Adding upstream version 14.2.21.upstream/14.2.21upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 1180 insertions, 0 deletions

diff --git a/src/isa-l/igzip/igzip.c b/src/isa-l/igzip/igzip.c
new file mode 100644
index 00000000..6ac1c150
--- /dev/null
+++ b/src/isa-l/igzip/igzip.c
@@ -0,0 +1,1180 @@
+/**********************************************************************
+  Copyright(c) 2011-2016 Intel Corporation All rights reserved.
+
+  Redistribution and use in source and binary forms, with or without
+  modification, are permitted provided that the following conditions
+  are met:
+    * Redistributions of source code must retain the above copyright
+      notice, this list of conditions and the following disclaimer.
+    * Redistributions in binary form must reproduce the above copyright
+      notice, this list of conditions and the following disclaimer in
+      the documentation and/or other materials provided with the
+      distribution.
+    * Neither the name of Intel Corporation nor the names of its
+      contributors may be used to endorse or promote products derived
+      from this software without specific prior written permission.
+
+  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+  "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+  LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+  A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+  OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+  SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+  LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+  DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+  THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+  (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+  OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+**********************************************************************/
+
+#define ASM
+
+#include <assert.h>
+#include <string.h>
+#ifdef _WIN32
+# include <intrin.h>
+#endif
+
+#define MAX_WRITE_BITS_SIZE 8
+#define FORCE_FLUSH 64
+#define MIN_OBUF_SIZE 224
+#define NON_EMPTY_BLOCK_SIZE 6
+#define MAX_SYNC_FLUSH_SIZE NON_EMPTY_BLOCK_SIZE + MAX_WRITE_BITS_SIZE
+
+#define MAX_TOKENS (16 * 1024)
+
+#include "huffman.h"
+#include "bitbuf2.h"
+#include "igzip_lib.h"
+#include "repeated_char_result.h"
+#include "huff_codes.h"
+#include "encode_df.h"
+#include "igzip_level_buf_structs.h"
+
+extern const uint8_t gzip_hdr[];
+extern const uint32_t gzip_hdr_bytes;
+extern const uint32_t gzip_trl_bytes;
+extern const struct isal_hufftables hufftables_default;
+extern const struct isal_hufftables hufftables_static;
+
+extern uint32_t crc32_gzip(uint32_t init_crc, const unsigned char *buf, uint64_t len);
+
+static int write_stored_block_stateless(struct isal_zstream *stream, uint32_t stored_len,
+					uint32_t crc32);
+
+static int write_gzip_header_stateless(struct isal_zstream *stream);
+static void write_gzip_header(struct isal_zstream *stream);
+static int write_deflate_header_stateless(struct isal_zstream *stream);
+static int write_deflate_header_unaligned_stateless(struct isal_zstream *stream);
+
+unsigned int detect_repeated_char(uint8_t * buf, uint32_t size);
+
+#define STORED_BLK_HDR_BZ 5
+#define STORED_BLK_MAX_BZ 65535
+
+void isal_deflate_body(struct isal_zstream *stream);
+void isal_deflate_finish(struct isal_zstream *stream);
+
+void isal_deflate_icf_body(struct isal_zstream *stream);
+void isal_deflate_icf_finish(struct isal_zstream *stream);
+/*****************************************************************/
+
+/* Forward declarations */
+static inline void reset_match_history(struct isal_zstream *stream);
+void write_header(struct isal_zstream *stream, uint8_t * deflate_hdr,
+		  uint32_t deflate_hdr_count, uint32_t extra_bits_count, uint32_t next_state,
+		  uint32_t toggle_end_of_stream);
+void write_deflate_header(struct isal_zstream *stream);
+void write_trailer(struct isal_zstream *stream);
+
+struct slver {
+	uint16_t snum;
+	uint8_t ver;
+	uint8_t core;
+};
+
+/* Version info */
+struct slver isal_deflate_init_slver_01030081;
+struct slver isal_deflate_init_slver = { 0x0081, 0x03, 0x01 };
+
+struct slver isal_deflate_stateless_init_slver_00010084;
+struct slver isal_deflate_stateless_init_slver = { 0x0084, 0x01, 0x00 };
+
+struct slver isal_deflate_slver_01030082;
+struct slver isal_deflate_slver = { 0x0082, 0x03, 0x01 };
+
+struct slver isal_deflate_stateless_slver_01010083;
+struct slver isal_deflate_stateless_slver = { 0x0083, 0x01, 0x01 };
+
+struct slver isal_deflate_set_hufftables_slver_00_01_008b;
+struct slver isal_deflate_set_hufftables_slver = { 0x008b, 0x01, 0x00 };
+
+/*****************************************************************/
+static
+void sync_flush(struct isal_zstream *stream)
+{
+	struct isal_zstate *state = &stream->internal_state;
+	uint64_t bits_to_write = 0xFFFF0000, bits_len;
+	uint64_t bytes;
