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| From: | Richard Henderson |
| Subject: | Re: Denormal input handling |
| Date: | Wed, 26 May 2021 12:23:01 -0700 |
| User-agent: | Mozilla/5.0 (X11; Linux x86_64; rv:78.0) Gecko/20100101 Thunderbird/78.8.1 |
On 5/26/21 12:02 PM, Michael Morrell via wrote:
I think the behavior should be for denormal inputs that if "flush_inputs_to_zero" is true, then set the value to zero (without setting the "input denormal" flag); and if "flush_inputs_to_zero" is false, set the "input denormal" flag and normalize the input. This matches what x86 does (I'm not sure about other architectures).
It is not. Intel Architectures SDM Vol 1, Section 11.5.2.2: The denormal operand exception is not affected by flush-to-zero mode. r~
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