derek.holloway
7502bf64a4
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61 lines
1.6 KiB
ArmAsm
61 lines
1.6 KiB
ArmAsm
//===-- aeabi_idivmod.S - EABI idivmod implementation ---------------------===//
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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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#include "../assembly.h"
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// struct { int quot, int rem} __aeabi_idivmod(int numerator, int denominator) {
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// int rem, quot;
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// quot = __divmodsi4(numerator, denominator, &rem);
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// return {quot, rem};
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// }
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#if defined(__MINGW32__)
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#define __aeabi_idivmod __rt_sdiv
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#endif
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.syntax unified
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.text
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DEFINE_CODE_STATE
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.p2align 2
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DEFINE_COMPILERRT_FUNCTION(__aeabi_idivmod)
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#if defined(USE_THUMB_1)
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push {r0, r1, lr}
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bl SYMBOL_NAME(__divsi3)
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pop {r1, r2, r3} // now r0 = quot, r1 = num, r2 = denom
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muls r2, r0, r2 // r2 = quot * denom
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subs r1, r1, r2
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JMP (r3)
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#else // defined(USE_THUMB_1)
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PACBTI_LANDING
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#if defined(__ARM_FEATURE_PAC_DEFAULT)
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push { r12, lr }
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#else
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push { lr }
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#endif
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sub sp, sp, #4
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mov r2, sp
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#if defined(__MINGW32__)
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mov r3, r0
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mov r0, r1
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mov r1, r3
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#endif
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bl SYMBOL_NAME(__divmodsi4)
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ldr r1, [sp]
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add sp, sp, #4
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#if defined(__ARM_FEATURE_PAC_DEFAULT)
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pop { r12, lr }
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PAC_RETURN
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#else
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pop { pc }
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#endif
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#endif // defined(USE_THUMB_1)
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END_COMPILERRT_FUNCTION(__aeabi_idivmod)
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NO_EXEC_STACK_DIRECTIVE
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