i965: Define brw_int_type() helper.

Intended as a (partial) inverse of type_sz().  Will be useful in the
next commit and some other SIMD32 generator changes I have queued up.

Reviewed-by: Jason Ekstrand <jason@jlekstrand.net>

diff --git a/src/mesa/drivers/dri/i965/brw_reg.h b/src/mesa/drivers/dri/i965/brw_reg.h
index b0ef94e96d0444979cfef32cc1f8cd601baf79be..bd7ea1ba7bcb6ddb31c6c20363d4f024a8b6568a 100644 (file)
--- a/src/mesa/drivers/dri/i965/brw_reg.h
+++ b/src/mesa/drivers/dri/i965/brw_reg.h
@@ -304,6 +304,26 @@ type_sz(unsigned type)
    }
 }
 
+/**
+ * Return an integer type of the requested size and signedness.
+ */
+static inline enum brw_reg_type
+brw_int_type(unsigned sz, bool is_signed)
+{
+   switch (sz) {
+   case 1:
+      return (is_signed ? BRW_REGISTER_TYPE_B : BRW_REGISTER_TYPE_UB);
+   case 2:
+      return (is_signed ? BRW_REGISTER_TYPE_W : BRW_REGISTER_TYPE_UW);
+   case 4:
+      return (is_signed ? BRW_REGISTER_TYPE_D : BRW_REGISTER_TYPE_UD);
+   case 8:
+      return (is_signed ? BRW_REGISTER_TYPE_Q : BRW_REGISTER_TYPE_UQ);
+   default:
+      unreachable("Not reached.");
+   }
+}
+
 /**
  * Construct a brw_reg.
  * \param file      one of the BRW_x_REGISTER_FILE values