1 //===-- fixunsdfsivfp.S - Implement fixunsdfsivfp -------------------------===//
3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4 // See https://llvm.org/LICENSE.txt for license information.
5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
7 //===----------------------------------------------------------------------===//
9 #include "../assembly.h"
12 // extern unsigned int __fixunsdfsivfp(double a);
14 // Converts double precision float to a 32-bit unsigned int rounding towards
15 // zero. All negative values become zero.
16 // Uses Darwin calling convention where a double precision parameter is
17 // passed in GPR register pair.
21 DEFINE_COMPILERRT_FUNCTION(__fixunsdfsivfp)
22 #if defined(COMPILER_RT_ARMHF_TARGET)
26 vmov d7, r0, r1 // load double register from R0/R1
27 vcvt.u32.f64 s15, d7 // convert double to 32-bit int into s15
28 vmov r0, s15 // move s15 to result register
31 END_COMPILERRT_FUNCTION(__fixunsdfsivfp)
33 NO_EXEC_STACK_DIRECTIVE