475 lines
14 KiB
C
475 lines
14 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/* Copyright (c) 2024, Vladimir Oltean <olteanv@gmail.com>
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* Copyright (c) 2024, Intel Corporation.
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*/
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#include <kunit/test.h>
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#include <linux/packing.h>
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struct packing_test_case {
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const char *desc;
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const u8 *pbuf;
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size_t pbuf_size;
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u64 uval;
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size_t start_bit;
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size_t end_bit;
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u8 quirks;
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};
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#define NO_QUIRKS 0
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/**
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* PBUF - Initialize .pbuf and .pbuf_size
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* @array: elements of constant physical buffer
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*
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* Initializes the .pbuf and .pbuf_size fields of a struct packing_test_case
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* with a constant array of the specified elements.
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*/
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#define PBUF(array...) \
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.pbuf = (const u8[]){ array }, \
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.pbuf_size = sizeof((const u8 []){ array })
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static const struct packing_test_case cases[] = {
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/* These tests pack and unpack a magic 64-bit value
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* (0xcafedeadbeefcafe) at a fixed logical offset (32) within an
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* otherwise zero array of 128 bits (16 bytes). They test all possible
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* bit layouts of the 128 bit buffer.
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*/
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{
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.desc = "no quirks, 16 bytes",
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PBUF(0x00, 0x00, 0x00, 0x00, 0xca, 0xfe, 0xde, 0xad,
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0xbe, 0xef, 0xca, 0xfe, 0x00, 0x00, 0x00, 0x00),
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.uval = 0xcafedeadbeefcafe,
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.start_bit = 95,
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.end_bit = 32,
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.quirks = NO_QUIRKS,
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},
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{
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.desc = "lsw32 first, 16 bytes",
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PBUF(0x00, 0x00, 0x00, 0x00, 0xbe, 0xef, 0xca, 0xfe,
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0xca, 0xfe, 0xde, 0xad, 0x00, 0x00, 0x00, 0x00),
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.uval = 0xcafedeadbeefcafe,
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.start_bit = 95,
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.end_bit = 32,
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.quirks = QUIRK_LSW32_IS_FIRST,
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},
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{
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.desc = "little endian words, 16 bytes",
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PBUF(0x00, 0x00, 0x00, 0x00, 0xad, 0xde, 0xfe, 0xca,
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0xfe, 0xca, 0xef, 0xbe, 0x00, 0x00, 0x00, 0x00),
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.uval = 0xcafedeadbeefcafe,
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.start_bit = 95,
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.end_bit = 32,
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.quirks = QUIRK_LITTLE_ENDIAN,
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},
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{
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.desc = "lsw32 first + little endian words, 16 bytes",
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PBUF(0x00, 0x00, 0x00, 0x00, 0xfe, 0xca, 0xef, 0xbe,
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0xad, 0xde, 0xfe, 0xca, 0x00, 0x00, 0x00, 0x00),
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.uval = 0xcafedeadbeefcafe,
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.start_bit = 95,
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.end_bit = 32,
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.quirks = QUIRK_LSW32_IS_FIRST | QUIRK_LITTLE_ENDIAN,
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},
