Module: Mesa
Branch: gallium-0.2
Commit: df07db810410474680faf07741d9d2ef71083b62
URL:
http://cgit.freedesktop.org/mesa/mesa/commit/?id=df07db810410474680faf07741d9d2ef71083b62
Author: Eric Anholt <[EMAIL PROTECTED]>
Date: Sun Nov 2 12:19:02 2008 -0800
i965: Avoid vs header computation for negative rhw on G4X.
This cuts one MOV out when setting a zero header.
---
src/mesa/drivers/dri/i965/brw_vs_emit.c | 6 +++---
1 files changed, 3 insertions(+), 3 deletions(-)
diff --git a/src/mesa/drivers/dri/i965/brw_vs_emit.c
b/src/mesa/drivers/dri/i965/brw_vs_emit.c
index 0b6c6b2..ed0e1d5 100644
--- a/src/mesa/drivers/dri/i965/brw_vs_emit.c
+++ b/src/mesa/drivers/dri/i965/brw_vs_emit.c
@@ -829,12 +829,12 @@ static void emit_vertex_write( struct brw_vs_compile *c)
ndc = pos;
}
- /* This includes the workaround for -ve rhw, so is no longer an
- * optional step:
+ /* Update the header for point size, user clipping flags, and -ve rhw
+ * workaround.
*/
if ((c->prog_data.outputs_written & (1<<VERT_RESULT_PSIZ)) ||
c->key.nr_userclip ||
- !c->key.know_w_is_one)
+ (!BRW_IS_G4X(p->brw) && !c->key.know_w_is_one))
{
struct brw_reg header1 = retype(get_tmp(c), BRW_REGISTER_TYPE_UD);
GLuint i;
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