Lines Matching +full:data +full:- +full:bits

1 /* SPDX-License-Identifier: GPL-2.0 */
13  * number of data bytes to add to the output buffer, or an index pointing
14  * to a previously-written number of data bytes to copy to the output buffer.
16  * The template code is a 5-bit value.  This code indicates what to do with
17  * the following data.  Template codes from 0 to 0x19 should use the template
20  * an arg following the template code bits.  Each action is either a "data"
25  * N0 (for which there is no corresponding arg in the compressed data buffer).
27  * "Data" actions, indicated in the table by D2, D4, and D8, mean that the
28  * corresponding arg is 2, 4, or 8 bytes, respectively, in the compressed data
35  * in a ring buffer that contains the last N bytes of output buffer data.
36  * The number of bits for each index's arg are: 8 bits for I2, 9 bits for I4,
37  * and 8 bits for I8.  Since each index points to a 2, 4, or 8 byte section,
38  * this means that I2 can reference 512 bytes ((2^8 bits = 256) * 2 bytes), I4
40  * bytes ((2^8 = 256) * 8 bytes).  Think of it as a kind-of ring buffer for
53  * "zeros" operation, which has no arg bits, writes 8 zeros to the output
54  * buffer.  The "end" operation, which also has no arg bits, signals the end
55  * of the compressed data.  There may be some number of padding (don't care,
56  * but usually 0) bits after the "end" operation bits, to fill the buffer
61  * 0x1d as a special "short data" template code, to represent less than 8 bytes
62  * of uncompressed data.  It is followed by a 3 bit arg N indicating how many
63  * data bytes will follow, and then N bytes of data, which should be copied to
66  * compressed buffers containing this sw-only template will be rejected by
69  * disable using this sw-only "short data" template, and instead simply
73  * code is in the next 5 bits.  The decompression ends once the "end" template
90 /* sw only template - this is not in the hw design; it's used only by this
96 /* additional bits of each op param */
127 /* the max of the regular templates - not including the special templates */