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{
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.desc = "msb right, 16 bytes",
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PBUF(0x00, 0x00, 0x00, 0x00, 0x53, 0x7f, 0x7b, 0xb5,
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0x7d, 0xf7, 0x53, 0x7f, 0x00, 0x00, 0x00, 0x00),
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.uval = 0xcafedeadbeefcafe,
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.start_bit = 95,
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.end_bit = 32,
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.quirks = QUIRK_MSB_ON_THE_RIGHT,
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},
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{
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.desc = "msb right + lsw32 first, 16 bytes",
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PBUF(0x00, 0x00, 0x00, 0x00, 0x7d, 0xf7, 0x53, 0x7f,
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0x53, 0x7f, 0x7b, 0xb5, 0x00, 0x00, 0x00, 0x00),
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.uval = 0xcafedeadbeefcafe,
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.start_bit = 95,
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.end_bit = 32,
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.quirks = QUIRK_MSB_ON_THE_RIGHT | QUIRK_LSW32_IS_FIRST,
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},
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{
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.desc = "msb right + little endian words, 16 bytes",
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PBUF(0x00, 0x00, 0x00, 0x00, 0xb5, 0x7b, 0x7f, 0x53,
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0x7f, 0x53, 0xf7, 0x7d, 0x00, 0x00, 0x00, 0x00),
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.uval = 0xcafedeadbeefcafe,
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.start_bit = 95,
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.end_bit = 32,
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.quirks = QUIRK_MSB_ON_THE_RIGHT | QUIRK_LITTLE_ENDIAN,
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},
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{
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.desc = "msb right + lsw32 first + little endian words, 16 bytes",
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PBUF(0x00, 0x00, 0x00, 0x00, 0x7f, 0x53, 0xf7, 0x7d,
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0xb5, 0x7b, 0x7f, 0x53, 0x00, 0x00, 0x00, 0x00),
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.uval = 0xcafedeadbeefcafe,
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.start_bit = 95,
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.end_bit = 32,
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.quirks = QUIRK_MSB_ON_THE_RIGHT | QUIRK_LSW32_IS_FIRST | QUIRK_LITTLE_ENDIAN,
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},
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/* These tests pack and unpack a magic 64-bit value
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* (0xcafedeadbeefcafe) at a fixed logical offset (32) within an
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* otherwise zero array of varying size from 18 bytes to 24 bytes.
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*/
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{
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.desc = "no quirks, 18 bytes",
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PBUF(0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xca, 0xfe,
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0xde, 0xad, 0xbe, 0xef, 0xca, 0xfe, 0x00, 0x00,
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0x00, 0x00),
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.uval = 0xcafedeadbeefcafe,
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.start_bit = 95,
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.end_bit = 32,
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.quirks = NO_QUIRKS,
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},
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{
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.desc = "no quirks, 19 bytes",
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PBUF(0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xca,
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0xfe, 0xde, 0xad, 0xbe, 0xef, 0xca, 0xfe, 0x00,
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0x00, 0x00, 0x00),
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.uval = 0xcafedeadbeefcafe,
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.start_bit = 95,
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.end_bit = 32,
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.quirks = NO_QUIRKS,
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},
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{
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.desc = "no quirks, 20 bytes",
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PBUF(0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0xca, 0xfe, 0xde, 0xad, 0xbe, 0xef, 0xca, 0xfe,
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0x00, 0x00, 0x00, 0x00),
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.uval = 0xcafedeadbeefcafe,
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.start_bit = 95,
