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Use a power of generator representation of GF(256) multiplication group

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to save space time and complexity.

	* grub-core/disk/raid6_recover.c (raid6_table1): Removed.
	(raid6_table2): Likewise.
	(powx): New array.
	(powx_inv): Likewise.
	(poly): New const.
	(grub_raid_block_mul): Replace with ...
	(grub_raid_block_mulx): ...this.
	(grub_raid6_init_table): Rewritten.
	(grub_raid6_recover): Use power of generator representation.
This commit is contained in:
Vladimir 'phcoder' Serbinenko 2011-11-04 13:27:50 +01:00
parent 09e2763fb1
commit 11ee4389e2
2 changed files with 42 additions and 54 deletions
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@ -1,3 +1,18 @@
2011-11-04 Vladimir Serbinenko <phcoder@gmail.com>
Use a power of generator representation of GF(256) multiplication group
to save space time and complexity.
* grub-core/disk/raid6_recover.c (raid6_table1): Removed.
(raid6_table2): Likewise.
(powx): New array.
(powx_inv): Likewise.
(poly): New const.
(grub_raid_block_mul): Replace with ...
(grub_raid_block_mulx): ...this.
(grub_raid6_init_table): Rewritten.
(grub_raid6_recover): Use power of generator representation.
2011-11-04 Vladimir Serbinenko <phcoder@gmail.com>
* grub-core/disk/raid6_recover.c (grub_raid6_recover): Get start_sector