.1 joerg 10 1.1 joerg #include "../assembly.h" 11 1.1 joerg 12 1.1 joerg // 13 1.1 joerg // extern double __extendsfdf2vfp(float a); 14 1.1 joerg // 15 1.1 joerg // Converts single precision float to double precision result. 16 1.1 joerg // Uses Darwin calling convention where a single precision parameter is 17 1.1 joerg // passed in a GPR and a double precision result is returned in R0/R1 pair. 18 1.1 joerg // 19 1.1 joerg .syntax unified 20 1.1.1.2 joerg .p2align 2 21 1.1 joerg DEFINE_COMPILERRT_FUNCTION(__extendsfdf2vfp) 22 1.1 joerg vmov s15, r0 // load float register from R0 23 1.1 joerg vcvt.f64.f32 d7, s15 // convert single to double 24 1.1 joerg vmov r0, r1, d7 // return result in r0/r1 pair 25 1.1 joerg bx lr 26 1.1 joerg END_COMPILERRT_FUNCTION(__extendsfdf2vfp) 27
Indexes created Wed Sep 24 05:09:52 GMT 2025