26 lines
877 B
ArmAsm
26 lines
877 B
ArmAsm
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//===-- extendsfdf2vfp.S - Implement extendsfdf2vfp -----------------------===//
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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 double __extendsfdf2vfp(float a);
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//
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// Converts single precision float to double precision result.
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// Uses Darwin calling convention where a single precision parameter is
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// passed in a GPR and a double precision result is returned in R0/R1 pair.
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//
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.syntax unified
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.align 2
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DEFINE_COMPILERRT_FUNCTION(__extendsfdf2vfp)
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vmov s15, r0 // load float register from R0
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vcvt.f64.f32 d7, s15 // convert single to double
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vmov r0, r1, d7 // return result in r0/r1 pair
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bx lr
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