enable int8 kernel on arm32

mindspore/lite/nnacl/assembly/arm32/IndirectGemmInt8_2x4.S

@@ -9,8 +9,8 @@
 #endif
 
 // void IndirectGemmInt8_2x4(int8_t *output, int8_t *input, int8_t *weight, int32_t *bias, size_t ksize, size_t ic4,
-// size_t oc, size_t offset, int32_t *input_sum, size_t act_min, size_t act_max, size_t out_zp, size_t out_multiplier,
-// size_t shift_before, size_t shift_after);
+// size_t oc, size_t offset, int32_t *input_sum, size_t act_min, size_t act_max, size_t out_zp, int32_t *out_multiplier,
+// int32_t *shift_before, int32_t *shift_after, size_t asymmetric, size_t per_channel, size_t per_channel_offset);
 // r0: output, r1: input, r2: weight, r3: bias, r4: kSize, r5: ic4, r6: oc, r7: offset
 // r8: input_sum, r10: act_min, r11: act_max, r10: out_zp, r11: out_multiplier, r10: shift_before, r11: shift_after
 IndirectGemmInt8_2x4:
@@ -24,7 +24,7 @@ IndirectGemmInt8_2x4:
         veor q15, q15, q15
     .endm
 
-       // at return, clang generates "push {lr}, pop {pc}"" while gcc will generate "bx lr"
+    // at return, clang generates "push {lr}, pop {pc}"" while gcc will generate "bx lr"
     // according to https://stackoverflow.com/questions/53625807
     // even if we jump to link register instead of saving it, we still have to save it in subroutine calls anyway
     // clang's rule seems more simple, though there are no subroutine calls here
@@ -127,10 +127,6 @@ IndirectGemmInt8_2x4:
                 vpadal.s16 q14, q6
                 vpadal.s16 q15, q7
 
-                // load sum
-                ldr r10, [sp, #16]
-                vld1.32 q0[], [r10]!
-                vld1.32 q1[], [r10]!
                 // pairwise add
                 vpadd.i32 d16, d16, d17
                 vpadd.i32 d18, d18, d19
@@ -145,8 +141,27 @@ IndirectGemmInt8_2x4:
                 vpadd.i32 d17, d20, d22
                 vpadd.i32 d24, d24, d26
                 vpadd.i32 d25, d28, d30
+
+                // load sum
+                ldr lr, [sp, #44]
+                cmp lr, #0
+                beq NoSum
+                ldr r10, [sp, #16]
+                ldr lr, [sp, #48]
+                cmp lr, #0
+                beq SymSum
+                ldr lr, [sp, #52]
+                vld1.32 q0, [r10]
+                add r10, r10, lr
+                vld1.32 q1, [r10]
+                b AddSum
+            SymSum:
+                vld1.32 q0[], [r10]!
+                vld1.32 q1[], [r10]!
+            AddSum:
                 vsub.i32 q8, q8, q0
                 vsub.i32 q12, q12, q1
+            NoSum:
                 cmp r3, #0
                 beq NoBias
                 vld1.32 q2, [r3]
@@ -154,18 +169,30 @@ IndirectGemmInt8_2x4:
                 vadd.i32 q12, q12, q2
 
             NoBias:
-                ldr r10, [sp, #36]
-                vdup.32 q3, r10
+                ldr lr, [sp, #48]
+                cmp lr, #0
+                bne PerChannel
+                ldr lr, [sp, #36]
+                vld1.32 q3[], [lr]
+                ldr lr, [sp, #32]
+                vld1.32 q4[], [lr]
+                ldr lr, [sp, #40]
+                vld1.32 q5[], [lr]
+                b QuantizeStart
+            PerChannel:
+                ldr lr, [sp, #36]
+                vld1.32 q3, [lr]
+                ldr lr, [sp, #32]
+                vld1.32 q4, [lr]
+                ldr lr, [sp, #40]
+                vld1.32 q5, [lr]
+            QuantizeStart:
                 vshl.s32 q8, q8, q3
                 vshl.s32 q12, q12, q3
 
