RealView Compilation Tools Compiler Reference Guide - ARM ...

Compiler Command-line Options
Where model is one of:
ieee_full
ieee_fixed
All facilities, operations, and representations guaranteed by the IEEE
standard are available in single and double-precision. Modes of
operation can be selected dynamically at runtime.
This defines the symbols:
__FP_IEEE
__FP_FENV_EXCEPTIONS
__FP_FENV_ROUNDING
__FP_INEXACT_EXCEPTION
IEEE standard with round-to-nearest and no inexact exceptions.
This defines the symbols:
__FP_IEEE
__FP_FENV_EXCEPTIONS
ieee_no_fenv
IEEE standard with round-to-nearest and no exceptions. This mode is
stateless and is compatible with the Java floating-point arithmetic model.
This defines the symbol __FP_IEEE.
std
fast
IEEE finite values with denormals flushed to zero, round-to-nearest, and
no exceptions. This is compatible with standard C and C++ and is the
default option.
Normal finite values are as predicted by the IEEE standard. However:
• NaNs and infinities might not be produced in all circumstances
defined by the IEEE model. When they are produced, they might
not have the same sign.
• The sign of zero might not be that predicted by the IEEE model.
Perform more aggressive floating-point optimizations that might cause a
small loss of accuracy to provide a significant performance increase. This
option defines the symbol __FP_FAST.
This option results in behavior that is not fully compliant with the ISO C
or C++ standard. However, numerically robust floating-point programs
are expected to behave correctly.
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