i965: Micro-optimise check_state

Replace the intermediate tests due to the logical or with the bitwise
or.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>

diff --git a/src/mesa/drivers/dri/i965/brw_state_upload.c b/src/mesa/drivers/dri/i965/brw_state_upload.c
index 8bb92fed5d1dd8d0e0ba8fcf18ef6e2b971d3691..2d6fb37355dc1a9914489bac5305cfa69e2efa9f 100644 (file)
--- a/src/mesa/drivers/dri/i965/brw_state_upload.c
+++ b/src/mesa/drivers/dri/i965/brw_state_upload.c
@@ -181,11 +181,11 @@ void brw_destroy_state( struct brw_context *brw )
 /***********************************************************************
  */
 
-static GLboolean check_state( const struct brw_state_flags *a,
-                             const struct brw_state_flags *b )
+static GLuint check_state( const struct brw_state_flags *a,
+                          const struct brw_state_flags *b )
 {
-   return ((a->mesa & b->mesa) ||
-          (a->brw & b->brw) ||
+   return ((a->mesa & b->mesa) |
+          (a->brw & b->brw) |
           (a->cache & b->cache));
 }
 
@@ -377,9 +377,7 @@ void brw_validate_state( struct brw_context *brw )
       brw->state.dirty.brw |= BRW_NEW_VERTEX_PROGRAM;
    }
 
-   if (state->mesa == 0 &&
-       state->cache == 0 &&
-       state->brw == 0)
+   if ((state->mesa | state->cache | state->brw) == 0)
       return;
 
    brw->intel.Fallback = GL_FALSE; /* boolean, not bitfield */