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i965/nir/vec4: Implement conditional statements (nir_cf_node_if)

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The same we do in the FS NIR backend, only that here we need to consider
the number of components in the condition and adjust the swizzle
accordingly.

Reviewed-by: Jason Ekstrand <jason.ekstrand@intel.com>
This commit is contained in:
Iago Toral Quiroga 2015-06-16 20:16:15 +02:00 • committed by Jason Ekstrand
parent f3187ea31e
commit 5c0436dbf8
1 changed files with 15 additions and 1 deletions
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16
src/mesa/drivers/dri/i965/brw_vec4_nir.cpp
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@ -282,7 +282,21 @@ vec4_visitor::nir_emit_cf_list(exec_list *list)
void
vec4_visitor::nir_emit_if(nir_if *if_stmt)
{
/* @TODO: Not yet implemented */
/* First, put the condition in f0 */
src_reg condition = get_nir_src(if_stmt->condition, BRW_REGISTER_TYPE_D, 1);
vec4_instruction *inst = emit(MOV(dst_null_d(), condition));
inst->conditional_mod = BRW_CONDITIONAL_NZ;
emit(IF(BRW_PREDICATE_NORMAL));
nir_emit_cf_list(&if_stmt->then_list);
/* note: if the else is empty, dead CF elimination will remove it */
emit(BRW_OPCODE_ELSE);
nir_emit_cf_list(&if_stmt->else_list);
emit(BRW_OPCODE_ENDIF);
}
void