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.end_bit = 32,
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.quirks = NO_QUIRKS,
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},
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{
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.desc = "no quirks, 22 bytes",
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PBUF(0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0xca, 0xfe, 0xde, 0xad, 0xbe, 0xef,
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0xca, 0xfe, 0x00, 0x00, 0x00, 0x00),
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.uval = 0xcafedeadbeefcafe,
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.start_bit = 95,
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.end_bit = 32,
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.quirks = NO_QUIRKS,
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},
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{
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.desc = "no quirks, 24 bytes",
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PBUF(0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0xca, 0xfe, 0xde, 0xad,
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0xbe, 0xef, 0xca, 0xfe, 0x00, 0x00, 0x00, 0x00),
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.uval = 0xcafedeadbeefcafe,
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.start_bit = 95,
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.end_bit = 32,
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.quirks = NO_QUIRKS,
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},
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{
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.desc = "lsw32 first + little endian words, 18 bytes",
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PBUF(0x00, 0x00, 0x00, 0x00, 0xfe, 0xca, 0xef, 0xbe,
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0xad, 0xde, 0xfe, 0xca, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00),
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.uval = 0xcafedeadbeefcafe,
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.start_bit = 95,
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.end_bit = 32,
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.quirks = QUIRK_LSW32_IS_FIRST | QUIRK_LITTLE_ENDIAN,
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},
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{
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.desc = "lsw32 first + little endian words, 19 bytes",
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PBUF(0x00, 0x00, 0x00, 0x00, 0xfe, 0xca, 0xef, 0xbe,
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0xad, 0xde, 0xfe, 0xca, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00),
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.uval = 0xcafedeadbeefcafe,
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.start_bit = 95,
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.end_bit = 32,
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.quirks = QUIRK_LSW32_IS_FIRST | QUIRK_LITTLE_ENDIAN,
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},
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{
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.desc = "lsw32 first + little endian words, 20 bytes",
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PBUF(0x00, 0x00, 0x00, 0x00, 0xfe, 0xca, 0xef, 0xbe,
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0xad, 0xde, 0xfe, 0xca, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00),
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.uval = 0xcafedeadbeefcafe,
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.start_bit = 95,
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.end_bit = 32,
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.quirks = QUIRK_LSW32_IS_FIRST | QUIRK_LITTLE_ENDIAN,
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},
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{
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.desc = "lsw32 first + little endian words, 22 bytes",
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PBUF(0x00, 0x00, 0x00, 0x00, 0xfe, 0xca, 0xef, 0xbe,
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0xad, 0xde, 0xfe, 0xca, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00),
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.uval = 0xcafedeadbeefcafe,
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.start_bit = 95,
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.end_bit = 32,
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.quirks = QUIRK_LSW32_IS_FIRST | QUIRK_LITTLE_ENDIAN,
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},
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{
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.desc = "lsw32 first + little endian words, 24 bytes",
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PBUF(0x00, 0x00, 0x00, 0x00, 0xfe, 0xca, 0xef, 0xbe,
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0xad, 0xde, 0xfe, 0xca, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00),
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.uval = 0xcafedeadbeefcafe,
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.start_bit = 95,
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.end_bit = 32,
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.quirks = QUIRK_LSW32_IS_FIRST | QUIRK_LITTLE_ENDIAN,
