And add the SSSE3 split off version

1 files changed, 30 insertions, 0 deletions

diff --git a/ssse3_gemm.h b/ssse3_gemm.h
new file mode 100644
index 0000000..afbe4f0
--- /dev/null
+++ b/ssse3_gemm.h
@@ -0,0 +1,30 @@
+#pragma once
+#include <stdint.h>
+
+// 16-bit is in sse2_gemm.h
+
+namespace intgemm {
+
+// pmaddubsw (the 8-bit multiply) is SSSE3, so pedantically that's the version we need.
+struct SSSE3_8bit {
+  typedef int8_t Integer;
+
+  // Currently A is prepared by quantization but this could theoretically change.
+  static inline void PrepareA(const float *input, int8_t *output, float quant_mult, int rows, int cols) {
+    Quantize(input, output, quant_mult, rows * cols);
+  }
+
+  static void Quantize(const float *input, int8_t *output, float quant_mult, int size);
+
+  // Tile size for B; B must be a multiple of this block size.
+  static const int kBTileRow = 16;
+  static const int kBTileCol = 8;
+
+  static void PrepareB(const float *input, int8_t *output, float quant_mult, int rows, int cols);
+
+  static void Multiply(const int8_t *A, const int8_t *B, float *C, float unquant_mult, int A_rows, int width, int B_cols);
+  
+  static const char *const kName;
+};
+
+} // namespace intgemm