Auto-generate scalar versions of DWCONV2D CHW 3x3s2p1 micro-kernels
PiperOrigin-RevId: 338962809
diff --git a/src/f32-dwconv2d-chw/gen/3x3s2p1-minmax-scalar-2x1.c b/src/f32-dwconv2d-chw/gen/3x3s2p1-minmax-scalar-2x1.c
new file mode 100644
index 0000000..1e7df0d
--- /dev/null
+++ b/src/f32-dwconv2d-chw/gen/3x3s2p1-minmax-scalar-2x1.c
@@ -0,0 +1,182 @@
+// Auto-generated file. Do not edit!
+// Template: src/f32-dwconv2d-chw/3x3s2p1-scalar.c.in
+// Generator: tools/xngen
+//
+// Copyright 2020 Google LLC
+//
+// This source code is licensed under the BSD-style license found in the
+// LICENSE file in the root directory of this source tree.
+
+#include <assert.h>
+
+#include <xnnpack/dwconv.h>
+#include <xnnpack/math.h>
+
+
+void xnn_f32_dwconv2d_chw_ukernel_3x3s2p1__scalar_2x1(
+ size_t input_height,
+ size_t input_width,
+ const float* input,
+ const float* weights,
+ const float* zero,
+ float* output,
+ uint32_t padding_top,
+ const union xnn_f32_chw_params params[restrict XNN_MIN_ELEMENTS(1)])
+{
+ assert(input_height != 0);
+ assert(input_width != 0);
+ assert(input_width % sizeof(float) == 0);
+ assert(padding_top >= 0);
+ assert(padding_top <= 1);
+
+ const float vmin = params->scalar.min;
+ const float vmax = params->scalar.max;
+
+ const float vbias = weights[0];
+ const float vk00 = weights[1];
+ const float vk01 = weights[2];
+ const float vk02 = weights[3];
+ const float vk10 = weights[4];
+ const float vk11 = weights[5];
+ const float vk12 = weights[6];
+ const float vk20 = weights[7];
+ const float vk21 = weights[8];
+ const float vk22 = weights[9];
+
+ const size_t output_width = round_down_po2((input_width + (2 /* padding */ - 3 /* kernel size */ + 2 /* subsampling */) * sizeof(float)) / 2, sizeof(float));
+
+ const float* i0 = (const float*) ((uintptr_t) input - ((-padding_top) & input_width));
+ const float* i1 = (const float*) ((uintptr_t) i0 + input_width);
+ if XNN_UNPREDICTABLE(padding_top != 0) {
+ i0 = zero;
+ }
+ const float* i2 = (const float*) ((uintptr_t) i1 + input_width);
+ const float* i3 = (const float*) ((uintptr_t) i2 + input_width);
+ const float* i4 = (const float*) ((uintptr_t) i3 + input_width);
+
+ float* o0 = output;
+ float* o1 = (float*) ((uintptr_t) o0 + output_width);
+
+ size_t padded_input_height = input_height + padding_top + 1 /* padding bottom */;
+ size_t output_height = (padded_input_height - 3 /* kernel size */ + 2 /* subsampling */) / 2;
+ do {
+ if XNN_UNPREDICTABLE(padded_input_height < 4) {
+ i2 = zero;
+ }
+ if XNN_UNPREDICTABLE(padded_input_height < 5) {
+ i3 = zero;
+ o1 = o0;
