[dynarmic] support -fno-exception compilations to reduce unwind table overheads

Signed-off-by: lizzie <lizzie@eden-emu.dev>

src/common/x64/xbyak_abi.h

@@ -5,6 +5,7 @@
 
 #include <bitset>
 #include <initializer_list>
+#define XBYAK_NO_EXCEPTION 1
 #include <xbyak/xbyak.h>
 #include "common/assert.h"
 

src/common/x64/xbyak_util.h

@@ -4,6 +4,7 @@
 #pragma once
 
 #include <type_traits>
+#define XBYAK_NO_EXCEPTION 1
 #include <xbyak/xbyak.h>
 #include "common/x64/xbyak_abi.h"
 

src/dynarmic/CMakeLists.txt

@@ -95,7 +95,7 @@ else()
         -pedantic
         -Wno-missing-braces
         -fno-rtti
-        #-fno-exceptions
+        -fno-exceptions
     )
     if (CXX_GCC)
         # GCC produces bogus -Warray-bounds warnings from xbyak headers for code paths that are not

src/dynarmic/src/dynarmic/backend/x64/block_of_code.cpp

@@ -66,10 +66,7 @@ public:
 #ifdef _WIN32
     uint8_t* alloc(size_t size) override {
         void* p = VirtualAlloc(nullptr, size, MEM_RESERVE, PAGE_READWRITE);
-        if (p == nullptr) {
-            using Xbyak::Error;
-            XBYAK_THROW(Xbyak::ERR_CANT_ALLOC);
-        }
+        ASSERT(p != nullptr);
         return static_cast<uint8_t*>(p);
     }
 
@@ -105,10 +102,7 @@ public:
         prot |= PROT_MPROTECT(PROT_READ) | PROT_MPROTECT(PROT_WRITE) | PROT_MPROTECT(PROT_EXEC);
 #endif
         void* p = mmap(nullptr, size, prot, mode, -1, 0);
-        if (p == MAP_FAILED) {
-            using Xbyak::Error;
-            XBYAK_THROW(Xbyak::ERR_CANT_ALLOC);
-        }
+        ASSERT(p != MAP_FAILED);
         std::memcpy(p, &size, sizeof(size_t));
         return static_cast<uint8_t*>(p) + DYNARMIC_PAGE_SIZE;
     }
@@ -532,13 +526,8 @@ size_t BlockOfCode::GetTotalCodeSize() const {
 }
 
 void* BlockOfCode::AllocateFromCodeSpace(size_t alloc_size) {
-    if (size_ + alloc_size >= maxSize_) {
-        using Xbyak::Error;
-        XBYAK_THROW(Xbyak::ERR_CODE_IS_TOO_BIG);
-    }
-
+    ASSERT(!(size_ + alloc_size >= maxSize_));
     EnsureMemoryCommitted(alloc_size);
-
     void* ret = getCurr<void*>();
     size_ += alloc_size;
     memset(ret, 0, alloc_size);

src/dynarmic/src/dynarmic/backend/x64/hostloc.h

@@ -8,6 +8,7 @@
 #pragma once
 
 #include <bitset>
+#define XBYAK_NO_EXCEPTION 1
 #include <xbyak/xbyak.h>
 
 #include "dynarmic/common/assert.h"

src/dynarmic/src/dynarmic/backend/x64/xbyak.h

@@ -11,5 +11,6 @@
 // #define XBYAK_STD_UNORDERED_MAP ankerl::unordered_dense::map
 // #define XBYAK_STD_UNORDERED_MULTIMAP boost::unordered_multimap
 
+#define XBYAK_NO_EXCEPTION 1
 #include <xbyak/xbyak.h>
 #include <xbyak/xbyak_util.h>

src/video_core/macro.cpp

@@ -21,6 +21,7 @@
 #pragma clang diagnostic ignored "-Wconversion"
 #pragma clang diagnostic ignored "-Wshadow"
 #endif
+#define XBYAK_NO_EXCEPTION 1
 #include <xbyak/xbyak.h>
 #endif