Add BitNet 1.58-bit ternary model support

CMakeLists.txt

@@ -34,10 +34,55 @@ FetchContent_Declare(
     mlx
     # Repo + branch — always build against the latest ROCm backend work.
     GIT_REPOSITORY https://github.com/NripeshN/mlx.git
-    GIT_TAG        rocm-support
+    GIT_TAG 6abf0b7e # rocm-support (pinned working ExecUpdate commit)
     GIT_SHALLOW    FALSE
 )
-FetchContent_MakeAvailable(mlx)
+# Fetch MLX, apply local patches, then add it. Patching must happen before
+# add_subdirectory()/FetchContent_MakeAvailable so CMakeLists.txt changes (for
+# example removing unsupported ROCm clang flags) affect generated build files.
+FetchContent_GetProperties(mlx)
+if(NOT mlx_POPULATED)
+    FetchContent_Populate(mlx)
+endif()
+set(MLX_SOURCE_DIR "${mlx_SOURCE_DIR}")
+
+if(MLX_BUILD_ROCM AND MLX_SOURCE_DIR AND EXISTS "${CMAKE_CURRENT_SOURCE_DIR}/patches/mlx-rocm-build.patch")
+        execute_process(
+            COMMAND git apply --check "${CMAKE_CURRENT_SOURCE_DIR}/patches/mlx-rocm-build.patch"
+            WORKING_DIRECTORY "${MLX_SOURCE_DIR}"
+            RESULT_VARIABLE PATCH_CHECK_RESULT
+            ERROR_QUIET
+            OUTPUT_QUIET
+        )
+        if(PATCH_CHECK_RESULT EQUAL 0)
+            message(STATUS "Applying mlx-rocm-build.patch...")
+            execute_process(
+                COMMAND git apply "${CMAKE_CURRENT_SOURCE_DIR}/patches/mlx-rocm-build.patch"
+                WORKING_DIRECTORY "${MLX_SOURCE_DIR}"
+                RESULT_VARIABLE PATCH_RESULT
+            )
+            if(PATCH_RESULT EQUAL 0)
+                message(STATUS "Patch applied successfully")
+            else()
+                message(FATAL_ERROR "Failed to apply mlx-rocm-build.patch")
+            endif()
+        else()
+            execute_process(
+                COMMAND git apply --reverse --check "${CMAKE_CURRENT_SOURCE_DIR}/patches/mlx-rocm-build.patch"
+                WORKING_DIRECTORY "${MLX_SOURCE_DIR}"
+                RESULT_VARIABLE PATCH_REVERSE_CHECK_RESULT
+                ERROR_QUIET
+                OUTPUT_QUIET
+            )
+            if(PATCH_REVERSE_CHECK_RESULT EQUAL 0)
+                message(STATUS "mlx-rocm-build.patch already applied, skipping")
+            else()
+                message(FATAL_ERROR "mlx-rocm-build.patch does not apply to fetched MLX source")
+            endif()
+        endif()
+endif()
+
+add_subdirectory("${mlx_SOURCE_DIR}" "${mlx_BINARY_DIR}")
 
 # nlohmann/json (MLX may already provide this)
 if(NOT TARGET nlohmann_json::nlohmann_json)
@@ -113,6 +158,8 @@ add_library(mlx-lm-common
     src/common/base_config.cpp
     src/common/hub_api.cpp
     src/common/safetensors.cpp
+    src/common/gguf_loader.cpp
+    src/common/registry.cpp
     src/common/switch_layers.cpp
     src/common/ssm_utils.cpp
     src/common/rope_utils.cpp
@@ -135,6 +182,11 @@ target_link_libraries(mlx-lm-common PUBLIC
     tokenizers_cpp
 )
 target_include_directories(mlx-lm-common PUBLIC ${minja_SOURCE_DIR}/include)
+# Patched minja headers (capitalize filter, etc.) take precedence over the
+# upstream minja version fetched by FetchContent.
+target_include_directories(mlx-lm-common BEFORE PRIVATE
+    ${CMAKE_CURRENT_SOURCE_DIR}/src/common/patched
+)
 
 # Propagate ROCm flag as compile definition so C++ code can use #if defined(MLX_BUILD_ROCM)
 if(MLX_BUILD_ROCM)
@@ -188,6 +240,7 @@ add_library(mlx-lm-llm
     src/llm/models/lfm2.cpp
     src/llm/models/nemotron_h.cpp
     src/llm/models/granite_moe_hybrid.cpp
+    src/llm/models/bitnet.cpp
 )
 target_link_libraries(mlx-lm-llm PUBLIC mlx-lm-common)
 
@@ -223,6 +276,33 @@ target_link_libraries(mlx-lm-vlm PUBLIC mlx-lm-common)
 # stb include path (header-only)
 target_include_directories(mlx-lm-common PUBLIC ${stb_SOURCE_DIR})
 
