1 1.1 joerg //===-- truncdfsf2vfp.S - Implement truncdfsf2vfp -------------------------===// 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 float __truncdfsf2vfp(double a); 14 1.1 joerg // 15 1.1 joerg // Converts double precision float to signle precision result. 16 1.1 joerg // Uses Darwin calling convention where a double precision parameter is 17 1.1 joerg // passed in a R0/R1 pair and a signle precision result is returned in R0. 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(__truncdfsf2vfp) 22 1.1 joerg vmov d7, r0, r1 // load double from r0/r1 pair 23 1.1 joerg vcvt.f32.f64 s15, d7 // convert double to single (trucate precision) 24 1.1 joerg vmov r0, s15 // return result in r0 25 1.1 joerg bx lr 26 1.1 joerg END_COMPILERRT_FUNCTION(__truncdfsf2vfp) 27
Indexes created Tue Sep 23 14:10:03 GMT 2025