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Postings from March 2003
-----BEGIN PGP SIGNED MESSAGE----- Moin, On 03-Mar-03 Enache Adrian carved into stone: > On Sun, Mar 02, 2003 at 06:01:40PM +0100, Tels wrote: >> Here are two test c files, both "compiled" with gcc -s -O3 and I show >> only >> the assembly output for the main functions here: > > Maybe my message was bad formulated. I didn't say to keep the > if (..) ..; code - silly compilers doesn't seem to grok it. > Maybe the thing everybody wants is: > > in .h >#define ABS(a) ((a) < 0 ? -(a) : (a)) > /* beware: it evaluates 'a' twice */ > > in .c > left % ABS(right) > > But, please please don't use the wicked abs() function. > It's not an operator. > > It will always punch its argument into an int, should it > be long long, long, unsigned, etc. GCC will sometimes > inline it and sometimes not. Ah, than for the warning. I must admit my C and compiler and assembler knowledge is getting quite rusty... > You'll be better off if you _never_ use it :-) I'll remember this :) >> Oh, one more thought: In the code in question, what are "right" and >> "left"? ints? longs? or IVs? > > They are IVs. This means they could be 64-bit on a 32-bit platform. > (If you configured with -Duse64bitint). Ah, okay. Thanx again. Best wishes, Tels - -- Signed on Mon Mar 3 05:31:36 2003 with http://bloodgate.com/tels.asc perl -MDev::Bollocks -le'print Dev::Bollocks->rand()' authoritatively iterate B2B technologies http://www.notcpa.org/ You have the freedom to run any code. Yet. http://bloodgate.com/perl My current Perl projects -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.0.6 (GNU/Linux) Comment: When cryptography is outlawed, bayl bhgynjf jvyy unir cevinpl. iQEVAwUBPmLaqHcLPEOTuEwVAQEL1gf8DZRLu+I+YOukh95mPpPnp1OFlgTWF9eF VNZJ+WdhwROaJgmRZrDTzNawtc0qX+/si1py5gV+gps3f7ekTPBpF4GRNAQMHqcO puj61qLGlv37zuw7mkW1etKW9BmFy77P1YZ5/jDNDkFp44eRmDSzPy+37nD7PW8p yaRYs6ykMssj+F3YiEt/zpxpgcQ2WWvQ0xUeS0oDyjBUy6d8RXA+w17O/7LRDwNh lXraiMoTqLnS/U24ab5VQbwF+zmrEnO0pZvtjHmDqaTrkhaM/E5UYoXEElBxHTor z6Ho1nm/UIfSBJcUu7OEV5QCZdcQdOTCCPcwaE1yge+sBYsVnucPhQ== =wr9q -----END PGP SIGNATURE-----Thread Previous | Thread Next