Add utility script for generating long multilib configure lines when building riscv-gnu-toolchain

test/sim/common/multilib-gen-gen.py

@@ -0,0 +1,31 @@
+#!/usr/bin/env python3
+
+# Generate a multilib configure line for riscv-gnu-toolchain with all
+# combinations of extensions supported by both Hazard3 and mainline GCC
+# (currently GCC 13.2). Use as:
+# ./configure ... --with-multilib-generator="$(path/to/multilib-gen-gen.py)"
+
+base = "rv32i"
+abi = "-ilp32--"
+options = [
+	"m",
+	"a",
+	"c",
+	"_zicsr",
+	"_zifencei",
+	"_zba",
+	"_zbb",
+	"_zbc",
+	"_zbs",
+	"_zbkb"
+]
+
+l = []
+for i in range(2 ** len(options)):
+	isa = base
+	for j in range(len(options)):
+		if i & (1 << j):
+			isa += options[j]
+	l.append(isa + abi)
+
+print(";".join(l))