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clarify when to set misa.C #230

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Oct 25, 2023
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clarify when to set misa.C #230

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9ffff8a
clarify when to set misa.C
tariqkurd-repo Oct 23, 2023
00c281c
simplify the text
tariqkurd-repo Oct 25, 2023
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13 changes: 13 additions & 0 deletions Zc-specification/Zc.adoc
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Original file line number Diff line number Diff line change
Expand Up @@ -11,6 +11,7 @@
[width="100%",options=header]
|====================================================================================
|Version | change
|v1.0.4-3 | Added misa.C clarification
|v1.0.4-2 | Added rule that C implies Zca, Zcf, Zcd - discussed in https://github.com/riscv/riscv-isa-manual/issues/1132
|v1.0.4-1 | Added rule that Zcf implies F and Zcd implies D - discussed in https://github.com/riscv/riscv-code-size-reduction/issues/221

Expand Down Expand Up @@ -120,6 +121,18 @@ Therefore common ISA strings can be updated as follows to include the relevant Z
* RV32IMC becomes RV32IM_Zce
* RV32IMCF becomes RV32IMF_Zce

[#misaC]
=== MISA.C

MISA.C is set if the following extensions are selected:

* Zca and not F
* Zca, Zcf and F is specified (RV32 only)
* Zca, Zcf and Zcd if D is specified (RV32 only)
** this configuration excludes Zcmp, Zcmt
* Zca, Zcd if D is specified (RV64 only)
** this configuration excludes Zcmp, Zcmt

[#Zca]
=== Zca

Expand Down