On 03/09/11 12:26, Thomas Schatzl wrote: > Hi, > > On Wed, 09 Mar 2011 11:58:08 -0500, Andrew Haines wrote: >> if Tmp <> Im then >> begin >> //Tmp := ln(Tmp)*LogBase+Shift; // same as the following asm >> proc? >> asm >> FLD LogBase; >> FLD Tmp; >> FYL2X; > > FYL2X calculates the log to the base 2 of tmp, not log to the base e of > tmp? Just a guess. > > Thomas >
I originally used log2(Tmp) but switched to ln to check if it was correct. Thanks for noticing that, I changed it back to log2. The current output with the pascal code looks like it did when FLDS was used instead of FLDL to load (%rdi). The intel code was "FLD QWORD[EDI]" I changed this to "FLDQ (%edi)". on x32 it became FLDL and on x64 it became FLDS. changing the line to "FLDL (%rdi)" on x86_64 fixed the last problem I had with the asm translation. It's all very confusing. Is fldl loading a 32bit floating number? The variable at (%rdi) is a double. flds makes me think it's loading a single. Andrew _______________________________________________ fpc-pascal maillist - fpc-pascal@lists.freepascal.org http://lists.freepascal.org/mailman/listinfo/fpc-pascal
