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i965/nir/vec4: Implement load_uniform intrinsic 

For the indirect case we need to take the index delivered by
NIR and compute the parent uniform that we are accessing (the one
that we uploaded to a surface) and the constant offset into that
surface.

Reviewed-by: Jason Ekstrand <jason.ekstrand@intel.com>
This commit is contained in:
Iago Toral Quiroga 2015-06-16 21:55:14 +02:00 committed by Jason Ekstrand
parent e76e8caecd
commit e6cafb5dfd
1 changed files with 24 additions and 2 deletions
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26
src/mesa/drivers/dri/i965/brw_vec4_nir.cpp
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@ -522,10 +522,32 @@ vec4_visitor::nir_emit_intrinsic(nir_intrinsic_instr *instr)
}
case nir_intrinsic_load_uniform_indirect:
has_indirect = true;
/* fallthrough */
case nir_intrinsic_load_uniform:
/* @TODO: Not yet implemented */
case nir_intrinsic_load_uniform: {
int uniform = instr->const_index[0];
dest = get_nir_dest(instr->dest);
if (has_indirect) {
/* Split addressing into uniform and offset */
int offset = uniform - nir_uniform_driver_location[uniform];
assert(offset >= 0);
uniform -= offset;
assert(uniform >= 0);
src = src_reg(dst_reg(UNIFORM, uniform));
src.reg_offset = offset;
src_reg tmp = get_nir_src(instr->src[0], BRW_REGISTER_TYPE_D, 1);
src.reladdr = new(mem_ctx) src_reg(tmp);
} else {
src = src_reg(dst_reg(UNIFORM, uniform));
}
emit(MOV(dest, src));
break;
}
case nir_intrinsic_atomic_counter_read:
case nir_intrinsic_atomic_counter_inc: