[MLAS] AArch64 SQNBitGemm CompInt8 initial multi-row implementation

cmake/onnxruntime_mlas.cmake

@@ -82,7 +82,10 @@ function(setup_mlas_source_for_windows)
         ${MLAS_SRC_DIR}/qgemm_kernel_neon.cpp
         ${MLAS_SRC_DIR}/qgemm_kernel_udot.cpp
         ${MLAS_SRC_DIR}/qgemm_kernel_sdot.cpp
+        ${MLAS_SRC_DIR}/sqnbitgemm_kernel_neon.h
         ${MLAS_SRC_DIR}/sqnbitgemm_kernel_neon.cpp
+        ${MLAS_SRC_DIR}/sqnbitgemm_kernel_neon_fp32.cpp
+        ${MLAS_SRC_DIR}/sqnbitgemm_kernel_neon_int8.cpp
       )
 
       set(mlas_platform_preprocess_srcs
@@ -350,9 +353,12 @@ else()
           ${MLAS_SRC_DIR}/qgemm_kernel_neon.cpp
           ${MLAS_SRC_DIR}/qgemm_kernel_udot.cpp
           ${MLAS_SRC_DIR}/qgemm_kernel_sdot.cpp
+          ${MLAS_SRC_DIR}/sqnbitgemm_kernel_neon.h
           ${MLAS_SRC_DIR}/sqnbitgemm_kernel_neon.cpp
+          ${MLAS_SRC_DIR}/sqnbitgemm_kernel_neon_fp32.cpp
+          ${MLAS_SRC_DIR}/sqnbitgemm_kernel_neon_int8.cpp
         )
-        set_source_files_properties(${MLAS_SRC_DIR}/sqnbitgemm_kernel_neon.cpp
+        set_source_files_properties(${MLAS_SRC_DIR}/sqnbitgemm_kernel_neon_int8.cpp
                                     PROPERTIES COMPILE_FLAGS " -march=armv8.2-a+dotprod")
         if (NOT APPLE)
           set(mlas_platform_srcs

onnxruntime/core/mlas/lib/sqnbitgemm.cpp

@@ -80,7 +80,7 @@ MlasIsSQNBitGemmAvailable(
                    Dispatch->Q4BitBlkDequantBForSgemm_CompFp32 != nullptr;
         }
         case SQNBitGemmVariant_BitWidth4_CompInt8: {
-            return Dispatch->SQ4BitGemmM1Kernel_CompInt8 != nullptr &&
+            return Dispatch->SQ4BitGemmKernel_CompInt8 != nullptr &&
                    Dispatch->QuantizeARow_CompInt8 != nullptr;
         }
         default: {
@@ -431,36 +431,6 @@ SQ4BitGemm_CompInt8(
 
     const float* Bias = (DataParams->Bias == nullptr) ? nullptr : DataParams->Bias + RangeStartN;
 
-    if (RangeCountM == 1) {
-        size_t CountN;
-        for (size_t n = 0; n < RangeCountN; n += CountN) {
-            CountN = std::min(RangeCountN - n, size_t{128});
-
-            const std::byte* a_row = QuantA;
-            const std::byte* b_col = QuantBData + n * ldb;
-            const float* b_col_scale = QuantBScale + n * k_blks;
-            const std::byte* b_col_zp =
-                (QuantBZeroPoint == nullptr) ? nullptr : QuantBZeroPoint + n * k_blks_zp_bytes;
-            float* c_blk = C + n;
-            const float* bias = (Bias == nullptr) ? nullptr : Bias + n;
-
-            GetMlasPlatform().SQNBitGemmDispatch->SQ4BitGemmM1Kernel_CompInt8(
-                BlkLen,
-                a_row, b_col, b_col_scale, b_col_zp, c_blk, CountN, K, k_blks, bias
-            );
-
-            if (DataParams->PostProcessor != nullptr) {
-                DataParams->PostProcessor->Process(
-                    DataParams->C, RangeStartM, RangeStartN + n,
-                    RangeCountM, CountN, ldc
-                );
-            }
-        }
-        return;
-    }
-
-    // This is a naive M > 1 implementation that repeatedly calls the M=1 kernel.
-    // TODO Replace it with an optimized implementation.
     size_t CountN;
     for (size_t n = 0; n < RangeCountN; n += CountN) {
         CountN = std::min(RangeCountN - n, size_t{128});
@@ -473,21 +443,23 @@ SQ4BitGemm_CompInt8(
         float* c_blk = C + n;
         const float* bias = (Bias == nullptr) ? nullptr : Bias + n;
 
