arm: lib: Sync libgcc shift operations

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>

diff --git a/arch/arm/lib/ashldi3.S b/arch/arm/lib/ashldi3.S
index 9c34c21..a4f5ebb 100644 (file)
--- 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 (file)
--- 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 (file)
--- 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)