From: Marek Olšák <maraeo@gmail.com>
Date: Thu, 25 Nov 2010 11:13:36 +0000 (-0800)
Subject: ir_to_mesa: Add support for conditional discards.
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=ead2ea89f42b40edc56ddf8c6ce1df4efdcefe2a;p=mesa.git

ir_to_mesa: Add support for conditional discards.

NOTE: This is a candidate for the 7.9 branch.

Signed-off-by: Marek Olšák <maraeo@gmail.com>
Signed-off-by: Kenneth Graunke <kenneth@whitecape.org>
---

diff --git a/src/mesa/program/ir_to_mesa.cpp b/src/mesa/program/ir_to_mesa.cpp
index 8f75c82c3eb..5dd602fd83f 100644
--- a/src/mesa/program/ir_to_mesa.cpp
+++ b/src/mesa/program/ir_to_mesa.cpp
@@ -2166,9 +2166,14 @@ ir_to_mesa_visitor::visit(ir_discard *ir)
 {
    struct gl_fragment_program *fp = (struct gl_fragment_program *)this->prog;
 
-   assert(ir->condition == NULL); /* FINISHME */
+   if (ir->condition) {
+      ir->condition->accept(this);
+      this->result.negate = ~this->result.negate;
+      ir_to_mesa_emit_op1(ir, OPCODE_KIL, ir_to_mesa_undef_dst, this->result);
+   } else {
+      ir_to_mesa_emit_op0(ir, OPCODE_KIL_NV);
+   }
 
-   ir_to_mesa_emit_op0(ir, OPCODE_KIL_NV);
    fp->UsesKill = GL_TRUE;
 }