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nir/lower_wpos_ytransform: clean up sample_pos

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Reviewed-by: Alyssa Rosenzweig <alyssa@rosenzweig.io>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/31951>
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Georg Lehmann 2024-11-04 11:06:07 +01:00 • committed by Marge Bot
parent 807b267c4d
commit b5d6b31cc5
1 changed files with 3 additions and 4 deletions
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7
src/compiler/nir/nir_lower_wpos_ytransform.c
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@ -278,10 +278,9 @@ lower_load_sample_pos(lower_wpos_ytransform_state *state,
nir_def *scale = nir_channel(b, wpostrans, 0);
nir_def *neg_scale = nir_channel(b, wpostrans, 2);
/* Either y or 1-y for scale equal to 1 or -1 respectively. */
nir_def *flipped_y =
nir_fadd(b, nir_fmax(b, neg_scale, nir_imm_float(b, 0.0)),
nir_fmul(b, nir_channel(b, pos, 1), scale));
nir_def *flipped_pos = nir_vec2(b, nir_channel(b, pos, 0), flipped_y);
nir_def *flipped_y = nir_ffma(b, nir_channel(b, pos, 1), scale,
nir_fmax(b, neg_scale, nir_imm_float(b, 0.0)));
nir_def *flipped_pos = nir_vector_insert_imm(b, pos, flipped_y, 1);
nir_def_rewrite_uses_after(&intr->def, flipped_pos,
flipped_pos->parent_instr);