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yaml --- r: 258 b: refs/heads/master c: 7a55fd0 h: refs/heads/master v: v3
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Russell King
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Apr 18, 2005
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Original file line number | Diff line number | Diff line change |
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--- | ||
refs/heads/master: 0ba4da03cc84f54b2574e1abcdaa18ef8456a9fb | ||
refs/heads/master: 7a55fd0bb31eb369149b89fdf9e0c7bc73486ee1 |
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Original file line number | Diff line number | Diff line change |
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.macro bitop, instr | ||
and r2, r0, #7 | ||
mov r3, #1 | ||
mov r3, r3, lsl r2 | ||
save_and_disable_irqs ip, r2 | ||
ldrb r2, [r1, r0, lsr #3] | ||
\instr r2, r2, r3 | ||
strb r2, [r1, r0, lsr #3] | ||
restore_irqs ip | ||
mov pc, lr | ||
.endm | ||
|
||
/** | ||
* testop - implement a test_and_xxx_bit operation. | ||
* @instr: operational instruction | ||
* @store: store instruction | ||
* | ||
* Note: we can trivially conditionalise the store instruction | ||
* to avoid dirting the data cache. | ||
*/ | ||
.macro testop, instr, store | ||
add r1, r1, r0, lsr #3 | ||
and r3, r0, #7 | ||
mov r0, #1 | ||
save_and_disable_irqs ip, r2 | ||
ldrb r2, [r1] | ||
tst r2, r0, lsl r3 | ||
\instr r2, r2, r0, lsl r3 | ||
\store r2, [r1] | ||
restore_irqs ip | ||
moveq r0, #0 | ||
mov pc, lr | ||
.endm |
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