diff options
Diffstat (limited to 'arch/avr32/lib/findbit.S')
| -rw-r--r-- | arch/avr32/lib/findbit.S | 33 |
1 files changed, 32 insertions, 1 deletions
diff --git a/arch/avr32/lib/findbit.S b/arch/avr32/lib/findbit.S index 2b4856f4bf7..b93586460be 100644 --- a/arch/avr32/lib/findbit.S +++ b/arch/avr32/lib/findbit.S @@ -123,7 +123,7 @@ ENTRY(find_next_bit) brgt 1b retal r11 -ENTRY(generic_find_next_zero_le_bit) +ENTRY(find_next_bit_le) lsr r8, r10, 5 sub r9, r11, r10 retle r11 @@ -152,3 +152,34 @@ ENTRY(generic_find_next_zero_le_bit) sub r9, 32 brgt 1b retal r11 + +ENTRY(find_next_zero_bit_le) + lsr r8, r10, 5 + sub r9, r11, r10 + retle r11 + + lsl r8, 2 + add r12, r8 + andl r10, 31, COH + breq 1f + + /* offset is not word-aligned. Handle the first (32 - r10) bits */ + ldswp.w r8, r12[0] + sub r12, -4 + com r8 + lsr r8, r8, r10 + brne .L_found + + /* r9 = r9 - (32 - r10) = r9 + r10 - 32 */ + add r9, r10 + sub r9, 32 + retle r11 + + /* Main loop. offset must be word-aligned */ +1: ldswp.w r8, r12[0] + com r8 + brne .L_found + sub r12, -4 + sub r9, 32 + brgt 1b + retal r11 |