Merge pull request #50 from cmuellner/rv32-xtheadfmemidx

xtheadfmemidx: Fix instruction depenencies
XUANTIE-RV · Dec 14, 2024 · 354b417 · 354b417
2 parents 9741aab + f9fe30c
commit 354b417
Showing 1 changed file with 12 additions and 13 deletions.
diff --git a/xtheadfmemidx.adoc b/xtheadfmemidx.adoc
@@ -13,21 +13,20 @@ The table below gives an overview of the instructions:
 
 [cols="^3,^3,12,18",stripes=even,options="header"]
 |===
-| F    | D    | Mnemonic              | Instruction
-| Y    | Y    | th.flrd  _rd_, _rs1_, _rs2_, _imm2_ | <<#xtheadfmemidx-insns-flrd>>
-| Y    | Y    | th.flrw  _rd_, _rs1_, _rs2_, _imm2_ | <<#xtheadfmemidx-insns-flrw>>
-| N    | Y    | th.flurd _rd_, _rs1_, _rs2_, _imm2_ | <<#xtheadfmemidx-insns-flurd>>
-| N    | Y    | th.flurw _rd_, _rs1_, _rs2_, _imm2_ | <<#xtheadfmemidx-insns-flurw>>
-| Y    | Y    | th.fsrd  _rd_, _rs1_, _rs2_, _imm2_ | <<#xtheadfmemidx-insns-fsrd>>
-| Y    | Y    | th.fsrw  _rd_, _rs1_, _rs2_, _imm2_ | <<#xtheadfmemidx-insns-flrw>>
-| N    | Y    | th.fsurd _rd_, _rs1_, _rs2_, _imm2_ | <<#xtheadfmemidx-insns-fsurd>>
-| N    | Y    | th.fsurw _rd_, _rs1_, _rs2_, _imm2_ | <<#xtheadfmemidx-insns-flurw>>
+| RV32 | RV64 | F    | D    | Mnemonic              | Instruction
+| Y    | Y    | N    | Y    | th.flrd  _rd_, _rs1_, _rs2_, _imm2_ | <<#xtheadfmemidx-insns-flrd>>
+| Y    | Y    | Y    | Y    | th.flrw  _rd_, _rs1_, _rs2_, _imm2_ | <<#xtheadfmemidx-insns-flrw>>
+| N    | Y    | N    | Y    | th.flurd _rd_, _rs1_, _rs2_, _imm2_ | <<#xtheadfmemidx-insns-flurd>>
+| N    | Y    | Y    | Y    | th.flurw _rd_, _rs1_, _rs2_, _imm2_ | <<#xtheadfmemidx-insns-flurw>>
+| Y    | Y    | N    | Y    | th.fsrd  _rd_, _rs1_, _rs2_, _imm2_ | <<#xtheadfmemidx-insns-fsrd>>
+| Y    | Y    | Y    | Y    | th.fsrw  _rd_, _rs1_, _rs2_, _imm2_ | <<#xtheadfmemidx-insns-flrw>>
+| N    | Y    | N    | Y    | th.fsurd _rd_, _rs1_, _rs2_, _imm2_ | <<#xtheadfmemidx-insns-fsurd>>
+| N    | Y    | Y    | Y    | th.fsurw _rd_, _rs1_, _rs2_, _imm2_ | <<#xtheadfmemidx-insns-flurw>>
 |===
 
-All instructions are available for `RV32` and `RV64`.
-Additionally at least the `F` extension needs to be available.
-In order to have all instructions available, the `D` extensions
-needs to be implemented.
+The first four columns show the requirements of the instructions.
+E.g. `th.flurd` is only available on harts that implement the `rv64i` base
+and the `D` double-precision floating-point extensions.
 
 === Availability