+	int flush_size;
+
+	if (stream->avail_out >= 8) {
+		set_buf(&state->bitbuf, stream->next_out, stream->avail_out);
+
+		flush_size = (-(state->bitbuf.m_bit_count + 3)) % 8;
+
+		bits_to_write <<= flush_size + 3;
+		bits_len = 32 + flush_size + 3;
+
+#ifdef USE_BITBUFB		/* Write Bits Always */
+		state->state = ZSTATE_NEW_HDR;
+#else /* Not Write Bits Always */
+		state->state = ZSTATE_FLUSH_WRITE_BUFFER;
+#endif
+		state->has_eob = 0;
+
+		write_bits(&state->bitbuf, bits_to_write, bits_len);
+
+		bytes = buffer_used(&state->bitbuf);
+		stream->next_out = buffer_ptr(&state->bitbuf);
+		stream->avail_out -= bytes;
+		stream->total_out += bytes;
+
+		if (stream->flush == FULL_FLUSH) {
+			/* Clear match history so there are no cross
+			 * block length distance pairs */
+			state->file_start -= state->b_bytes_processed;
+			state->b_bytes_valid -= state->b_bytes_processed;
+			state->b_bytes_processed = 0;
+			reset_match_history(stream);
+		}
+	}
+}
+
+static void flush_write_buffer(struct isal_zstream *stream)
+{
+	struct isal_zstate *state = &stream->internal_state;
+	int bytes = 0;
+	if (stream->avail_out >= 8) {
+		set_buf(&state->bitbuf, stream->next_out, stream->avail_out);
+		flush(&state->bitbuf);
+		stream->next_out = buffer_ptr(&state->bitbuf);
+		bytes = buffer_used(&state->bitbuf);
+		stream->avail_out -= bytes;
+		stream->total_out += bytes;
+		state->state = ZSTATE_NEW_HDR;
+	}
+}
+
+static void flush_icf_block(struct isal_zstream *stream)
+{
+	struct isal_zstate *state = &stream->internal_state;
+	struct level_2_buf *level_buf = (struct level_2_buf *)stream->level_buf;
+	struct BitBuf2 *write_buf = &state->bitbuf;
+	struct deflate_icf *icf_buf_encoded_next;
+
+	set_buf(write_buf, stream->next_out, stream->avail_out);
+
+#if defined (USE_BITBUF8) || (USE_BITBUF_ELSE)
+	if (!is_full(write_buf))
+		flush_bits(write_buf);
+#endif
+
+	icf_buf_encoded_next = encode_deflate_icf(level_buf->icf_buf_start + state->count,
+						  level_buf->icf_buf_next, write_buf,
+						  &level_buf->encode_tables);
+
+	state->count = icf_buf_encoded_next - level_buf->icf_buf_start;
+	stream->next_out = buffer_ptr(write_buf);
+	stream->total_out += buffer_used(write_buf);
+	stream->avail_out -= buffer_used(write_buf);
+
+	if (level_buf->icf_buf_next <= icf_buf_encoded_next) {
+		state->count = 0;
+		if (stream->avail_in == 0 && stream->end_of_stream)
+			state->state = ZSTATE_TRL;
+		else if (stream->avail_in == 0 && stream->flush != NO_FLUSH)
+			state->state = ZSTATE_SYNC_FLUSH;
+		else
+			state->state = ZSTATE_NEW_HDR;
+	}
+}
+
+static void init_new_icf_block(struct isal_zstream *stream)
+{
+	struct isal_zstate *state = &stream->internal_state;
+	struct level_2_buf *level_buf = (struct level_2_buf *)stream->level_buf;
+
+	if (stream->level_buf_size >=
+	    sizeof(struct level_2_buf) + 100 * sizeof(struct deflate_icf)) {
+		level_buf->icf_buf_next = level_buf->icf_buf_start;
+		level_buf->icf_buf_avail_out =
+		    stream->level_buf_size - sizeof(struct level_2_buf) -
+		    sizeof(struct deflate_icf);
+		memset(&state->hist, 0, sizeof(struct isal_mod_hist));
+		state->state = ZSTATE_BODY;
+	}
+}
+
+static void create_icf_block_hdr(struct isal_zstream *stream)
+{
+	struct isal_zstate *state = &stream->internal_state;
+	struct level_2_buf *level_buf = (struct level_2_buf *)stream->level_buf;
+	struct BitBuf2 *write_buf = &state->bitbuf;
+	struct BitBuf2 write_buf_tmp;
+	uint32_t out_size = stream->avail_out;
+	uint8_t *end_out = stream->next_out + out_size;
+	/* Write EOB in icf_buf */
+	state->hist.ll_hist[256] = 1;
+	level_buf->icf_buf_next->lit_len = 0x100;
+	level_buf->icf_buf_next->lit_dist = NULL_DIST_SYM;
+	level_buf->icf_buf_next->dist_extra = 0;
+	level_buf->icf_buf_next++;
+
+	state->has_eob_hdr = stream->end_of_stream && !stream->avail_in;
+	if (end_out - stream->next_out >= ISAL_DEF_MAX_HDR_SIZE) {
+		/* Determine whether this is the final block */
+
+		if (stream->gzip_flag == IGZIP_GZIP)
+			write_gzip_header_stateless(stream);
+
+		set_buf(write_buf, stream->next_out, stream->avail_out);
+
+		create_hufftables_icf(write_buf, &level_buf->encode_tables, &state->hist,
+				      state->has_eob_hdr);
+		state->state = ZSTATE_FLUSH_ICF_BUFFER;
+		stream->next_out = buffer_ptr(write_buf);
+		stream->total_out += buffer_used(write_buf);
+		stream->avail_out -= buffer_used(write_buf);
+	} else {
+		/* Start writing into temporary buffer */
+		write_buf_tmp.m_bits = write_buf->m_bits;
+		write_buf_tmp.m_bit_count = write_buf->m_bit_count;
+
+		write_buf->m_bits = 0;
+		write_buf->m_bit_count = 0;
+
+		set_buf(&write_buf_tmp, level_buf->deflate_hdr, ISAL_DEF_MAX_HDR_SIZE);
+
+		create_hufftables_icf(&write_buf_tmp, &level_buf->encode_tables,
+				      &state->hist, state->has_eob_hdr);
+
+		level_buf->deflate_hdr_count = buffer_used(&write_buf_tmp);
+		level_buf->deflate_hdr_extra_bits = write_buf_tmp.m_bit_count;
