9c287bca23
The `-target` impacts the CC for the builtins. HF targets (with either floating point ABI) always use AAPCS VFP for the builtins unless they are AEABI builtins, in which case they use AAPCS. Non-HF targets (with either floating point ABI) always use AAPCS for the builtins and AAPCS for the AEABI builtins. This introduces the thunks necessary to switch CC for the floating point operations. This is not currently enabled, and should be dependent on the target being used to build compiler-rt. However, as a stop-gap, a define can be added for ASFLAGS to get the thunks. llvm-svn: 291677
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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