diff options
| -rw-r--r-- | src/compiler/nir/nir_opt_idiv_const.c | 8 |
1 files changed, 5 insertions, 3 deletions
diff --git a/src/compiler/nir/nir_opt_idiv_const.c b/src/compiler/nir/nir_opt_idiv_const.c index 8f70821ca2f..688186779e6 100644 --- a/src/compiler/nir/nir_opt_idiv_const.c +++ b/src/compiler/nir/nir_opt_idiv_const.c @@ -65,15 +65,17 @@ build_umod(nir_builder *b, nir_ssa_def *n, uint64_t d) static nir_ssa_def * build_idiv(nir_builder *b, nir_ssa_def *n, int64_t d) { + uint64_t abs_d = d < 0 ? -d : d; + if (d == 0) { return nir_imm_intN_t(b, 0, n->bit_size); } else if (d == 1) { return n; } else if (d == -1) { return nir_ineg(b, n); - } else if (util_is_power_of_two_or_zero64(d)) { - uint64_t abs_d = d < 0 ? -d : d; - nir_ssa_def *uq = nir_ishr(b, n, nir_imm_int(b, util_logbase2_64(abs_d))); + } else if (util_is_power_of_two_or_zero64(abs_d)) { + nir_ssa_def *uq = nir_ushr(b, nir_iabs(b, n), + nir_imm_int(b, util_logbase2_64(abs_d))); nir_ssa_def *n_neg = nir_ilt(b, n, nir_imm_intN_t(b, 0, n->bit_size)); nir_ssa_def *neg = d < 0 ? nir_inot(b, n_neg) : n_neg; return nir_bcsel(b, neg, nir_ineg(b, uq), uq); |