1 files changed, 48 insertions, 0 deletions
diff --git a/include/dolphin/os/OSFastCast.h b/include/dolphin/os/OSFastCast.h
new file mode 100644
index 0000000..b6ca50d
--- /dev/null
+++ b/include/dolphin/os/OSFastCast.h
@@ -0,0 +1,48 @@
+#ifndef _DOLPHIN_OSFASTCAST
+#define _DOLPHIN_OSFASTCAST
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#define OS_GQR_F32 0x0000
+#define OS_GQR_U8 0x0004
+#define OS_GQR_U16 0x0005
+#define OS_GQR_S8 0x0006
+#define OS_GQR_S16 0x0007
+
+#define OS_FASTCAST_U8 2
+#define OS_FASTCAST_U16 3
+#define OS_FASTCAST_S16 5
+// clang-format off
+static inline void OSInitFastCast(void) {
+#ifdef __MWERKS__
+  asm
+  {
+        li      r3, OS_GQR_U8
+        oris    r3, r3, OS_GQR_U8
+        mtspr   GQR2, r3
+
+        li      r3, OS_GQR_U16
+        oris    r3, r3, OS_GQR_U16
+        mtspr   GQR3, r3
+
+        li      r3, OS_GQR_S8
+        oris    r3, r3, OS_GQR_S8
+        mtspr   GQR4, r3
+
+        li      r3, OS_GQR_S16
+        oris    r3, r3, OS_GQR_S16
+        mtspr   GQR5, r3
+  }
+#else
+
+#endif
+}
+// clang-format off
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif // _DOLPHIN_OSFASTCAST