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33 lines
1.0 KiB
33 lines
1.0 KiB
7 months ago
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//===-- truncdfsf2vfp.S - Implement truncdfsf2vfp -------------------------===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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#include "../assembly.h"
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//
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// extern float __truncdfsf2vfp(double a);
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//
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// Converts double precision float to signle precision result.
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// Uses Darwin calling convention where a double precision parameter is
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// passed in a R0/R1 pair and a signle precision result is returned in R0.
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//
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.syntax unified
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.p2align 2
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DEFINE_COMPILERRT_FUNCTION(__truncdfsf2vfp)
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#if defined(COMPILER_RT_ARMHF_TARGET)
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vcvt.f32.f64 s0, d0
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#else
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vmov d7, r0, r1 // load double from r0/r1 pair
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vcvt.f32.f64 s15, d7 // convert double to single (trucate precision)
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vmov r0, s15 // return result in r0
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#endif
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bx lr
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END_COMPILERRT_FUNCTION(__truncdfsf2vfp)
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NO_EXEC_STACK_DIRECTIVE
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