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},
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/* These tests pack and unpack a magic 64-bit value
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* (0x1122334455667788) at an odd starting bit (43) within an
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* otherwise zero array of 128 bits (16 bytes). They test all possible
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* bit layouts of the 128 bit buffer.
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*/
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{
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.desc = "no quirks, 16 bytes, non-aligned",
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PBUF(0x00, 0x00, 0x00, 0x89, 0x11, 0x9a, 0x22, 0xab,
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0x33, 0xbc, 0x40, 0x00, 0x00, 0x00, 0x00, 0x00),
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.uval = 0x1122334455667788,
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.start_bit = 106,
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.end_bit = 43,
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.quirks = NO_QUIRKS,
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},
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{
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.desc = "lsw32 first, 16 bytes, non-aligned",
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PBUF(0x00, 0x00, 0x00, 0x00, 0x33, 0xbc, 0x40, 0x00,
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0x11, 0x9a, 0x22, 0xab, 0x00, 0x00, 0x00, 0x89),
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.uval = 0x1122334455667788,
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.start_bit = 106,
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.end_bit = 43,
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.quirks = QUIRK_LSW32_IS_FIRST,
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},
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{
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.desc = "little endian words, 16 bytes, non-aligned",
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PBUF(0x89, 0x00, 0x00, 0x00, 0xab, 0x22, 0x9a, 0x11,
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0x00, 0x40, 0xbc, 0x33, 0x00, 0x00, 0x00, 0x00),
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.uval = 0x1122334455667788,
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.start_bit = 106,
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.end_bit = 43,
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.quirks = QUIRK_LITTLE_ENDIAN,
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},
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{
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.desc = "lsw32 first + little endian words, 16 bytes, non-aligned",
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PBUF(0x00, 0x00, 0x00, 0x00, 0x00, 0x40, 0xbc, 0x33,
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0xab, 0x22, 0x9a, 0x11, 0x89, 0x00, 0x00, 0x00),
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.uval = 0x1122334455667788,
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.start_bit = 106,
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.end_bit = 43,
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.quirks = QUIRK_LSW32_IS_FIRST | QUIRK_LITTLE_ENDIAN,
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},
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{
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.desc = "msb right, 16 bytes, non-aligned",
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PBUF(0x00, 0x00, 0x00, 0x91, 0x88, 0x59, 0x44, 0xd5,
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0xcc, 0x3d, 0x02, 0x00, 0x00, 0x00, 0x00, 0x00),
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.uval = 0x1122334455667788,
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.start_bit = 106,
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.end_bit = 43,
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.quirks = QUIRK_MSB_ON_THE_RIGHT,
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},
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{
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.desc = "msb right + lsw32 first, 16 bytes, non-aligned",
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PBUF(0x00, 0x00, 0x00, 0x00, 0xcc, 0x3d, 0x02, 0x00,
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0x88, 0x59, 0x44, 0xd5, 0x00, 0x00, 0x00, 0x91),
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.uval = 0x1122334455667788,
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.start_bit = 106,
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.end_bit = 43,
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.quirks = QUIRK_MSB_ON_THE_RIGHT | QUIRK_LSW32_IS_FIRST,
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},
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{
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.desc = "msb right + little endian words, 16 bytes, non-aligned",
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PBUF(0x91, 0x00, 0x00, 0x00, 0xd5, 0x44, 0x59, 0x88,
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0x00, 0x02, 0x3d, 0xcc, 0x00, 0x00, 0x00, 0x00),
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.uval = 0x1122334455667788,
