tcg/mips: Implement field extraction opcodes

Signed-off-by: Richard Henderson <rth@twiddle.net>
diff --git a/tcg/mips/tcg-target.h b/tcg/mips/tcg-target.h
index fcc2986..92d203a 100644
--- a/tcg/mips/tcg-target.h
+++ b/tcg/mips/tcg-target.h
@@ -158,7 +158,7 @@
 #define TCG_TARGET_HAS_movcond_i32      use_movnz_instructions
 #define TCG_TARGET_HAS_bswap16_i32      use_mips32r2_instructions
 #define TCG_TARGET_HAS_deposit_i32      use_mips32r2_instructions
-#define TCG_TARGET_HAS_extract_i32      0
+#define TCG_TARGET_HAS_extract_i32      use_mips32r2_instructions
 #define TCG_TARGET_HAS_sextract_i32     0
 #define TCG_TARGET_HAS_ext8s_i32        use_mips32r2_instructions
 #define TCG_TARGET_HAS_ext16s_i32       use_mips32r2_instructions
@@ -170,6 +170,8 @@
 #define TCG_TARGET_HAS_bswap32_i64      use_mips32r2_instructions
 #define TCG_TARGET_HAS_bswap64_i64      use_mips32r2_instructions
 #define TCG_TARGET_HAS_deposit_i64      use_mips32r2_instructions
+#define TCG_TARGET_HAS_extract_i64      use_mips32r2_instructions
+#define TCG_TARGET_HAS_sextract_i64     0
 #define TCG_TARGET_HAS_ext8s_i64        use_mips32r2_instructions
 #define TCG_TARGET_HAS_ext16s_i64       use_mips32r2_instructions
 #define TCG_TARGET_HAS_rot_i64          use_mips32r2_instructions