Imported to git.

1 files changed, 117 insertions, 0 deletions

diff --git a/src/liblzma/simple/ia64.c b/src/liblzma/simple/ia64.c
new file mode 100644
index 00000000..59830521
--- /dev/null
+++ b/src/liblzma/simple/ia64.c
@@ -0,0 +1,117 @@
+///////////////////////////////////////////////////////////////////////////////
+//
+/// \file       ia64.c
+/// \brief      Filter for IA64 (Itanium) binaries
+//
+//  Copyright (C) 1999-2006 Igor Pavlov
+//  Copyright (C) 2007 Lasse Collin
+//
+//  This library is free software; you can redistribute it and/or
+//  modify it under the terms of the GNU Lesser General Public
+//  License as published by the Free Software Foundation; either
+//  version 2.1 of the License, or (at your option) any later version.
+//
+//  This library 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
+//  Lesser General Public License for more details.
+//
+///////////////////////////////////////////////////////////////////////////////
+
+#include "simple_private.h"
+
+
+static size_t
+ia64_code(lzma_simple *simple lzma_attribute((unused)),
+		uint32_t now_pos, bool is_encoder,
+		uint8_t *buffer, size_t size)
+{
+	static const uint32_t BRANCH_TABLE[32] = {
+		0, 0, 0, 0, 0, 0, 0, 0,
+		0, 0, 0, 0, 0, 0, 0, 0,
+		4, 4, 6, 6, 0, 0, 7, 7,
+		4, 4, 0, 0, 4, 4, 0, 0
+	};
+
+	size_t i;
+	for (i = 0; i + 16 <= size; i += 16) {
+		const uint32_t instr_template = buffer[i] & 0x1F;
+		const uint32_t mask = BRANCH_TABLE[instr_template];
+		uint32_t bit_pos = 5;
+
+		for (size_t slot = 0; slot < 3; ++slot, bit_pos += 41) {
+			if (((mask >> slot) & 1) == 0)
+				continue;
+
+			const size_t byte_pos = (bit_pos >> 3);
+			const uint32_t bit_res = bit_pos & 0x7;
+			uint64_t instruction = 0;
+
+			for (size_t j = 0; j < 6; ++j)
+				instruction += (uint64_t)(
+						buffer[i + j + byte_pos])
+						<< (8 * j);
+
+			uint64_t inst_norm = instruction >> bit_res;
+
+			if (((inst_norm >> 37) & 0xF) == 0x5
+					&& ((inst_norm >> 9) & 0x7) == 0
+					/* &&  (inst_norm & 0x3F)== 0 */
+					) {
+				uint32_t src = (uint32_t)(
+						(inst_norm >> 13) & 0xFFFFF);
+				src |= ((inst_norm >> 36) & 1) << 20;
+
+				src <<= 4;
+
+				uint32_t dest;
+				if (is_encoder)
+					dest = now_pos + (uint32_t)(i) + src;
+				else
+					dest = src - (now_pos + (uint32_t)(i));
+
+				dest >>= 4;
+
+				inst_norm &= ~((uint64_t)(0x8FFFFF) << 13);
+				inst_norm |= (uint64_t)(dest & 0xFFFFF) << 13;
+				inst_norm |= (uint64_t)(dest & 0x100000)
+						<< (36 - 20);
+
+				instruction &= (1 << bit_res) - 1;
+				instruction |= (inst_norm << bit_res);
+
+				for (size_t j = 0; j < 6; j++)
+					buffer[i + j + byte_pos] = (uint8_t)(
+							instruction
+							>> (8 * j));
+			}
+		}
+	}
+
+	return i;
+}
+
+
+static lzma_ret
+ia64_coder_init(lzma_next_coder *next, lzma_allocator *allocator,
+		const lzma_filter_info *filters, bool is_encoder)
+{
+	return lzma_simple_coder_init(next, allocator, filters,
+			&ia64_code, 0, 4, is_encoder);
+}
+
+
+extern lzma_ret
+lzma_simple_ia64_encoder_init(lzma_next_coder *next,
+		lzma_allocator *allocator, const lzma_filter_info *filters)
+{
+	return ia64_coder_init(next, allocator, filters, true);
+}
+
+
+extern lzma_ret
+lzma_simple_ia64_decoder_init(lzma_next_coder *next,
+		lzma_allocator *allocator, const lzma_filter_info *filters)
+{
+	return ia64_coder_init(next, allocator, filters, false);
+}