From ce34e879e348cecd4e21329be5974cc4162fa6c4 Mon Sep 17 00:00:00 2001
From: neonloop
Date: Wed, 9 Feb 2022 07:15:14 +0000
Subject: Adds experimental ARM dynarec

Supports ARMv5 and higher, enable with USE_DYNAREC Makefile variable
---
 libretro.c | 39 +++++++++++++++++++++++++++++++++++++++
 1 file changed, 39 insertions(+)

(limited to 'libretro.c')

diff --git a/libretro.c b/libretro.c
index 5e4dc31..2370f4c 100644
--- a/libretro.c
+++ b/libretro.c
@@ -12,6 +12,10 @@
 #include "srtc.h"
 #include "sa1.h"
 
+#ifdef USE_DYNAREC
+#include "arm_dynarec/dynaexec.h"
+#endif
+
 #ifdef PSP
 #include <pspkernel.h>
 #include <pspgu.h>
@@ -456,6 +460,12 @@ void retro_init(void)
 #endif
    CPU.SaveStateVersion = 0;
 
+#ifdef USE_DYNAREC
+   /* Init before loading ROM to have a better chance of mmaping close to code */
+   if (DynaInit())
+      Settings.EnableDynarec = false;
+#endif
+
    if (environ_cb(RETRO_ENVIRONMENT_GET_INPUT_BITMASKS, NULL))
       libretro_supports_bitmasks = true;
 }
@@ -535,6 +545,7 @@ static void check_variables(bool first_run)
 {
    struct retro_variable var;
    bool prev_frameskip_type;
+   bool prev_dynarec;
 
    if (first_run)
    {
@@ -632,6 +643,27 @@ static void check_variables(bool first_run)
       if (strcmp(var.value, "enabled") == 0)
          reduce_sprite_flicker = true;
 
+#ifdef USE_DYNAREC
+   prev_dynarec = Settings.EnableDynarec;
+
+   var.key = "snes9x_2005_dynarec";
+   var.value = NULL;
+
+   if (environ_cb(RETRO_ENVIRONMENT_GET_VARIABLE, &var) && var.value)
+   {
+      if (strcmp(var.value, "enabled") == 0)
+         Settings.EnableDynarec = true;
+      else
+         Settings.EnableDynarec = false;
+   }
+
+   if (Settings.EnableDynarec && Settings.EnableDynarec != prev_dynarec) {
+      if (DynaReset())
+         Settings.EnableDynarec = false;
+   }
+
+#endif /* USE_DYNAREC */
+
    /* Reinitialise frameskipping, if required */
    if (!first_run &&
        (frameskip_type != prev_frameskip_type))
@@ -827,6 +859,13 @@ void retro_reset(void)
 {
    CPU.Flags = 0;
    S9xSoftReset();
+#ifdef USE_DYNAREC
+   if (Settings.EnableDynarec)
+   {
+      if (DynaReset())
+         Settings.EnableDynarec = false;
+   }
+#endif /* USE_DYNAREC */
 }
 
 size_t retro_serialize_size(void)
-- 
cgit v1.2.3