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i965/vec4/tcs: fix input loading for 64-bit data

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v2: use byte_offset() instead of offset()

Reviewed-by: Matt Turner <mattst88@gmail.com>
This commit is contained in:
Iago Toral Quiroga
2016-07-01 11:35:06 +02:00
committed by Samuel Iglesias Gonsálvez
parent 74fd0c590b
commit 639e92ea3c
1 changed files with 30 additions and 4 deletions
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34
src/mesa/drivers/dri/i965/brw_vec4_tcs.cpp
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@@ -275,11 +275,37 @@ vec4_tcs_visitor::nir_emit_intrinsic(nir_intrinsic_instr *instr)
vertex_const ? src_reg(brw_imm_ud(vertex_const->u32[0])) vertex_const ? src_reg(brw_imm_ud(vertex_const->u32[0]))
: get_nir_src(instr->src[0], BRW_REGISTER_TYPE_UD, 1); : get_nir_src(instr->src[0], BRW_REGISTER_TYPE_UD, 1);
dst_reg dst = get_nir_dest(instr->dest, BRW_REGISTER_TYPE_D); unsigned first_component = nir_intrinsic_component(instr);
dst.writemask = brw_writemask_for_size(instr->num_components); if (nir_dest_bit_size(instr->dest) == 64) {
/* We need to emit up to two 32-bit URB reads, then shuffle
* the result into a temporary, then move to the destination
* honoring the writemask
*
* We don't need to divide first_component by 2 because
* emit_input_urb_read takes a 32-bit type.
*/
dst_reg tmp = dst_reg(this, glsl_type::dvec4_type);
dst_reg tmp_d = retype(tmp, BRW_REGISTER_TYPE_D);
emit_input_urb_read(tmp_d, vertex_index, imm_offset,
first_component, indirect_offset);
if (instr->num_components > 2) {
emit_input_urb_read(byte_offset(tmp_d, REG_SIZE), vertex_index,
imm_offset + 1, 0, indirect_offset);
}
emit_input_urb_read(dst, vertex_index, imm_offset, src_reg tmp_src = retype(src_reg(tmp_d), BRW_REGISTER_TYPE_DF);
nir_intrinsic_component(instr), indirect_offset); dst_reg shuffled = dst_reg(this, glsl_type::dvec4_type);
shuffle_64bit_data(shuffled, tmp_src, false);
dst_reg dst = get_nir_dest(instr->dest, BRW_REGISTER_TYPE_DF);
dst.writemask = brw_writemask_for_size(instr->num_components);
emit(MOV(dst, src_reg(shuffled)));
} else {
dst_reg dst = get_nir_dest(instr->dest, BRW_REGISTER_TYPE_D);
dst.writemask = brw_writemask_for_size(instr->num_components);
emit_input_urb_read(dst, vertex_index, imm_offset,
first_component, indirect_offset);
}
break; break;
} }
case nir_intrinsic_load_input: case nir_intrinsic_load_input: