From: Eric Anholt <eric@anholt.net>
Date: Thu, 6 May 2010 21:52:16 +0000 (-0700)
Subject: ir_to_mesa: Add codegen for rsq expression operation.
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=878740bedf418e5bf42ed6d350c938d29abaaf25;p=mesa.git

ir_to_mesa: Add codegen for rsq expression operation.
---

diff --git a/ir_to_mesa.cpp b/ir_to_mesa.cpp
index 3fed1577796..b28747e6a26 100644
--- a/ir_to_mesa.cpp
+++ b/ir_to_mesa.cpp
@@ -361,6 +361,9 @@ ir_to_mesa_visitor::visit(ir_expression *ir)
    case ir_unop_sqrt:
       this->result = this->create_tree(MB_TERM_sqrt_vec4, ir, op[0], op[1]);
       break;
+   case ir_unop_rsq:
+      this->result = this->create_tree(MB_TERM_rsq_vec4, ir, op[0], op[1]);
+      break;
    case ir_unop_i2f:
       /* Mesa IR lacks types, ints are stored as floats. */
       this->result = op[0];
diff --git a/mesa_codegen.brg b/mesa_codegen.brg
index ed9afdc57cd..e8d499fd74e 100644
--- a/mesa_codegen.brg
+++ b/mesa_codegen.brg
@@ -60,6 +60,7 @@
 %term dp3_vec4_vec4
 %term dp2_vec4_vec4
 %term sqrt_vec4
+%term rsq_vec4
 %term swizzle_vec4
 
 # Each tree will produce stmt.  Currently, the only production for
@@ -209,6 +210,13 @@ vec4: sqrt_vec4(vec4) 1
 			    tree->src_reg);
 }
 
+vec4: rsq_vec4(vec4) 1
+{
+	ir_to_mesa_emit_scalar_op1(tree, OPCODE_RSQ,
+				   tree->dst_reg,
+				   tree->left->src_reg);
+}
+
 vec4: exp_vec4(vec4) 1
 {
 	ir_to_mesa_emit_scalar_op1(tree, OPCODE_EXP,