[dynarmic] Fix ISB with new JIT schema (#3576)

If an ISB is issued, the changes on the memory wouldn't be reflected
Now we emulate "instruction cache" properly by just telling the mechanism to re-fetch the entire page again (to make ANY changes visible immediately)

This mainly fixes a potential issue where an ISB is emitted before a branch on the same codepage.

Signed-off-by: lizzie <lizzie@eden-emu.dev>
Reviewed-on: https://git.eden-emu.dev/eden-emu/eden/pulls/3576
Reviewed-by: CamilleLaVey <camillelavey99@gmail.com>
Reviewed-by: crueter <crueter@eden-emu.dev>
Reviewed-by: DraVee <dravee@eden-emu.dev>
Co-authored-by: lizzie <lizzie@eden-emu.dev>
Co-committed-by: lizzie <lizzie@eden-emu.dev>

src/core/arm/dynarmic/arm_dynarmic_32.h

@@ -35,6 +35,9 @@ public:
     u32 MemoryRead32(u32 vaddr) override;
     u64 MemoryRead64(u32 vaddr) override;
     std::optional<u32> MemoryReadCode(u32 vaddr) override;
+    void InstructionSynchronizationBarrierRaised() override {
+        last_code_addr = 0; //reset back, force refetch
+    }
     void MemoryWrite8(u32 vaddr, u8 value) override;
     void MemoryWrite16(u32 vaddr, u16 value) override;
     void MemoryWrite32(u32 vaddr, u32 value) override;

src/core/arm/dynarmic/arm_dynarmic_64.h

@@ -42,6 +42,9 @@ public:
     u64 MemoryRead64(u64 vaddr) override;
     Dynarmic::A64::Vector MemoryRead128(u64 vaddr) override;
     std::optional<u32> MemoryReadCode(u64 vaddr) override;
+    void InstructionSynchronizationBarrierRaised() override {
+        last_code_addr = 0; //reset back, force refetch
+    }
     void MemoryWrite8(u64 vaddr, u8 value) override;
     void MemoryWrite16(u64 vaddr, u16 value) override;
     void MemoryWrite32(u64 vaddr, u32 value) override;

src/core/hle/service/jit/jit_context.cpp

@@ -56,6 +56,9 @@ public:
         }
         return cached_code_page.inst[(vaddr & Core::Memory::YUZU_PAGEMASK) / sizeof(u32)];
     }
+    void InstructionSynchronizationBarrierRaised() override {
+        last_code_addr = 0; //reset back, force refetch
+    }
     u8 MemoryRead8(u64 vaddr) override {
         return ReadMemory<u8>(vaddr);
     }