i965: Use float calculations when double is unnecessary.

Literals without an f/F suffix are of type double, and implicit
conversion rules specify that the float in (float op double) be
converted to a double before the operation is performed. I believe float
execution was intended (in nearly all cases) or is sufficient (in the
case of gen7_urb.c).

Removes a lot of float <-> double conversion instructions and replaces
many double instructions with float instructions which are cheaper.

   text     data      bss      dec      hex  filename
4928659   195160    26192  5150011   4e953b  i965_dri.so before
4928315   195152    26192  5149659   4e93db  i965_dri.so after

Reviewed-by: Iago Toral Quiroga <[email protected]>

1 files changed, 2 insertions, 2 deletions

diff --git a/src/mesa/drivers/dri/i965/brw_fs.cpp b/src/mesa/drivers/dri/i965/brw_fs.cpp
index 565edeb401e..15fe3648af8 100644
--- a/src/mesa/drivers/dri/i965/brw_fs.cpp
+++ b/src/mesa/drivers/dri/i965/brw_fs.cpp
@@ -975,11 +975,11 @@ fs_visitor::emit_fragcoord_interpolation(bool pixel_center_integer,
       bld.MOV(wpos, this->pixel_y);
    } else {
       fs_reg pixel_y = this->pixel_y;
-      float offset = (pixel_center_integer ? 0.0 : 0.5);
+      float offset = (pixel_center_integer ? 0.0f : 0.5f);
 
       if (flip) {
 	 pixel_y.negate = true;
-	 offset += key->drawable_height - 1.0;
+	 offset += key->drawable_height - 1.0f;
       }
 
       bld.ADD(wpos, pixel_y, fs_reg(offset));