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nir/builder: Add nir_load_var() and nir_store_var() helpers. 

These provide a convenient way to do simple variable loads and stores.

Signed-off-by: Kenneth Graunke <kenneth@whitecape.org>
Reviewed-by: Jason Ekstrand <jason.ekstrand@intel.com>
This commit is contained in:
Kenneth Graunke 2015-05-12 01:53:24 -07:00
parent 4654439fdd
commit cb2b118e40
1 changed files with 27 additions and 0 deletions
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27
src/glsl/nir/nir_builder.h
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@ -234,4 +234,31 @@ nir_ssa_for_src(nir_builder *build, nir_src src, int num_components)
return nir_imov_alu(build, alu, num_components);
}
static inline nir_ssa_def *
nir_load_var(nir_builder *build, nir_variable *var)
{
const unsigned num_components = glsl_get_vector_elements(var->type);
nir_intrinsic_instr *load =
nir_intrinsic_instr_create(build->shader, nir_intrinsic_load_var);
load->num_components = num_components;
load->variables[0] = nir_deref_var_create(load, var);
nir_ssa_dest_init(&load->instr, &load->dest, num_components, NULL);
nir_builder_instr_insert(build, &load->instr);
return &load->dest.ssa;
}
static inline void
nir_store_var(nir_builder *build, nir_variable *var, nir_ssa_def *value)
{
const unsigned num_components = glsl_get_vector_elements(var->type);
nir_intrinsic_instr *store =
nir_intrinsic_instr_create(build->shader, nir_intrinsic_store_var);
store->num_components = num_components;
store->variables[0] = nir_deref_var_create(store, var);
store->src[0] = nir_src_for_ssa(value);
nir_builder_instr_insert(build, &store->instr);
}
#endif /* NIR_BUILDER_H */