--- /dev/null
+#include <inttypes.h>
+#include <stdio.h>
+
+int main(int argc, char *argv[])
+{
+ /* Polynomial in bit-reversed notation */
+ uint64_t poly;
+ uint64_t crctab[256], v;
+ int i, j;
+
+ poly = strtoumax(argv[1], NULL, 0);
+
+ printf("/* C */\n");
+ printf("static const uint64_t crc64_tab[256] = {\n");
+ for (i = 0; i < 256; i++) {
+ v = i;
+ for (j = 0; j < 8; j++)
+ v = (v >> 1) ^ ((v & 1) ? poly : 0);
+ crctab[i] = v;
+ }
+
+ for (i = 0; i < 256; i += 2) {
+ printf(" /* %02x */ UINT64_C(0x%016"PRIx64"), "
+ "UINT64_C(0x%016"PRIx64")%s\n",
+ i, crctab[i], crctab[i+1], (i == 254) ? "" : ",");
+ }
+ printf("};\n\n");
+
+ printf("# perl\n");
+ printf("@crc64_tab = (\n");
+ for (i = 0; i < 256; i += 2) {
+ printf(" [0x%08"PRIx32", 0x%08"PRIx32"], "
+ "[0x%08"PRIx32", 0x%08"PRIx32"]%-1s # %02x\n",
+ (uint32_t)(crctab[i] >> 32),
+ (uint32_t)(crctab[i]),
+ (uint32_t)(crctab[i+1] >> 32),
+ (uint32_t)(crctab[i+1]),
+ (i == 254) ? "" : ",",
+ i);
+ }
+ printf(");\n");
+
+ return 0;
+}
+
+
+