-                ldr r10, [sp, #32]
-                vdup.32 q4, r10
                 vqrdmulh.s32 q8, q8, q4
                 vqrdmulh.s32 q12, q12, q4
 
-                ldr r10, [sp, #40]
-                vdup.32 q5, r10
                 vand q3, q5, q8
                 vshr.s32 q3, q3, #31
                 vqadd.s32 q8, q8, q3
@@ -192,7 +219,7 @@ IndirectGemmInt8_2x4:
 
                 vqmovn.s32 d30, q8
                 vqmovn.s32 d31, q12
-                vqmovn.s16 d0, q14
+                vqmovn.s16 d0, q15
 
             // prefetching is not prefered while writing results in spite of cache missings
             // you could try prfm pstl2strm
@@ -234,6 +261,26 @@ IndirectGemmInt8_2x4:
 
         cmp r6, #4
         ble LoopOcEnd
+        ldr lr, [sp, #48]
+        cmp lr, #0
+        beq NoChannelForward
+        ldr lr, [sp, #44]
+        cmp lr, #0
+        beq NoSumForward
+        ldr lr, [sp, #16]
+        add lr, lr, #16
+        str lr, [sp, #16]
+    NoSumForward:
+        ldr lr, [sp, #36]
+        add lr, lr, #16
+        str lr, [sp, #36]
+        ldr lr, [sp, #32]
+        add lr, lr, #16
+        str lr, [sp, #32]
+        ldr lr, [sp, #40]
+        add lr, lr, #16
+        str lr, [sp, #40]
+    NoChannelForward:
         sub r6, r6, #4
         cmp r3, #0
         beq NoStepFowrard

mindspore/lite/nnacl/assembly/arm64/IndirectGemmInt8_4x4.S

@@ -8,8 +8,8 @@
 #endif
 
 // void IndirectGemmInt8_4x4(int8_t *output, int8_t *input, int8_t *weight, int32_t *bias, size_t ksize, size_t ic4,
-// size_t oc, size_t offset, int32_t *input_sum, size_t act_min, size_t act_max, size_t out_zp,
-// int32_t *out_multiplier, int32_t *shift_before, int32_t *shift_after, size_t asymmetric, size_t per_channel);
+// size_t oc, size_t offset, int32_t *input_sum, size_t act_min, size_t act_max, size_t out_zp, int32_t *out_multiplier,
+// int32_t *shift_before, int32_t *shift_after, size_t asymmetric, size_t per_channel, size_t per_channel_offset);
 // x0: output, x1: input, x2: weight, x3: bias, x4: kSize, x5: ic4, x6: oc, x7: offset
 IndirectGemmInt8_4x4:
 
@@ -52,10 +52,7 @@ IndirectGemmInt8_4x4:
     ldr x19, [sp, #48]
     ldr x20, [sp, #56]
     ldr x21, [sp, #64]
-
-    add x24, x6, #3
-    mov x23, #4
-    sdiv x23, x24, x23
+    ldr x23, [sp, #72]
 
     mul x5, x4, x5
     mov x4, #1
@@ -218,10 +215,10 @@ IndirectGemmInt8_4x4:
                 // load sum
                 mov x22, x15
                 cbz x21, SymSum
-                ld1r {v8.4s}, [x22], x23
-                ld1r {v9.4s}, [x22], x23
-                ld1r {v10.4s}, [x22], x23
-                ld1r {v11.4s}, [x22]
+                ld1 {v8.4s}, [x22], x23
+                ld1 {v9.4s}, [x22], x23
+                ld1 {v10.4s}, [x22], x23
+                ld1 {v11.4s}, [x22]
                 b AddSum
             SymSum:
                 ld1r {v8.4s}, [x22], #4

