Scalar implementations of QC8 GEMM/IGEMM microkernels
PiperOrigin-RevId: 382316395
diff --git a/src/qc8-igemm/gen/2x2-minmax-fp32-scalar-lrint.c b/src/qc8-igemm/gen/2x2-minmax-fp32-scalar-lrint.c
new file mode 100644
index 0000000..d0cde5d
--- /dev/null
+++ b/src/qc8-igemm/gen/2x2-minmax-fp32-scalar-lrint.c
@@ -0,0 +1,143 @@
+// Auto-generated file. Do not edit!
+// Template: src/qs8-igemm/scalar.c.in
+// Generator: tools/xngen
+//
+// Copyright 2021 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 <math.h>
+
+#include <xnnpack/math.h>
+#include <xnnpack/gemm.h>
+
+
+void xnn_qc8_igemm_minmax_fp32_ukernel_2x2__scalar_lrint(
+ size_t mr,
+ size_t nc,
+ size_t kc,
+ size_t ks,
+ const int8_t**restrict a,
+ const void*restrict w,
+ int8_t*restrict c,
+ size_t cm_stride,
+ size_t cn_stride,
+ size_t a_offset,
+ const int8_t* zero,
+ const union xnn_qs8_minmax_params params[restrict XNN_MIN_ELEMENTS(1)])
+{
+ assert(mr != 0);
+ assert(mr <= 2);
+ assert(nc != 0);
+ assert(kc != 0);
+ assert(ks != 0);
+ assert(ks % (2 * sizeof(void*)) == 0);
+ assert(a != NULL);
+ assert(w != NULL);
+ assert(c != NULL);
+
+ int8_t* c0 = c;
+ int8_t* c1 = (int8_t*) ((uintptr_t) c0 + cm_stride);
+ if XNN_UNPREDICTABLE(mr != 2) {
+ c1 = c0;
+ }
+
+ do {
+ int32_t vacc0x0 = ((const int32_t*) w)[0];
+ int32_t vacc0x1 = ((const int32_t*) w)[1];
+ int32_t vacc1x0 = vacc0x0;
+ int32_t vacc1x1 = vacc0x1;
+ w = (const void*) ((uintptr_t) w + 2 * sizeof(int32_t));
+
+ size_t p = ks;
+ do {
+ const int8_t* restrict a0 = a[0];
+ assert(a0 != NULL);
+ if XNN_UNPREDICTABLE(a0 != zero) {
+ a0 = (const int8_t*) ((uintptr_t) a0 + a_offset);
+ }
+ const int8_t* restrict a1 = a[1];
+ assert(a1 != NULL);
+ if XNN_UNPREDICTABLE(a1 != zero) {
+ a1 = (const int8_t*) ((uintptr_t) a1 + a_offset);
+ }
+ a += 2;
+
+ size_t k = kc;
+ do {
+ const int32_t va0 = (int32_t) *a0++;
+ const int32_t va1 = (int32_t) *a1++;
+
+ const int32_t vb0 = ((const int8_t*) w)[0];
+ const int32_t vb1 = ((const int8_t*) w)[1];
+ w = (const void*) ((uintptr_t) w + 2 * sizeof(int8_t));
+
+ vacc0x0 += va0 * vb0;
+ vacc0x1 += va0 * vb1;
+ vacc1x0 += va1 * vb0;
+ vacc1x1 += va1 * vb1;
+
+ k -= sizeof(int8_t);
+ } while (k != 0);
+ p -= 2 * sizeof(void*);
+ } while (p != 0);
+
+ float vfpacc0x0 = (float) vacc0x0;
+ float vfpacc0x1 = (float) vacc0x1;
+ float vfpacc1x0 = (float) vacc1x0;
+ float vfpacc1x1 = (float) vacc1x1;
+
+ const float vscale0 = ((const float*) w)[0];
+ vfpacc0x0 *= vscale0;
+ vfpacc1x0 *= vscale0;
+ const float vscale1 = ((const float*) w)[1];
+ vfpacc0x1 *= vscale1;
+ vfpacc1x1 *= vscale1;
+ w = (const void*) ((const float*) w + 2);
+
+ long vrndacc0x0 = lrintf(vfpacc0x0);
+ long vrndacc0x1 = lrintf(vfpacc0x1);
+ long vrndacc1x0 = lrintf(vfpacc1x0);
+ long vrndacc1x1 = lrintf(vfpacc1x1);
+
+ const long voutput_min_less_zero_point = params->scalar_lrint.output_min_less_zero_point;
+ vrndacc0x0 = XNN_UNPREDICTABLE(vrndacc0x0 < voutput_min_less_zero_point) ? voutput_min_less_zero_point : vrndacc0x0;
+ vrndacc0x1 = XNN_UNPREDICTABLE(vrndacc0x1 < voutput_min_less_zero_point) ? voutput_min_less_zero_point : vrndacc0x1;
+ vrndacc1x0 = XNN_UNPREDICTABLE(vrndacc1x0 < voutput_min_less_zero_point) ? voutput_min_less_zero_point : vrndacc1x0;
+ vrndacc1x1 = XNN_UNPREDICTABLE(vrndacc1x1 < voutput_min_less_zero_point) ? voutput_min_less_zero_point : vrndacc1x1;
+
+ const long voutput_max_less_zero_point = params->scalar_lrint.output_max_less_zero_point;
+ vrndacc0x0 = XNN_UNPREDICTABLE(vrndacc0x0 > voutput_max_less_zero_point) ? voutput_max_less_zero_point : vrndacc0x0;
+ vrndacc0x1 = XNN_UNPREDICTABLE(vrndacc0x1 > voutput_max_less_zero_point) ? voutput_max_less_zero_point : vrndacc0x1;
+ vrndacc1x0 = XNN_UNPREDICTABLE(vrndacc1x0 > voutput_max_less_zero_point) ? voutput_max_less_zero_point : vrndacc1x0;
+ vrndacc1x1 = XNN_UNPREDICTABLE(vrndacc1x1 > voutput_max_less_zero_point) ? voutput_max_less_zero_point : vrndacc1x1;
+
+ const int32_t voutput_zero_point = params->scalar_lrint.output_zero_point;
+ int32_t vout0x0 = (int32_t) vrndacc0x0 + voutput_zero_point;
+ int32_t vout0x1 = (int32_t) vrndacc0x1 + voutput_zero_point;
+ int32_t vout1x0 = (int32_t) vrndacc1x0 + voutput_zero_point;
+ int32_t vout1x1 = (int32_t) vrndacc1x1 + voutput_zero_point;
+
+ if XNN_LIKELY(nc >= 2) {
+ c1[0] = (int8_t) vout1x0;
+ c1[1] = (int8_t) vout1x1;
+ c0[0] = (int8_t) vout0x0;
+ c0[1] = (int8_t) vout0x1;
+
+ c1 = (int8_t*) ((uintptr_t) c1 + cn_stride);
+ c0 = (int8_t*) ((uintptr_t) c0 + cn_stride);
+
+ a = (const int8_t**restrict) ((uintptr_t) a - ks);
+ nc -= 2;
+ } else {
+ if (nc & 1) {
+ c1[0] = (int8_t) vout1x0;
+ c0[0] = (int8_t) vout0x0;
+ }
+
+ nc = 0;
+ }
+ } while (nc != 0);
+}