+		flush(&write_buf_tmp);
+
+		state->state = ZSTATE_HDR;
+	}
+}
+
+static void isal_deflate_pass(struct isal_zstream *stream)
+{
+	struct isal_zstate *state = &stream->internal_state;
+	struct isal_hufftables *hufftables = stream->hufftables;
+	uint8_t *start_in = stream->next_in;
+
+	if (state->state == ZSTATE_NEW_HDR || state->state == ZSTATE_HDR) {
+		if (state->count == 0)
+			/* Assume the final header is being written since the header
+			 * stored in hufftables is the final header. */
+			state->has_eob_hdr = 1;
+		write_header(stream, hufftables->deflate_hdr, hufftables->deflate_hdr_count,
+			     hufftables->deflate_hdr_extra_bits, ZSTATE_BODY,
+			     !stream->end_of_stream);
+	}
+
+	if (state->state == ZSTATE_BODY)
+		isal_deflate_body(stream);
+
+	if (state->state == ZSTATE_FLUSH_READ_BUFFER)
+		isal_deflate_finish(stream);
+
+	if (state->state == ZSTATE_SYNC_FLUSH)
+		sync_flush(stream);
+
+	if (state->state == ZSTATE_FLUSH_WRITE_BUFFER)
+		flush_write_buffer(stream);
+
+	if (stream->gzip_flag)
+		state->crc = crc32_gzip(state->crc, start_in, stream->next_in - start_in);
+
+	if (state->state == ZSTATE_TRL)
+		write_trailer(stream);
+}
+
+static void isal_deflate_icf_pass(struct isal_zstream *stream)
+{
+	uint8_t *start_in = stream->next_in;
+	struct isal_zstate *state = &stream->internal_state;
+	struct level_2_buf *level_buf = (struct level_2_buf *)stream->level_buf;
+
+	do {
+		if (state->state == ZSTATE_NEW_HDR)
+			init_new_icf_block(stream);
+
+		if (state->state == ZSTATE_BODY)
+			isal_deflate_icf_body(stream);
+
+		if (state->state == ZSTATE_FLUSH_READ_BUFFER)
+			isal_deflate_icf_finish(stream);
+
+		if (state->state == ZSTATE_CREATE_HDR)
+			create_icf_block_hdr(stream);
+
+		if (state->state == ZSTATE_HDR)
+			/* Note that the header may be prepended by the
+			 * remaining bits in the previous block, as such the
+			 * toggle header flag cannot be used */
+			write_header(stream, level_buf->deflate_hdr,
+				     level_buf->deflate_hdr_count,
+				     level_buf->deflate_hdr_extra_bits,
+				     ZSTATE_FLUSH_ICF_BUFFER, 0);
+
+		if (state->state == ZSTATE_FLUSH_ICF_BUFFER)
+			flush_icf_block(stream);
+
+	} while (state->state == ZSTATE_NEW_HDR);
+
+	if (state->state == ZSTATE_SYNC_FLUSH)
+		sync_flush(stream);
+
+	if (state->state == ZSTATE_FLUSH_WRITE_BUFFER)
+		flush_write_buffer(stream);
+
+	if (stream->gzip_flag)
+		state->crc = crc32_gzip(state->crc, start_in, stream->next_in - start_in);
+
+	if (state->state == ZSTATE_TRL)
+		write_trailer(stream);
+}
+
+static void isal_deflate_int(struct isal_zstream *stream)
+{
+	struct isal_zstate *state = &stream->internal_state;
+	uint32_t size;
+
+	/* Move data from temporary output buffer to output buffer */
+	if (state->state >= ZSTATE_TMP_OFFSET) {
+		size = state->tmp_out_end - state->tmp_out_start;
+		if (size > stream->avail_out)
+			size = stream->avail_out;
+		memcpy(stream->next_out, state->tmp_out_buff + state->tmp_out_start, size);
+		stream->next_out += size;
+		stream->avail_out -= size;
+		stream->total_out += size;
+		state->tmp_out_start += size;
+
+		if (state->tmp_out_start == state->tmp_out_end)
+			state->state -= ZSTATE_TMP_OFFSET;
+
+		if (stream->avail_out == 0 || state->state == ZSTATE_END
+		    // or do not write out empty blocks since the outbuffer was processed
+		    || (state->state == ZSTATE_NEW_HDR && stream->avail_out == 0))
+			return;
+	}
+	assert(state->tmp_out_start == state->tmp_out_end);
+
+	if (stream->level == 0)
+		isal_deflate_pass(stream);
+	else
+		isal_deflate_icf_pass(stream);
+
+	/* Fill temporary output buffer then complete filling output buffer */
+	if (stream->avail_out > 0 && stream->avail_out < 8 && state->state != ZSTATE_NEW_HDR) {
+		uint8_t *next_out;
+		uint32_t avail_out;
+		uint32_t total_out;
+
+		next_out = stream->next_out;
+		avail_out = stream->avail_out;
+		total_out = stream->total_out;
+
+		stream->next_out = state->tmp_out_buff;
+		stream->avail_out = sizeof(state->tmp_out_buff);
+		stream->total_out = 0;
+
+		if (stream->level == 0)
+			isal_deflate_pass(stream);
+		else
+			isal_deflate_icf_pass(stream);
+
+		state->tmp_out_start = 0;
+		state->tmp_out_end = stream->total_out;
+
+		stream->next_out = next_out;
+		stream->avail_out = avail_out;
+		stream->total_out = total_out;
+		if (state->tmp_out_end) {
+			size = state->tmp_out_end;
+			if (size > stream->avail_out)
+				size = stream->avail_out;
+			memcpy(stream->next_out, state->tmp_out_buff, size);
+			stream->next_out += size;
+			stream->avail_out -= size;
+			stream->total_out += size;
+			state->tmp_out_start += size;
+			if (state->tmp_out_start != state->tmp_out_end)
+				state->state += ZSTATE_TMP_OFFSET;
+
+		}
+	}
+
+}
+
+static void write_constant_compressed_stateless(struct isal_zstream *stream,
+						uint32_t repeated_length)
+{
+	/* Assumes repeated_length is at least 1.
