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Fix NOTE about ARM FMA mnemonics #1700

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Oct 28, 2024
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Fix NOTE about ARM FMA mnemonics #1700

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5 changes: 3 additions & 2 deletions src/f-st-ext.adoc
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Expand Up @@ -311,8 +311,9 @@ product as the RISC-V instructions do, so the naming scheme was more
rational at the time. The two definitions differ with respect to
signed-zero results. The RISC-V definition matches the behavior of the
x86 and ARM fused multiply-add instructions, but unfortunately the
RISC-V FNMSUB and FNMADD instruction names are swapped compared to x86
and ARM.
RISC-V FNMSUB and FNMADD instruction names are swapped as compared to x86,
whereas the RISC-V FMSUB and FNMSUB instruction names are swapped as
compared to ARM.
====

include::images/wavedrom/spfloat2.edn[]
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