typedef struct nir_builder {
struct exec_list *cf_node_list;
+ nir_instr *before_instr;
+ nir_instr *after_instr;
+
nir_shader *shader;
nir_function_impl *impl;
} nir_builder;
struct exec_list *cf_node_list)
{
build->cf_node_list = cf_node_list;
+ build->before_instr = NULL;
+ build->after_instr = NULL;
+}
+
+static inline void
+nir_builder_insert_before_instr(nir_builder *build, nir_instr *before_instr)
+{
+ build->cf_node_list = NULL;
+ build->before_instr = before_instr;
+ build->after_instr = NULL;
+}
+
+static inline void
+nir_builder_insert_after_instr(nir_builder *build, nir_instr *after_instr)
+{
+ build->cf_node_list = NULL;
+ build->before_instr = NULL;
+ build->after_instr = after_instr;
+}
+
+static inline void
+nir_builder_instr_insert(nir_builder *build, nir_instr *instr)
+{
+ if (build->cf_node_list) {
+ nir_instr_insert_after_cf_list(build->cf_node_list, instr);
+ } else if (build->before_instr) {
+ nir_instr_insert_before(build->before_instr, instr);
+ } else {
+ assert(build->after_instr);
+ nir_instr_insert_after(build->after_instr, instr);
+ build->after_instr = instr;
+ }
}
static inline nir_ssa_def *
load_const->value = value;
- nir_instr_insert_after_cf_list(build->cf_node_list, &load_const->instr);
+ nir_builder_instr_insert(build, &load_const->instr);
return &load_const->def;
}
nir_ssa_dest_init(&instr->instr, &instr->dest.dest, num_components, NULL);
instr->dest.write_mask = (1 << num_components) - 1;
- nir_instr_insert_after_cf_list(build->cf_node_list, &instr->instr);
+ nir_builder_instr_insert(build, &instr->instr);
return &instr->dest.dest.ssa;
}
#include "nir_builder_opcodes.h"
+/**
+ * Similar to nir_fmov, but takes a nir_alu_src instead of a nir_ssa_def.
+ */
+static inline nir_ssa_def *
+nir_fmov_alu(nir_builder *build, nir_alu_src src, unsigned num_components)
+{
+ nir_alu_instr *mov = nir_alu_instr_create(build->shader, nir_op_fmov);
+ nir_ssa_dest_init(&mov->instr, &mov->dest.dest, num_components, NULL);
+ mov->dest.write_mask = (1 << num_components) - 1;
+ mov->src[0] = src;
+ nir_builder_instr_insert(build, &mov->instr);
+
+ return &mov->dest.dest.ssa;
+}
+
+static inline nir_ssa_def *
+nir_imov_alu(nir_builder *build, nir_alu_src src, unsigned num_components)
+{
+ nir_alu_instr *mov = nir_alu_instr_create(build->shader, nir_op_imov);
+ nir_ssa_dest_init(&mov->instr, &mov->dest.dest, num_components, NULL);
+ mov->dest.write_mask = (1 << num_components) - 1;
+ mov->src[0] = src;
+ nir_builder_instr_insert(build, &mov->instr);
+
+ return &mov->dest.dest.ssa;
+}
+
+/**
+ * Construct an fmov or imov that reswizzles the source's components.
+ */
+static inline nir_ssa_def *
+nir_swizzle(nir_builder *build, nir_ssa_def *src, unsigned swiz[4],
+ unsigned num_components, bool use_fmov)
+{
+ nir_alu_src alu_src = { NIR_SRC_INIT };
+ alu_src.src = nir_src_for_ssa(src);
+ for (int i = 0; i < 4; i++)
+ alu_src.swizzle[i] = swiz[i];
+
+ return use_fmov ? nir_fmov_alu(build, alu_src, num_components) :
+ nir_imov_alu(build, alu_src, num_components);
+}
+
+/**
+ * Turns a nir_src into a nir_ssa_def * so it can be passed to
+ * nir_build_alu()-based builder calls.
+ */
+static inline nir_ssa_def *
+nir_ssa_for_src(nir_builder *build, nir_src src, int num_components)
+{
+ if (src.is_ssa && src.ssa->num_components == num_components)
+ return src.ssa;
+
+ nir_alu_src alu = { NIR_SRC_INIT };
+ alu.src = src;
+ for (int j = 0; j < 4; j++)
+ alu.swizzle[j] = j;
+
+ return nir_imov_alu(build, alu, num_components);
+}
+
#endif /* NIR_BUILDER_H */