MIPS: Add MIPS64 R6 port.

Contributed by Hua Zhang, YunQiang Su from Wave Computing,
and Radovan Birdic from RT-RK.
Sponsored by Wave Computing.

1 files changed, 28 insertions, 1 deletions

diff --git a/src/lj_arch.h b/src/lj_arch.h
index 903d6c64..cd1a0568 100644
--- a/src/lj_arch.h
+++ b/src/lj_arch.h
@@ -330,18 +330,38 @@
 #elif LUAJIT_TARGET == LUAJIT_ARCH_MIPS32 || LUAJIT_TARGET == LUAJIT_ARCH_MIPS64
 
 #if defined(__MIPSEL__) || defined(__MIPSEL) || defined(_MIPSEL)
+#if __mips_isa_rev >= 6
+#define LJ_TARGET_MIPSR6        1
+#define LJ_TARGET_UNALIGNED     1
+#endif
 #if LUAJIT_TARGET == LUAJIT_ARCH_MIPS32
+#if LJ_TARGET_MIPSR6
+#define LJ_ARCH_NAME            "mips32r6el"
+#else
 #define LJ_ARCH_NAME            "mipsel"
+#endif
+#else
+#if LJ_TARGET_MIPSR6
+#define LJ_ARCH_NAME            "mips64r6el"
 #else
 #define LJ_ARCH_NAME            "mips64el"
 #endif
+#endif
 #define LJ_ARCH_ENDIAN          LUAJIT_LE
 #else
 #if LUAJIT_TARGET == LUAJIT_ARCH_MIPS32
+#if LJ_TARGET_MIPSR6
+#define LJ_ARCH_NAME            "mips32r6"
+#else
 #define LJ_ARCH_NAME            "mips"
+#endif
+#else
+#if LJ_TARGET_MIPSR6
+#define LJ_ARCH_NAME            "mips64r6"
 #else
 #define LJ_ARCH_NAME            "mips64"
 #endif
+#endif
 #define LJ_ARCH_ENDIAN          LUAJIT_BE
 #endif
 
@@ -377,7 +397,9 @@
 #define LJ_TARGET_UNIFYROT      2       /* Want only IR_BROR. */
 #define LJ_ARCH_NUMMODE         LJ_NUMMODE_DUAL
 
-#if _MIPS_ARCH_MIPS32R2 || _MIPS_ARCH_MIPS64R2
+#if LJ_TARGET_MIPSR6
+#define LJ_ARCH_VERSION         60
+#elif _MIPS_ARCH_MIPS32R2 || _MIPS_ARCH_MIPS64R2
 #define LJ_ARCH_VERSION         20
 #else
 #define LJ_ARCH_VERSION         10
@@ -453,8 +475,13 @@
 #if !((defined(_MIPS_SIM_ABI32) && _MIPS_SIM == _MIPS_SIM_ABI32) || (defined(_ABIO32) && _MIPS_SIM == _ABIO32))
 #error "Only o32 ABI supported for MIPS32"
 #endif
+#if LJ_TARGET_MIPSR6
+/* Not that useful, since most available r6 CPUs are 64 bit. */
+#error "No support for MIPS32R6"
+#endif
 #elif LJ_TARGET_MIPS64
 #if !((defined(_MIPS_SIM_ABI64) && _MIPS_SIM == _MIPS_SIM_ABI64) || (defined(_ABI64) && _MIPS_SIM == _ABI64))
+/* MIPS32ON64 aka n32 ABI support might be desirable, but difficult. */
 #error "Only n64 ABI supported for MIPS64"
 #endif
 #endif