From 3238e64d3ce0695d2f42eeaea9eb630d4fdf3c37 Mon Sep 17 00:00:00 2001
From: Georg Lehmann <dadschoorse@gmail.com>
Date: Mon, 26 Jan 2026 19:24:48 +0100
Subject: [PATCH] aco/ra: create v_dot2c_f32_f16
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Reviewed-by: Daniel Schürmann <daniel@schuermann.dev>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/40003>
---
 src/amd/compiler/aco_ir.cpp                  | 3 ++-
 src/amd/compiler/aco_register_allocation.cpp | 5 +++++
 2 files changed, 7 insertions(+), 1 deletion(-)

diff --git a/src/amd/compiler/aco_ir.cpp b/src/amd/compiler/aco_ir.cpp
index 50a884202a3..53758ea4d3e 100644
--- a/src/amd/compiler/aco_ir.cpp
+++ b/src/amd/compiler/aco_ir.cpp
@@ -1492,7 +1492,8 @@ get_tied_defs(Instruction* instr)
        instr->opcode == aco_opcode::v_fmac_legacy_f32 ||
        instr->opcode == aco_opcode::v_pk_fmac_f16 || instr->opcode == aco_opcode::v_writelane_b32 ||
        instr->opcode == aco_opcode::v_writelane_b32_e64 ||
-       instr->opcode == aco_opcode::v_dot4c_i32_i8 || instr->opcode == aco_opcode::s_fmac_f32 ||
+       instr->opcode == aco_opcode::v_dot4c_i32_i8 ||
+       instr->opcode == aco_opcode::v_dot2c_f32_f16 || instr->opcode == aco_opcode::s_fmac_f32 ||
        instr->opcode == aco_opcode::s_fmac_f16) {
       ops.push_back(2);
    } else if (instr->opcode == aco_opcode::s_addk_i32 || instr->opcode == aco_opcode::s_mulk_i32 ||
diff --git a/src/amd/compiler/aco_register_allocation.cpp b/src/amd/compiler/aco_register_allocation.cpp
index 0c38ede575e..c66d40a58de 100644
--- a/src/amd/compiler/aco_register_allocation.cpp
+++ b/src/amd/compiler/aco_register_allocation.cpp
@@ -3127,6 +3127,10 @@ vop3_can_use_vop2acc(ra_ctx& ctx, Instruction* instr)
       if (!ctx.program->dev.has_fmac_legacy32)
          return false;
       break;
+   case aco_opcode::v_dot2_f32_f16:
+      if (ctx.program->gfx_level < GFX10 || ctx.program->gfx_level >= GFX12)
+         return false;
+      break;
    default: return false;
    }
 
@@ -3537,6 +3541,7 @@ optimize_encoding_vop2(ra_ctx& ctx, RegisterFile& register_file, aco_ptr<Instruc
    case aco_opcode::v_dot4_i32_i8: instr->opcode = aco_opcode::v_dot4c_i32_i8; break;
    case aco_opcode::v_mad_legacy_f32: instr->opcode = aco_opcode::v_mac_legacy_f32; break;
    case aco_opcode::v_fma_legacy_f32: instr->opcode = aco_opcode::v_fmac_legacy_f32; break;
+   case aco_opcode::v_dot2_f32_f16: instr->opcode = aco_opcode::v_dot2c_f32_f16; break;
    default: break;
    }
 }