36 lines
1.0 KiB
ArmAsm
36 lines
1.0 KiB
ArmAsm
//===-- fixunsdfsivfp.S - Implement fixunsdfsivfp -------------------------===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is dual licensed under the MIT and the University of Illinois Open
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// Source Licenses. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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#include "../assembly.h"
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//
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// extern unsigned int __fixunsdfsivfp(double a);
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//
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// Converts double precision float to a 32-bit unsigned int rounding towards
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// zero. All negative values become zero.
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// Uses Darwin calling convention where a double precision parameter is
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// passed in GPR register pair.
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//
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.syntax unified
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.p2align 2
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DEFINE_COMPILERRT_FUNCTION(__fixunsdfsivfp)
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#if defined(COMPILER_RT_ARMHF_TARGET)
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vcvt.u32.f64 s0, d0
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vmov r0, s0
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#else
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vmov d7, r0, r1 // load double register from R0/R1
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vcvt.u32.f64 s15, d7 // convert double to 32-bit int into s15
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vmov r0, s15 // move s15 to result register
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#endif
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bx lr
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END_COMPILERRT_FUNCTION(__fixunsdfsivfp)
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NO_EXEC_STACK_DIRECTIVE
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