tcg: Rename tcg-target.c to tcg-target.inc.c

Rename the per-architecture tcg-target.c files to tcg-target.inc.c.
This makes it clearer that they are not intended to be standalone
C files, but are instead #included into another source file.

Reviewed-by: Eric Blake <eblake@redhat.com>
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Message-Id: <1456238983-10160-2-git-send-email-peter.maydell@linaro.org>
Signed-off-by: Richard Henderson <rth@twiddle.net>

1 files changed, 2410 insertions, 0 deletions

diff --git a/tcg/s390/tcg-target.inc.c b/tcg/s390/tcg-target.inc.c
new file mode 100644
index 0000000000..58520fa22b
--- /dev/null
+++ b/tcg/s390/tcg-target.inc.c
@@ -0,0 +1,2410 @@
+/*
+ * Tiny Code Generator for QEMU
+ *
+ * Copyright (c) 2009 Ulrich Hecht <uli@suse.de>
+ * Copyright (c) 2009 Alexander Graf <agraf@suse.de>
+ * Copyright (c) 2010 Richard Henderson <rth@twiddle.net>
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+
+#include "qemu/osdep.h"
+#include "tcg-be-ldst.h"
+
+/* We only support generating code for 64-bit mode.  */
+#if TCG_TARGET_REG_BITS != 64
+#error "unsupported code generation mode"
+#endif
+
+#include "elf.h"
+
+/* ??? The translation blocks produced by TCG are generally small enough to
+   be entirely reachable with a 16-bit displacement.  Leaving the option for
+   a 32-bit displacement here Just In Case.  */
+#define USE_LONG_BRANCHES 0
+
+#define TCG_CT_CONST_MULI  0x100
+#define TCG_CT_CONST_ORI   0x200
+#define TCG_CT_CONST_XORI  0x400
+#define TCG_CT_CONST_CMPI  0x800
+#define TCG_CT_CONST_ADLI  0x1000
+
+/* Several places within the instruction set 0 means "no register"
+   rather than TCG_REG_R0.  */
+#define TCG_REG_NONE    0
+
+/* A scratch register that may be be used throughout the backend.  */
+#define TCG_TMP0        TCG_REG_R14
+
+#ifndef CONFIG_SOFTMMU
+#define TCG_GUEST_BASE_REG TCG_REG_R13
+#endif
+
+/* All of the following instructions are prefixed with their instruction
+   format, and are defined as 8- or 16-bit quantities, even when the two
+   halves of the 16-bit quantity may appear 32 bits apart in the insn.
+   This makes it easy to copy the values from the tables in Appendix B.  */
+typedef enum S390Opcode {
+    RIL_AFI     = 0xc209,
+    RIL_AGFI    = 0xc208,
+    RIL_ALFI    = 0xc20b,
+    RIL_ALGFI   = 0xc20a,
+    RIL_BRASL   = 0xc005,
+    RIL_BRCL    = 0xc004,
+    RIL_CFI     = 0xc20d,
+    RIL_CGFI    = 0xc20c,
+    RIL_CLFI    = 0xc20f,
+    RIL_CLGFI   = 0xc20e,
+    RIL_IIHF    = 0xc008,
+    RIL_IILF    = 0xc009,
+    RIL_LARL    = 0xc000,
+    RIL_LGFI    = 0xc001,
+    RIL_LGRL    = 0xc408,
+    RIL_LLIHF   = 0xc00e,
+    RIL_LLILF   = 0xc00f,
+    RIL_LRL     = 0xc40d,
+    RIL_MSFI    = 0xc201,
