tcg/mips: fix MIPS32(R2) detection

Fix the MIPS32(R2) cpu detection so that it also works with
-march=octeon. Thanks to Andrew Pinski for the hint.

Cc: Andrew Pinski <apinski@cavium.com>
Signed-off-by: NAurelien Jarno <aurelien@aurel32.net>

tcg/mips/tcg-target.c

@@ -419,7 +419,7 @@ static inline void tcg_out_movi(TCGContext *s, TCGType type,
 
 static inline void tcg_out_bswap16(TCGContext *s, TCGReg ret, TCGReg arg)
 {
-#ifdef _MIPS_ARCH_MIPS32R2
+#if defined(__mips_isa_rev) && (__mips_isa_rev >= 2)
     tcg_out_opc_reg(s, OPC_WSBH, ret, 0, arg);
 #else
     /* ret and arg can't be register at */
@@ -436,7 +436,7 @@ static inline void tcg_out_bswap16(TCGContext *s, TCGReg ret, TCGReg arg)
 
 static inline void tcg_out_bswap16s(TCGContext *s, TCGReg ret, TCGReg arg)
 {
-#ifdef _MIPS_ARCH_MIPS32R2
+#if defined(__mips_isa_rev) && (__mips_isa_rev >= 2)
     tcg_out_opc_reg(s, OPC_WSBH, ret, 0, arg);
     tcg_out_opc_reg(s, OPC_SEH, ret, 0, ret);
 #else
@@ -454,7 +454,7 @@ static inline void tcg_out_bswap16s(TCGContext *s, TCGReg ret, TCGReg arg)
 
 static inline void tcg_out_bswap32(TCGContext *s, TCGReg ret, TCGReg arg)
 {
-#ifdef _MIPS_ARCH_MIPS32R2
+#if defined(__mips_isa_rev) && (__mips_isa_rev >= 2)
     tcg_out_opc_reg(s, OPC_WSBH, ret, 0, arg);
     tcg_out_opc_sa(s, OPC_ROTR, ret, ret, 16);
 #else
@@ -480,7 +480,7 @@ static inline void tcg_out_bswap32(TCGContext *s, TCGReg ret, TCGReg arg)
 
 static inline void tcg_out_ext8s(TCGContext *s, TCGReg ret, TCGReg arg)
 {
-#ifdef _MIPS_ARCH_MIPS32R2
+#if defined(__mips_isa_rev) && (__mips_isa_rev >= 2)
     tcg_out_opc_reg(s, OPC_SEB, ret, 0, arg);
 #else
     tcg_out_opc_sa(s, OPC_SLL, ret, arg, 24);
@@ -490,7 +490,7 @@ static inline void tcg_out_ext8s(TCGContext *s, TCGReg ret, TCGReg arg)
 
 static inline void tcg_out_ext16s(TCGContext *s, TCGReg ret, TCGReg arg)
 {
-#ifdef _MIPS_ARCH_MIPS32R2
+#if defined(__mips_isa_rev) && (__mips_isa_rev >= 2)
     tcg_out_opc_reg(s, OPC_SEH, ret, 0, arg);
 #else
     tcg_out_opc_sa(s, OPC_SLL, ret, arg, 16);

tcg/mips/tcg-target.h

@@ -88,16 +88,16 @@ typedef enum {
 #define TCG_TARGET_HAS_nand_i32         0
 
 /* optional instructions only implemented on MIPS4, MIPS32 and Loongson 2 */
-#if defined(_MIPS_ARCH_MIPS4) || defined(_MIPS_ARCH_MIPS32) || \
-    defined(_MIPS_ARCH_MIPS32R2) || defined(_MIPS_ARCH_LOONGSON2E) || \
-    defined(_MIPS_ARCH_LOONGSON2F)
+#if (defined(__mips_isa_rev) && (__mips_isa_rev >= 1)) || \
+    defined(_MIPS_ARCH_LOONGSON2E) || defined(_MIPS_ARCH_LOONGSON2F) || \
+    defined(_MIPS_ARCH_MIPS4)
 #define TCG_TARGET_HAS_movcond_i32      1
 #else
 #define TCG_TARGET_HAS_movcond_i32      0
 #endif
 
 /* optional instructions only implemented on MIPS32R2 */
-#ifdef _MIPS_ARCH_MIPS32R2
+#if defined(__mips_isa_rev) && (__mips_isa_rev >= 2)
 #define TCG_TARGET_HAS_bswap16_i32      1
 #define TCG_TARGET_HAS_bswap32_i32      1
 #define TCG_TARGET_HAS_rot_i32          1