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RISC-V 'f' extension does not support any way to enable/disable flushing subnormalz to zero, implementations are required to handle subnormals. Therefore this commit re-uses FTZ handling code from PPC, where FTZ also has to be explicitly performed.
bashbaug
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Mar 17, 2026
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LGTM. Changes appear to be additive or obvious fixes (e.g. renames), so support for existing platforms should not be affected.
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Merging as discussed in the March 17th teleconference. |
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Unlike related PR #2344 that simply warns about unsupported FTZ, this PR attempts to correctly handle FTZ on RISC-V.
RISC-V 'f' extension does not support any way to enable/disable flushing subnormals to zero, implementations are required to always support subnormals. Therefore this PR re-uses FTZ handling code from PPC, where flushing also has to be explicitly performed.