+# NPU backend (optional, requires XRT)
+# NPU backend (optional, requires IRON Python stack + XRT)
+if(MLX_LM_BUILD_NPU)
+    # The NPU backend uses the IRON JIT via Python subprocess.
+    # Install IRON: pip install mlir-aie
+    # Set NPU_INSTALL_DIR to the mlir-aie installation prefix.
+
+    # Copy JIT helper to build directory
+    configure_file(
+        src/npu/npu_jit.py
+        ${CMAKE_BINARY_DIR}/bin/npu_jit.py
+        COPYONLY
+    )
+
+    add_library(mlx-lm-npu STATIC
+        src/npu/npu_backend.cpp
+    )
+    target_include_directories(mlx-lm-npu PUBLIC
+        $<BUILD_INTERFACE:${CMAKE_CURRENT_SOURCE_DIR}/include>
+    )
+    target_compile_definitions(mlx-lm-npu PUBLIC
+        MLX_BUILD_NPU
+        NPU_INSTALL_DIR="${CMAKE_BINARY_DIR}"
+    )
+    message(STATUS "NPU backend enabled (JIT path)")
+endif()
+
 if(MLX_LM_BUILD_EXAMPLES)
     add_executable(chat examples/chat.cpp)
     target_link_libraries(chat PRIVATE mlx-lm-llm mlx-lm-common mlx-lm-core)
@@ -231,6 +311,10 @@ if(MLX_LM_BUILD_EXAMPLES)
         target_compile_definitions(chat PRIVATE MLX_BUILD_ROCM)
         target_link_libraries(chat PRIVATE hip::host)
     endif()
+    if(MLX_LM_BUILD_NPU AND TARGET mlx-lm-npu)
+        target_link_libraries(chat PRIVATE mlx-lm-npu)
+        target_compile_definitions(chat PRIVATE MLX_BUILD_NPU)
+    endif()
 
     add_executable(diagnose examples/diagnose.cpp)
     target_link_libraries(diagnose PRIVATE mlx-lm-llm mlx-lm-common mlx-lm-core)
@@ -258,6 +342,11 @@ if(MLX_LM_BUILD_EXAMPLES)
     add_executable(test_sdpa_ref examples/test_sdpa_ref.cpp)
     target_link_libraries(test_sdpa_ref PRIVATE mlx)
 
+    if(MLX_LM_BUILD_NPU AND TARGET mlx-lm-npu)
+        add_executable(test_npu examples/test_npu.cpp)
+        target_link_libraries(test_npu PRIVATE mlx-lm-npu)
+    endif()
+
     add_executable(server
         examples/server.cpp
         src/common/server.cpp

benchmark_all.sh

@@ -0,0 +1,72 @@
+#!/bin/bash
+# Comprehensive benchmark across all fixed models on Strix Halo (gfx1151)
+set -e
+
+export ROCm_DIR=/tmp/rocm_sdk_core
+source /tmp/rocm_venv/bin/activate
+export LD_LIBRARY_PATH=$ROCm_DIR/lib:$LD_LIBRARY_PATH
+
+CHAT=/home/bcloud/lemon-mlx-engine/build/chat
+MAX_TOKENS=100
+PROMPT="What is the capital of France? Explain in one sentence."
+
+echo "╔══════════════════════════════════════════════════════════════════════════╗"
+echo "║           BENCHMARK: lemon-mlx-engine on Strix Halo (gfx1151)           ║"
+echo "║           Commit 26aad7e — All fixes applied                           ║"
+echo "╚══════════════════════════════════════════════════════════════════════════╝"
+echo ""
+echo "Prompt: \"$PROMPT\""
+echo "Max tokens: $MAX_TOKENS, Temperature: 0.0 (greedy)"
+echo ""
+
+benchmark() {
+    local name="$1"
+    local model_path="$2"
+    shift 2
+    local extra_args="$@"
+
+    echo "──────────────────────────────────────────────────────────────────────────"
+    echo "▶ $name"
+    echo "  Path: $model_path"
+    [ -n "$extra_args" ] && echo "  Args: $extra_args"
+    echo ""
+
+    local output
+    output=$(echo "$PROMPT" | timeout 120 $CHAT "$model_path" --max-tokens $MAX_TOKENS --temperature 0.0 $extra_args 2>&1) || true
+
+    echo "$output" | grep -E "(Loading model|bound HIP|Model loaded|Prompt:|Generation:|Assistant:|Error|error|Fatal|Segmentation|Unsupported)" | head -10
+    echo ""
+}
+
+# 1. BASELINE: Llama-3.2-1B-Instruct-4bit
+benchmark "Llama-3.2-1B-Instruct-4bit (baseline)" /home/bcloud/models/llama-1b
+
+# 2. BitNet b1.58-2B-4T (1.58-bit ternary)
+benchmark "BitNet b1.58-2B-4T (1.58-bit ternary)" /home/bcloud/models/bitnet-2b
+
+# 3. Bonsai 1.7B (1-bit affine)
+benchmark "Bonsai 1.7B (1-bit)" /home/bcloud/models/bonsai-1.7b
+
+# 4. Bonsai 4B (1-bit affine)
+benchmark "Bonsai 4B (1-bit)" /home/bcloud/models/bonsai-4b
+
+# 5. Bonsai 8B (1-bit affine) — needs more VRAM
+benchmark "Bonsai 8B (1-bit)" /home/bcloud/models/bonsai-8b
+
+# 6. Qwen3-1.7B MXFP4 (issue #10 fix)
+benchmark "Qwen3-1.7B-MLX-MXFP4 (MXFP4 quant)" /home/bcloud/models/qwen3-1.7b-mxfp4
+
+# 7. OpenELM-3B (issue #7 segfault fix)
+benchmark "OpenELM-3B (issue #7 segfault fix)" /home/bcloud/models/openelm-3b --raw
+
+# 8. Granite-4.0-H-Tiny (issue #6 crash fix)
+benchmark "Granite-4.0-H-Tiny (issue #6 crash fix)" /home/bcloud/models/granite-4.0-h-tiny --raw
+
+# 9. Lille-130M (issue #9 dequant fix)
+benchmark "Lille-130M (issue #9 dequant fix)" /home/bcloud/models/lille-130m --raw
+
+# 10. Falcon-E-3B (1.58-bit, inverse-scale BitLinear)
+benchmark "Falcon-E-3B (1.58-bit, inverse-scale BitLinear)" /home/bcloud/models/falcon-e-3b
+
+echo "════════════════════════════════════════════════════════════════════════════"
+echo "Benchmark complete."