i965: Avoid using float type for raw moves, to work around SNB issue.

The SNB alt-mode math does the denorm and inf reduction even for a
"raw MOV" like we do for g0 message header setup, where we are moving
values that aren't actually floats.  Just use UD type, where raw MOVs
really are raw MOVs.

Fixes glxgears since c52adfc2e1d130effea940e75690897eb5d3ceaa, but no
piglit tests had regressed(!)

diff --git a/src/mesa/drivers/dri/i965/brw_eu_emit.c b/src/mesa/drivers/dri/i965/brw_eu_emit.c
index 9c764fe779d9fc46680ca4503e4090b40ef88fb8..2bdcacfb2ede5d32b143d2ff209c107ec57af827 100644 (file)
--- a/src/mesa/drivers/dri/i965/brw_eu_emit.c
+++ b/src/mesa/drivers/dri/i965/brw_eu_emit.c
@@ -1936,7 +1936,8 @@ void brw_SAMPLE(struct brw_compile *p,
         brw_set_compression_control(p, BRW_COMPRESSION_NONE);
         brw_set_mask_control(p, BRW_MASK_DISABLE);
 
-        brw_MOV(p, m1, brw_vec8_grf(0,0));      
+        brw_MOV(p, retype(m1, BRW_REGISTER_TYPE_UD),
+                retype(brw_vec8_grf(0,0), BRW_REGISTER_TYPE_UD));
         brw_MOV(p, get_element_ud(m1, 2), brw_imm_ud(newmask << 12)); 
 
         brw_pop_insn_state(p);
@@ -1997,7 +1998,8 @@ void brw_SAMPLE(struct brw_compile *p,
        */
       brw_push_insn_state(p);
       brw_set_compression_control(p, BRW_COMPRESSION_NONE);
-      brw_MOV(p, reg, reg);          
+      brw_MOV(p, retype(reg, BRW_REGISTER_TYPE_UD),
+             retype(reg, BRW_REGISTER_TYPE_UD));
       brw_pop_insn_state(p);
    }
 
@@ -2029,7 +2031,8 @@ void brw_urb_WRITE(struct brw_compile *p,
    if (intel->gen >= 6) {
       brw_push_insn_state(p);
       brw_set_mask_control( p, BRW_MASK_DISABLE );
-      brw_MOV(p, brw_message_reg(msg_reg_nr), src0);
+      brw_MOV(p, retype(brw_message_reg(msg_reg_nr), BRW_REGISTER_TYPE_UD),
+             retype(src0, BRW_REGISTER_TYPE_UD));
       brw_pop_insn_state(p);
       src0 = brw_message_reg(msg_reg_nr);
    }

diff --git a/src/mesa/drivers/dri/i965/brw_wm_emit.c b/src/mesa/drivers/dri/i965/brw_wm_emit.c
index be86e0e1287bb6ea3c50e77ff53528dbe4c86af1..39cf96467af4b124370d336294cc5a0b5399961d 100644 (file)
--- a/src/mesa/drivers/dri/i965/brw_wm_emit.c
+++ b/src/mesa/drivers/dri/i965/brw_wm_emit.c
@@ -1501,7 +1501,8 @@ void emit_fb_write(struct brw_wm_compile *c,
        */
       brw_push_insn_state(p);
       brw_set_mask_control(p, BRW_MASK_DISABLE);
-      brw_MOV(p, brw_message_reg(0), brw_vec8_grf(0, 0));
+      brw_MOV(p, retype(brw_message_reg(0), BRW_REGISTER_TYPE_UD),
+             retype(brw_vec8_grf(0, 0), BRW_REGISTER_TYPE_UD));
       brw_pop_insn_state(p);
 
       if (target != 0) {