revert 22847ec78a

revert [jit] Disable fastmem (by default) on FreeBSD, Solaris and OpenBSD due to subpar timings of SIGSEGV (#319)
According to MaranBR, this should have never been merged and should have been closed instead as they iterated on it in 324.

Reviewed-on: https://git.eden-emu.dev/eden-emu/eden/pulls/319
Reviewed-by: Shinmegumi <shinmegumi@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.cpp

@@ -269,13 +269,8 @@ std::shared_ptr<Dynarmic::A32::Jit> ArmDynarmic32::MakeJit(Common::PageTable* pa
             config.check_halt_on_memory_access = true;
         }
     } else {
-#if defined(__FreeBSD__) || defined(__OpenBSD__) || defined(__sun__)
-        config.fastmem_pointer = std::nullopt;
-        config.fastmem_exclusive_access = false;
-#endif
-        switch (Settings::values.cpu_accuracy.GetValue()) {
         // Unsafe optimizations
-        case Settings::CpuAccuracy::Unsafe:
+        if (Settings::values.cpu_accuracy.GetValue() == Settings::CpuAccuracy::Unsafe) {
             config.unsafe_optimizations = true;
             if (Settings::values.cpuopt_unsafe_unfuse_fma) {
                 config.optimizations |= Dynarmic::OptimizationFlag::Unsafe_UnfuseFMA;
@@ -292,22 +287,21 @@ std::shared_ptr<Dynarmic::A32::Jit> ArmDynarmic32::MakeJit(Common::PageTable* pa
             if (Settings::values.cpuopt_unsafe_ignore_global_monitor) {
                 config.optimizations |= Dynarmic::OptimizationFlag::Unsafe_IgnoreGlobalMonitor;
             }
-            break;
+        }
+
         // Curated optimizations
-        case Settings::CpuAccuracy::Auto:
+        if (Settings::values.cpu_accuracy.GetValue() == Settings::CpuAccuracy::Auto) {
             config.unsafe_optimizations = true;
             config.optimizations |= Dynarmic::OptimizationFlag::Unsafe_UnfuseFMA;
             config.optimizations |= Dynarmic::OptimizationFlag::Unsafe_IgnoreStandardFPCRValue;
             config.optimizations |= Dynarmic::OptimizationFlag::Unsafe_InaccurateNaN;
             config.optimizations |= Dynarmic::OptimizationFlag::Unsafe_IgnoreGlobalMonitor;
-            break;
+        }
+
         // Paranoia mode for debugging optimizations
-        case Settings::CpuAccuracy::Paranoid:
+        if (Settings::values.cpu_accuracy.GetValue() == Settings::CpuAccuracy::Paranoid) {
             config.unsafe_optimizations = false;
             config.optimizations = Dynarmic::no_optimizations;
-            break;
-        default:
-            break;
         }
     }
 

src/core/arm/dynarmic/arm_dynarmic_64.cpp

@@ -327,13 +327,8 @@ std::shared_ptr<Dynarmic::A64::Jit> ArmDynarmic64::MakeJit(Common::PageTable* pa
             config.check_halt_on_memory_access = true;
         }
     } else {
-#if defined(__FreeBSD__) || defined(__OpenBSD__) || defined(__sun__)
-        config.fastmem_pointer = std::nullopt;
-        config.fastmem_exclusive_access = false;
-#endif
         // Unsafe optimizations
-        switch(Settings::values.cpu_accuracy.GetValue()) {
-        case Settings::CpuAccuracy::Unsafe:
+        if (Settings::values.cpu_accuracy.GetValue() == Settings::CpuAccuracy::Unsafe) {
             config.unsafe_optimizations = true;
             if (Settings::values.cpuopt_unsafe_unfuse_fma) {
                 config.optimizations |= Dynarmic::OptimizationFlag::Unsafe_UnfuseFMA;
@@ -350,21 +345,20 @@ std::shared_ptr<Dynarmic::A64::Jit> ArmDynarmic64::MakeJit(Common::PageTable* pa
             if (Settings::values.cpuopt_unsafe_ignore_global_monitor) {
                 config.optimizations |= Dynarmic::OptimizationFlag::Unsafe_IgnoreGlobalMonitor;
             }
-            break;
+        }
+
         // Curated optimizations
-        case Settings::CpuAccuracy::Auto:
+        if (Settings::values.cpu_accuracy.GetValue() == Settings::CpuAccuracy::Auto) {
             config.unsafe_optimizations = true;
             config.optimizations |= Dynarmic::OptimizationFlag::Unsafe_UnfuseFMA;
             config.fastmem_address_space_bits = 64;
             config.optimizations |= Dynarmic::OptimizationFlag::Unsafe_IgnoreGlobalMonitor;
-            break;
+        }
+
         // Paranoia mode for debugging optimizations
-        case Settings::CpuAccuracy::Paranoid:
+        if (Settings::values.cpu_accuracy.GetValue() == Settings::CpuAccuracy::Paranoid) {
             config.unsafe_optimizations = false;
             config.optimizations = Dynarmic::no_optimizations;
-            break;
-        default:
-            break;
         }
     }