From e6ec500e19f455237828f4f3955f888ad0b56382 Mon Sep 17 00:00:00 2001
From: Eric Anholt <eric@anholt.net>
Date: Fri, 20 Aug 2010 15:32:17 -0700
Subject: i965: Also use the SIMD8 FB writes for SIMD8 mode on non-SNB.

---
 src/mesa/drivers/dri/i965/brw_eu.h      |  1 +
 src/mesa/drivers/dri/i965/brw_eu_emit.c | 13 +++++++------
 src/mesa/drivers/dri/i965/brw_wm_emit.c | 21 ++++++++++-----------
 3 files changed, 18 insertions(+), 17 deletions(-)

(limited to 'src/mesa/drivers')

diff --git a/src/mesa/drivers/dri/i965/brw_eu.h b/src/mesa/drivers/dri/i965/brw_eu.h
index 1ead4455d3..6e9e210cf1 100644
--- a/src/mesa/drivers/dri/i965/brw_eu.h
+++ b/src/mesa/drivers/dri/i965/brw_eu.h
@@ -845,6 +845,7 @@ void brw_ff_sync(struct brw_compile *p,
 		   GLboolean eot);
 
 void brw_fb_WRITE(struct brw_compile *p,
+		  int dispatch_width,
 		   struct brw_reg dest,
 		   GLuint msg_reg_nr,
 		   struct brw_reg src0,
diff --git a/src/mesa/drivers/dri/i965/brw_eu_emit.c b/src/mesa/drivers/dri/i965/brw_eu_emit.c
index c9b4770fd9..a6ca030afe 100644
--- a/src/mesa/drivers/dri/i965/brw_eu_emit.c
+++ b/src/mesa/drivers/dri/i965/brw_eu_emit.c
@@ -1350,6 +1350,7 @@ void brw_dp_READ_4_vs_relative(struct brw_compile *p,
 
 
 void brw_fb_WRITE(struct brw_compile *p,
+		  int dispatch_width,
                   struct brw_reg dest,
                   GLuint msg_reg_nr,
                   struct brw_reg src0,
@@ -1370,18 +1371,18 @@ void brw_fb_WRITE(struct brw_compile *p,
        /* headerless version, just submit color payload */
        src0 = brw_message_reg(msg_reg_nr);
 
-       if (msg_length >= 8)
-	  msg_control = BRW_DATAPORT_RENDER_TARGET_WRITE_SIMD16_SINGLE_SOURCE;
-       else
-	  msg_control = BRW_DATAPORT_RENDER_TARGET_WRITE_SIMD8_SINGLE_SOURCE_SUBSPAN01;
        msg_type = BRW_DATAPORT_WRITE_MESSAGE_RENDER_TARGET_WRITE_GEN6;
    } else {
       insn->header.destreg__conditionalmod = msg_reg_nr;
 
-      msg_control = BRW_DATAPORT_RENDER_TARGET_WRITE_SIMD16_SINGLE_SOURCE;
-       msg_type = BRW_DATAPORT_WRITE_MESSAGE_RENDER_TARGET_WRITE;
+      msg_type = BRW_DATAPORT_WRITE_MESSAGE_RENDER_TARGET_WRITE;
    }
 
+   if (dispatch_width == 16)
+      msg_control = BRW_DATAPORT_RENDER_TARGET_WRITE_SIMD16_SINGLE_SOURCE;
+   else
+      msg_control = BRW_DATAPORT_RENDER_TARGET_WRITE_SIMD8_SINGLE_SOURCE_SUBSPAN01;
+
    brw_set_dest(insn, dest);
    brw_set_src0(insn, src0);
    brw_set_dp_write_message(p->brw,
diff --git a/src/mesa/drivers/dri/i965/brw_wm_emit.c b/src/mesa/drivers/dri/i965/brw_wm_emit.c
index 78de2ceda9..5c07108eb8 100644
--- a/src/mesa/drivers/dri/i965/brw_wm_emit.c
+++ b/src/mesa/drivers/dri/i965/brw_wm_emit.c
@@ -1255,6 +1255,7 @@ static void fire_fb_write( struct brw_wm_compile *c,
    /* Send framebuffer write message: */
 /*  send (16) null.0<1>:uw m0               r0.0<8;8,1>:uw   0x85a04000:ud    { Align1 EOT } */
    brw_fb_WRITE(p,
+		c->dispatch_width,
 		dst,
 		base_reg,
 		retype(brw_vec8_grf(0, 0), BRW_REGISTER_TYPE_UW),
@@ -1376,17 +1377,10 @@ void emit_fb_write(struct brw_wm_compile *c,
    }
    /* skip over the regs populated above:
     */
-   if (intel->gen < 6) {
-      nr += 8; /* XXX: always uses SIMD16 write currently. */
-   } else {
-      if (c->dispatch_width == 16)
-	 nr += 8;
-      else
-	 nr += 4;
-
-      /* Subtract off the message header, since we send headerless. */
-      nr -= 2;
-   }
+   if (c->dispatch_width == 16)
+      nr += 8;
+   else
+      nr += 4;
 
    brw_pop_insn_state(p);
 
@@ -1420,6 +1414,11 @@ void emit_fb_write(struct brw_wm_compile *c,
       nr += 2;
    }
 
+   if (intel->gen >= 6) {
+      /* Subtract off the message header, since we send headerless. */
+      nr -= 2;
+   }
+
    if (!c->key.runtime_check_aads_emit) {
       if (c->key.aa_dest_stencil_reg)
 	 emit_aa(c, arg1, 2);
-- 
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