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| author | Jonathan Marek <jonathan@marek.ca> | 2019-05-31 13:54:12 -0400 |
|---|---|---|
| committer | Jonathan Marek <jonathan@marek.ca> | 2019-05-31 21:35:26 +0000 |
| commit | f889180ee101c2fecd573dd364d91883ccdd30df (patch) | |
| tree | 4b88aee012ea2b289546226cd764ae1f01e1faf5 /src/compiler/nir/nir_opt_algebraic.py | |
| parent | 887c2a60923debf0facc4d95554ed87555d83620 (diff) | |
| download | mesa-f889180ee101c2fecd573dd364d91883ccdd30df.tar.gz | |
nir: add lower_bitshift option
Add a "lower_bitshift" option, which disables optimizations introducing
bitshifts and lowers ishl by constant to a multiply, so that we don't have
to deal with bitshifts in int_to_float lowering.
Signed-off-by: Jonathan Marek <jonathan@marek.ca>
Reviewed-by: Jason Ekstrand <jason@jlekstrand.net>
Diffstat (limited to 'src/compiler/nir/nir_opt_algebraic.py')
| -rw-r--r-- | src/compiler/nir/nir_opt_algebraic.py | 8 |
1 files changed, 5 insertions, 3 deletions
diff --git a/src/compiler/nir/nir_opt_algebraic.py b/src/compiler/nir/nir_opt_algebraic.py index 89d07aa1261..594f521a66b 100644 --- a/src/compiler/nir/nir_opt_algebraic.py +++ b/src/compiler/nir/nir_opt_algebraic.py @@ -69,8 +69,10 @@ e = 'e' optimizations = [ - (('imul', a, '#b@32(is_pos_power_of_two)'), ('ishl', a, ('find_lsb', b))), - (('imul', a, '#b@32(is_neg_power_of_two)'), ('ineg', ('ishl', a, ('find_lsb', ('iabs', b))))), + (('imul', a, '#b@32(is_pos_power_of_two)'), ('ishl', a, ('find_lsb', b)), '!options->lower_bitshift'), + (('imul', a, '#b@32(is_neg_power_of_two)'), ('ineg', ('ishl', a, ('find_lsb', ('iabs', b)))), '!options->lower_bitshift'), + (('ishl', a, '#b@32'), ('imul', a, ('ishl', 1, b)), 'options->lower_bitshift'), + (('unpack_64_2x32_split_x', ('imul_2x32_64(is_used_once)', a, b)), ('imul', a, b)), (('unpack_64_2x32_split_x', ('umul_2x32_64(is_used_once)', a, b)), ('imul', a, b)), (('imul_2x32_64', a, b), ('pack_64_2x32_split', ('imul', a, b), ('imul_high', a, b)), 'options->lower_mul_2x32_64'), @@ -79,7 +81,7 @@ optimizations = [ (('idiv', a, 1), a), (('umod', a, 1), 0), (('imod', a, 1), 0), - (('udiv', a, '#b@32(is_pos_power_of_two)'), ('ushr', a, ('find_lsb', b))), + (('udiv', a, '#b@32(is_pos_power_of_two)'), ('ushr', a, ('find_lsb', b)), '!options->lower_bitshift'), (('idiv', a, '#b@32(is_pos_power_of_two)'), ('imul', ('isign', a), ('ushr', ('iabs', a), ('find_lsb', b))), 'options->lower_idiv'), (('idiv', a, '#b@32(is_neg_power_of_two)'), ('ineg', ('imul', ('isign', a), ('ushr', ('iabs', a), ('find_lsb', ('iabs', b))))), 'options->lower_idiv'), (('umod', a, '#b(is_pos_power_of_two)'), ('iand', a, ('isub', b, 1))), |