From bf330d352f46b5310ca7a5685bb5763eb976ff98 Mon Sep 17 00:00:00 2001
From: Zhibo Hong <hongzhibo@bytedance.com>
Date: Sat, 28 Mar 2026 21:50:34 +0800
Subject: [PATCH] Add support for Za64rs and Za128rs extensions.

---
 README.md            | 1 +
 disasm/isa_parser.cc | 2 ++
 riscv/isa_parser.h   | 2 ++
 3 files changed, 5 insertions(+)

diff --git a/README.md b/README.md
index 42ee21e5..fb5edc6e 100644
--- a/README.md
+++ b/README.md
@@ -55,6 +55,7 @@ Spike supports the following RISC-V ISA features:
   - Zabha extension, v1.0
   - Zacas extension, v1.0
   - Zawrs extension, v1.0
+  - Za64rs, Za128rs extension, v1.0
   - Zicfiss extension, v1.0
   - Zicfilp extension, v1.0
   - Zca extension, v1.0
diff --git a/disasm/isa_parser.cc b/disasm/isa_parser.cc
index 03f7cb5c..9360baa7 100644
--- a/disasm/isa_parser.cc
+++ b/disasm/isa_parser.cc
@@ -115,6 +115,8 @@ static const extension_info_t extension_infos[] = {
   {"zacas", {EXT_ZACAS, EXT_ZAAMO}},
   {"zabha", {EXT_ZABHA, EXT_ZAAMO}},
   {"zawrs", {EXT_ZAWRS, EXT_ZALRSC}},
+  {"za64rs", {EXT_ZA64RS}, {"zalrsc"}},
+  {"za128rs", {EXT_ZA128RS}, {"zalrsc"}},
   {"zama16b", {EXT_ZAMA16B}},
   {"zmmul", {EXT_ZMMUL}},
   {"zba", {EXT_ZBA}},
diff --git a/riscv/isa_parser.h b/riscv/isa_parser.h
index 81a354fb..217e5ff3 100644
--- a/riscv/isa_parser.h
+++ b/riscv/isa_parser.h
@@ -115,6 +115,8 @@ typedef enum {
   EXT_SSNPM,
   EXT_SMAIA,
   EXT_SSAIA,
+  EXT_ZA64RS,
+  EXT_ZA128RS,
   NUM_ISA_EXTENSIONS
 } isa_extension_t;