From 6b8a368c51082fdd010ef5e1b0be4eb9b5059d1a Mon Sep 17 00:00:00 2001 From: Javier Date: Mon, 26 Oct 2026 00:50:06 +0100 Subject: refactor common parts into inc/ch375.h and add win9x, linux drivers --- w9x/utils.h | 33 +++++++++++++++++++++++++++++++++ 1 file changed, 33 insertions(+) create mode 100644 w9x/utils.h (limited to 'w9x/utils.h') diff --git a/w9x/utils.h b/w9x/utils.h new file mode 100644 index 0000000..527a14b --- /dev/null +++ b/w9x/utils.h @@ -0,0 +1,33 @@ +/* + * CHU - Misc utilities + * Copyright (C) 2026 Javier S. Pedro + * + * 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, either version 3 of the License, or + * (at your option) any later version. + + * 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, see . + */ + +#ifndef UTILS_H +#define UTILS_H + +#define SWAPNC_32(w) (\ + (((w) & 0x000000FFUL) << 24) |\ + (((w) & 0x0000FF00UL) << 8) |\ + (((w) & 0x00FF0000UL) >> 8) |\ + (((w) & 0xFF000000UL) >> 24)\ + ) + +/** Computes log2 for an unsigned integer, uses 386+ bsr instruction */ +static inline unsigned ulog2(uint32_t x); +#pragma aux ulog2 = "bsr eax, eax" parm [eax] value [eax] modify exact [] nomemory + +#endif // UTILS_H -- cgit v1.2.3