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7a3bcadf4e
This makes calling nir_foo_as_bar a bit safer because we're no longer 100% trusting in the caller to ensure that it's safe. The caller still needs to do the right thing but this ensures that we catch invalid casts with an assert rather than by reading garbage data. The one downside is that we do use the casts a bit in nir_validate and it's not a validate_assert. Signed-off-by: Jason Ekstrand <jason@jlekstrand.net> Reviewed-by: Connor Abbott <cwabbott0@gmail.com>
122 lines
3.9 KiB
C
122 lines
3.9 KiB
C
/*
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* Copyright © 2014 Intel Corporation
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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
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* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
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* IN THE SOFTWARE.
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*
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* Authors:
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* Jason Ekstrand (jason@jlekstrand.net)
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*
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*/
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#ifndef _NIR_SEARCH_
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#define _NIR_SEARCH_
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#include "nir.h"
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#define NIR_SEARCH_MAX_VARIABLES 16
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typedef enum {
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nir_search_value_expression,
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nir_search_value_variable,
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nir_search_value_constant,
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} nir_search_value_type;
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typedef struct {
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nir_search_value_type type;
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unsigned bit_size;
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} nir_search_value;
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typedef struct {
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nir_search_value value;
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/** The variable index; Must be less than NIR_SEARCH_MAX_VARIABLES */
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unsigned variable;
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/** Indicates that the given variable must be a constant
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*
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* This is only allowed in search expressions and indicates that the
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* given variable is only allowed to match constant values.
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*/
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bool is_constant;
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/** Indicates that the given variable must have a certain type
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*
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* This is only allowed in search expressions and indicates that the
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* given variable is only allowed to match values that come from an ALU
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* instruction with the given output type. A type of nir_type_void
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* means it can match any type.
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*
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* Note: A variable that is both constant and has a non-void type will
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* never match anything.
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*/
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nir_alu_type type;
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/** Optional condition fxn ptr
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*
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* This is only allowed in search expressions, and allows additional
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* constraints to be placed on the match. Typically used for 'is_constant'
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* variables to require, for example, power-of-two in order for the search
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* to match.
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*/
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bool (*cond)(nir_alu_instr *instr, unsigned src,
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unsigned num_components, const uint8_t *swizzle);
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} nir_search_variable;
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typedef struct {
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nir_search_value value;
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nir_alu_type type;
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union {
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uint64_t u;
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int64_t i;
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double d;
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} data;
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} nir_search_constant;
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typedef struct {
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nir_search_value value;
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/* When set on a search expression, the expression will only match an SSA
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* value that does *not* have the exact bit set. If unset, the exact bit
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* on the SSA value is ignored.
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*/
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bool inexact;
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nir_op opcode;
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const nir_search_value *srcs[4];
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} nir_search_expression;
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NIR_DEFINE_CAST(nir_search_value_as_variable, nir_search_value,
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nir_search_variable, value,
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type, nir_search_value_variable)
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NIR_DEFINE_CAST(nir_search_value_as_constant, nir_search_value,
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nir_search_constant, value,
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type, nir_search_value_constant)
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NIR_DEFINE_CAST(nir_search_value_as_expression, nir_search_value,
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nir_search_expression, value,
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type, nir_search_value_expression)
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nir_alu_instr *
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nir_replace_instr(nir_alu_instr *instr, const nir_search_expression *search,
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const nir_search_value *replace, void *mem_ctx);
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#endif /* _NIR_SEARCH_ */
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