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author | Maurus Cuelenaere <mcuelenaere@gmail.com> | 2009-02-05 21:36:11 +0000 |
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committer | Maurus Cuelenaere <mcuelenaere@gmail.com> | 2009-02-05 21:36:11 +0000 |
commit | e1aee318782d89e017e1241847706b21ea014974 (patch) | |
tree | 3ac116f5d3b44e68a33df10ec0f1a71bdd9f9ccf | |
parent | e3927102ba1d68b4b7cc37511df85238a62e8f0e (diff) | |
download | rockbox-e1aee318782d89e017e1241847706b21ea014974.tar.gz rockbox-e1aee318782d89e017e1241847706b21ea014974.zip |
Fix MIPS ffs implementation
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@19930 a1c6a512-1295-4272-9138-f99709370657
-rw-r--r-- | firmware/target/mips/ffs-mips.S | 12 |
1 files changed, 4 insertions, 8 deletions
diff --git a/firmware/target/mips/ffs-mips.S b/firmware/target/mips/ffs-mips.S index 4f798720a5..f1547778d4 100644 --- a/firmware/target/mips/ffs-mips.S +++ b/firmware/target/mips/ffs-mips.S @@ -40,15 +40,11 @@ .type find_first_set_bit, %function find_first_set_bit: - beqz a0, no_bits_set # If val == 0 branch to no_bits_set + negu t0, a0 # t0 = a0 & -a0 + and t0, t0, a0 # - clz v0, a0 # Get lead 0's count + clz v0, t0 # Get lead 0's count li t0, 31 # t0 = 31 sub v0, t0, v0 # Return value = t0 - v0 - jr ra # Return - nop - -no_bits_set: - li v0, 32 # Return value = 32 - jr ra # Return + jr ra nop |