[Mesa-dev] [PATCH 1/2] i965: Set the mvp_with_dp4 flag.

[Kenneth Graunke]

Doing matrix multiplies with DP4s is fewer instructions than MUL/ADD,
especially since we don't support MAD in the vertex shader.

Not observed to improve performance in any fixed function applications,
but is useful for the next patch.

Signed-off-by: Kenneth Graunke <kenneth at whitecape.org>
---
 src/mesa/drivers/dri/i965/brw_context.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/src/mesa/drivers/dri/i965/brw_context.c b/src/mesa/drivers/dri/i965/brw_context.c
index ceaf325..7eb2532 100644
--- a/src/mesa/drivers/dri/i965/brw_context.c
+++ b/src/mesa/drivers/dri/i965/brw_context.c
@@ -153,6 +153,8 @@ brwCreateContext(int api,
    if (tnl)
       tnl->Driver.RunPipeline = _tnl_run_pipeline;
 
+   ctx->mvp_with_dp4 = true;
+
    ctx->Const.MaxDualSourceDrawBuffers = 1;
    ctx->Const.MaxDrawBuffers = BRW_MAX_DRAW_BUFFERS;
    ctx->Const.MaxTextureImageUnits = BRW_MAX_TEX_UNIT;
-- 
1.8.2