Module: Mesa
Branch: master
Commit: 706b916960c898cfc24110f14fa4def84caaba93
URL:
http://cgit.freedesktop.org/mesa/mesa/commit/?id=706b916960c898cfc24110f14fa4def84caaba93
Author: Kenneth Graunke <kenn...@whitecape.org>
Date: Wed Mar 4 12:53:45 2015 -0800
i965/skl: Break down SIMD16 3-source instructions when required.
Several steppings of Skylake fail when using SIMD16 with 3-source
instructions (such as MAD).
This implements WaDisableSIMD16On3SrcInstr and fixes ~190 Piglit
tests.
Based on a patch by Neil Roberts.
Signed-off-by: Kenneth Graunke <kenn...@whitecape.org>
Reviewed-by: Neil Roberts <n...@linux.intel.com>
---
src/mesa/drivers/dri/i965/brw_fs_generator.cpp | 6 ++++++
1 file changed, 6 insertions(+)
diff --git a/src/mesa/drivers/dri/i965/brw_fs_generator.cpp
b/src/mesa/drivers/dri/i965/brw_fs_generator.cpp
index 6eebee1..3aa5c3c 100644
--- a/src/mesa/drivers/dri/i965/brw_fs_generator.cpp
+++ b/src/mesa/drivers/dri/i965/brw_fs_generator.cpp
@@ -1559,6 +1559,12 @@ fs_generator::enable_debug(const char *shader_name)
static bool
brw_supports_simd16_3src(const struct brw_context *brw)
{
+ /* WaDisableSIMD16On3SrcInstr: 3-source instructions don't work in SIMD16
+ * on a few steppings of Skylake.
+ */
+ if (brw->gen == 9)
+ return brw->revision != 2 && brw->revision != 3 && brw->revision != -1;
+
return brw->is_haswell || brw->gen >= 8;
}
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