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
35 lines
1002 B
ArmAsm
35 lines
1002 B
ArmAsm
//===-- floatsisfvfp.S - Implement floatsisfvfp ---------------------------===//
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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 __floatsisfvfp(int a);
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//
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// Converts single precision float to a 32-bit int rounding towards zero.
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// Uses Darwin calling convention where a single precision result is
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// return in a GPR..
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//
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.syntax unified
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.p2align 2
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DEFINE_COMPILERRT_FUNCTION(__floatsisfvfp)
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#if defined(COMPILER_RT_ARMHF_TARGET)
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vmov s0, r0
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vcvt.f32.s32 s0, s0
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#else
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vmov s15, r0 // move int to float register s15
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vcvt.f32.s32 s15, s15 // convert 32-bit int in s15 to float in 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(__floatsisfvfp)
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NO_EXEC_STACK_DIRECTIVE
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