1 files changed, 11 insertions, 0 deletions
diff --git a/src/mesa/drivers/dri/i965/brw_vec4.cpp b/src/mesa/drivers/dri/i965/brw_vec4.cpp
index e0a3d5fa786..46aa7d5a8ae 100644
--- a/src/mesa/drivers/dri/i965/brw_vec4.cpp
+++ b/src/mesa/drivers/dri/i965/brw_vec4.cpp
@@ -731,6 +731,17 @@ vec4_visitor::opt_algebraic()
 	    progress = true;
 	 }
 	 break;
+      case SHADER_OPCODE_RCP: {
+         vec4_instruction *prev = (vec4_instruction *)inst->prev;
+         if (prev->opcode == SHADER_OPCODE_SQRT) {
+            if (inst->src[0].equals(src_reg(prev->dst))) {
+               inst->opcode = SHADER_OPCODE_RSQ;
+               inst->src[0] = prev->src[0];
+               progress = true;
+            }
+         }
+         break;
+      }
       default:
 	 break;
       }