+	 * Assumes the input end_of_stream is either 0 or 1. */
+	struct isal_zstate *state = &stream->internal_state;
+	uint32_t rep_bits = ((repeated_length - 1) / 258) * 2;
+	uint32_t rep_bytes = rep_bits / 8;
+	uint32_t rep_extra = (repeated_length - 1) % 258;
+	uint32_t bytes;
+	uint32_t repeated_char = *stream->next_in;
+	uint8_t *start_in = stream->next_in;
+
+	/* Guarantee there is enough space for the header even in the worst case */
+	if (stream->avail_out < HEADER_LENGTH + MAX_FIXUP_CODE_LENGTH + rep_bytes + 8)
+		return;
+
+	/* Assumes the repeated char is either 0 or 0xFF. */
+	memcpy(stream->next_out, repeated_char_header[repeated_char & 1], HEADER_LENGTH);
+
+	if (stream->avail_in == repeated_length && stream->end_of_stream > 0) {
+		stream->next_out[0] |= 1;
+		state->has_eob_hdr = 1;
+		state->has_eob = 1;
+		state->state = ZSTATE_TRL;
+	} else {
+		state->state = ZSTATE_NEW_HDR;
+	}
+
+	memset(stream->next_out + HEADER_LENGTH, 0, rep_bytes);
+	stream->avail_out -= HEADER_LENGTH + rep_bytes;
+	stream->next_out += HEADER_LENGTH + rep_bytes;
+	stream->total_out += HEADER_LENGTH + rep_bytes;
+
+	set_buf(&state->bitbuf, stream->next_out, stream->avail_out);
+
+	/* These two lines are basically a modified version of init. */
+	state->bitbuf.m_bits = 0;
+	state->bitbuf.m_bit_count = rep_bits % 8;
+
+	/* Add smaller repeat codes as necessary. Code280 can describe repeat
+	 * lengths of 115-130 bits. Code10 can describe repeat lengths of 10
+	 * bits. If more than 230 bits, fill code with two code280s. Else if
+	 * more than 115 repeates, fill with code10s until one code280 can
+	 * finish the rest of the repeats. Else, fill with code10s and
+	 * literals */
+	if (rep_extra > 115) {
+		while (rep_extra > 130 && rep_extra < 230) {
+			write_bits(&state->bitbuf, CODE_10, CODE_10_LENGTH);
+			rep_extra -= 10;
+		}
+
+		if (rep_extra >= 230) {
+			write_bits(&state->bitbuf,
+				   CODE_280 | ((rep_extra / 2 - 115) <<
+					       CODE_280_LENGTH), CODE_280_TOTAL_LENGTH);
+			rep_extra -= rep_extra / 2;
+		}
+
+		write_bits(&state->bitbuf,
+			   CODE_280 | ((rep_extra - 115) << CODE_280_LENGTH),
+			   CODE_280_TOTAL_LENGTH);
+
+	} else {
+		while (rep_extra >= 10) {
+
+			write_bits(&state->bitbuf, CODE_10, CODE_10_LENGTH);
+			rep_extra -= 10;
+		}
+
+		for (; rep_extra > 0; rep_extra--)
+			write_bits(&state->bitbuf, CODE_LIT, CODE_LIT_LENGTH);
+	}
+
+	write_bits(&state->bitbuf, END_OF_BLOCK, END_OF_BLOCK_LEN);
+
+	stream->next_in += repeated_length;
+	stream->avail_in -= repeated_length;
+	stream->total_in += repeated_length;
+
+	bytes = buffer_used(&state->bitbuf);
+	stream->next_out = buffer_ptr(&state->bitbuf);
+	stream->avail_out -= bytes;
+	stream->total_out += bytes;
+
+	if (stream->gzip_flag)
+		state->crc = crc32_gzip(state->crc, start_in, stream->next_in - start_in);
+
+	return;
+}
+
+int detect_repeated_char_length(uint8_t * in, uint32_t length)
+{
+	/* This currently assumes the first 8 bytes are the same character.