+ }
+ if XNN_UNPREDICTABLE(padded_input_height < 6) {
+ i4 = zero;
+ }
+
+ float vi0x0 = 0.0f;
+ float vi1x0 = 0.0f;
+ float vi2x0 = 0.0f;
+ float vi3x0 = 0.0f;
+ float vi4x0 = 0.0f;
+
+ size_t w = input_width;
+ for (; w >= 2 * sizeof(float); w -= 2 * sizeof(float)) {
+ const float vi0x1 = i0[0];
+ const float vi1x1 = i1[0];
+ const float vi2x1 = i2[0];
+ const float vi3x1 = i3[0];
+ const float vi4x1 = i4[0];
+
+ float vo0p0 = vbias + vi0x0 * vk00;
+ float vo1p0 = vbias + vi2x0 * vk00;
+ vo0p0 += vi1x0 * vk10;
+ vo1p0 += vi3x0 * vk10;
+ vo0p0 += vi2x0 * vk20;
+ vo1p0 += vi4x0 * vk20;
+
+ const float vi0x2 = i0[1];
+ i0 += 2;
+ const float vi1x2 = i1[1];
+ i1 += 2;
+ const float vi2x2 = i2[1];
+ i2 += 2;
+ const float vi3x2 = i3[1];
+ i3 += 2;
+ const float vi4x2 = i4[1];
+ i4 += 2;
+
+ vo0p0 += vi0x1 * vk01;
+ vo1p0 += vi2x1 * vk01;
+ vo0p0 += vi1x1 * vk11;
+ vo1p0 += vi3x1 * vk11;
+ vo0p0 += vi2x1 * vk21;
+ vo1p0 += vi4x1 * vk21;
+
+ vi0x0 = vi0x2;
+ vi1x0 = vi1x2;
+ vi2x0 = vi2x2;
+ vi3x0 = vi3x2;
+ vi4x0 = vi4x2;
+
+ vo0p0 += vi0x2 * vk02;
+ vo1p0 += vi2x2 * vk02;
+ vo0p0 += vi1x2 * vk12;
+ vo1p0 += vi3x2 * vk12;
+ vo0p0 += vi2x2 * vk22;
+ vo1p0 += vi4x2 * vk22;
+
+
+ float vo0 = math_max_f32(vo0p0, vmin);
+ float vo1 = math_max_f32(vo1p0, vmin);
+
+ vo0 = math_min_f32(vo0, vmax);
+ vo1 = math_min_f32(vo1, vmax);
+
+ *o1++ = vo1;
+ *o0++ = vo0;
+ }
+ // Potentially process the last pixel.
+ assert(w <= 1 * sizeof(float));
+ if (w != 0) {
+ const float vi0x1 = *i0++;
+ const float vi1x1 = *i1++;
+ const float vi2x1 = *i2++;
+ const float vi3x1 = *i3++;
+ const float vi4x1 = *i4++;
+
+ float vo0p0 = vbias + vi0x0 * vk00;
+ float vo1p0 = vbias + vi2x0 * vk00;
+ vo0p0 += vi1x0 * vk10;
+ vo1p0 += vi3x0 * vk10;
+ vo0p0 += vi2x0 * vk20;
+ vo1p0 += vi4x0 * vk20;
+
+ vo0p0 += vi0x1 * vk01;
+ vo1p0 += vi2x1 * vk01;
+ vo0p0 += vi1x1 * vk11;
+ vo1p0 += vi3x1 * vk11;
+ vo0p0 += vi2x1 * vk21;
+ vo1p0 += vi4x1 * vk21;
+
+
+ float vo0 = math_max_f32(vo0p0, vmin);
+ float vo1 = math_max_f32(vo1p0, vmin);
+
+ vo0 = math_min_f32(vo0, vmax);
+ vo1 = math_min_f32(vo1, vmax);
+
+ *o1++ = vo1;
+ *o0++ = vo0;
+ }
+
+ i0 = (const float*) ((uintptr_t) i3);
+ i1 = (const float*) ((uintptr_t) i4);
+ i2 = (const float*) ((uintptr_t) i1 + input_width);
+ i3 = (const float*) ((uintptr_t) i2 + input_width);
+ i4 = (const float*) ((uintptr_t) i3 + input_width);
+
+ o0 = o1;
+ o1 = (float*) ((uintptr_t) o0 + output_width);
+
+ output_height = doz(output_height, 2);
+ padded_input_height = doz(padded_input_height, 4);
+ } while (output_height != 0);
+}