Like
90a8fb03556e.
fossil-db results:
All Skylake and newer Intel platforms had similar results. (Ice Lake shown)
Instructions in all programs:
141442369 ->
141442363 (-0.0%)
Instructions helped: 1
Cycles in all programs:
9099270231 ->
9099270187 (-0.0%)
Cycles helped: 1
Reviewed-by: Emma Anholt <emma@anholt.net>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/17637>
/* array_length = max(buffer_size - offset, 0) / stride */
nir_ssa_def *array_length =
- nir_idiv(&b->nb,
- nir_imax(&b->nb,
- nir_isub(&b->nb,
- buf_size,
- nir_imm_int(&b->nb, offset)),
- nir_imm_int(&b->nb, 0u)),
- nir_imm_int(&b->nb, stride));
+ nir_udiv_imm(&b->nb,
+ nir_usub_sat(&b->nb,
+ buf_size,
+ nir_imm_int(&b->nb, offset)),
+ stride);
vtn_push_nir_ssa(b, w[2], array_length);
}