mindspore/lite/nnacl/assembly/opt/IndirectGemmInt8_24x4_dp.S

@@ -9,7 +9,7 @@
 
 // void IndirectGemmInt8_24x4_dp(int8_t *output, int8_t *input, int8_t *weight, int32_t *bias, size_t ksize, size_t ic4,
 // size_t oc, size_t offset, int32_t *input_sum, size_t act_min, size_t act_max, size_t out_zp, int32_t *out_multiplier,
-// int32_t *shift_before, int32_t *shift_after);
+// int32_t *shift_before, int32_t *shift_after, size_t asymmetric, size_t per_channel, size_t per_channel_offset);
 // x0: output, x1: input, x2: weight, x3: bias, x4: kSize, x5: ic4, x6: oc, x7: offset
 // we use sdot intrinsic on cores that supports dotprod(Armv8.2-A w/dp or later)
 // mrs intrinsic could read system register ID_AA64ISAR0_EL1(or s3_0_c0_c6_0 on Armv8.2-A)
@@ -148,10 +148,7 @@ IndirectGemmInt8_24x4_dp:
     ldr x19, [sp, #48]
     ldr x20, [sp, #56]
     ldr x21, [sp, #64]
-
-    add x24, x6, #3
-    mov x23, #4
-    sdiv x23, x24, x23
+    ldr x23, [sp, #72]
 
     mul x5, x4, x5
     mov x4, #1

mindspore/lite/nnacl/int8/common_func.h

@@ -37,18 +37,25 @@ void ConvDwInt8Row(int32_t *output_ptr, const int8_t *input_ptr, const int16_t *
                    int output_channel, int input_step, int8_t input_zp);
 void ConvDwInt8PostAlign4(int8_t *dst, int32_t *buffer, int num_pixels, int32_t output_zp, int32_t out_multiplier,
                           int32_t left_shift, int32_t right_shift, int32_t acc_min, int32_t acc_max);
+void IndirectGemmInt16to32_8x4(int32_t *dst, const int16_t *src, const int16_t *weight, size_t ksize, size_t ic8,
+                               size_t oc4, size_t offset);
+#endif
+
+#ifdef ENABLE_ARM32
+void IndirectGemmInt8_2x4(int8_t *output, const int8_t *input, const int8_t *weight, const int32_t *bias, size_t ksize,
+                          size_t ic4, size_t oc, size_t offset, const int32_t *input_sum, size_t act_min,
+                          size_t act_max, size_t out_zp, int32_t *out_multiplier, int32_t *shift_before,
+                          int32_t *shift_after, size_t asymmetric, size_t per_channel, size_t per_channel_offset);
 #endif
 
 #ifdef ENABLE_ARM64
 void PostFuncInt8C4Neon64(const int32_t *in, const int32_t *bias, int8_t *out, size_t oc4div, size_t oc4res,
                           size_t plane, size_t stride, int32_t multiplier, int32_t left_shift, int32_t right_shift,
                           int32_t zp, int32_t mini, int32_t maxi);
-void IndirectGemmInt16to32_8x4(int32_t *dst, const int16_t *src, const int16_t *weight, size_t ksize, size_t ic8,
-                               size_t oc4, size_t offset);
 void IndirectGemmInt8_4x4(int8_t *output, const int8_t *input, const int8_t *weight, const int32_t *bias, size_t ksize,
                           size_t ic4, size_t oc, size_t offset, const int32_t *input_sum, size_t act_min,
                           size_t act_max, size_t out_zp, int32_t *out_multiplier, int32_t *shift_before,
-                          int32_t *shift_after, size_t asymmetric, size_t per_channel);
+                          int32_t *shift_after, size_t asymmetric, size_t per_channel, size_t per_channel_offset);
 void DeconvDwInt8Center(int32_t *dst, const int16_t *src, const int16_t *weight, size_t height, size_t width,
                         size_t kernel_h, size_t kernel_w, size_t out_h_step, size_t block_channel, size_t in_sh_step,
                         size_t in_sw_step, size_t in_kh_step, size_t in_kw_step);

mindspore/lite/nnacl/int8/conv_int8.c

@@ -28,15 +28,21 @@ void IndirectGemmInt8(int8_t *dst, int32_t *tmp_dst, const int8_t *src, const in
   int32_t out_zp = conv_param->conv_quant_arg_.output_quant_args_[0].zp_;
   int32_t act_min = conv_param->conv_quant_arg_.out_act_min_[0];
   int32_t act_max = conv_param->conv_quant_arg_.out_act_max_[0];
+  int oc4 = UP_DIV(output_channel, C4NUM);
 
