# define R300_Z_WRITE_ENABLE (1 << 2)
# define R300_Z_SIGNED_COMPARE (1 << 3)
# define R300_STENCIL_FRONT_BACK (1 << 4)
+# define R400_ZSIGNED_MAGNITUDE (1 << 5)
+# define R500_STENCIL_REFMASK_FRONT_BACK (1 << 6)
#define R300_ZB_ZSTENCILCNTL 0x4f04
/* functions */
# define R500_INST_RGB_CLAMP (1 << 19)
# define R500_INST_ALPHA_CLAMP (1 << 20)
# define R500_INST_ALU_RESULT_SEL (1 << 21)
+# define R500_INST_ALU_RESULT_SEL_RED (0 << 21)
+# define R500_INST_ALU_RESULT_SEL_ALPHA (1 << 21)
# define R500_INST_ALPHA_PRED_INV (1 << 22)
# define R500_INST_ALU_RESULT_OP_EQ (0 << 23)
# define R500_INST_ALU_RESULT_OP_LT (1 << 23)