diff options
| author | Jason Ekstrand <[email protected]> | 2017-08-28 15:05:11 -0700 |
|---|---|---|
| committer | Jason Ekstrand <[email protected]> | 2017-10-12 22:39:29 -0700 |
| commit | a0947921eb01f4c037de28b753fc10f86a25fc65 (patch) | |
| tree | 1e9f105754c5fd9d683393942eda458861cece29 | |
| parent | ac3b73ac8dcf501ab704b274d67acd065fbd4348 (diff) | |
nir/opcodes: Fix constant-folding of ufind_msb
We didn't fold correctly in the case of 0x1 because we never let the
loop counter hit 0. Switching it to bit >= 0 solves this problem.
Reviewed-by: Bas Nieuwenhuizen <[email protected]>
Reviewed-by: Connor Abbott <[email protected]>
Cc: [email protected]
| -rw-r--r-- | src/compiler/nir/nir_opcodes.py | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/src/compiler/nir/nir_opcodes.py b/src/compiler/nir/nir_opcodes.py index 06ae820c3e8..28a04672285 100644 --- a/src/compiler/nir/nir_opcodes.py +++ b/src/compiler/nir/nir_opcodes.py @@ -308,7 +308,7 @@ for (unsigned bit = 0; bit < 32; bit++) { unop_convert("ufind_msb", tint32, tuint32, """ dst = -1; -for (int bit = 31; bit > 0; bit--) { +for (int bit = 31; bit >= 0; bit--) { if ((src0 >> bit) & 1) { dst = bit; break; |