altos: Add 64-bit add/mul/shift for SDCC

[fw/altos] / src / core / ao_int64.h

diff --git a/src/core/ao_int64.h b/src/core/ao_int64.h
new file mode 100644 (file)
index 0000000..93aa87e
--- /dev/null
+++ b/src/core/ao_int64.h
@@ -0,0 +1,39 @@
+/*
+ * Copyright © 2013 Keith Packard <keithp@keithp.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; version 2 of the License.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
+ */
+
+#ifndef _AO_INT64_H_
+#define _AO_INT64_H_
+
+#include <stdint.h>
+
+typedef struct {
+       uint32_t        high;
+       uint32_t        low;
+} ao_int64_t;
+
+void ao_plus64(ao_int64_t *r, ao_int64_t *a, ao_int64_t *b);
+void ao_rshift64(ao_int64_t *r, ao_int64_t *a, uint8_t d);
+void ao_lshift64(ao_int64_t *r, ao_int64_t *a, uint8_t d);
+void ao_mul64(ao_int64_t *r, int32_t a, int32_t b);
+void ao_mul64_16(ao_int64_t *r, ao_int64_t *a, uint16_t b);
+
+#define ao_int64_init32(r, a) (((r)->high = 0), (r)->low = (a))
+#define ao_int64_init64(r, a, b) (((r)->high = (a)), (r)->low = (b))
+
+#define ao_cast64(a) (((int64_t) (a)->high << 32) | (a)->low)
+
+#endif /* _AO_INT64_H_ */