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Currently in softfloat we canonicalize input denormals and so the code that implements floating point operations does not need to care whether the input value was originally normal or denormal. However, both x86 and Arm FEAT_AFP require that an exception flag is set if: * an input is denormal * that input is not squashed to zero * that input is actually used in the calculation (e.g. we did not find the other input was a NaN) So we need to track that the input was a non-squashed denormal. To do this we add a new value to the FloatClass enum. In this commit we add the value and adjust the code everywhere that looks at FloatClass values so that the new float_class_denormal behaves identically to float_class_normal. We will add the code that does the "raise a new float exception flag if an input was an unsquashed denormal and we used it" in a subsequent commit. There should be no behavioural change in this commit. Signed-off-by: Peter Maydell <peter.maydell@linaro.org> Reviewed-by: Richard Henderson <richard.henderson@linaro.org> |
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| .. | ||
| meson.build | ||
| softfloat-parts-addsub.c.inc | ||
| softfloat-parts.c.inc | ||
| softfloat-specialize.c.inc | ||
| softfloat.c | ||