[PATCH] D140460: [RISCV][MC] Add support for experimental zfa extension

Tue Jan 17 08:58:37 PST 2023

craig.topper added a comment.

In D140460#4055333 <https://reviews.llvm.org/D140460#4055333>, @joshua-arch1 wrote:

> In D140460#4050322 <https://reviews.llvm.org/D140460#4050322>, @craig.topper wrote:
>
>> I think according to the spec, we need to support parsing "Minimum positive normal" in decimal form. The exact value for is different for fli.h, fli.s, and fli.d.
>
> I think there will be some difficulties in expressing 'minimum positive normal' in decimal form. For single-presicion minimum positive normal, the value is 1.1754943508222875079687365372222456778186655567720875215087517062784172594547271728515625E-38.  For double-precison, the value will need to be expressed in a much larger precision even if we use toString().

The disassembler should print "min", but the parser should accept the full value.

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  https://reviews.llvm.org/D140460/new/

https://reviews.llvm.org/D140460