Mercurial > dropbear
annotate tomsfastmath/changes.txt @ 647:939cd3e22c87 dropbear-tfm
- Fix constraints so we don't get warned about uninitialised
variable (it isn't used as input by the asm)
author | Matt Johnston <matt@ucc.asn.au> |
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date | Wed, 30 Nov 2011 23:15:21 +0800 |
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1 March 14th, 2007 |
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2 0.12 -- Christophe Devine contributed MIPS asm w00t |
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3 ++ quick release to get the MIPS code out there |
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4 |
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5 March 10th, 2007 |
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6 0.11 -- re-org'ed the source tree, it's cooler now |
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7 -- cleaned up mul/sqr so there is only one file per unit, should help building with older compilers and/or on slower boxes |
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8 -- [CRI] optimized fp_read_unsigned_bin |
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9 -- fixed -0 ... again ... I now have less hair on my head. |
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10 -- [CRI] renamed bn_reverse() -> fp_reverse() |
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11 |
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12 November 1st, 2006 |
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13 0.10 -- Unrolled Montgomery for 1..16 digits with TFM_SMALL_MONT_SET between 10% and 25% speedup depending on size. |
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14 -- fixed fp_sqr_comba.c so it builds in ISO C mode [Andreas Lange] |
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15 -- [email protected] pointed out fp_radix_size() had a few typos that affected correctness. Fixed. |
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16 -- Added support for ECC performance, e.g. define "-DTFM_ALREADY_SET -DTFM_ECC192" and it will disable |
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17 all of the unrolled code EXCEPT what is required for ECC P-192. It autodetects 32/64-bit platforms too. It's super neato. |
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18 Support for 192, 224, 256, 384 and 521 bit curves through the defines [see tfm.h] |
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19 -- AVR32 support added, define TFM_AVR32 to enable |
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20 |
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21 April 4th, 2006 |
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22 0.09 -- Bruce Guenter suggested I use --tag=CC for libtool builds where the compiler may think it's C++. |
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23 -- Added support for k=1 in exptmod for RSA exponents. Makes it more competitive with other libraries |
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24 -- added cutoffs to the comba32 sqr/mul code to better handle 640, 786 and 896 bit operands (e.g. for RSA-1280, RSA-1536 and RSA-1792), really no effect |
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25 for 64-bit boxes as these represent 1280, 1536 and 1792 bit operands (not likely to be invoked). |
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26 -- Removed karatsuba from the mul/sqr since they're not useful and slow. |
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27 -- added 20, 24 and 28 digit multipliers for oddsized RSA support. You can easily disable them by uncommenting the TFM_SQRXX and TFM_MULXX lines in |
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28 tfm.h to save space. Now GMP and TFM are roughly the same speed on the Pentium-M for RSA with LTC. |
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29 -- unrolled SSE2 code and optimize for platforms with load/store pipes (e.g. can store and load in a cycle). Got 4% or so boost on my Dothan laptop (marginal improvement on a P4 Prescott) |
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30 |
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31 Jan 26th, 2006 |
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32 0.08 -- Fixed a bug in the generic mult/sqr where we overflowed by one digit |
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33 |
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34 November 18th, 2005 |
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35 0.07 -- Fixes to fp_mul and fp_sqr to clean up the handling of the defines, fix to tfm.h to also clear up the prototypes. |
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36 -- Updates to build and run on a IBM PPC 405 [using GCC 3.4.4] |
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37 -- Made the "make" command renamable in the build system |
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38 |
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39 October 31st, 2005 |
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40 0.06 -- fixed fp_mul() and fp_sqr() to trim digits when overflows would occur. Produces numerically inprecise results |
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41 (e.g. the lower FP_SIZE digits) but shouldn't segfault at least ;-) |
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42 -- Updated the combas so you can turn on and off specific unrolled loops at build time |
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43 -- Michael Heyman reported a bug in s_fp_sub() that was pretty substantial and a bug in fp_montgomery_calc_normalization(). Fixed. |
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44 |
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45 August 1st, 2005 |
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46 0.05 -- Quick fix to the fp_invmod.c code to let it handle even moduli [required for LTC] |
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47 -- Added makefile.shared to make shared objects [required for LTC] |
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48 -- Improved makefiles to make them way more configurable |
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49 -- Added timing resistant fp_exptmod() enabled with TFM_TIMING_RESISTANT |
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50 |
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51 July 23rd, 2005 |
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52 0.04 -- Fixed bugs in the SSE2 squaring code |
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53 -- Rewrote the multipliers to be optimized for small inputs |
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54 -- Nelson Bolyard of the NSS crew submitted [among other things] new faster Montgomery reduction |
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55 code. It brings the performance for small numbers on the AMD64 and all numbers on the P4 |
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56 to a new level. Thanks! |
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57 -- Added missing ARM support for fp_montgomery_reduce.c that the NSS folk left off, Officially |
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58 the ARM code is for v4 and above WITH the "M" multiplier support (e.g. umlal instruction) |
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59 -- Added PPC32 support, define TFM_PPC32 to enable it, I used the "PowerPC 6xx" instruction |
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60 databook for reference. Does not require altivec. Should be fairly portable to the other |
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61 32-bit PPCs provided they have mullw and mulhwu instructions. |
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62 [Note: porting the macros to PPC64 should be trivial, anyone with a shell to lend... email me!] |
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63 -- Rewrote the config a bit in tfm.h so you can better choose which set of "oh my god that's huge" code to |
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64 enable for your task. "generic" functions are ALWAYS included which are smaller but will cover the |
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65 gaps in the coverage for ya. |
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66 -- The PPC32 code has been verified to function on a Darwin box running GCC 2.95.2 |
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67 [Thanks to the folk at PeerSec for lending me a shell to use] |
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68 -- Fixed a bug in fp_exptmod() where if the exponent was negative AND the destination the output |
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69 would have the sign set to FP_NEG. |
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70 |
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71 March 1st, 2005 |
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72 0.03 -- Optimized squaring |
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73 -- Applied new license header to all files (still PD) |
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74 |
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75 September 18th, 2004 |
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76 0.02 -- Added TFM_LARGE to turn on/off 16x combas to save even more space. |
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77 This also helps prevent killing the cache on smaller cpus. |
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78 -- Cast memset to void in fp_init() to catch people who misuse the function (e.g. expect return) |
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79 Thanks to Johan Lindh |
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80 -- Cleaned up x86-64 support [faster montgomery reductions] |
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81 -- Autodetects x86-32 and x86-64 and enables it's asm now |
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82 -- Made test demo build cleaner in multilib platforms [e.g. mixed 32/64 bits] |
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83 -- Fix to fp_mod to ensure that remainder is of the same sign as the modulus. |
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84 -- Fixed bug in fp_montgomery_calc_normalization for single digit moduli |
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85 -- cleaned up ISO C macros in comba/mont to avoid branches [works best with GCC 3.4.x branch] |
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86 -- Added more testing to tfm.h to help detect misconfigured builds |
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87 -- Added TFM_NO_ASM which forces ASM off [even if it was autodetected]. |
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88 -- Added fp_radix_size() to API |
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89 -- Cleaned up demo/test.c to build with far fewer warnings (mostly %d => %lu fixes) |
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90 -- fp_exptmod() now supports negative exponent and base>modulus cases |
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91 -- Added fp_ident() which gives a string showing how TFM was configured. Useful for debuging... |
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92 -- fix gen.pl script so it includes the whole source tree now |
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93 |
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94 August 25th, 2004 |
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95 0.01 -- Initial Release |