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Use static allocation rather than scratch pointer in reed_solomon.

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It decreases its size significantly and avoids a variable in .text.

	* grub-core/lib/reed_solomon.c (scratch): Removed.
	(chosenstat): New const or static array.
	(sigma): Likewise.
	(errpot): Likewise.
	(errpos): Likewise.
	(sy): Likewise.
	(mstat): Likewise.
	(errvals): Likewise.
	(eqstat): Likewise.
	(pol_evaluate): Replace x with log_x argument. All users updated.
	(syndroms): Removed.
	(gauss_solve): Use statically allocated arrays.
	(rs_recover): Likewise.
	Calculate syndroms directly.
	(decode_block): Use statically allocated arrays.
	(grub_reed_solomon_add_redundancy) [TEST]: Fix -DTEST compilation.
	(main) [TEST]: Allow -DTEST -DSTANDALONE.
This commit is contained in:
Vladimir 'phcoder' Serbinenko 2012-01-24 14:49:31 +01:00
parent 2e13ede59e
commit bb26e4ff16
2 changed files with 87 additions and 173 deletions
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ChangeLog
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@ -1,3 +1,26 @@
2012-01-24 Vladimir Serbinenko <phcoder@gmail.com>
Use static allocation rather than scratch pointer in reed_solomon.
It decreases its size significantly and avoids a variable in .text.
* grub-core/lib/reed_solomon.c (scratch): Removed.
(chosenstat): New const or static array.
(sigma): Likewise.
(errpot): Likewise.
(errpos): Likewise.
(sy): Likewise.
(mstat): Likewise.
(errvals): Likewise.
(eqstat): Likewise.
(pol_evaluate): Replace x with log_x argument. All users updated.
(syndroms): Removed.
(gauss_solve): Use statically allocated arrays.
(rs_recover): Likewise.
Calculate syndroms directly.
(decode_block): Use statically allocated arrays.
(grub_reed_solomon_add_redundancy) [TEST]: Fix -DTEST compilation.
(main) [TEST]: Allow -DTEST -DSTANDALONE.
2012-01-24 Vladimir Serbinenko <phcoder@gmail.com>
Eliminate fixed limit on reed solomon decoder length.