i965: clear global offset to zero in m0.2 for VS DP read.

Signed-off-by: Zou Nan hai <nanhai.zou@intel.com>

diff --git a/src/mesa/drivers/dri/i965/brw_eu_emit.c b/src/mesa/drivers/dri/i965/brw_eu_emit.c
index 57313a59c080a28321d2d6c856a6237a1f31cecb..c5cde2216697302eeb8ef42bcc8a2f833d0552b9 100644 (file)
--- a/src/mesa/drivers/dri/i965/brw_eu_emit.c
+++ b/src/mesa/drivers/dri/i965/brw_eu_emit.c
@@ -1759,6 +1759,11 @@ void brw_dp_READ_4_vs(struct brw_compile *p,
    brw_set_compression_control(p, BRW_COMPRESSION_NONE);
    brw_set_mask_control(p, BRW_MASK_DISABLE);
    brw_set_predicate_control(p, BRW_PREDICATE_NONE);
+
+   /* M0.2 is global offset */
+   brw_MOV(p, retype(get_element(brw_message_reg(0), 2), BRW_REGISTER_TYPE_D),
+                   brw_imm_d(0));
+
    brw_MOV(p, retype(brw_vec1_reg(BRW_MESSAGE_REGISTER_FILE, msg_reg_nr, 2),
                     BRW_REGISTER_TYPE_UD),
           brw_imm_ud(location));
@@ -1809,6 +1814,10 @@ void brw_dp_READ_4_vs_relative(struct brw_compile *p,
    brw_set_mask_control(p, BRW_MASK_DISABLE);
    brw_set_predicate_control(p, BRW_PREDICATE_NONE);
 
+   /* M0.2 is global offset */
+   brw_MOV(p, retype(get_element(brw_message_reg(0), 2), BRW_REGISTER_TYPE_D),
+                   brw_imm_d(0));
+
    /* M1.0 is block offset 0, M1.4 is block offset 1, all other
     * fields ignored.
     */