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Be less specific about memory usage predictions

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Hanno Becker 2017-06-19 16:33:58 +01:00
parent ad049a973c
commit 08a5c18773
2 changed files with 4 additions and 4 deletions
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ChangeLog
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@ -20,7 +20,7 @@ Bugfix
Features
* Add option MBEDTLS_AES_FEWER_TABLES to dynamically compute 3/4 of the AES tables
during runtime, thereby reducing the RAM/ROM footprint by 6144 bytes. Suggested
during runtime, thereby reducing the RAM/ROM footprint by ~6kb. Suggested
and contributed by jkivilin in #394.
Changes

6
include/mbedtls/config.h
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@ -387,8 +387,8 @@
* Comment this macro to generate AES tables in RAM at runtime.
*
* Tradeoff: Using precomputed ROM tables reduces the time to setup
* an AES context but comes at the cost of additional 8192b ROM use
* (resp. 2048b if \c MBEDTLS_AES_FEWER_TABLES below is used).
* an AES context but comes at the cost of additional ~8kb ROM use
* (resp. ~2kb if \c MBEDTLS_AES_FEWER_TABLES below is used).
*
* This option is independent of \c MBEDTLS_AES_FEWER_TABLES.
*
@ -406,7 +406,7 @@
* (the tables are entry-wise rotations of one another).
*
* Tradeoff: Uncommenting this reduces the RAM / ROM footprint
* by 6144b but at the cost of more arithmetic operations during
* by ~6kb but at the cost of more arithmetic operations during
* runtime. Specifically, one has to compare 4 accesses within
* different tables to 4 accesses with additional arithmetic
* operations within the same table. The performance gain/loss