#define NIR_SEARCH_MAX_VARIABLES 16
+struct nir_builder;
+
typedef enum {
nir_search_value_expression,
nir_search_value_variable,
typedef struct {
nir_search_value_type type;
+
+ /**
+ * Bit size of the value. It is interpreted as follows:
+ *
+ * For a search expression:
+ * - If bit_size > 0, then the value only matches an SSA value with the
+ * given bit size.
+ * - If bit_size <= 0, then the value matches any size SSA value.
+ *
+ * For a replace expression:
+ * - If bit_size > 0, then the value is constructed with the given bit size.
+ * - If bit_size == 0, then the value is constructed with the same bit size
+ * as the search value.
+ * - If bit_size < 0, then the value is constructed with the same bit size
+ * as variable (-bit_size - 1).
+ */
+ int bit_size;
} nir_search_value;
typedef struct {
/** Indicates that the given variable must be a constant
*
- * This is only alloed in search expressions and indicates that the
+ * This is only allowed in search expressions and indicates that the
* given variable is only allowed to match constant values.
*/
bool is_constant;
* never match anything.
*/
nir_alu_type type;
+
+ /** Optional condition fxn ptr
+ *
+ * This is only allowed in search expressions, and allows additional
+ * constraints to be placed on the match. Typically used for 'is_constant'
+ * variables to require, for example, power-of-two in order for the search
+ * to match.
+ */
+ bool (*cond)(nir_alu_instr *instr, unsigned src,
+ unsigned num_components, const uint8_t *swizzle);
} nir_search_variable;
typedef struct {
nir_search_value value;
+ nir_alu_type type;
+
union {
- uint32_t u;
- int32_t i;
- float f;
+ uint64_t u;
+ int64_t i;
+ double d;
} data;
} nir_search_constant;
+enum nir_search_op {
+ nir_search_op_i2f = nir_last_opcode + 1,
+ nir_search_op_u2f,
+ nir_search_op_f2f,
+ nir_search_op_f2u,
+ nir_search_op_f2i,
+ nir_search_op_u2u,
+ nir_search_op_i2i,
+ nir_search_op_b2f,
+ nir_search_op_b2i,
+ nir_search_op_i2b,
+ nir_search_op_f2b,
+};
+
typedef struct {
nir_search_value value;
- nir_op opcode;
+ /* When set on a search expression, the expression will only match an SSA
+ * value that does *not* have the exact bit set. If unset, the exact bit
+ * on the SSA value is ignored.
+ */
+ bool inexact;
+
+ /* One of nir_op or nir_search_op */
+ uint16_t opcode;
const nir_search_value *srcs[4];
+
+ /** Optional condition fxn ptr
+ *
+ * This allows additional constraints on expression matching, it is
+ * typically used to match an expressions uses such as the number of times
+ * the expression is used, and whether its used by an if.
+ */
+ bool (*cond)(nir_alu_instr *instr);
} nir_search_expression;
NIR_DEFINE_CAST(nir_search_value_as_variable, nir_search_value,
- nir_search_variable, value)
+ nir_search_variable, value,
+ type, nir_search_value_variable)
NIR_DEFINE_CAST(nir_search_value_as_constant, nir_search_value,
- nir_search_constant, value)
+ nir_search_constant, value,
+ type, nir_search_value_constant)
NIR_DEFINE_CAST(nir_search_value_as_expression, nir_search_value,
- nir_search_expression, value)
+ nir_search_expression, value,
+ type, nir_search_value_expression)
-nir_alu_instr *
-nir_replace_instr(nir_alu_instr *instr, const nir_search_expression *search,
- const nir_search_value *replace, void *mem_ctx);
+nir_ssa_def *
+nir_replace_instr(struct nir_builder *b, nir_alu_instr *instr,
+ const nir_search_expression *search,
+ const nir_search_value *replace);
#endif /* _NIR_SEARCH_ */