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| author | Jussi Kivilinna <jussi.kivilinna@iki.fi> | 2013-08-14 17:10:00 +0300 |
|---|---|---|
| committer | Jussi Kivilinna <jussi.kivilinna@iki.fi> | 2013-08-14 17:10:00 +0300 |
| commit | f365961422f1c8b3d89b8bcd9c99828f38c1f158 (patch) | |
| tree | 4475f62d7c1d9c454dabd254263e1cab3ea7224b /configure.ac | |
| parent | 2b5bbe264fcd61e5e458e5f71a6507ba0271c729 (diff) | |
| download | libgcrypt-f365961422f1c8b3d89b8bcd9c99828f38c1f158.tar.gz | |
rijndael: add ARMv6 assembly implementation
* cipher/Makefile.am: Add 'rijndael-armv6.S'.
* cipher/rijndael-armv6.S: New file.
* cipher/rijndael.c (USE_ARMV6_ASM): New macro.
[USE_ARMV6_ASM] (_gcry_aes_armv6_encrypt_block)
(_gcry_aes_armv6_decrypt_block): New prototypes.
(do_encrypt_aligned) [USE_ARMV6_ASM]: Use ARMv6 assembly function.
(do_encrypt): Disable input/output alignment when USE_ARMV6_ASM.
(do_decrypt_aligned) [USE_ARMV6_ASM]: Use ARMv6 assembly function.
(do_decrypt): Disable input/output alignment when USE_ARMV6_ASM.
* configure.ac (HAVE_COMPATIBLE_GCC_ARM_PLATFORM_AS): New check for
gcc/as compatibility with ARM assembly implementations.
(aes) [arm]: Add 'rijndael-armv6.lo'.
--
Add optimized ARMv6 assembly implementation for AES. Implementation is tuned
for Cortex-A8. Unaligned access handling is done in assembly part.
For now, only enable this on little-endian systems as big-endian correctness
have not been tested yet.
Old vs new. Cortex-A8 (on Debian Wheezy/armhf):
ECB/Stream CBC CFB OFB CTR
--------------- --------------- --------------- --------------- ---------------
AES 2.61x 3.12x 2.16x 2.59x 2.26x 2.25x 2.08x 2.08x 2.23x 2.23x
AES192 2.60x 3.06x 2.18x 2.65x 2.29x 2.29x 2.12x 2.12x 2.25x 2.27x
AES256 2.62x 3.09x 2.24x 2.72x 2.30x 2.34x 2.17x 2.19x 2.32x 2.32x
Signed-off-by: Jussi Kivilinna <jussi.kivilinna@iki.fi>
Diffstat (limited to 'configure.ac')
| -rw-r--r-- | configure.ac | 32 |
1 files changed, 32 insertions, 0 deletions
diff --git a/configure.ac b/configure.ac index 06c0b790..04dee7e2 100644 --- a/configure.ac +++ b/configure.ac @@ -964,6 +964,34 @@ if test "$gcry_cv_gcc_amd64_platform_as_ok" = "yes" ; then fi +# +# Check whether GCC assembler supports features needed for our ARM +# implementations +# +AC_CACHE_CHECK([whether GCC assembler is compatible for ARM assembly implementations], + [gcry_cv_gcc_arm_platform_as_ok], + [gcry_cv_gcc_arm_platform_as_ok=no + AC_COMPILE_IFELSE([AC_LANG_SOURCE( + [[__asm__( + /* Test if assembler supports UAL syntax. */ + ".syntax unified\n\t" + ".thumb\n\t" /* thumb-2 in UAL, thumb-1 otherwise. */ + ".code 16\n\t" + /* Following causes error if assembler ignored '.syntax unified'. */ + "asmfunc:\n\t" + "add.w %r0, %r4, %r8, ror #12;\n\t" + + /* Test if '.type' and '.size' are supported. */ + ".size asmfunc,.-asmfunc;\n\t" + ".type asmfunc,%function;\n\t" + );]])], + [gcry_cv_gcc_arm_platform_as_ok=yes])]) +if test "$gcry_cv_gcc_arm_platform_as_ok" = "yes" ; then + AC_DEFINE(HAVE_COMPATIBLE_GCC_ARM_PLATFORM_AS,1, + [Defined if underlying assembler is compatible with ARM assembly implementations]) +fi + + ####################################### #### Checks for library functions. #### ####################################### @@ -1284,6 +1312,10 @@ if test "$found" = "1" ; then # Build with the assembly implementation GCRYPT_CIPHERS="$GCRYPT_CIPHERS rijndael-amd64.lo" ;; + arm*-*-*) + # Build with the assembly implementation + GCRYPT_CIPHERS="$GCRYPT_CIPHERS rijndael-armv6.lo" + ;; esac fi |