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https://github.com/CloverHackyColor/CloverBootloader.git
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51 lines
1.1 KiB
ArmAsm
51 lines
1.1 KiB
ArmAsm
//------------------------------------------------------------------------------
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//
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// Copyright (c) 2008 - 2009, Apple Inc. All rights reserved.<BR>
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//
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// SPDX-License-Identifier: BSD-2-Clause-Patent
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//
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//------------------------------------------------------------------------------
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#include <AsmMacroIoLib.h>
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//
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// A pair of (unsigned) long longs is returned in {{r0, r1}, {r2, r3}},
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// the quotient in {r0, r1}, and the remainder in {r2, r3}.
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//
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//__value_in_regs lldiv_t
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//EFIAPI
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//__aeabi_ldivmod (
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// IN UINT64 Dividen
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// IN UINT64 Divisor
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// )//
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//
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ASM_FUNC(__aeabi_ldivmod)
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push {r4,lr}
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asrs r4,r1,#1
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eor r4,r4,r3,LSR #1
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bpl L_Test1
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rsbs r0,r0,#0
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rsc r1,r1,#0
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L_Test1:
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tst r3,r3
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bpl L_Test2
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rsbs r2,r2,#0
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rsc r3,r3,#0
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L_Test2:
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bl ASM_PFX(__aeabi_uldivmod)
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tst r4,#0x40000000
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beq L_Test3
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rsbs r0,r0,#0
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rsc r1,r1,#0
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L_Test3:
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tst r4,#0x80000000
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beq L_Exit
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rsbs r2,r2,#0
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rsc r3,r3,#0
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L_Exit:
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pop {r4,pc}
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