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arm: lib: Sync libgcc shift operations

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Sync the libgcc shift operations with Linux kernel 4.4.6 , commit
0d1912303e54ed1b2a371be0bba51c384dd57326 . Syncing these three
files is easy, as there is almost no change in them, except the
addition of Thumb support.

This patch also defines CONFIG_THUMB2_KERNEL and CONFIG_ARM_ASM_UNIFIED
which is necessary for correct build of these files both in ARM and
Thumb mode, just like Linux does.

Signed-off-by: Marek Vasut <marex@denx.de>
Cc: Albert Aribaud <albert.u.boot@aribaud.net>
Cc: Masahiro Yamada <yamada.masahiro@socionext.com>
Cc: Simon Glass <sjg@chromium.org>
Cc: Tom Rini <trini@konsulko.com>
Reviewed-by: Tom Rini <trini@konsulko.com>
This commit is contained in:
Marek Vasut 2016-05-26 18:01:39 +02:00 committed by Tom Rini
parent 11b1a9b2c0
commit 06b36cb775
3 changed files with 24 additions and 12 deletions
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12
arch/arm/lib/ashldi3.S
View file

@ -5,6 +5,7 @@
*/
#include <linux/linkage.h>
#include <asm/assembler.h>
#ifdef __ARMEB__
#define al r1
@ -14,15 +15,18 @@
#define ah r1
#endif
.globl __ashldi3
__ashldi3:
ENTRY(__ashldi3)
ENTRY(__aeabi_llsl)
subs r3, r2, #32
rsb ip, r2, #32
movmi ah, ah, lsl r2
movpl ah, al, lsl r3
orrmi ah, ah, al, lsr ip
ARM( orrmi ah, ah, al, lsr ip )
THUMB( lsrmi r3, al, ip )
THUMB( orrmi ah, ah, r3 )
mov al, al, lsl r2
mov pc, lr
ret lr
ENDPROC(__ashldi3)
ENDPROC(__aeabi_llsl)

12
arch/arm/lib/ashrdi3.S
View file

@ -5,6 +5,7 @@
*/
#include <linux/linkage.h>
#include <asm/assembler.h>
#ifdef __ARMEB__
#define al r1
@ -14,15 +15,18 @@
#define ah r1
#endif
.globl __ashrdi3
__ashrdi3:
ENTRY(__ashrdi3)
ENTRY(__aeabi_lasr)
subs r3, r2, #32
rsb ip, r2, #32
movmi al, al, lsr r2
movpl al, ah, asr r3
orrmi al, al, ah, lsl ip
ARM( orrmi al, al, ah, lsl ip )
THUMB( lslmi r3, ah, ip )
THUMB( orrmi al, al, r3 )
mov ah, ah, asr r2
mov pc, lr
ret lr
ENDPROC(__ashrdi3)
ENDPROC(__aeabi_lasr)

12
arch/arm/lib/lshrdi3.S
View file

@ -5,6 +5,7 @@
*/
#include <linux/linkage.h>
#include <asm/assembler.h>
#ifdef __ARMEB__
#define al r1
@ -14,15 +15,18 @@
#define ah r1
#endif
.globl __lshrdi3
__lshrdi3:
ENTRY(__lshrdi3)
ENTRY(__aeabi_llsr)
subs r3, r2, #32
rsb ip, r2, #32
movmi al, al, lsr r2
movpl al, ah, lsr r3
orrmi al, al, ah, lsl ip
ARM( orrmi al, al, ah, lsl ip )
THUMB( lslmi r3, ah, ip )
THUMB( orrmi al, al, r3 )
mov ah, ah, lsr r2
mov pc, lr
ret lr
ENDPROC(__lshrdi3)
ENDPROC(__aeabi_llsr)