[U-Boot] [PATCH 04/12] arm: lib: Sync libgcc shift operations

Marek Vasut
2016-05-26T16:01:39Z

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>
---
arch/arm/lib/ashldi3.S | 12 ++++++++----
arch/arm/lib/ashrdi3.S | 12 ++++++++----
arch/arm/lib/lshrdi3.S | 12 ++++++++----
3 files changed, 24 insertions(+), 12 deletions(-)

diff --git a/arch/arm/lib/ashldi3.S b/arch/arm/lib/ashldi3.S
index 9c34c21..a4f5ebb 100644
--- a/arch/arm/lib/ashldi3.S
+++ b/arch/arm/lib/ashldi3.S
@@ -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)
diff --git a/arch/arm/lib/ashrdi3.S b/arch/arm/lib/ashrdi3.S
index c74fd64..c6e1ed3 100644
--- a/arch/arm/lib/ashrdi3.S
+++ b/arch/arm/lib/ashrdi3.S
@@ -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)
diff --git a/arch/arm/lib/lshrdi3.S b/arch/arm/lib/lshrdi3.S
index 1f9b916..9c51141 100644
--- a/arch/arm/lib/lshrdi3.S
+++ b/arch/arm/lib/lshrdi3.S
@@ -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)
--
2.7.0