From acea3a2b6b229f52a56533c0558caa7c22c4b5ab Mon Sep 17 00:00:00 2001
From: Basilisk-Dev <basiliskdev@protonmail.com>
Date: Thu, 23 Apr 2026 19:16:28 -0400
Subject: [PATCH] Issue #3049 - Wire loongarch64 non-Ion frame and patch hooks

---
 js/src/jit/JitFrames.cpp                         |  7 +++++++
 js/src/jit/loongarch64/Assembler-loongarch64.cpp |  8 ++++++++
 js/src/jit/loongarch64/Assembler-loongarch64.h   | 12 ++++++++++++
 3 files changed, 27 insertions(+)

diff --git a/js/src/jit/JitFrames.cpp b/js/src/jit/JitFrames.cpp
index 65b0e8abfb..a6fee5dec6 100644
--- a/js/src/jit/JitFrames.cpp
+++ b/js/src/jit/JitFrames.cpp
@@ -2539,6 +2539,13 @@ MachineState::FromBailout(RegisterDump::GPRArray& regs, RegisterDump::FPUArray&
         machine.setRegisterLocation(FloatRegister(i, FloatRegisters::Double), &fpregs[i]);
         machine.setRegisterLocation(FloatRegister(i, FloatRegisters::Single), &fpregs[i]);
     }
+#elif defined(JS_CODEGEN_LOONGARCH64)
+    for (unsigned i = 0; i < FloatRegisters::TotalPhys; i++) {
+        machine.setRegisterLocation(FloatRegister(FloatRegister::Encoding(i), FloatRegisters::Double),
+                                    &fpregs[i]);
+        machine.setRegisterLocation(FloatRegister(FloatRegister::Encoding(i), FloatRegisters::Single),
+                                    &fpregs[i]);
+    }
 #elif defined(JS_CODEGEN_X86) || defined(JS_CODEGEN_X64)
     for (unsigned i = 0; i < FloatRegisters::TotalPhys; i++) {
         machine.setRegisterLocation(FloatRegister(i, FloatRegisters::Single), &fpregs[i]);
diff --git a/js/src/jit/loongarch64/Assembler-loongarch64.cpp b/js/src/jit/loongarch64/Assembler-loongarch64.cpp
index ffa748e09b..760e2f17dd 100644
--- a/js/src/jit/loongarch64/Assembler-loongarch64.cpp
+++ b/js/src/jit/loongarch64/Assembler-loongarch64.cpp
@@ -19,6 +19,14 @@ using mozilla::DebugOnly;
 using namespace js;
 using namespace js::jit;
 
+void js::jit::PatchJump(CodeLocationJump& jump_, CodeLocationLabel label,
+                        ReprotectCode reprotect) {
+  (void)jump_;
+  (void)label;
+  (void)reprotect;
+  MOZ_CRASH("Ion patching is not supported on loongarch64");
+}
+
 // Note this is used for inter-wasm calls and may pass arguments and results
 // in floating point registers even if the system ABI does not.
 
diff --git a/js/src/jit/loongarch64/Assembler-loongarch64.h b/js/src/jit/loongarch64/Assembler-loongarch64.h
index ffb14e742f..c6c23dd377 100644
--- a/js/src/jit/loongarch64/Assembler-loongarch64.h
+++ b/js/src/jit/loongarch64/Assembler-loongarch64.h
@@ -12,6 +12,7 @@
 
 #include "jit/CompactBuffer.h"
 #include "jit/IonCode.h"
+#include "jit/JitCompartment.h"
 #include "jit/JitSpewer.h"
 #include "jit/loongarch64/Architecture-loongarch64.h"
 #include "jit/shared/Assembler-shared.h"
@@ -1448,6 +1449,7 @@ class AssemblerLOONGARCH64 : public AssemblerShared {
     return false;
 #endif
   }
+  static bool SupportsSimd() { return false; }
   static bool SupportsUnalignedAccesses() { return true; }
   static bool SupportsFastUnalignedFPAccesses() { return true; }
 
@@ -1882,6 +1884,16 @@ static inline bool GetTempRegForIntArg(uint32_t usedIntArgs,
   return true;
 }
 
+void PatchJump(CodeLocationJump& jump_, CodeLocationLabel label,
+               ReprotectCode reprotect = DontReprotect);
+
+static inline void PatchBackedge(CodeLocationJump& jump_,
+                                 CodeLocationLabel label,
+                                 JitRuntime::BackedgeTarget target) {
+  (void)target;
+  PatchJump(jump_, label);
+}
+
 }  // namespace jit
 }  // namespace js