derek.holloway
7502bf64a4
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65 lines
1.7 KiB
ArmAsm
65 lines
1.7 KiB
ArmAsm
//===-- cmpdf2.S - double-precision floating point comparison -------------===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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//
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// This function has the semantics of GNU __cmpdf2: it's a three-way compare
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// which returns <0 if x<y, 0 if x==y, and >0 if x>y. If the result is
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// unordered (i.e. x or y or both is NaN) then it returns >0.
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//
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// This also makes it suitable for use as all of __eqdf2, __nedf2, __ltdf2 or
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// __ledf2.
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//
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//===----------------------------------------------------------------------===//
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#include "../assembly.h"
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#include "crt_endian.h"
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.syntax unified
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.text
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.p2align 2
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op0h .req xh
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op0l .req xl
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op1h .req yh
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op1l .req yl
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.macro SetReturnRegister
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mov r0, #0
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movhi r0, #1
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movlo r0, #-1
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.endm
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.macro SetReturnRegisterNE
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movne r0, #-1
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movhi r0, #1
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.endm
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#if __ARM_PCS_VFP
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DEFINE_COMPILERRT_FUNCTION(__cmpdf2)
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push {r4, lr}
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VMOV_FROM_DOUBLE(r0, r1, d0)
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VMOV_FROM_DOUBLE(r2, r3, d1)
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bl __compiler_rt_softfp_cmpdf2
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pop {r4, pc}
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#else
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DEFINE_COMPILERRT_FUNCTION_ALIAS(__cmpdf2, __compiler_rt_softfp_cmpdf2)
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#endif
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DEFINE_COMPILERRT_FUNCTION_ALIAS(__ledf2, __cmpdf2)
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DEFINE_COMPILERRT_FUNCTION_ALIAS(__ltdf2, __cmpdf2)
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DEFINE_COMPILERRT_FUNCTION_ALIAS(__eqdf2, __cmpdf2)
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DEFINE_COMPILERRT_FUNCTION_ALIAS(__nedf2, __cmpdf2)
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DEFINE_COMPILERRT_FUNCTION(__compiler_rt_softfp_cmpdf2)
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#include "dcmp.h"
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LOCAL_LABEL(NaN):
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mov r0, #+1
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bx lr
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END_COMPILERRT_FUNCTION(__compiler_rt_softfp_cmpdf2)
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NO_EXEC_STACK_DIRECTIVE
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