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.start_bit = 106,
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.end_bit = 43,
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.quirks = QUIRK_MSB_ON_THE_RIGHT | QUIRK_LITTLE_ENDIAN,
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},
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{
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.desc = "msb right + lsw32 first + little endian words, 16 bytes, non-aligned",
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PBUF(0x00, 0x00, 0x00, 0x00, 0x00, 0x02, 0x3d, 0xcc,
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0xd5, 0x44, 0x59, 0x88, 0x91, 0x00, 0x00, 0x00),
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.uval = 0x1122334455667788,
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.start_bit = 106,
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.end_bit = 43,
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.quirks = QUIRK_MSB_ON_THE_RIGHT | QUIRK_LSW32_IS_FIRST | QUIRK_LITTLE_ENDIAN,
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},
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/* These tests pack and unpack a u64 with all bits set
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* (0xffffffffffffffff) at an odd starting bit (43) within an
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* otherwise zero array of 128 bits (16 bytes). They test all possible
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* bit layouts of the 128 bit buffer.
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*/
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{
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.desc = "no quirks, 16 bytes, non-aligned, 0xff",
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PBUF(0x00, 0x00, 0x07, 0xff, 0xff, 0xff, 0xff, 0xff,
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0xff, 0xff, 0xf8, 0x00, 0x00, 0x00, 0x00, 0x00),
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.uval = 0xffffffffffffffff,
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.start_bit = 106,
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.end_bit = 43,
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.quirks = NO_QUIRKS,
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},
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{
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.desc = "lsw32 first, 16 bytes, non-aligned, 0xff",
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PBUF(0x00, 0x00, 0x00, 0x00, 0xff, 0xff, 0xf8, 0x00,
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0xff, 0xff, 0xff, 0xff, 0x00, 0x00, 0x07, 0xff),
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.uval = 0xffffffffffffffff,
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.start_bit = 106,
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.end_bit = 43,
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.quirks = QUIRK_LSW32_IS_FIRST,
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},
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{
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.desc = "little endian words, 16 bytes, non-aligned, 0xff",
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PBUF(0xff, 0x07, 0x00, 0x00, 0xff, 0xff, 0xff, 0xff,
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0x00, 0xf8, 0xff, 0xff, 0x00, 0x00, 0x00, 0x00),
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.uval = 0xffffffffffffffff,
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.start_bit = 106,
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.end_bit = 43,
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.quirks = QUIRK_LITTLE_ENDIAN,
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},
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{
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.desc = "lsw32 first + little endian words, 16 bytes, non-aligned, 0xff",
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PBUF(0x00, 0x00, 0x00, 0x00, 0x00, 0xf8, 0xff, 0xff,
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0xff, 0xff, 0xff, 0xff, 0xff, 0x07, 0x00, 0x00),
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.uval = 0xffffffffffffffff,
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.start_bit = 106,
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.end_bit = 43,
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.quirks = QUIRK_LSW32_IS_FIRST | QUIRK_LITTLE_ENDIAN,
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},
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{
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.desc = "msb right, 16 bytes, non-aligned, 0xff",
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PBUF(0x00, 0x00, 0xe0, 0xff, 0xff, 0xff, 0xff, 0xff,
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0xff, 0xff, 0x1f, 0x00, 0x00, 0x00, 0x00, 0x00),
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.uval = 0xffffffffffffffff,
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.start_bit = 106,
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.end_bit = 43,
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.quirks = QUIRK_MSB_ON_THE_RIGHT,
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},
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{
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.desc = "msb right + lsw32 first, 16 bytes, non-aligned, 0xff",
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PBUF(0x00, 0x00, 0x00, 0x00, 0xff, 0xff, 0x1f, 0x00,
