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https://github.com/edk2-porting/linux-next.git
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d98b90ea22
Renames logical shift macros, 'push' and 'pull', defined in arch/arm/include/asm/assembler.h, into 'lspush' and 'lspull'. That eliminates name conflict between 'push' logical shift macro and 'push' instruction mnemonic. That allows assembler.h to be included in .S files that use 'push' instruction. Suggested-by: Will Deacon <will.deacon@arm.com> Signed-off-by: Victor Kamensky <victor.kamensky@linaro.org> Acked-by: Nicolas Pitre <nico@linaro.org> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
80 lines
1.5 KiB
ArmAsm
80 lines
1.5 KiB
ArmAsm
/*
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* linux/arch/arm/lib/io-readsl.S
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*
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* Copyright (C) 1995-2000 Russell King
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*/
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#include <linux/linkage.h>
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#include <asm/assembler.h>
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ENTRY(__raw_readsl)
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teq r2, #0 @ do we have to check for the zero len?
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moveq pc, lr
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ands ip, r1, #3
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bne 3f
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subs r2, r2, #4
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bmi 2f
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stmfd sp!, {r4, lr}
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1: ldr r3, [r0, #0]
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ldr r4, [r0, #0]
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ldr ip, [r0, #0]
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ldr lr, [r0, #0]
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subs r2, r2, #4
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stmia r1!, {r3, r4, ip, lr}
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bpl 1b
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ldmfd sp!, {r4, lr}
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2: movs r2, r2, lsl #31
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ldrcs r3, [r0, #0]
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ldrcs ip, [r0, #0]
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stmcsia r1!, {r3, ip}
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ldrne r3, [r0, #0]
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strne r3, [r1, #0]
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mov pc, lr
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3: ldr r3, [r0]
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cmp ip, #2
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mov ip, r3, get_byte_0
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strb ip, [r1], #1
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bgt 6f
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mov ip, r3, get_byte_1
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strb ip, [r1], #1
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beq 5f
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mov ip, r3, get_byte_2
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strb ip, [r1], #1
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4: subs r2, r2, #1
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mov ip, r3, lspull #24
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ldrne r3, [r0]
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orrne ip, ip, r3, lspush #8
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strne ip, [r1], #4
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bne 4b
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b 8f
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5: subs r2, r2, #1
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mov ip, r3, lspull #16
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ldrne r3, [r0]
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orrne ip, ip, r3, lspush #16
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strne ip, [r1], #4
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bne 5b
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b 7f
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6: subs r2, r2, #1
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mov ip, r3, lspull #8
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ldrne r3, [r0]
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orrne ip, ip, r3, lspush #24
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strne ip, [r1], #4
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bne 6b
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mov r3, ip, get_byte_2
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strb r3, [r1, #2]
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7: mov r3, ip, get_byte_1
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strb r3, [r1, #1]
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8: mov r3, ip, get_byte_0
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strb r3, [r1, #0]
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mov pc, lr
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ENDPROC(__raw_readsl)
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