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author | Lutz Jänicke <jaenicke@openssl.org> | 2003-01-14 13:56:26 +0000 |
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committer | Lutz Jänicke <jaenicke@openssl.org> | 2003-01-14 13:56:26 +0000 |
commit | 96f2552c8a1b88b430f4586f9fe38cf0f9ee22fb (patch) | |
tree | 53088a5a41bdfe58c011172dc7fb8b89eadf8790 /PROBLEMS | |
parent | e5658b9331d423b2bd57639bf020392c035f4182 (diff) |
Document hpux-parisc2-cc problems, probably due to optimizer bug.
PR: 426
Diffstat (limited to 'PROBLEMS')
-rw-r--r-- | PROBLEMS | 19 |
1 files changed, 19 insertions, 0 deletions
@@ -70,3 +70,22 @@ if compiled with WorkShop 6 compiler and -xarch=v9. The cause for this seems to be the fact that compiler emits multiplication to perform shift operations:-( To work the problem around configure with './Configure solaris64-sparcv9-cc -DMD32_REG_T=int'. + +* Problems with hp-parisc2-cc target when used with "no-asm" flag + +When using the hp-parisc2-cc target, wrong bignum code is generated. +This is due to the SIXTY_FOUR_BIT build being compiled with the +O3 +aggressive optimization. +The problem manifests itself by the BN_kronecker test hanging in an +endless loop. Reason: the BN_kronecker test calls BN_generate_prime() +which itself hangs. The reason could be tracked down to the bn_mul_comba8() +function in bn_asm.c. At some occasions the higher 32bit value of r[7] +is off by 1 (meaning: calculated=shouldbe+1). Further analysis failed, +as no debugger support possible at +O3 and additional fprintf()'s +introduced fixed the bug, therefore it is most likely a bug in the +optimizer. +The bug was found in the BN_kronecker test but may also lead to +failures in other parts of the code. +(See Ticket #426.) + +Workaround: modify the target to +O2 when building with no-asm. |