sys/info: more CPU feature detection for RISC-V

core/sys/info/cpu_riscv64.odin

@@ -1,13 +1,97 @@
 package sysinfo
 
 CPU_Feature :: enum u64 {
-	I = 'I' - 'A', // Base features, don't think this is ever not here.
-	M = 'M' - 'A', // Integer multiplication and division, currently required by Odin.
-	A = 'A' - 'A', // Atomics.
-	F = 'F' - 'A', // Single precision floating point, currently required by Odin.
-	D = 'D' - 'A', // Double precision floating point, currently required by Odin.
-	C = 'C' - 'A', // Compressed instructions.
-	V = 'V' - 'A', // Vector operations.
+	// Bit-Manipulation ISA Extensions v1.
+	Zba = 3,
+	Zbb,
+	Zbs,
+
+	// CMOs (ratified).
+	Zicboz,
+
+	// Bit-Manipulation ISA Extensions v1.
+	Zbc,
+
+	// Scalar Crypto ISA extensions v1.
+	Zbkb,
+	Zbkc,
+	Zbkx,
+	Zknd,
+	Zkne,
+	Zknh,
+	Zksed,
+	Zksh,
+	Zkt,
+
+	// Cryptography Extensions Volume II v1.
+	Zvbb,
+	Zvbc,
+	Zvkb,
+	Zvkg,
+	Zvkned,
+	Zvknha,
+	Zvknhb,
+	Zvksed,
+	Zvksh,
+	Zvkt,
+
+	// ISA Manual v1.
+	Zfh,
+	Zfhmin,
+	Zihintntl,
+
+	// ISA manual (ratified).
+	Zvfh,
+	Zvfhmin,
+	Zfa,
+	Ztso,
+
+	// Atomic Compare-and-Swap Instructions Manual (ratified).
+	Zacas,
+	Zicond,
+
+	// ISA manual (ratified).
+	Zihintpause,
+
+	// Vector Extensions Manual v1.
+	Zve32x,
+	Zve32f,
+	Zve64x,
+	Zve64f,
+	Zve64d,
+
+	// ISA manual (ratified).
+	Zimop,
+
+	// Code Size Reduction (ratified).
+	Zca,
+	Zcb,
+	Zcd,
+	Zcf,
+
+	// ISA manual (ratified).
+	Zcmop,
+	Zawrs,
+
+ 	// Base features, don't think this is ever not here.
+	I,
+ 	// Integer multiplication and division, currently required by Odin.
+	M,
+ 	// Atomics.
+	A,
+ 	// Single precision floating point, currently required by Odin.
+	F,
+ 	// Double precision floating point, currently required by Odin.
+	D,
+ 	// Compressed instructions.
+	C,
+ 	// Vector operations.
+	V,
+
+	// Indicates Misaligned Scalar Loads will not trap the program.
+	Misaligned_Supported,
+	// Indicates Hardware Support for Misaligned Scalar Loads.
+	Misaligned_Fast,
 }
 
 CPU_Features :: distinct bit_set[CPU_Feature; u64]