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Re: Exception on a simple arithmetic problem

On Jan 20, 2006, at 10:09 AM, Cameron Hayne wrote:

On Jan 20, 2006, at 4:30 AM, Peter wrote:

This happen during debugging my C code under XCode, compiled for Intel platform,


double fVal, fTemp;

fTemp = filesize;              /* filesize is a long long and is greater than 0 */

fVal = 100.0 / (double) fTemp; /* EXC_ARITHMETIC happens here  */


The debugger stop and throws EXC_ARITHMETIC message at the calculation line. When the program is in release mode(compile with -O2), this problem never happens during runtime. I am using OS 10.4.3 (8F1111).

What condition makes EXC_ARITHMETIC exception to be thrown under Pentium ?


Have you looked at /usr/include/mach/i386/exception.h and the subcodes for EXC_ARITHMETIC?

/*
 * EXC_ARITHMETIC
 */

#define EXC_I386_DIV 1
#define EXC_I386_INTO 2
#define EXC_I386_NOEXT 3
#define EXC_I386_EXTOVR 4
#define EXC_I386_EXTERR 5
#define EXC_I386_EMERR 6
#define EXC_I386_BOUND 7
#define EXC_I386_SSEEXTERR      8

This would help you narrow it down a little.

Chris
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References: 
 >Exception on a simple arithmetic problem (From: Peter <email@hidden>)
 >Re: Exception on a simple arithmetic problem (From: Eric Albert <email@hidden>)
 >Re: Exception on a simple arithmetic problem (From: Cameron Hayne <email@hidden>)



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