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-rw-r--r--src/mesa/drivers/dri/i965/brw_fs_visitor.cpp3
1 files changed, 3 insertions, 0 deletions
diff --git a/src/mesa/drivers/dri/i965/brw_fs_visitor.cpp b/src/mesa/drivers/dri/i965/brw_fs_visitor.cpp
index b4ef80b6546..a672ee624b2 100644
--- a/src/mesa/drivers/dri/i965/brw_fs_visitor.cpp
+++ b/src/mesa/drivers/dri/i965/brw_fs_visitor.cpp
@@ -337,6 +337,9 @@ fs_visitor::visit(ir_expression *ir)
* FINISHME: Emit just the MUL if we know an operand is small
* enough.
*/
+ if (intel->gen >= 7 && c->dispatch_width == 16)
+ fail("16-wide explicit accumulator operands unsupported\n");
+
struct brw_reg acc = retype(brw_acc_reg(), BRW_REGISTER_TYPE_D);
emit(BRW_OPCODE_MUL, acc, op[0], op[1]);