+    RIL_MSGFI   = 0xc200,
+    RIL_NIHF    = 0xc00a,
+    RIL_NILF    = 0xc00b,
+    RIL_OIHF    = 0xc00c,
+    RIL_OILF    = 0xc00d,
+    RIL_SLFI    = 0xc205,
+    RIL_SLGFI   = 0xc204,
+    RIL_XIHF    = 0xc006,
+    RIL_XILF    = 0xc007,
+
+    RI_AGHI     = 0xa70b,
+    RI_AHI      = 0xa70a,
+    RI_BRC      = 0xa704,
+    RI_IIHH     = 0xa500,
+    RI_IIHL     = 0xa501,
+    RI_IILH     = 0xa502,
+    RI_IILL     = 0xa503,
+    RI_LGHI     = 0xa709,
+    RI_LLIHH    = 0xa50c,
+    RI_LLIHL    = 0xa50d,
+    RI_LLILH    = 0xa50e,
+    RI_LLILL    = 0xa50f,
+    RI_MGHI     = 0xa70d,
+    RI_MHI      = 0xa70c,
+    RI_NIHH     = 0xa504,
+    RI_NIHL     = 0xa505,
+    RI_NILH     = 0xa506,
+    RI_NILL     = 0xa507,
+    RI_OIHH     = 0xa508,
+    RI_OIHL     = 0xa509,
+    RI_OILH     = 0xa50a,
+    RI_OILL     = 0xa50b,
+
+    RIE_CGIJ    = 0xec7c,
+    RIE_CGRJ    = 0xec64,
+    RIE_CIJ     = 0xec7e,
+    RIE_CLGRJ   = 0xec65,
+    RIE_CLIJ    = 0xec7f,
+    RIE_CLGIJ   = 0xec7d,
+    RIE_CLRJ    = 0xec77,
+    RIE_CRJ     = 0xec76,
+    RIE_RISBG   = 0xec55,
+
+    RRE_AGR     = 0xb908,
+    RRE_ALGR    = 0xb90a,
+    RRE_ALCR    = 0xb998,
+    RRE_ALCGR   = 0xb988,
+    RRE_CGR     = 0xb920,
+    RRE_CLGR    = 0xb921,
+    RRE_DLGR    = 0xb987,
+    RRE_DLR     = 0xb997,
+    RRE_DSGFR   = 0xb91d,
+    RRE_DSGR    = 0xb90d,
+    RRE_LGBR    = 0xb906,
+    RRE_LCGR    = 0xb903,
+    RRE_LGFR    = 0xb914,
+    RRE_LGHR    = 0xb907,
+    RRE_LGR     = 0xb904,
+    RRE_LLGCR   = 0xb984,
+    RRE_LLGFR   = 0xb916,
+    RRE_LLGHR   = 0xb985,
+    RRE_LRVR    = 0xb91f,
+    RRE_LRVGR   = 0xb90f,
+    RRE_LTGR    = 0xb902,
+    RRE_MLGR    = 0xb986,
+    RRE_MSGR    = 0xb90c,
+    RRE_MSR     = 0xb252,
+    RRE_NGR     = 0xb980,
+    RRE_OGR     = 0xb981,
+    RRE_SGR     = 0xb909,
+    RRE_SLGR    = 0xb90b,
+    RRE_SLBR    = 0xb999,
+    RRE_SLBGR   = 0xb989,
+    RRE_XGR     = 0xb982,
+
+    RRF_LOCR    = 0xb9f2,
+    RRF_LOCGR   = 0xb9e2,
+
+    RR_AR       = 0x1a,
+    RR_ALR      = 0x1e,
+    RR_BASR     = 0x0d,
+    RR_BCR      = 0x07,
+    RR_CLR      = 0x15,
+    RR_CR       = 0x19,
+    RR_DR       = 0x1d,
+    RR_LCR      = 0x13,
+    RR_LR       = 0x18,
+    RR_LTR      = 0x12,
+    RR_NR       = 0x14,
+    RR_OR       = 0x16,
+    RR_SR       = 0x1b,
+    RR_SLR      = 0x1f,
+    RR_XR       = 0x17,
+
+    RSY_RLL     = 0xeb1d,
+    RSY_RLLG    = 0xeb1c,
+    RSY_SLLG    = 0xeb0d,
+    RSY_SRAG    = 0xeb0a,
+    RSY_SRLG    = 0xeb0c,
+
+    RS_SLL      = 0x89,
+    RS_SRA      = 0x8a,
+    RS_SRL      = 0x88,
+
+    RXY_AG      = 0xe308,
+    RXY_AY      = 0xe35a,
+    RXY_CG      = 0xe320,
+    RXY_CY      = 0xe359,
+    RXY_LAY     = 0xe371,
+    RXY_LB      = 0xe376,
