Hi, I have a gcc cross compiler on an 18 bit soft-core processor target that has the following datatypes defined: Integer 18 bit, Long 36 bit and float 36-bit(single precision). Right now my focus is on floating point operation. Since the width is non-standard(36 bit), I have the following scheme: 27 bits for Mantissa(significand), 8 bits for Exponents and 1 Sign bit. I can see the widths are defined in the float.h file. of interest to me are the following: FLT_MANT_DIG and FLT_DIG. They are defined as: FLT_MANT_DIG 24 FLT_DIG 6 I have changed them to FLT_MANT_DIG 28 FLT_DIG 9 As per my requirements in float.h and then build the gcc compiler. But still I get 32 bit floating point output.Do anyone has any experience implementing non-standard single precision floating point numbers and/or know wat changes are needed please let me know. Sincerely Sheheryar