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0xff, 0xff, 0xff, 0xff, 0x00, 0x00, 0xe0, 0xff),
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.uval = 0xffffffffffffffff,
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.start_bit = 106,
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.end_bit = 43,
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.quirks = QUIRK_MSB_ON_THE_RIGHT | QUIRK_LSW32_IS_FIRST,
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},
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{
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.desc = "msb right + little endian words, 16 bytes, non-aligned, 0xff",
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PBUF(0xff, 0xe0, 0x00, 0x00, 0xff, 0xff, 0xff, 0xff,
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0x00, 0x1f, 0xff, 0xff, 0x00, 0x00, 0x00, 0x00),
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.uval = 0xffffffffffffffff,
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.start_bit = 106,
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.end_bit = 43,
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.quirks = QUIRK_MSB_ON_THE_RIGHT | QUIRK_LITTLE_ENDIAN,
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},
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{
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.desc = "msb right + lsw32 first + little endian words, 16 bytes, non-aligned, 0xff",
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PBUF(0x00, 0x00, 0x00, 0x00, 0x00, 0x1f, 0xff, 0xff,
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0xff, 0xff, 0xff, 0xff, 0xff, 0xe0, 0x00, 0x00),
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.uval = 0xffffffffffffffff,
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.start_bit = 106,
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.end_bit = 43,
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.quirks = QUIRK_MSB_ON_THE_RIGHT | QUIRK_LSW32_IS_FIRST | QUIRK_LITTLE_ENDIAN,
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},
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};
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KUNIT_ARRAY_PARAM_DESC(packing, cases, desc);
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static void packing_test_pack(struct kunit *test)
|
|
{
|
|
const struct packing_test_case *params = test->param_value;
|
|
u8 *pbuf;
|
|
int err;
|
|
|
|
pbuf = kunit_kzalloc(test, params->pbuf_size, GFP_KERNEL);
|
|
KUNIT_ASSERT_NOT_NULL(test, pbuf);
|
|
|
|
err = pack(pbuf, params->uval, params->start_bit, params->end_bit,
|
|
params->pbuf_size, params->quirks);
|
|
|
|
KUNIT_EXPECT_EQ_MSG(test, err, 0, "pack() returned %pe\n", ERR_PTR(err));
|
|
KUNIT_EXPECT_MEMEQ(test, pbuf, params->pbuf, params->pbuf_size);
|
|
}
|
|
|
|
static void packing_test_unpack(struct kunit *test)
|
|
{
|
|
const struct packing_test_case *params = test->param_value;
|
|
u64 uval;
|
|
int err;
|
|
|
|
err = unpack(params->pbuf, &uval, params->start_bit, params->end_bit,
|
|
params->pbuf_size, params->quirks);
|
|
KUNIT_EXPECT_EQ_MSG(test, err, 0, "unpack() returned %pe\n", ERR_PTR(err));
|
|
KUNIT_EXPECT_EQ(test, uval, params->uval);
|
|
}
|
|
|
|
#define PACKED_BUF_SIZE 8
|
|
|
|
typedef struct __packed { u8 buf[PACKED_BUF_SIZE]; } packed_buf_t;
|
|
|
|
struct test_data {
|
|
u32 field3;
|
|
u16 field2;
|
|
u16 field4;
|
|
u16 field6;
|
|
u8 field1;
|
|
u8 field5;
|
|
};
|
|
|
|
static const struct packed_field_u8 test_fields[] = {
|
|
PACKED_FIELD(63, 61, struct test_data, field1),
|
|
PACKED_FIELD(60, 52, struct test_data, field2),
|
|
PACKED_FIELD(51, 28, struct test_data, field3),
|
|
PACKED_FIELD(27, 14, struct test_data, field4),
|
|
PACKED_FIELD(13, 9, struct test_data, field5),
|
|
PACKED_FIELD(8, 0, struct test_data, field6),
|
|
};
|
|
|
|
static void packing_test_pack_fields(struct kunit *test)
|
|
{
|
|
const struct test_data data = {
|
|
.field1 = 0x2,
|
|
.field2 = 0x100,
|
|
.field3 = 0xF00050,
|
|
.field4 = 0x7D3,
|
|
.field5 = 0x9,
|
|
.field6 = 0x10B,
|
|
};
|
|
packed_buf_t expect = {
|
|
.buf = { 0x50, 0x0F, 0x00, 0x05, 0x01, 0xF4, 0xD3, 0x0B },
|
|
};
|
|
packed_buf_t buf = {};
|
|
|
|
pack_fields(&buf, sizeof(buf), &data, test_fields, 0);
|
|
|
|
KUNIT_EXPECT_MEMEQ(test, &expect, &buf, sizeof(buf));
|
|
}
|
|
|
|
static void packing_test_unpack_fields(struct kunit *test)
|
|
{
|
|
const packed_buf_t buf = {
|
|
.buf = { 0x17, 0x28, 0x10, 0x19, 0x3D, 0xA9, 0x07, 0x9C },
|
|
};
|
|
struct test_data data = {};
|
|
|
|
unpack_fields(&buf, sizeof(buf), &data, test_fields, 0);
|
|
|
|
KUNIT_EXPECT_EQ(test, 0, data.field1);
|
|
KUNIT_EXPECT_EQ(test, 0x172, data.field2);
|
|
KUNIT_EXPECT_EQ(test, 0x810193, data.field3);
|
|
KUNIT_EXPECT_EQ(test, 0x36A4, data.field4);
|
|
KUNIT_EXPECT_EQ(test, 0x3, data.field5);
|
|
KUNIT_EXPECT_EQ(test, 0x19C, data.field6);
|
|
}
|
|
|
|
static struct kunit_case packing_test_cases[] = {
|
|
KUNIT_CASE_PARAM(packing_test_pack, packing_gen_params),
|
|
KUNIT_CASE_PARAM(packing_test_unpack, packing_gen_params),
|
|
KUNIT_CASE(packing_test_pack_fields),
|
|
KUNIT_CASE(packing_test_unpack_fields),
|
|
{},
|
|
};
|
|
|
|
static struct kunit_suite packing_test_suite = {
|
|
.name = "packing",
|
|
.test_cases = packing_test_cases,
|
|
};
|
|
|
|
kunit_test_suite(packing_test_suite);
|
|
|
|
MODULE_LICENSE("GPL");
|
|
MODULE_DESCRIPTION("KUnit tests for packing library");
|