diff options
Diffstat (limited to 'firmware/target/mips/ffs-mips.S')
| -rw-r--r-- | firmware/target/mips/ffs-mips.S | 17 |
1 files changed, 10 insertions, 7 deletions
diff --git a/firmware/target/mips/ffs-mips.S b/firmware/target/mips/ffs-mips.S index f1547778d4..92f4e31729 100644 --- a/firmware/target/mips/ffs-mips.S +++ b/firmware/target/mips/ffs-mips.S | |||
| @@ -40,11 +40,14 @@ | |||
| 40 | .type find_first_set_bit, %function | 40 | .type find_first_set_bit, %function |
| 41 | 41 | ||
| 42 | find_first_set_bit: | 42 | find_first_set_bit: |
| 43 | negu t0, a0 # t0 = a0 & -a0 | 43 | beqz a0, 0 # if(a0 == 0) goto 1 |
| 44 | and t0, t0, a0 # | 44 | li v0, 32 # v0 = 32 |
| 45 | 45 | negu t0, a0 # t0 = -a0 | |
| 46 | clz v0, t0 # Get lead 0's count | 46 | and t0, t0, a0 # t0 = a0 & t0 |
| 47 | clz v0, t0 # Get lead 0's count (v0=32 if all 0's) | ||
| 47 | li t0, 31 # t0 = 31 | 48 | li t0, 31 # t0 = 31 |
| 48 | sub v0, t0, v0 # Return value = t0 - v0 | 49 | jr ra # |
| 49 | jr ra | 50 | sub v0, t0, v0 # v0 = t0 - v0 |
| 50 | nop | 51 | 1: |
| 52 | jr ra # | ||
| 53 | nop # | ||