+    RXY_LG      = 0xe304,
+    RXY_LGB     = 0xe377,
+    RXY_LGF     = 0xe314,
+    RXY_LGH     = 0xe315,
+    RXY_LHY     = 0xe378,
+    RXY_LLGC    = 0xe390,
+    RXY_LLGF    = 0xe316,
+    RXY_LLGH    = 0xe391,
+    RXY_LMG     = 0xeb04,
+    RXY_LRV     = 0xe31e,
+    RXY_LRVG    = 0xe30f,
+    RXY_LRVH    = 0xe31f,
+    RXY_LY      = 0xe358,
+    RXY_STCY    = 0xe372,
+    RXY_STG     = 0xe324,
+    RXY_STHY    = 0xe370,
+    RXY_STMG    = 0xeb24,
+    RXY_STRV    = 0xe33e,
+    RXY_STRVG   = 0xe32f,
+    RXY_STRVH   = 0xe33f,
+    RXY_STY     = 0xe350,
+
+    RX_A        = 0x5a,
+    RX_C        = 0x59,
+    RX_L        = 0x58,
+    RX_LA       = 0x41,
+    RX_LH       = 0x48,
+    RX_ST       = 0x50,
+    RX_STC      = 0x42,
+    RX_STH      = 0x40,
+} S390Opcode;
+
+#ifndef NDEBUG
+static const char * const tcg_target_reg_names[TCG_TARGET_NB_REGS] = {
+    "%r0", "%r1", "%r2", "%r3", "%r4", "%r5", "%r6", "%r7",
+    "%r8", "%r9", "%r10" "%r11" "%r12" "%r13" "%r14" "%r15"
+};
+#endif
+
+/* Since R6 is a potential argument register, choose it last of the
+   call-saved registers.  Likewise prefer the call-clobbered registers
+   in reverse order to maximize the chance of avoiding the arguments.  */
+static const int tcg_target_reg_alloc_order[] = {
+    /* Call saved registers.  */
+    TCG_REG_R13,
+    TCG_REG_R12,
+    TCG_REG_R11,
+    TCG_REG_R10,
+    TCG_REG_R9,
+    TCG_REG_R8,
+    TCG_REG_R7,
+    TCG_REG_R6,
+    /* Call clobbered registers.  */
+    TCG_REG_R14,
+    TCG_REG_R0,
+    TCG_REG_R1,
+    /* Argument registers, in reverse order of allocation.  */
+    TCG_REG_R5,
+    TCG_REG_R4,
+    TCG_REG_R3,
+    TCG_REG_R2,
+};
+
+static const int tcg_target_call_iarg_regs[] = {
+    TCG_REG_R2,
+    TCG_REG_R3,
+    TCG_REG_R4,
+    TCG_REG_R5,
+    TCG_REG_R6,
+};
+
+static const int tcg_target_call_oarg_regs[] = {
+    TCG_REG_R2,
+};
+
+#define S390_CC_EQ      8
+#define S390_CC_LT      4
+#define S390_CC_GT      2
+#define S390_CC_OV      1
+#define S390_CC_NE      (S390_CC_LT | S390_CC_GT)
+#define S390_CC_LE      (S390_CC_LT | S390_CC_EQ)
+#define S390_CC_GE      (S390_CC_GT | S390_CC_EQ)
+#define S390_CC_NEVER   0
+#define S390_CC_ALWAYS  15
+
+/* Condition codes that result from a COMPARE and COMPARE LOGICAL.  */
+static const uint8_t tcg_cond_to_s390_cond[] = {
+    [TCG_COND_EQ]  = S390_CC_EQ,
+    [TCG_COND_NE]  = S390_CC_NE,
+    [TCG_COND_LT]  = S390_CC_LT,
+    [TCG_COND_LE]  = S390_CC_LE,
+    [TCG_COND_GT]  = S390_CC_GT,
+    [TCG_COND_GE]  = S390_CC_GE,
+    [TCG_COND_LTU] = S390_CC_LT,
+    [TCG_COND_LEU] = S390_CC_LE,
+    [TCG_COND_GTU] = S390_CC_GT,
+    [TCG_COND_GEU] = S390_CC_GE,
+};
+
