From 53b2a59a9b48b37f54c909bf4537a0ad259e72ed Mon Sep 17 00:00:00 2001
From: Cyuria <55673467+cyuria@users.noreply.github.com>
Date: Thu, 13 Jun 2024 12:36:16 +1000
Subject: [PATCH] feat(zicsr): add zicsr instructions + parser stubs

---
 h/form/csr.h   |  4 ++++
 h/parse.h      |  2 ++
 src/form/csr.c | 16 ++++++++++++++++
 src/parse.c    | 10 ++++++++++
 4 files changed, 32 insertions(+)
 create mode 100644 h/form/csr.h
 create mode 100644 src/form/csr.c

diff --git a/h/form/csr.h b/h/form/csr.h
new file mode 100644
index 0000000..b880902
--- /dev/null
+++ b/h/form/csr.h
@@ -0,0 +1,4 @@
+#pragma once
+#include "form/instructions.h"
+
+extern const struct formation zicsr[];
diff --git a/h/parse.h b/h/parse.h
index bb1f1c1..748f716 100644
--- a/h/parse.h
+++ b/h/parse.h
@@ -26,5 +26,7 @@ arg_parser parse_jr;
 arg_parser parse_ftso;
 arg_parser parse_al;
 arg_parser parse_as;
+arg_parser parse_csr;
+arg_parser parse_csri;
 
 int parse_asm(const char *, struct sectionpos);
diff --git a/src/form/csr.c b/src/form/csr.c
new file mode 100644
index 0000000..9012c4b
--- /dev/null
+++ b/src/form/csr.c
@@ -0,0 +1,16 @@
+
+#include "form/csr.h"
+
+#include "form/generic.h"
+#include "parse.h"
+
+const struct formation zicsr[] = {
+	{ "csrrw", &form_itype, &parse_csr, { 4, OP_CSR, 0x1, 0 } },
+	{ "csrrs", &form_itype, &parse_csr, { 4, OP_CSR, 0x2, 0 } },
+	{ "csrrc", &form_itype, &parse_csr, { 4, OP_CSR, 0x3, 0 } },
+	{ "csrrwi", &form_itype, &parse_csri, { 4, OP_CSR, 0x5, 0 } },
+	{ "csrrsi", &form_itype, &parse_csri, { 4, OP_CSR, 0x6, 0 } },
+	{ "csrrci", &form_itype, &parse_csri, { 4, OP_CSR, 0x7, 0 } },
+
+	END_FORMATION
+};
diff --git a/src/parse.c b/src/parse.c
index 88f431f..d106323 100644
--- a/src/parse.c
+++ b/src/parse.c
@@ -727,3 +727,13 @@ struct args parse_as(char *argstr)
 
 	return args;
 }
+
+struct args parse_csr(char *argstr)
+{
+
+}
+
+struct args parse_csri(char *argstr)
+{
+
+}