+	 * This won't work effectively if the input stream isn't aligned well. */
+	uint8_t *p_8, *end = in + length;
+	uint64_t *p_64 = (uint64_t *) in;
+	uint64_t w = *p_64;
+	uint8_t c = (uint8_t) w;
+
+	for (; (p_64 <= (uint64_t *) (end - 8)) && (w == *p_64); p_64++) ;
+
+	p_8 = (uint8_t *) p_64;
+
+	for (; (p_8 < end) && (c == *p_8); p_8++) ;
+
+	return p_8 - in;
+}
+
+static int isal_deflate_int_stateless(struct isal_zstream *stream)
+{
+	uint32_t repeat_length;
+	struct isal_zstate *state = &stream->internal_state;
+
+	if (stream->gzip_flag == IGZIP_GZIP)
+		if (write_gzip_header_stateless(stream))
+			return STATELESS_OVERFLOW;
+
+	if (stream->avail_in >= 8
+	    && (*(uint64_t *) stream->next_in == 0
+		|| *(uint64_t *) stream->next_in == ~(uint64_t) 0)) {
+		repeat_length = detect_repeated_char_length(stream->next_in, stream->avail_in);
+
+		if (stream->avail_in == repeat_length || repeat_length >= MIN_REPEAT_LEN)
+			write_constant_compressed_stateless(stream, repeat_length);
+	}
+
+	if (stream->level == 0) {
+		if (state->state == ZSTATE_NEW_HDR || state->state == ZSTATE_HDR) {
+			write_deflate_header_unaligned_stateless(stream);
+			if (state->state == ZSTATE_NEW_HDR || state->state == ZSTATE_HDR)
+				return STATELESS_OVERFLOW;
+
+			reset_match_history(stream);
+		}
+
+		state->file_start = stream->next_in - stream->total_in;
+		isal_deflate_pass(stream);
+
+	} else if (stream->level == 1) {
+		if (stream->level_buf == NULL || stream->level_buf_size < ISAL_DEF_LVL1_MIN) {
+			/* Default to internal buffer if invalid size is supplied */
+			stream->level_buf = state->buffer;
+			stream->level_buf_size = sizeof(state->buffer);
+		}
+
+		if (state->state == ZSTATE_NEW_HDR || state->state == ZSTATE_HDR)
+			reset_match_history(stream);
+
+		state->count = 0;
+		state->file_start = stream->next_in - stream->total_in;
+		isal_deflate_icf_pass(stream);
+
+	} else
+		return ISAL_INVALID_LEVEL;
+
+	if (state->state == ZSTATE_END
+	    || (state->state == ZSTATE_NEW_HDR && stream->flush == FULL_FLUSH))
+		return COMP_OK;
+	else
+		return STATELESS_OVERFLOW;
+}
+
+static int write_stored_block_stateless(struct isal_zstream *stream,
+					uint32_t stored_len, uint32_t crc32)
+{
+	uint64_t stored_blk_hdr;
+	uint32_t copy_size;
+	uint32_t avail_in;
+	uint64_t gzip_trl;
+
+	if (stream->avail_out < stored_len)
+		return STATELESS_OVERFLOW;
+
+	stream->avail_out -= stored_len;
+	stream->total_out += stored_len;
+	avail_in = stream->avail_in;
+
+	if (stream->gzip_flag == IGZIP_GZIP) {
+		memcpy(stream->next_out, gzip_hdr, gzip_hdr_bytes);
+		stream->next_out += gzip_hdr_bytes;
+		stream->gzip_flag = IGZIP_GZIP_NO_HDR;
+	}
+
+	do {
+		if (avail_in >= STORED_BLK_MAX_BZ) {
+			stored_blk_hdr = 0xFFFF00;
+			copy_size = STORED_BLK_MAX_BZ;
+		} else {
+			stored_blk_hdr = ~avail_in;
+			stored_blk_hdr <<= 24;
+			stored_blk_hdr |= (avail_in & 0xFFFF) << 8;
+			copy_size = avail_in;
+		}
+
+		avail_in -= copy_size;
+
+		/* Handle BFINAL bit */
+		if (avail_in == 0) {
+			if (stream->flush == NO_FLUSH || stream->end_of_stream) {
+				stored_blk_hdr |= 0x1;
+				stream->internal_state.has_eob_hdr = 1;
+			}
+		}
+		memcpy(stream->next_out, &stored_blk_hdr, STORED_BLK_HDR_BZ);
+		stream->next_out += STORED_BLK_HDR_BZ;
+
+		memcpy(stream->next_out, stream->next_in, copy_size);
+		stream->next_out += copy_size;
+		stream->next_in += copy_size;
+		stream->total_in += copy_size;
+	} while (avail_in != 0);
+
+	if (stream->gzip_flag && stream->internal_state.has_eob_hdr) {
+		gzip_trl = stream->avail_in;
+		gzip_trl <<= 32;
+		gzip_trl |= crc32 & 0xFFFFFFFF;
+		memcpy(stream->next_out, &gzip_trl, gzip_trl_bytes);
+		stream->next_out += gzip_trl_bytes;
+	}
+
+	stream->avail_in = 0;
+	return COMP_OK;
+}
+
+static inline void reset_match_history(struct isal_zstream *stream)
+{
+	struct isal_zstate *state = &stream->internal_state;
+	uint16_t *head = stream->internal_state.head;
+	int i = 0;
+
+	state->has_hist = 0;
+
+	if (stream->total_in == 0)
+		memset(stream->internal_state.head, 0, sizeof(stream->internal_state.head));
+	else {
+		for (i = 0; i < sizeof(state->head) / 2; i++) {
+			head[i] = (uint16_t) (stream->total_in);
+		}
+	}
+}
+
+void isal_deflate_init(struct isal_zstream *stream)
+{
+	struct isal_zstate *state = &stream->internal_state;
+
+	stream->total_in = 0;
+	stream->total_out = 0;
+	stream->hufftables = (struct isal_hufftables *)&hufftables_default;
+	stream->level = 0;
+	stream->level_buf = NULL;
+	stream->level_buf_size = 0;
+	stream->end_of_stream = 0;
+	stream->flush = NO_FLUSH;
+	stream->gzip_flag = 0;
+
+	state->b_bytes_valid = 0;
+	state->b_bytes_processed = 0;
+	state->has_eob = 0;
