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ArmPkg/CompilerIntrinsicsLib: Reverse the order of the 'ldrb' instructions in __aeabi_uread4

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Change __aeabi_uread4 from:
    ldrb    r2, [r0, #1]
    ldrb    r1, [r0]
    (...)
to:
    ldrb    r1, [r0]
    ldrb    r2, [r0, #1]
    (...)

This change is a workaround to handle correctly __aeabi_uread4 on ARM
Versatile Express RTSM.
It should not have any major consequence on the other ARM platforms.



git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@12481 6f19259b-4bc3-4df7-8a09-765794883524
This commit is contained in:
oliviermartin
2011-09-29 20:55:10 +00:00
parent fa16d12dcc
commit 68085d37f8
1 changed files with 38 additions and 38 deletions
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2
ArmPkg/Library/CompilerIntrinsicsLib/Arm/uread.asm
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@@ -26,8 +26,8 @@
; ); ; );
; ;
__aeabi_uread4 __aeabi_uread4
ldrb r2, [r0, #1]
ldrb r1, [r0] ldrb r1, [r0]
ldrb r2, [r0, #1]
ldrb r3, [r0, #2] ldrb r3, [r0, #2]
ldrb r0, [r0, #3] ldrb r0, [r0, #3]
orr r1, r1, r2, lsl #8 orr r1, r1, r2, lsl #8