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2d286ec80a
While we're at it, rename pan_lower_* to pan_nir_lower_* for consistency with everything else. The intention is that eventually this will be a private header and drivers will stop calling these passes themselves. However, that is a long way off so for now we'll just move them to the sensibly named place. Notably, pan_preprocess/optimize/postprocess_nir stay in pan_compiler.h because those are intended to be external APIs indefinitely. Acked-by: Erik Faye-Lund <erik.faye-lund@collabora.com> Acked-by: Boris Brezillon <boris.brezillon@collabora.com> Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/38753>
49 lines
1.9 KiB
C
49 lines
1.9 KiB
C
/*
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* Copyright (C) 2021 Collabora, Ltd.
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice (including the next
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* paragraph) shall be included in all copies or substantial portions of the
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* Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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* SOFTWARE.
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*/
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#include "compiler/nir/nir_builder.h"
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#include "pan_nir.h"
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/* Lower gl_HelperInvocation to (gl_SampleMaskIn == 0), this depends on
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* architectural details but is more efficient than NIR's lowering.
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*/
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static bool
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pan_lower_helper_invocation_instr(nir_builder *b, nir_intrinsic_instr *intr,
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void *data)
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{
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if (intr->intrinsic != nir_intrinsic_load_helper_invocation)
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return false;
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b->cursor = nir_before_instr(&intr->instr);
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nir_def *mask = nir_load_sample_mask_in(b);
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nir_def_replace(&intr->def, nir_ieq_imm(b, mask, 0));
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return true;
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}
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bool
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pan_nir_lower_helper_invocation(nir_shader *shader)
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{
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return nir_shader_intrinsics_pass(shader, pan_lower_helper_invocation_instr,
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nir_metadata_control_flow, NULL);
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}
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