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83d290c56f
When U-Boot started using SPDX tags we were among the early adopters and there weren't a lot of other examples to borrow from. So we picked the area of the file that usually had a full license text and replaced it with an appropriate SPDX-License-Identifier: entry. Since then, the Linux Kernel has adopted SPDX tags and they place it as the very first line in a file (except where shebangs are used, then it's second line) and with slightly different comment styles than us. In part due to community overlap, in part due to better tag visibility and in part for other minor reasons, switch over to that style. This commit changes all instances where we have a single declared license in the tag as both the before and after are identical in tag contents. There's also a few places where I found we did not have a tag and have introduced one. Signed-off-by: Tom Rini <trini@konsulko.com>
42 lines
1.1 KiB
ArmAsm
42 lines
1.1 KiB
ArmAsm
/* SPDX-License-Identifier: GPL-2.0+ */
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/*
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* This code was copied from arch/powerpc/kernel/misc_32.S in the Linux
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* kernel sources (commit 85e2efbb1db9a18d218006706d6e4fbeb0216213, also
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* known as 2.6.38-rc5). The source file copyrights are as follows:
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*
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* (C) Copyright 1995-1996 Gary Thomas (gdt@linuxppc.org)
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*
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* Largely rewritten by Cort Dougan (cort@cs.nmt.edu)
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* and Paul Mackerras.
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*/
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#include <ppc_asm.tmpl>
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#include <ppc_defs.h>
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#include <config.h>
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/*
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* Extended precision shifts.
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*
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* Updated to be valid for shift counts from 0 to 63 inclusive.
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* -- Gabriel
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*
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* R3/R4 has 64 bit value
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* R5 has shift count
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* result in R3/R4
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*
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* ashrdi3: arithmetic right shift (sign propagation)
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* lshrdi3: logical right shift
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* ashldi3: left shift
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*/
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.globl __ashldi3
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__ashldi3:
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subfic r6,r5,32
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slw r3,r3,r5 # MSW = count > 31 ? 0 : MSW << count
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addi r7,r5,32 # could be xori, or addi with -32
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srw r6,r4,r6 # t1 = count > 31 ? 0 : LSW >> (32-count)
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slw r7,r4,r7 # t2 = count < 32 ? 0 : LSW << (count-32)
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or r3,r3,r6 # MSW |= t1
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slw r4,r4,r5 # LSW = LSW << count
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or r3,r3,r7 # MSW |= t2
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blr
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