 #ifdef ENABLE_ARM64
   size_t asymmetric = conv_param->conv_quant_arg_.asymmetric_ & FILTER_ASYMMETRIC;
   size_t per_channel = conv_param->conv_quant_arg_.per_channel_ & FILTER_PER_CHANNEL;
   IndirectGemmInt8_4x4(dst, src, weight, bias, UP_DIV(kernel_plane, C4NUM), ic4, output_channel,
                        output_channel * sizeof(int8_t), input_sum, act_min, act_max, out_zp, out_multiplier,
-                       shift_before, shift_after, asymmetric, per_channel);
+                       shift_before, shift_after, asymmetric, per_channel, oc4 * C4NUM * sizeof(int32_t));
+#elif ENABLE_ARM32
+  size_t asymmetric = conv_param->conv_quant_arg_.asymmetric_ & FILTER_ASYMMETRIC;
+  size_t per_channel = conv_param->conv_quant_arg_.per_channel_ & FILTER_PER_CHANNEL;
+  IndirectGemmInt8_2x4(dst, src, weight, bias, UP_DIV(kernel_plane, C4NUM), ic4, output_channel,
+                       output_channel * sizeof(int8_t), input_sum, act_min, act_max, out_zp, out_multiplier,
+                       shift_before, shift_after, asymmetric, per_channel, oc4 * C4NUM * sizeof(int32_t));
 #else
-  int oc4 = UP_DIV(output_channel, C4NUM);
   int tile_num = conv_param->tile_num_;
   int plane_c4 = UP_DIV(kernel_plane, C4NUM);
   for (int oc = 0; oc < output_channel; oc++) {
@@ -201,7 +207,7 @@ void IndirectGemmInt8Opt(int8_t *dst, int32_t *tmp_dst, const int8_t *src, const
 
 void Conv3x3Int8Gemm(int32_t *dst, const int16_t *src, const int16_t *weight, int oc, int ic8, size_t real_cal_num) {
   int oc4 = UP_DIV(oc, C4NUM);
-#ifdef ENABLE_ARM64
+#ifdef ENABLE_ARM
   IndirectGemmInt16to32_8x4(dst, src, weight, 16, ic8, oc4, oc4 * 4 * 16 * sizeof(int32_t));
 #else
   const int input_unit_square = 16;

mindspore/lite/src/runtime/kernel/arm/int8/convolution_int8.cc

@@ -33,10 +33,10 @@ using mindspore::schema::PrimitiveType_Conv2D;
 namespace mindspore::kernel {
 void ConvolutionInt8CPUKernel::CheckSupportOptimize() {
   tile_num_ = 24;
-  // #ifdef ENABLE_ARM32
-  //   tile_num_ = 2;
-  //   support_optimize_ = false;
-  // #endif
+#ifdef ENABLE_ARM32
+  tile_num_ = 2;
+  support_optimize_ = false;
+#endif
 
 #ifdef ENABLE_ARM64
   void *optimize_op_handler = OptimizeModule::GetInstance()->optimized_op_handler_;
@@ -380,7 +380,11 @@ kernel::LiteKernel *CpuConvInt8KernelCreator(const std::vector<lite::Tensor *> &
   int dilation_w = conv_param->dilation_w_;
   kernel::LiteKernel *kernel;
   if (kernel_h == 3 && kernel_w == 3 && stride_h == 1 && stride_w == 1 && dilation_h == 1 && dilation_w == 1) {
+#ifdef ENABLE_ARM32
+    kernel = new (std::nothrow) kernel::Convolution3x3Int8CPUKernel(opParameter, inputs, outputs, ctx, primitive);
+#else
     kernel = new (std::nothrow) kernel::ConvolutionInt8CPUKernel(opParameter, inputs, outputs, ctx, primitive);
+#endif
   } else if (kernel_h == 1 && kernel_w == 1) {
     kernel = new (std::nothrow) kernel::Convolution1x1Int8CPUKernel(opParameter, inputs, outputs, ctx, primitive);
   } else {