34 lines
1.0 KiB
ArmAsm
34 lines
1.0 KiB
ArmAsm
//===-- subdf3vfp.S - Implement subdf3vfp ---------------------------------===//
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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 __subdf3vfp(double a, double b);
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//
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// Returns difference between two double precision floating point numbers using
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// the Darwin calling convention where double arguments are passsed in GPR pairs
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//
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.syntax unified
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.p2align 2
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DEFINE_COMPILERRT_FUNCTION(__subdf3vfp)
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#if defined(COMPILER_RT_ARMHF_TARGET)
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vsub.f64 d0, d0, d1
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#else
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vmov d6, r0, r1 // move first param from r0/r1 pair into d6
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vmov d7, r2, r3 // move second param from r2/r3 pair into d7
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vsub.f64 d6, d6, d7
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vmov r0, r1, d6 // move result back to r0/r1 pair
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#endif
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bx lr
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END_COMPILERRT_FUNCTION(__subdf3vfp)
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NO_EXEC_STACK_DIRECTIVE
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