Mesa (master): r600g: fix interpolation with clipvertex

[Dave Airlie]

Module: Mesa
Branch: master
Commit: 5a84cc4ebcc99fb029d5f855e8afa11fab09266a
URL:    http://cgit.freedesktop.org/mesa/mesa/commit/?id=5a84cc4ebcc99fb029d5f855e8afa11fab09266a

Author: Vadim Girlin <vadimgirlin at gmail.com>
Date:   Mon Jan 23 15:58:31 2012 +0400

r600g: fix interpolation with clipvertex

Signed-off-by: Vadim Girlin <vadimgirlin at gmail.com>
Signed-off-by: Dave Airlie <airlied at redhat.com>

---

 src/gallium/drivers/r600/r600_shader.c |    3 +++
 1 files changed, 3 insertions(+), 0 deletions(-)

diff --git a/src/gallium/drivers/r600/r600_shader.c b/src/gallium/drivers/r600/r600_shader.c
index aac1cd3..46a9723 100644
--- a/src/gallium/drivers/r600/r600_shader.c
+++ b/src/gallium/drivers/r600/r600_shader.c
@@ -979,6 +979,9 @@ static int r600_shader_from_tgsi(struct r600_pipe_context * rctx, struct r600_pi
 		shader->output[noutput].gpr = ctx.temp_reg+1;
 		noutput++;
 
+		/* reset spi_sid for clipvertex output to avoid confusing spi */
+		shader->output[ctx.cv_output].spi_sid = 0;
+
 		shader->clip_dist_write = 0xFF;
 
 		for (i = 0; i < 8; i++) {