From 9095847c254be2d55ab188232aa6b84555dbac4e Mon Sep 17 00:00:00 2001 From: Kenneth Graunke Date: Mon, 11 Jan 2016 12:25:12 -0800 Subject: [PATCH] i965: Mark TCS URB writes as having side effects. This adds barrier dependencies around TCS_OPCODE_URB_WRITE, preventing reads and writes from being incorrectly scheduled. Fixes rendering in GFXBench 4.0's tessellation demo. For some reason, we haven't ever listed URB writes as having side-effects. This hasn't been a problem because in most stages, we never read from the URB, and only write to each location once. Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=93526 Signed-off-by: Kenneth Graunke Reviewed-by: Chris Forbes --- src/mesa/drivers/dri/i965/brw_shader.cpp | 1 + 1 file changed, 1 insertion(+) diff --git a/src/mesa/drivers/dri/i965/brw_shader.cpp b/src/mesa/drivers/dri/i965/brw_shader.cpp index efc24f92f58..0ac3f4a30fc 100644 --- a/src/mesa/drivers/dri/i965/brw_shader.cpp +++ b/src/mesa/drivers/dri/i965/brw_shader.cpp @@ -1022,6 +1022,7 @@ backend_instruction::has_side_effects() const case SHADER_OPCODE_URB_WRITE_SIMD8_MASKED_PER_SLOT: case FS_OPCODE_FB_WRITE: case SHADER_OPCODE_BARRIER: + case TCS_OPCODE_URB_WRITE: case TCS_OPCODE_RELEASE_INPUT: return true; default: -- 2.30.2