-        for (size_t m = 0; m < RangeCountM; ++m) {
-            GetMlasPlatform().SQNBitGemmDispatch->SQ4BitGemmM1Kernel_CompInt8(
+        for (size_t m = 0; m < RangeCountM;) {
+            const auto RowsHandled = GetMlasPlatform().SQNBitGemmDispatch->SQ4BitGemmKernel_CompInt8(
                 BlkLen,
-                a_row, b_col, b_col_scale, b_col_zp, c_blk, CountN, K, k_blks, bias
+                a_row, b_col, b_col_scale, b_col_zp, c_blk, RangeCountM - m, CountN, K, k_blks, ldc, bias
             );
 
             if (DataParams->PostProcessor != nullptr) {
                 DataParams->PostProcessor->Process(
                     DataParams->C, RangeStartM, RangeStartN + n,
-                    RangeCountM, CountN, ldc
+                    RangeCountM - m, CountN, ldc
                 );
             }
 
-            c_blk += ldc;
-            a_row += lda;
+            c_blk += RowsHandled * ldc;
+            a_row += RowsHandled * lda;
+
+            m += RowsHandled;
         }
     }
 }

onnxruntime/core/mlas/lib/sqnbitgemm.h

@@ -181,10 +181,9 @@ struct MLAS_SQNBIT_GEMM_DISPATCH {
     // CompInt8 kernel function prototypes.
     //
 
-    /**
+        /**
      * @brief Multiply quantized 8-bit integer matrix A with quantized 4-bit integer matrix B.
      *        A and B are block quantized and B is column major.
-     *        This kernel handles the special case where M, the number of rows of A and C, is 1.
      *
      * @param       BlkLen              Number of values in a block.
      * @param       QuantA              Supplies the quantized A matrix.
@@ -193,25 +192,31 @@ struct MLAS_SQNBIT_GEMM_DISPATCH {
      * @param       QuantBScale         Supplies the quantized B matrix block scale values.
      * @param       QuantBZeroPoint     Supplies the quantized B matrix block zero point values. Optional.
      * @param[out]  C                   Supplies the output C matrix.
-     * @param       CountN              Number of columns of B and C.
+     * @param       CountM              Number of rows of A and C to process, an upper bound.
+     * @param       CountN              Number of columns of B and C to process.
      * @param       CountK              Number of columns of A and rows of B.
-     * @param       BlockStrideQuantB   Number of blocks between adjacent columns of the quantized B matrix.
+     * @param       BlockCountK         Number of blocks in one row of A and one column of B.
+     * @param       ldc                 Number of elements between adjacent rows of C.
      * @param       Bias                Bias vector of length N.
+     *
+     * @return                          The number of rows of A and C that were processed, at most CountM.
      */
-    typedef void(SQ4BitGemmM1Kernel_CompInt8_Fn)(
+    typedef size_t(SQ4BitGemmKernel_CompInt8_Fn)(
         size_t BlkLen,
         const std::byte* QuantA,
         const std::byte* QuantBData,
         const float* QuantBScale,
         const std::byte* QuantBZeroPoint,
         float* C,
+        size_t CountM,
         size_t CountN,
         size_t CountK,
-        size_t BlockStrideQuantB,
+        size_t BlockCountK,
+        size_t ldc,
         const float* Bias
     );
 
-    SQ4BitGemmM1Kernel_CompInt8_Fn* SQ4BitGemmM1Kernel_CompInt8 = nullptr;
+    SQ4BitGemmKernel_CompInt8_Fn* SQ4BitGemmKernel_CompInt8 = nullptr;
 
     /**
      * @brief Block quantize values from one row of matrix A from floats to quantized 8-bit integers.

onnxruntime/core/mlas/lib/sqnbitgemm_kernel_avx2.cpp

@@ -434,6 +434,44 @@ SQ4BitGemmM1Kernel_CompInt8_avx2(
     }
 }
 
+size_t
+SQ4BitGemmKernel_CompInt8_avx2(
+    size_t BlkLen,
+    const std::byte* QuantA,
+    const std::byte* QuantBData,
+    const float* QuantBScale,
+    const std::byte* QuantBZeroPoint,
+    float* C,
+    size_t CountM,
+    size_t CountN,
+    size_t CountK,
+    size_t BlockCountK,
+    size_t ldc,
+    const float* Bias
+)
+{
+    MLAS_UNREFERENCED_PARAMETER(ldc);
+
+    if (CountM == 0) {
+        return 0;
+    }
+
+    SQ4BitGemmM1Kernel_CompInt8_avx2(
+        BlkLen,
+        QuantA,
+        QuantBData,
+        QuantBScale,
+        QuantBZeroPoint,
+        C,
+        CountN,
+        CountK,
+        BlockCountK,
+        Bias
+    );
+
+    return 1;
+}
+
 template <size_t NCols, bool HasZeroPoint>
 MLAS_FORCEINLINE void
 ComputeDotProducts_BlkLen16_CompFp32_avx2(
@@ -1109,7 +1147,7 @@ const MLAS_SQNBIT_GEMM_DISPATCH MlasSQNBitGemmDispatchAvx2 = []() {
     d.SQ4BitGemmM1Kernel_CompFp32 = SQ4BitGemmM1Kernel_CompFp32_avx2;
     d.Q4BitBlkDequantBForSgemm_CompFp32 = Q4BitBlkDequantBForSgemm_CompFp32_avx2;
 
