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nir: Don't optimize to 64 bit fsub if the driver doesn't support it

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Fixes: a4840e15ab
  r600: Use nir-to-tgsi instead of TGSI when the NIR debug opt is disabled.

Signed-off-by: Gert Wollny <gert.wollny@collabora.com>
Reviewed-by: Emma Anholt <emma@anholt.net>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/16130>
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Gert Wollny 2022-04-24 14:25:01 +02:00 • committed by Marge Bot
parent 1598d18a88
commit 47d3f7c69f
1 changed files with 5 additions and 1 deletions
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6
src/compiler/nir/nir_opt_algebraic.py
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@ -2556,7 +2556,11 @@ late_optimizations = [
(('~fadd@32', ('fmulz', a, b), c), ('ffmaz', a, b, c), 'options->fuse_ffma32'),
# Subtractions get lowered during optimization, so we need to recombine them
(('fadd', a, ('fneg', 'b')), ('fsub', 'a', 'b'), 'options->has_fsub'),
(('fadd@8', a, ('fneg', 'b')), ('fsub', 'a', 'b'), 'options->has_fsub'),
(('fadd@16', a, ('fneg', 'b')), ('fsub', 'a', 'b'), 'options->has_fsub'),
(('fadd@32', a, ('fneg', 'b')), ('fsub', 'a', 'b'), 'options->has_fsub'),
(('fadd@64', a, ('fneg', 'b')), ('fsub', 'a', 'b'), 'options->has_fsub && !(options->lower_doubles_options & nir_lower_dsub)'),
(('fneg', a), ('fmul', a, -1.0), 'options->lower_fneg'),
(('iadd', a, ('ineg', 'b')), ('isub', 'a', 'b'), 'options->has_isub || options->lower_ineg'),
(('ineg', a), ('isub', 0, a), 'options->lower_ineg'),