arm: make sure RunFast is on

seems already to be the case on 3ds at least
libretro · Nov 17, 2024 · f6ede72 · f6ede72
1 parent 0d51542
commit f6ede72
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diff --git a/frontend/main.c b/frontend/main.c
@@ -513,6 +513,16 @@ int emu_core_init(void)
 	SysPrintf("Starting PCSX-ReARMed " REV "%s\n", get_build_info());
 	SysPrintf("build time: " __DATE__ " " __TIME__ "\n");
 
+#if defined(__arm__) && defined(__VFP_FP__)
+	// RunFast mode
+	u32 fpscr = ~0;
+	__asm__ volatile("fmrx %0, fpscr" : "=r"(fpscr));
+	SysPrintf("old fpscr = %08x\n", fpscr);
+	fpscr &= ~0x00009f9f;
+	fpscr |=  0x03000000; // DN | FZ
+	__asm__ volatile("fmxr fpscr, %0" :: "r"(fpscr));
+#endif
+
 #ifdef HAVE_RTHREADS
 	pcsxr_sthread_init();
 #endif

diff --git a/plugins/gpulib/gpulib_thread_if.c b/plugins/gpulib/gpulib_thread_if.c
@@ -76,6 +76,15 @@ static void *video_thread_main(void *arg) {
 	static int processed = 0;
 #endif /* _3DS */
 
+#if defined(__arm__) && defined(__VFP_FP__)
+	// RunFast mode
+	u32 fpscr = ~0;
+	__asm__ volatile("fmrx %0, fpscr" : "=r"(fpscr));
+	fpscr &= ~0x00009f9f;
+	fpscr |=  0x03000000; // DN | FZ
+	__asm__ volatile("fmxr fpscr, %0" :: "r"(fpscr));
+#endif
+
 	while(1) {
 		int result, cycles_dummy = 0, last_cmd, start, end;
 		video_thread_queue *queue;