tcg-s390: new TCG Target

Original patch from Ulrich Hecht, further work from Alexander Graf
and Richard Henderson.

Cc: Ulrich Hecht <uli@suse.de>
Cc: Alexander Graf <agraf@suse.de>
Signed-off-by: NRichard Henderson <rth@twiddle.net>
Signed-off-by: NAurelien Jarno <aurelien@aurel32.net>

configure

@@ -733,10 +733,12 @@ case "$cpu" in
     s390)
            QEMU_CFLAGS="-m31 -march=z990 $QEMU_CFLAGS"
            LDFLAGS="-m31 $LDFLAGS"
+           host_guest_base="yes"
            ;;
     s390x)
            QEMU_CFLAGS="-m64 -march=z990 $QEMU_CFLAGS"
            LDFLAGS="-m64 $LDFLAGS"
+           host_guest_base="yes"
            ;;
     i386)
            QEMU_CFLAGS="-m32 $QEMU_CFLAGS"

tcg/s390/tcg-target.h

@@ -23,10 +23,15 @@
  */
 #define TCG_TARGET_S390 1
 
+#ifdef __s390x__
 #define TCG_TARGET_REG_BITS 64
+#else
+#define TCG_TARGET_REG_BITS 32
+#endif
+
 #define TCG_TARGET_WORDS_BIGENDIAN
 
-enum {
+typedef enum TCGReg {
     TCG_REG_R0 = 0,
     TCG_REG_R1,
     TCG_REG_R2,
@@ -43,44 +48,49 @@ enum {
     TCG_REG_R13,
     TCG_REG_R14,
     TCG_REG_R15
-};
+} TCGReg;
+
 #define TCG_TARGET_NB_REGS 16
 
 /* optional instructions */
-// #define TCG_TARGET_HAS_div_i32
-// #define TCG_TARGET_HAS_rot_i32
-// #define TCG_TARGET_HAS_ext8s_i32
-// #define TCG_TARGET_HAS_ext16s_i32
-// #define TCG_TARGET_HAS_ext8u_i32
-// #define TCG_TARGET_HAS_ext16u_i32
-// #define TCG_TARGET_HAS_bswap16_i32
-// #define TCG_TARGET_HAS_bswap32_i32
+#define TCG_TARGET_HAS_div2_i32
+#define TCG_TARGET_HAS_rot_i32
+#define TCG_TARGET_HAS_ext8s_i32
+#define TCG_TARGET_HAS_ext16s_i32
+#define TCG_TARGET_HAS_ext8u_i32
+#define TCG_TARGET_HAS_ext16u_i32
+#define TCG_TARGET_HAS_bswap16_i32
+#define TCG_TARGET_HAS_bswap32_i32
 // #define TCG_TARGET_HAS_not_i32
-// #define TCG_TARGET_HAS_neg_i32
+#define TCG_TARGET_HAS_neg_i32
 // #define TCG_TARGET_HAS_andc_i32
 // #define TCG_TARGET_HAS_orc_i32
 // #define TCG_TARGET_HAS_eqv_i32
 // #define TCG_TARGET_HAS_nand_i32
 // #define TCG_TARGET_HAS_nor_i32
 
-// #define TCG_TARGET_HAS_div_i64
-// #define TCG_TARGET_HAS_rot_i64
-// #define TCG_TARGET_HAS_ext8s_i64
-// #define TCG_TARGET_HAS_ext16s_i64
-// #define TCG_TARGET_HAS_ext32s_i64
-// #define TCG_TARGET_HAS_ext8u_i64
-// #define TCG_TARGET_HAS_ext16u_i64
-// #define TCG_TARGET_HAS_ext32u_i64
-// #define TCG_TARGET_HAS_bswap16_i64
-// #define TCG_TARGET_HAS_bswap32_i64
-// #define TCG_TARGET_HAS_bswap64_i64
+#if TCG_TARGET_REG_BITS == 64
+#define TCG_TARGET_HAS_div2_i64
+#define TCG_TARGET_HAS_rot_i64
+#define TCG_TARGET_HAS_ext8s_i64
+#define TCG_TARGET_HAS_ext16s_i64
+#define TCG_TARGET_HAS_ext32s_i64
+#define TCG_TARGET_HAS_ext8u_i64
+#define TCG_TARGET_HAS_ext16u_i64
+#define TCG_TARGET_HAS_ext32u_i64
+#define TCG_TARGET_HAS_bswap16_i64
+#define TCG_TARGET_HAS_bswap32_i64
+#define TCG_TARGET_HAS_bswap64_i64
 // #define TCG_TARGET_HAS_not_i64
-// #define TCG_TARGET_HAS_neg_i64
+#define TCG_TARGET_HAS_neg_i64
 // #define TCG_TARGET_HAS_andc_i64
 // #define TCG_TARGET_HAS_orc_i64
 // #define TCG_TARGET_HAS_eqv_i64
 // #define TCG_TARGET_HAS_nand_i64
 // #define TCG_TARGET_HAS_nor_i64
+#endif
+
+#define TCG_TARGET_HAS_GUEST_BASE
 
 /* used for function call generation */
 #define TCG_REG_CALL_STACK		TCG_REG_R15