i965/fs: Fix GPU hangs with 16-wide integer div/mod on gen7.

Acked-by: Kenneth Graunke <kenneth@whitecape.org>

diff --git a/src/mesa/drivers/dri/i965/brw_fs_visitor.cpp b/src/mesa/drivers/dri/i965/brw_fs_visitor.cpp
index 9f8a44a..44c9ee8 100644 (file)
--- a/src/mesa/drivers/dri/i965/brw_fs_visitor.cpp
+++ b/src/mesa/drivers/dri/i965/brw_fs_visitor.cpp
@@ -306,11 +306,17 @@ fs_visitor::visit(ir_expression *ir)
       }
       break;
    case ir_binop_div:
+      if (intel->gen >= 7 && c->dispatch_width == 16)
+        fail("16-wide INTDIV unsupported\n");
+
       /* Floating point should be lowered by DIV_TO_MUL_RCP in the compiler. */
       assert(ir->type->is_integer());
       emit_math(SHADER_OPCODE_INT_QUOTIENT, this->result, op[0], op[1]);
       break;
    case ir_binop_mod:
+      if (intel->gen >= 7 && c->dispatch_width == 16)
+        fail("16-wide INTDIV unsupported\n");
+
       /* Floating point should be lowered by MOD_TO_FRACT in the compiler. */
       assert(ir->type->is_integer());
       emit_math(SHADER_OPCODE_INT_REMAINDER, this->result, op[0], op[1]);