-    d.SQ4BitGemmM1Kernel_CompInt8 = SQ4BitGemmM1Kernel_CompInt8_avx2;
+    d.SQ4BitGemmKernel_CompInt8 = SQ4BitGemmKernel_CompInt8_avx2;
     d.QuantizeARow_CompInt8 = QuantizeARow_CompInt8_avx2;
 
     return d;

onnxruntime/core/mlas/lib/sqnbitgemm_kernel_avx512.cpp

@@ -239,7 +239,7 @@ const MLAS_SQNBIT_GEMM_DISPATCH MlasSQNBitGemmDispatchAvx512 = []() {
     d.SQ4BitGemmM1Kernel_CompFp32 = SQ4BitGemmM1Kernel_CompFp32_avx512;
     d.Q4BitBlkDequantBForSgemm_CompFp32 = Q4BitBlkDequantBForSgemm_CompFp32_avx2;
 
-    d.SQ4BitGemmM1Kernel_CompInt8 = SQ4BitGemmM1Kernel_CompInt8_avx2;
+    d.SQ4BitGemmKernel_CompInt8 = SQ4BitGemmKernel_CompInt8_avx2;
     d.QuantizeARow_CompInt8 = QuantizeARow_CompInt8_avx512;
 
     return d;

onnxruntime/core/mlas/lib/sqnbitgemm_kernel_avx512vnni.cpp

@@ -237,6 +237,44 @@ SQ4BitGemmM1Kernel_CompInt8_avx512vnni(
     }
 }
 
+size_t
+SQ4BitGemmKernel_CompInt8_avx512vnni(
+    size_t BlkLen,
+    const std::byte* QuantA,
+    const std::byte* QuantBData,
+    const float* QuantBScale,
+    const std::byte* QuantBZeroPoint,
+    float* C,
+    size_t CountM,
+    size_t CountN,
+    size_t CountK,
+    size_t BlockCountK,
+    size_t ldc,
+    const float* Bias
+)
+{
+    MLAS_UNREFERENCED_PARAMETER(ldc);
+
+    if (CountM == 0) {
+        return 0;
+    }
+
+    SQ4BitGemmM1Kernel_CompInt8_avx512vnni(
+        BlkLen,
+        QuantA,
+        QuantBData,
+        QuantBScale,
+        QuantBZeroPoint,
+        C,
+        CountN,
+        CountK,
+        BlockCountK,
+        Bias
+    );
+
+    return 1;
+}
+
 void MLASCALL
 MlasQ80BlkQuantRow_avx512(
     size_t BlkLen,
@@ -260,7 +298,7 @@ const MLAS_SQNBIT_GEMM_DISPATCH MlasSQNBitGemmDispatchAvx512vnni = []() {
     d.SQ4BitGemmM1Kernel_CompFp32 = SQ4BitGemmM1Kernel_CompFp32;
     d.Q4BitBlkDequantBForSgemm_CompFp32 = Q4BitBlkDequantBForSgemm_CompFp32_avx2;
 
-    d.SQ4BitGemmM1Kernel_CompInt8 = SQ4BitGemmM1Kernel_CompInt8_avx512vnni;
+    d.SQ4BitGemmKernel_CompInt8 = SQ4BitGemmKernel_CompInt8_avx512vnni;
     d.QuantizeARow_CompInt8 = MlasQ80BlkQuantRow_avx512;
 
     return d;

onnxruntime/core/mlas/lib/sqnbitgemm_kernel_avx_common.h

@@ -158,17 +158,19 @@ Q4BitBlkDequantBForSgemm_CompFp32_avx2(
     const size_t BlockStrideQuantB
 );
 
-void
-SQ4BitGemmM1Kernel_CompInt8_avx2(
+size_t
+SQ4BitGemmKernel_CompInt8_avx2(
     size_t BlkLen,
     const std::byte* QuantA,
     const std::byte* QuantBData,
     const float* QuantBScale,
     const std::byte* QuantBZeroPoint,
     float* C,
+    size_t CountM,
     size_t CountN,
     size_t CountK,
-    size_t BlockStrideQuantB,
+    size_t BlockCountK,
+    size_t ldc,
     const float* Bias
 );