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
//===-- truncdfsf2vfp.S - Implement truncdfsf2vfp -------------------------===//
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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 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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