From 0f541367304ecb3be2de5c965525a65a9709fc38 Mon Sep 17 00:00:00 2001
From: Georg Lehmann <dadschoorse@gmail.com>
Date: Thu, 30 Oct 2025 09:32:38 +0100
Subject: [PATCH] aco/isel: emit vop2 v_lshlrev_b64 for gfx12+

Reviewed-by: Rhys Perry <pendingchaos02@gmail.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/38156>
---
 src/amd/compiler/instruction_selection/aco_select_nir_alu.cpp | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/src/amd/compiler/instruction_selection/aco_select_nir_alu.cpp b/src/amd/compiler/instruction_selection/aco_select_nir_alu.cpp
index a7b3f7c94da..be45fe24e84 100644
--- a/src/amd/compiler/instruction_selection/aco_select_nir_alu.cpp
+++ b/src/amd/compiler/instruction_selection/aco_select_nir_alu.cpp
@@ -1128,6 +1128,8 @@ visit_alu_instr(isel_context* ctx, nir_alu_instr* instr)
       } else if (dst.regClass() == v1) {
          emit_vop2_instruction(ctx, instr, aco_opcode::v_lshlrev_b32, dst, false, true, false,
                                false, 1);
+      } else if (dst.regClass() == v2 && ctx->program->gfx_level >= GFX12) {
+         emit_vop2_instruction(ctx, instr, aco_opcode::v_lshlrev_b64, dst, false, true);
       } else if (dst.regClass() == v2 && ctx->program->gfx_level >= GFX8) {
          bld.vop3(aco_opcode::v_lshlrev_b64_e64, Definition(dst), get_alu_src(ctx, instr->src[1]),
                   get_alu_src(ctx, instr->src[0]));