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ARM: entry: abort-macro: simplify do_ldrd_abort

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We can test bits 27:25 and 20 of the instruction at the same time;
there's no need to separate out the check of bit 20.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
This commit is contained in:
Russell King 2011-06-26 13:51:44 +01:00
parent be020f8618
commit 198a0a927a
1 changed files with 1 additions and 3 deletions
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4
arch/arm/mm/abort-macro.S
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@ -30,12 +30,10 @@ not_thumb:
* [20] == 0
*/
.macro do_ldrd_abort, tmp, insn
tst \insn, #0x0e000000 @ [27:25] == 0
tst \insn, #0x0e100000 @ [27:25,20] == 0
bne not_ldrd
and \tmp, \insn, #0x000000f0 @ [7:4] == 1101
cmp \tmp, #0x000000d0
bne not_ldrd
tst \insn, #1 << 20 @ [20] == 0
moveq pc, lr
not_ldrd:
.endm