+	state->has_eob_hdr = 0;
+	state->has_hist = 0;
+	state->state = ZSTATE_NEW_HDR;
+	state->count = 0;
+
+	state->tmp_out_start = 0;
+	state->tmp_out_end = 0;
+
+	state->file_start = stream->next_in;
+
+	init(&state->bitbuf);
+
+	state->crc = 0;
+
+	memset(state->head, 0, sizeof(state->head));
+
+	return;
+}
+
+int isal_deflate_set_hufftables(struct isal_zstream *stream,
+				struct isal_hufftables *hufftables, int type)
+{
+	if (stream->internal_state.state != ZSTATE_NEW_HDR)
+		return ISAL_INVALID_OPERATION;
+
+	switch (type) {
+	case IGZIP_HUFFTABLE_DEFAULT:
+		stream->hufftables = (struct isal_hufftables *)&hufftables_default;
+		break;
+	case IGZIP_HUFFTABLE_STATIC:
+		stream->hufftables = (struct isal_hufftables *)&hufftables_static;
+		break;
+	case IGZIP_HUFFTABLE_CUSTOM:
+		if (hufftables != NULL) {
+			stream->hufftables = hufftables;
+			break;
+		}
+	default:
+		return ISAL_INVALID_OPERATION;
+	}
+
+	return COMP_OK;
+}
+
+void isal_deflate_stateless_init(struct isal_zstream *stream)
+{
+	stream->total_in = 0;
+	stream->total_out = 0;
+	stream->hufftables = (struct isal_hufftables *)&hufftables_default;
+	stream->level = 0;
+	stream->level_buf = NULL;
+	stream->level_buf_size = 0;
+	stream->end_of_stream = 0;
+	stream->flush = NO_FLUSH;
+	stream->gzip_flag = 0;
+	stream->internal_state.state = ZSTATE_NEW_HDR;
+	return;
+}
+
+int isal_deflate_stateless(struct isal_zstream *stream)
+{
+	uint8_t *next_in = stream->next_in;
+	const uint32_t avail_in = stream->avail_in;
+	const uint32_t total_in = stream->total_in;
+
+	uint8_t *next_out = stream->next_out;
+	const uint32_t avail_out = stream->avail_out;
+	const uint32_t total_out = stream->total_out;
+	const uint32_t gzip_flag = stream->gzip_flag;
+
+	uint32_t crc32 = 0;
+	uint32_t stored_len;
+
+	/* Final block has already been written */
+	stream->internal_state.has_eob_hdr = 0;
+	init(&stream->internal_state.bitbuf);
+	stream->internal_state.state = ZSTATE_NEW_HDR;
+	stream->internal_state.crc = 0;
+
+	if (stream->flush == NO_FLUSH)
+		stream->end_of_stream = 1;
+
+	if (stream->flush != NO_FLUSH && stream->flush != FULL_FLUSH)
+		return INVALID_FLUSH;
+
+	if (stream->level != 0 && stream->level != 1)
+		return ISAL_INVALID_LEVEL;
+
+	if (avail_in == 0)
+		stored_len = STORED_BLK_HDR_BZ;
+	else
+		stored_len =
+		    STORED_BLK_HDR_BZ * ((avail_in + STORED_BLK_MAX_BZ - 1) /
+					 STORED_BLK_MAX_BZ) + avail_in;
+
+	/*
+	   at least 1 byte compressed data in the case of empty dynamic block which only
+	   contains the EOB
+	 */
+
+	if (stream->gzip_flag == IGZIP_GZIP)
+		stored_len += gzip_hdr_bytes + gzip_trl_bytes;
+
+	else if (stream->gzip_flag == IGZIP_GZIP_NO_HDR)
+		stored_len += gzip_trl_bytes;
+
+	/*
+	   the output buffer should be no less than 8 bytes
+	   while empty stored deflate block is 5 bytes only
+	 */
+	if (stream->avail_out < 8)
+		return STATELESS_OVERFLOW;
+
+	if (isal_deflate_int_stateless(stream) == COMP_OK)
+		return COMP_OK;
+	else {
+		if (stream->flush == FULL_FLUSH) {
+			stream->internal_state.file_start =
+			    (uint8_t *) & stream->internal_state.buffer;
+			reset_match_history(stream);
+		}
+		stream->internal_state.has_eob_hdr = 0;
+	}
+
+	if (avail_out < stored_len)
+		return STATELESS_OVERFLOW;
+
+	stream->next_in = next_in;
+	stream->avail_in = avail_in;
+	stream->total_in = total_in;
+
+	stream->next_out = next_out;
+	stream->avail_out = avail_out;
+	stream->total_out = total_out;
+
+	stream->gzip_flag = gzip_flag;
+
+	if (stream->gzip_flag)
+		crc32 = crc32_gzip(0x0, next_in, avail_in);
+
+	return write_stored_block_stateless(stream, stored_len, crc32);
+}
+
+int isal_deflate(struct isal_zstream *stream)
+{
+	struct isal_zstate *state = &stream->internal_state;
+	int ret = COMP_OK;
+	uint8_t *next_in;
+	uint32_t avail_in, avail_in_start;
+	uint32_t flush_type = stream->flush;
+	uint32_t end_of_stream = stream->end_of_stream;
+	int size = 0;
+	uint8_t *copy_down_src = NULL;
+	uint64_t copy_down_size = 0;
+	int32_t processed = -(state->b_bytes_valid - state->b_bytes_processed);
+
+	if (stream->flush >= 3)
+		return INVALID_FLUSH;
+
+	next_in = stream->next_in;
+	avail_in = stream->avail_in;
+	stream->total_in -= state->b_bytes_valid - state->b_bytes_processed;
+
+	do {
+		size = avail_in;
+		if (size > sizeof(state->buffer) - state->b_bytes_valid) {
+			size = sizeof(state->buffer) - state->b_bytes_valid;
+			stream->flush = NO_FLUSH;
+			stream->end_of_stream = 0;
+		}
+		memcpy(&state->buffer[state->b_bytes_valid], next_in, size);
+
+		next_in += size;
+		avail_in -= size;
+		state->b_bytes_valid += size;
+
+		stream->next_in = &state->buffer[state->b_bytes_processed];
