1 //===-- truncdfsf2vfp.S - Implement truncdfsf2vfp -------------------------===// 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 float __truncdfsf2vfp(double a); 14 // 15 // Converts double precision float to signle precision result. 16 // Uses Darwin calling convention where a double precision parameter is 17 // passed in a R0/R1 pair and a signle precision result is returned in R0. 18 // 19 .syntax unified 20 .align 2 21 DEFINE_COMPILERRT_FUNCTION(__truncdfsf2vfp) 22 vmov d7, r0, r1 // load double from r0/r1 pair 23 vcvt.f32.f64 s15, d7 // convert double to single (trucate precision) 24 vmov r0, s15 // return result in r0 25 bx lr 26
