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Are the platforms covered by the C standard still in use? [duplicate]

Tags:

c

standards

Possible Duplicate:
Rephrased: list of platforms supported by the C standard

The C standard is very loosely defined: - it covers two's complement, ones' complement, signed magnitude - integers can be of various width, with padding bits - certain bit patterns may not represent valid values.

There is a obvious downside to this: it make portable code harder to write. Does anyone know of platforms for which there are still active development work, but which are

  • not 2's complement or
  • the integer width is not 32 bits or 64 bits or
  • some integer types have padding bits or
  • if you worked on a 2's complement machine, the bit pattern with sign bit 1 and all value bits zero is not a valid negative number or
  • integer conversion from signed to unsigned (and vice versa) is not via verbatim copying of bit patterns or
  • right shift of integer is not arithmetic shift or
  • the number of value bits in an unsigned type is not the number of value bits in the corresponding signed type + 1 or
  • conversion from a wider int type to a smaller type is not by truncation of the left most bits which would not fit
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tyty Avatar asked Nov 04 '11 09:11

tyty


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2 Answers

yes...it is still used in embedded system and in micro-controllers. It is also used in education purposes.

like image 139
Ashutosh Dave Avatar answered Oct 23 '22 12:10

Ashutosh Dave


yes, we see this all the time when working with customizable microcontrolers and DSPs for things like audio processing.

like image 40
tletnes Avatar answered Oct 23 '22 11:10

tletnes