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i965/vec4: Implement nir_op_pack_uvec2_to_uint. 

And mark nir_op_pack_uvec4_to_uint unreachable, since it's only produced
by lowering pack[SU]norm4x8 which the vec4 backend does not need.
This commit is contained in:
Matt Turner 2016-01-25 10:49:15 -08:00
parent 8bb22dc351
commit 5deba3f00a
1 changed files with 18 additions and 0 deletions
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18
src/mesa/drivers/dri/i965/brw_vec4_nir.cpp
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@ -1325,6 +1325,24 @@ vec4_visitor::nir_emit_alu(nir_alu_instr *instr)
case nir_op_pack_unorm_2x16:
unreachable("not reached: should be handled by lower_packing_builtins");
case nir_op_pack_uvec4_to_uint:
unreachable("not reached");
case nir_op_pack_uvec2_to_uint: {
dst_reg tmp1 = dst_reg(this, glsl_type::uint_type);
tmp1.writemask = WRITEMASK_X;
op[0].swizzle = BRW_SWIZZLE_YYYY;
emit(SHL(tmp1, op[0], src_reg(brw_imm_ud(16u))));
dst_reg tmp2 = dst_reg(this, glsl_type::uint_type);
tmp2.writemask = WRITEMASK_X;
op[0].swizzle = BRW_SWIZZLE_XXXX;
emit(AND(tmp2, op[0], src_reg(brw_imm_ud(0xffffu))));
emit(OR(dst, src_reg(tmp1), src_reg(tmp2)));
break;
}
case nir_op_unpack_half_2x16:
/* As NIR does not guarantee that we have a correct swizzle outside the
* boundaries of a vector, and the implementation of emit_unpack_half_2x16