87 lines
2.2 KiB
ArmAsm
87 lines
2.2 KiB
ArmAsm
/*
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* GRUB -- GRand Unified Bootloader
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* Copyright (C) 2013 Free Software Foundation, Inc.
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*
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* GRUB is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* GRUB is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with GRUB. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include <grub/symbol.h>
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#include <grub/dl.h>
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.file "misc.S"
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.text
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.syntax unified
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#if !defined (__thumb2__)
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.arm
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#else
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.thumb
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#endif
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.align 2
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FUNCTION(__muldi3)
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FUNCTION(__aeabi_lmul)
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stmfd sp!, {r4, fp}
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add fp, sp, #4
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sub sp, sp, #16
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str r0, [fp, #-12]
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str r1, [fp, #-8]
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str r2, [fp, #-20]
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str r3, [fp, #-16]
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ldr r3, [fp, #-8]
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ldr r2, [fp, #-20]
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mul r2, r3, r2
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ldr r3, [fp, #-16]
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ldr r1, [fp, #-12]
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mul r3, r1, r3
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add r2, r2, r3
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ldr r0, [fp, #-12]
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ldr r1, [fp, #-20]
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umull r3, r4, r0, r1
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add r2, r2, r4
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mov r4, r2
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mov r0, r3
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mov r1, r4
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mov sp, fp
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sub sp, sp, #4
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ldmfd sp!, {r4, fp}
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bx lr
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.macro division32 parent
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sub sp, sp, #8 @ Allocate naturally aligned 64-bit space
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stmfd sp!, {r3,lr} @ Dummy r3 to maintain stack alignment
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add r2, sp, #8 @ Set r2 to address of 64-bit space
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bl \parent
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ldr r1, [sp, #8] @ Extract remainder
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ldmfd sp!, {r3,lr} @ Pop into an unused arg/scratch register
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add sp, sp, #8
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bx lr
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.endm
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FUNCTION(__aeabi_uidivmod)
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division32 grub_divmod32
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FUNCTION(__aeabi_idivmod)
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division32 grub_divmod32s
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/*
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* Null divide-by-zero handler
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*/
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FUNCTION(__aeabi_unwind_cpp_pr0)
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FUNCTION(raise)
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mov r0, #0
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bx lr
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END
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