Initial import

libc/nexgen32e/rldecode.S

@@ -0,0 +1,41 @@
+/*-*- mode:asm; indent-tabs-mode:t; tab-width:8; coding:utf-8               -*-│
+│vi: set et ft=asm ts=8 sw=8 fenc=utf-8                                     :vi│
+╞══════════════════════════════════════════════════════════════════════════════╡
+│ Copyright 2020 Justine Alexandra Roberts Tunney                              │
+│                                                                              │
+│ 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., 51 Franklin Street, Fifth Floor, Boston, MA                │
+│ 02110-1301 USA                                                               │
+╚─────────────────────────────────────────────────────────────────────────────*/
+#include "libc/macros.h"
+.text.startup
+
+/	Seventeen byte decompressor.
+/
+/	@param	di points to output buffer
+/	@param	si points to uint8_t {len₁,byte₁}, ..., {0,0}
+/	@mode	long,legacy,real
+rldecode:
+	.leafprologue
+	.profilable
+	xor	%ecx,%ecx
+0:	lodsb
+	xchg	%al,%cl
+	lodsb
+	jrcxz	2f
+1:	stosb
+	loop	1b
+	jmp	0b
+2:	.leafepilogue
+	.endfn	rldecode,globl
+	.yoink	__FILE__