+		stream->avail_in = state->b_bytes_valid - state->b_bytes_processed;
+		state->file_start = stream->next_in - stream->total_in;
+		processed += stream->avail_in;
+
+		if (stream->avail_in > IGZIP_HIST_SIZE
+		    || stream->end_of_stream || stream->flush != NO_FLUSH) {
+			avail_in_start = stream->avail_in;
+			isal_deflate_int(stream);
+			state->b_bytes_processed += avail_in_start - stream->avail_in;
+
+			if (state->b_bytes_processed > IGZIP_HIST_SIZE) {
+				copy_down_src =
+				    &state->buffer[state->b_bytes_processed - IGZIP_HIST_SIZE];
+				copy_down_size =
+				    state->b_bytes_valid - state->b_bytes_processed +
+				    IGZIP_HIST_SIZE;
+				memmove(state->buffer, copy_down_src, copy_down_size);
+
+				state->b_bytes_valid -= copy_down_src - state->buffer;
+				state->b_bytes_processed -= copy_down_src - state->buffer;
+			}
+
+		}
+
+		stream->flush = flush_type;
+		stream->end_of_stream = end_of_stream;
+		processed -= stream->avail_in;
+	} while (processed < IGZIP_HIST_SIZE + ISAL_LOOK_AHEAD && avail_in > 0
+		 && stream->avail_out > 0);
+
+	if (processed >= IGZIP_HIST_SIZE + ISAL_LOOK_AHEAD) {
+		stream->next_in = next_in - stream->avail_in;
+		stream->avail_in = avail_in + stream->avail_in;
+
+		state->file_start = stream->next_in - stream->total_in;
+
+		if (stream->avail_in > 0 && stream->avail_out > 0)
+			isal_deflate_int(stream);
+
+		size = stream->avail_in;
+		if (stream->avail_in > IGZIP_HIST_SIZE)
+			size = 0;
+
+		memmove(state->buffer, stream->next_in - IGZIP_HIST_SIZE,
+			size + IGZIP_HIST_SIZE);
+		state->b_bytes_processed = IGZIP_HIST_SIZE;
+		state->b_bytes_valid = size + IGZIP_HIST_SIZE;
+
+		stream->next_in += size;
+		stream->avail_in -= size;
+		stream->total_in += size;
+
+	} else {
+		stream->total_in += state->b_bytes_valid - state->b_bytes_processed;
+		stream->next_in = next_in;
+		stream->avail_in = avail_in;
+		state->file_start = stream->next_in - stream->total_in;
+
+	}
+
+	return ret;
+}
+
+static int write_gzip_header_stateless(struct isal_zstream *stream)
+{
+	if (gzip_hdr_bytes >= stream->avail_out)
+		return STATELESS_OVERFLOW;
+
+	stream->avail_out -= gzip_hdr_bytes;
+	stream->total_out += gzip_hdr_bytes;
+
+	memcpy(stream->next_out, gzip_hdr, gzip_hdr_bytes);
+
+	stream->next_out += gzip_hdr_bytes;
+	stream->gzip_flag = IGZIP_GZIP_NO_HDR;
+
+	return COMP_OK;
+}
+
+static void write_gzip_header(struct isal_zstream *stream)
+{
+	struct isal_zstate *state = &stream->internal_state;
+	int bytes_to_write = gzip_hdr_bytes;
+
+	bytes_to_write -= state->count;
+
+	if (bytes_to_write > stream->avail_out)
+		bytes_to_write = stream->avail_out;
+
+	memcpy(stream->next_out, gzip_hdr + state->count, bytes_to_write);
+	state->count += bytes_to_write;
+
+	if (state->count == gzip_hdr_bytes) {
+		state->count = 0;
+		stream->gzip_flag = IGZIP_GZIP_NO_HDR;
+	}
+
+	stream->avail_out -= bytes_to_write;
+	stream->total_out += bytes_to_write;
+	stream->next_out += bytes_to_write;
+
+}
+
+static int write_deflate_header_stateless(struct isal_zstream *stream)
+{
+	struct isal_zstate *state = &stream->internal_state;
+	struct isal_hufftables *hufftables = stream->hufftables;
+	uint64_t hdr_extra_bits = hufftables->deflate_hdr[hufftables->deflate_hdr_count];
+	uint32_t count;
+
+	if (hufftables->deflate_hdr_count + 8 >= stream->avail_out)
+		return STATELESS_OVERFLOW;
+
+	memcpy(stream->next_out, hufftables->deflate_hdr, hufftables->deflate_hdr_count);
+
+	if (stream->end_of_stream == 0) {
+		if (hufftables->deflate_hdr_count > 0)
+			*stream->next_out -= 1;
+		else
+			hdr_extra_bits -= 1;
+	} else
+		state->has_eob_hdr = 1;
+
+	stream->avail_out -= hufftables->deflate_hdr_count;
+	stream->total_out += hufftables->deflate_hdr_count;
+	stream->next_out += hufftables->deflate_hdr_count;
+
+	set_buf(&state->bitbuf, stream->next_out, stream->avail_out);
+
+	write_bits(&state->bitbuf, hdr_extra_bits, hufftables->deflate_hdr_extra_bits);
+
+	count = buffer_used(&state->bitbuf);
+	stream->next_out = buffer_ptr(&state->bitbuf);
+	stream->avail_out -= count;
+	stream->total_out += count;
+
+	state->state = ZSTATE_BODY;
+
+	return COMP_OK;
+}
+
+static int write_deflate_header_unaligned_stateless(struct isal_zstream *stream)
+{
+	struct isal_zstate *state = &stream->internal_state;
+	struct isal_hufftables *hufftables = stream->hufftables;
+	unsigned int count;
+	uint64_t bit_count;
+	uint64_t *header_next;
+	uint64_t *header_end;
+	uint64_t header_bits;
+
+	if (state->bitbuf.m_bit_count == 0)
+		return write_deflate_header_stateless(stream);
+
+	if (hufftables->deflate_hdr_count + 16 >= stream->avail_out)
+		return STATELESS_OVERFLOW;
+
+	set_buf(&state->bitbuf, stream->next_out, stream->avail_out);
