+#define BRW_SAMPLER_MESSAGE_SAMPLE_IGDNG 0
+#define BRW_SAMPLER_MESSAGE_SAMPLE_BIAS_IGDNG 1
+#define BRW_SAMPLER_MESSAGE_SAMPLE_LOD_IGDNG 2
+#define BRW_SAMPLER_MESSAGE_SAMPLE_COMPARE_IGDNG 3
+
+/* for IGDNG only */
+#define BRW_SAMPLER_SIMD_MODE_SIMD4X2 0
+#define BRW_SAMPLER_SIMD_MODE_SIMD8 1
+#define BRW_SAMPLER_SIMD_MODE_SIMD16 2
+#define BRW_SAMPLER_SIMD_MODE_SIMD32_64 3
+