+/* Condition codes that result from a LOAD AND TEST.  Here, we have no
+   unsigned instruction variation, however since the test is vs zero we
+   can re-map the outcomes appropriately.  */
+static const uint8_t tcg_cond_to_ltr_cond[] = {
+    [TCG_COND_EQ]  = S390_CC_EQ,
+    [TCG_COND_NE]  = S390_CC_NE,
+    [TCG_COND_LT]  = S390_CC_LT,
+    [TCG_COND_LE]  = S390_CC_LE,
+    [TCG_COND_GT]  = S390_CC_GT,
+    [TCG_COND_GE]  = S390_CC_GE,
+    [TCG_COND_LTU] = S390_CC_NEVER,
+    [TCG_COND_LEU] = S390_CC_EQ,
+    [TCG_COND_GTU] = S390_CC_NE,
+    [TCG_COND_GEU] = S390_CC_ALWAYS,
+};
+
+#ifdef CONFIG_SOFTMMU
+static void * const qemu_ld_helpers[16] = {
+    [MO_UB]   = helper_ret_ldub_mmu,
+    [MO_SB]   = helper_ret_ldsb_mmu,
+    [MO_LEUW] = helper_le_lduw_mmu,
+    [MO_LESW] = helper_le_ldsw_mmu,
+    [MO_LEUL] = helper_le_ldul_mmu,
+    [MO_LESL] = helper_le_ldsl_mmu,
+    [MO_LEQ]  = helper_le_ldq_mmu,
+    [MO_BEUW] = helper_be_lduw_mmu,
+    [MO_BESW] = helper_be_ldsw_mmu,
+    [MO_BEUL] = helper_be_ldul_mmu,
+    [MO_BESL] = helper_be_ldsl_mmu,
+    [MO_BEQ]  = helper_be_ldq_mmu,
+};
+
+static void * const qemu_st_helpers[16] = {
+    [MO_UB]   = helper_ret_stb_mmu,
+    [MO_LEUW] = helper_le_stw_mmu,
+    [MO_LEUL] = helper_le_stl_mmu,
+    [MO_LEQ]  = helper_le_stq_mmu,
+    [MO_BEUW] = helper_be_stw_mmu,
+    [MO_BEUL] = helper_be_stl_mmu,
+    [MO_BEQ]  = helper_be_stq_mmu,
+};
+#endif
+
+static tcg_insn_unit *tb_ret_addr;
+
+/* A list of relevant facilities used by this translator.  Some of these
+   are required for proper operation, and these are checked at startup.  */
+
+#define FACILITY_ZARCH_ACTIVE	(1ULL << (63 - 2))
+#define FACILITY_LONG_DISP	(1ULL << (63 - 18))
+#define FACILITY_EXT_IMM	(1ULL << (63 - 21))
+#define FACILITY_GEN_INST_EXT	(1ULL << (63 - 34))
+#define FACILITY_LOAD_ON_COND   (1ULL << (63 - 45))
+
+static uint64_t facilities;
+
+static void patch_reloc(tcg_insn_unit *code_ptr, int type,
+                        intptr_t value, intptr_t addend)
+{
+    intptr_t pcrel2 = (tcg_insn_unit *)value - (code_ptr - 1);
+    assert(addend == -2);
+
+    switch (type) {
+    case R_390_PC16DBL:
+        assert(pcrel2 == (int16_t)pcrel2);
+        tcg_patch16(code_ptr, pcrel2);
+        break;
+    case R_390_PC32DBL:
+        assert(pcrel2 == (int32_t)pcrel2);
+        tcg_patch32(code_ptr, pcrel2);
+        break;
+    default:
+        tcg_abort();
+        break;
+    }
+}
+
+/* parse target specific constraints */
+static int target_parse_constraint(TCGArgConstraint *ct, const char **pct_str)
+{
+    const char *ct_str = *pct_str;
+
+    switch (ct_str[0]) {
+    case 'r':                  /* all registers */
+        ct->ct |= TCG_CT_REG;
+        tcg_regset_set32(ct->u.regs, 0, 0xffff);