+
+	header_next = (uint64_t *) hufftables->deflate_hdr;
+	header_end = header_next + hufftables->deflate_hdr_count / 8;
+
+	header_bits = *header_next;
+
+	if (stream->end_of_stream == 0)
+		header_bits--;
+	else
+		state->has_eob_hdr = 1;
+
+	header_next++;
+
+	/* Write out Complete Header bits */
+	for (; header_next <= header_end; header_next++) {
+		write_bits(&state->bitbuf, header_bits, 32);
+		header_bits >>= 32;
+		write_bits(&state->bitbuf, header_bits, 32);
+		header_bits = *header_next;
+	}
+
+	bit_count =
+	    (hufftables->deflate_hdr_count & 0x7) * 8 + hufftables->deflate_hdr_extra_bits;
+
+	if (bit_count > MAX_BITBUF_BIT_WRITE) {
+		write_bits(&state->bitbuf, header_bits, MAX_BITBUF_BIT_WRITE);
+		header_bits >>= MAX_BITBUF_BIT_WRITE;
+		bit_count -= MAX_BITBUF_BIT_WRITE;
+
+	}
+
+	write_bits(&state->bitbuf, header_bits, bit_count);
+
+	/* check_space flushes extra bytes in bitbuf. Required because
+	 * write_bits_always fails when the next commit makes the buffer
+	 * length exceed 64 bits */
+	check_space(&state->bitbuf, FORCE_FLUSH);
+
+	count = buffer_used(&state->bitbuf);
+	stream->next_out = buffer_ptr(&state->bitbuf);
+	stream->avail_out -= count;
+	stream->total_out += count;
+
+	state->state = ZSTATE_BODY;
+
+	return COMP_OK;
+}
+
+/* Toggle end of stream only works when deflate header is aligned */
+void write_header(struct isal_zstream *stream, uint8_t * deflate_hdr,
+		  uint32_t deflate_hdr_count, uint32_t extra_bits_count, uint32_t next_state,
+		  uint32_t toggle_end_of_stream)
+{
+	struct isal_zstate *state = &stream->internal_state;
+	uint32_t hdr_extra_bits = deflate_hdr[deflate_hdr_count];
+	uint32_t count;
+	state->state = ZSTATE_HDR;
+
+	if (state->bitbuf.m_bit_count != 0) {
+		if (stream->avail_out < 8)
+			return;
+		set_buf(&state->bitbuf, stream->next_out, stream->avail_out);
+		flush(&state->bitbuf);
+		count = buffer_used(&state->bitbuf);
+		stream->next_out = buffer_ptr(&state->bitbuf);
+		stream->avail_out -= count;
+		stream->total_out += count;
+	}
+
+	if (stream->gzip_flag == IGZIP_GZIP)
+		write_gzip_header(stream);
+
+	count = deflate_hdr_count - state->count;
+
+	if (count != 0) {
+		if (count > stream->avail_out)
+			count = stream->avail_out;
+
+		memcpy(stream->next_out, deflate_hdr + state->count, count);
+
+		if (toggle_end_of_stream && state->count == 0 && count > 0) {
+			/* Assumes the final block bit is the first bit */
+			*stream->next_out ^= 1;
+			state->has_eob_hdr = !state->has_eob_hdr;
+		}
+
+		stream->next_out += count;
+		stream->avail_out -= count;
+		stream->total_out += count;
+		state->count += count;
+
+		count = deflate_hdr_count - state->count;
+	} else if (toggle_end_of_stream && deflate_hdr_count == 0) {
+		/* Assumes the final block bit is the first bit */
+		hdr_extra_bits ^= 1;
+		state->has_eob_hdr = !state->has_eob_hdr;
+	}
+
+	if ((count == 0) && (stream->avail_out >= 8)) {
+
+		set_buf(&state->bitbuf, stream->next_out, stream->avail_out);
+
+		write_bits(&state->bitbuf, hdr_extra_bits, extra_bits_count);
+
+		state->state = next_state;
+		state->count = 0;
+
+		count = buffer_used(&state->bitbuf);
+		stream->next_out = buffer_ptr(&state->bitbuf);
+		stream->avail_out -= count;
+		stream->total_out += count;
+	}
+
+}
+
+void write_trailer(struct isal_zstream *stream)
+{
+	struct isal_zstate *state = &stream->internal_state;
+	unsigned int bytes;
+	uint32_t crc = state->crc;
+
+	if (stream->avail_out >= 8) {
+		set_buf(&state->bitbuf, stream->next_out, stream->avail_out);
+
+		/* the flush() will pad to the next byte and write up to 8 bytes
+		 * to the output stream/buffer.
+		 */
+		if (!state->has_eob_hdr) {
+			/* If the final header has not been written, write a
+			 * final block. This block is a static huffman block
+			 * which only contains the end of block symbol. The code
+			 * that happens to do this is the fist 10 bits of
+			 * 0x003 */
+			state->has_eob_hdr = 1;
+			write_bits(&state->bitbuf, 0x003, 10);
+			if (is_full(&state->bitbuf)) {
+				stream->next_out = buffer_ptr(&state->bitbuf);
+				bytes = buffer_used(&state->bitbuf);
+				stream->avail_out -= bytes;
+				stream->total_out += bytes;
+				return;
+			}
+		}
+
+		flush(&state->bitbuf);
+		stream->next_out = buffer_ptr(&state->bitbuf);
+		bytes = buffer_used(&state->bitbuf);
+
+		if (stream->gzip_flag) {
+			if (!is_full(&state->bitbuf)) {
+				*(uint64_t *) stream->next_out =
+				    ((uint64_t) stream->total_in << 32) | crc;
+				stream->next_out += 8;
+				bytes += 8;
+				state->state = ZSTATE_END;
+			}
+		} else
+			state->state = ZSTATE_END;
+
+		stream->avail_out -= bytes;
+		stream->total_out += bytes;
+	}
+}