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The new design simply lets you specify hex or not in tarval_snprintf.
This is way simpler than the previous machinery and enough for all users in
libfirm.

fc_val_from_ieee754 simply does not work correctly for denormalized
input values if the desired result is smaller than a long double.
However, converting to an fp_value using the mantissa/characteristic
information of a long double and later using fc_cast to convert to
the desired target format works.

Just state the copyright and the project the files belong to. You can
then find the COPYING file for the whole project.

The main change here is splitting new_ir_mode into new_int_mode,
new_reference_mode and new_float_mode. You can now specify
mantissa+exponent size in new_float_mode. This also changes:

- x86 80bit-FP mode is NOT a ieee754 don't put "ieee754" into functions
  names that can also handle x86 80bit fps
- Move ieee_descriptor_t from tarval module into ir_mode struct
  (and rename to float_descriptor_t)
- Introduce mode_Q which represents binary128 from ieee754
- You can ask float modes for mantissa/exponent sizes now
- Fix endianess when emitting big float values in begnuas
- A bunch of long double fixes in ia32: the mode there has 10bytes
  (80bit) but the variables typically are 12 or 16 byte big
- This fixes some problems of sparc binary128 handling

[r28226]

[r28221]

[r27924]

[r22728]

- add half and quad (need to change general precision from 66 to 130 bit) precisions

[r21395]

[r21389]

- BugFix: the buffer REALLY must been cleared in fc_val_from_ieee754()
- replaced the constant 2 by ROUNDING_BITS
- replaced division in exponent bias calculation
- replaced assert(0) by panic()
- add panic when tarval_carry() is used (not fully implemented)
- improved doxygen docu

[r19405]

[r17143]

[r15709]

[r15334]

[r15325]

- removed the *_calc functions
- simplified floating point handling
- renamed functions

[r15291]

removed ugly defined that create simple declarartions
more doxygen docu added

[r13512]

[r13510]

some comments added

[r6560]

[r6208]

[r4768]

[r4563]

[r2801]

[r2458]

[r2094]

[r1714]

Added more floating point output modes (packed hex string, hexadecimal
representation i.e. 0x1.a53fP-123)
added dependencies to makefile

[r1642]

[r1630]

[r1388]

- fixed decimal output (used '-' for negatives)
- Changed output back to hex for jack C-Backend ...
- Float implementation uses double (for compiling with cygnus) yet

[r1049]

[r1018]

[r1011]