From: Dave Airlie <airlied@redhat.com>
Date: Mon, 13 Nov 2017 05:40:15 +0000 (+1000)
Subject: r600: fix isoline tess factor component swapping.
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=f3f8615d76b20ad66466b172a600e06b9a833729;p=mesa.git

r600: fix isoline tess factor component swapping.

As per radeonsi, the tess factor components for isolines
are reversed.

Fixes: tests/spec/arb_tessellation_shader/execution/isoline.shader_test
Cc: <mesa-stable@lists.freedesktop.org>
Signed-off-by: Dave Airlie <airlied@redhat.com>
---

diff --git a/src/gallium/drivers/r600/r600_shader.c b/src/gallium/drivers/r600/r600_shader.c
index c6e445744ed..146c26ce1a6 100644
--- a/src/gallium/drivers/r600/r600_shader.c
+++ b/src/gallium/drivers/r600/r600_shader.c
@@ -2884,6 +2884,13 @@ static int r600_emit_tess_factor(struct r600_shader_ctx *ctx)
 		int out_idx = i >= outer_comps ? tessinner_idx : tessouter_idx;
 		int out_comp = i >= outer_comps ? i - outer_comps : i;
 
+		if (ctx->shader->tcs_prim_mode == PIPE_PRIM_LINES) {
+			if (out_comp == 1)
+				out_comp = 0;
+			else if (out_comp == 0)
+				out_comp = 1;
+		}
+
 		r = single_alu_op2(ctx, ALU_OP2_ADD_INT,
 				   treg[i / 2], (2 * (i % 2)),
 				   temp_reg, 0,