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# How to update RISCV tables.
* Checkout LLVM. Patches are tested on commit `b81d715c`.
```
git clone https://github.com/llvm/llvm-project.git
git checkout b81d715c
```
* Apply patches from the current directory.
* Run tablegen.
```
cd $LLVM
mkdir build
cd build
cmake -DCMAKE_CXX_FLAGS=-DCAPSTONE -DLLVM_EXPERIMENTAL_TARGETS_TO_BUILD="RISCV" ..
make RISCVCommonTableGen
```
* Copy `.inc` files.
```
cp arch/RISCV/RISCVGenInsnNameMaps.inc \
arch/RISCV/RISCVGenInsnNameMaps.inc.old
for inc in $(cd arch/RISCV && ls *.inc); do
cp $LLVM/build/lib/Target/RISCV/$inc arch/RISCV/
done
```
* Fixup `RISCVGenInsnNameMaps.inc`.
```
comm -1 -3 \
<(grep RISCV_INS_ <arch/RISCV/RISCVGenInsnNameMaps.inc.old \
| sort -u) \
<(grep RISCV_INS_ <arch/RISCV/RISCVGenInsnNameMaps.inc \
| sort -u) \
>arch/RISCV/RISCVGenInsnNameMaps.inc.new
cat arch/RISCV/RISCVGenInsnNameMaps.inc.old \
arch/RISCV/RISCVGenInsnNameMaps.inc.new \
>arch/RISCV/RISCVGenInsnNameMaps.inc
```
* Add new groups, insns, registers and formats.
* `include/capstone/RISCV.h`
* `enum RISCV_insn`:
```
comm -1 -3 \
<(perl -ne 'if (/(RISCV_INS_.+),/) { print "\t$1,\n" }' \
<include/capstone/RISCV.h | sort -u) \
<(perl -ne 'if (/(RISCV_INS_.+),/) { print "\t$1,\n" }' \
<arch/RISCV/RISCVMappingInsn.inc | sort -u)
```
* `enum RISCV_insn_group`:
```
perl -ne 'if (/(\{.RISCV_GRP_.*?\}),/) { print "\t$1,\n"; }' < \
arch/RISCV/RISCVMappingInsn.inc | sort -u
```
* `arch/RISCV/RISCVDisassembler.c`
* `arch/RISCV/RISCVInstPrinter.c`
* `arch/RISCV/RISCVMCTargetDesc.c`
* `arch/RISCV/RISCVMCTargetDesc.h`
* `arch/RISCV/RISCVMapping.c`
* `enum group_name_maps`:
```
perl -ne 'if (/(RISCV_GRP_(.*?)),/) { print "\t{ $1, \"" . lc($2) . "\" },\n"; }' \
arch/RISCV/RISCVMappingInsn.inc | sort -u
```
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