ARM Assembler question.
Posted: Aug 25, 2005 @ 7:39pm
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ARM Assembler question.
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Posted: Aug 25, 2005 @ 7:39pmPosted: Aug 25, 2005 @ 8:24pmPosted: Aug 25, 2005 @ 11:13pmPosted: Aug 26, 2005 @ 1:30pmPosted: Aug 26, 2005 @ 2:17pmPosted: Aug 26, 2005 @ 2:20pmPosted: Aug 26, 2005 @ 5:10pmOk, I found the problem. My assembly code calling function has been changed with some crappy code yesterday. I thought it was fine but it was causing all this mess all along.
Posted: Aug 27, 2005 @ 12:52amPosted: Aug 27, 2005 @ 6:47amrotate_imm = top four bits * 2
immediate = bottom_8_bits rotated right by rotate_imm
If you read the assembler source, it'll put things like:
<pre>
mov r12, #1, 20
</pre>
.. which is r12=1 ROR 20.
It's covered in the <a href="http://www.altera.com/literature/third-party/ddi0100e_arm_arm.pdf">ARM ARM</a> (ARM Architecture Reference Manual), page 222 (A5-6).
immediate = bottom_8_bits rotated right by rotate_imm
If you read the assembler source, it'll put things like:
<pre>
mov r12, #1, 20
</pre>
.. which is r12=1 ROR 20.
It's covered in the <a href="http://www.altera.com/literature/third-party/ddi0100e_arm_arm.pdf">ARM ARM</a> (ARM Architecture Reference Manual), page 222 (A5-6).
Posted: Aug 27, 2005 @ 1:45pmPosted: Aug 27, 2005 @ 4:56pmPosted: Aug 27, 2005 @ 6:37pmPosted: Aug 27, 2005 @ 8:42pmPosted: Aug 28, 2005 @ 12:55amPosted: Aug 28, 2005 @ 1:40am