From 0a6811207fbe18d49c7ab95f93ed01f75ffcdda0 Mon Sep 17 00:00:00 2001 From: Jason Ekstrand Date: Thu, 14 Jan 2016 12:08:57 -0800 Subject: [PATCH] i965/vec4: Use UW type for multiply into accumulator on GEN8+ BDW adds the following restriction: "When multiplying DW x DW, the dst cannot be accumulator." Cc: "11.1,11.0" Reviewed-by: Matt Turner --- src/mesa/drivers/dri/i965/brw_vec4_nir.cpp | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-) diff --git a/src/mesa/drivers/dri/i965/brw_vec4_nir.cpp b/src/mesa/drivers/dri/i965/brw_vec4_nir.cpp index 0ae723f07e9..4ee2ed47d40 100644 --- a/src/mesa/drivers/dri/i965/brw_vec4_nir.cpp +++ b/src/mesa/drivers/dri/i965/brw_vec4_nir.cpp @@ -1069,7 +1069,11 @@ vec4_visitor::nir_emit_alu(nir_alu_instr *instr) case nir_op_umul_high: { struct brw_reg acc = retype(brw_acc_reg(8), dst.type); - emit(MUL(acc, op[0], op[1])); + if (devinfo->gen >=8) + emit(MUL(acc, op[0], retype(op[1], BRW_REGISTER_TYPE_UW))); + else + emit(MUL(acc, op[0], op[1])); + emit(MACH(dst, op[0], op[1])); break; }