+        break;
+    case 'R':                  /* not R0 */
+        ct->ct |= TCG_CT_REG;
+        tcg_regset_set32(ct->u.regs, 0, 0xffff);
+        tcg_regset_reset_reg(ct->u.regs, TCG_REG_R0);
+        break;
+    case 'L':                  /* qemu_ld/st constraint */
+        ct->ct |= TCG_CT_REG;
+        tcg_regset_set32(ct->u.regs, 0, 0xffff);
+        tcg_regset_reset_reg (ct->u.regs, TCG_REG_R2);
+        tcg_regset_reset_reg (ct->u.regs, TCG_REG_R3);
+        tcg_regset_reset_reg (ct->u.regs, TCG_REG_R4);
+        break;
+    case 'a':                  /* force R2 for division */
+        ct->ct |= TCG_CT_REG;
+        tcg_regset_clear(ct->u.regs);
+        tcg_regset_set_reg(ct->u.regs, TCG_REG_R2);
+        break;
+    case 'b':                  /* force R3 for division */
+        ct->ct |= TCG_CT_REG;
+        tcg_regset_clear(ct->u.regs);
+        tcg_regset_set_reg(ct->u.regs, TCG_REG_R3);
+        break;
+    case 'A':
+        ct->ct |= TCG_CT_CONST_ADLI;
+        break;
+    case 'K':
+        ct->ct |= TCG_CT_CONST_MULI;
+        break;
+    case 'O':
+        ct->ct |= TCG_CT_CONST_ORI;
+        break;
+    case 'X':
+        ct->ct |= TCG_CT_CONST_XORI;
+        break;
+    case 'C':
+        ct->ct |= TCG_CT_CONST_CMPI;
+        break;
+    default:
+        return -1;
+    }
+    ct_str++;
+    *pct_str = ct_str;
+
+    return 0;
+}
+
+/* Immediates to be used with logical OR.  This is an optimization only,
+   since a full 64-bit immediate OR can always be performed with 4 sequential
+   OI[LH][LH] instructions.  What we're looking for is immediates that we
+   can load efficiently, and the immediate load plus the reg-reg OR is
+   smaller than the sequential OI's.  */
+
+static int tcg_match_ori(TCGType type, tcg_target_long val)
+{
+    if (facilities & FACILITY_EXT_IMM) {
+        if (type == TCG_TYPE_I32) {
+            /* All 32-bit ORs can be performed with 1 48-bit insn.  */
+            return 1;
+        }
+    }
+
+    /* Look for negative values.  These are best to load with LGHI.  */
+    if (val < 0) {
+        if (val == (int16_t)val) {
+            return 0;
+        }
+        if (facilities & FACILITY_EXT_IMM) {
+            if (val == (int32_t)val) {
+                return 0;
+            }
+        }
+    }
+
+    return 1;
+}
+
+/* Immediates to be used with logical XOR.  This is almost, but not quite,
+   only an optimization.  XOR with immediate is only supported with the
+   extended-immediate facility.  That said, there are a few patterns for
+   which it is better to load the value into a register first.  */
+
+static int tcg_match_xori(TCGType type, tcg_target_long val)
+{
+    if ((facilities & FACILITY_EXT_IMM) == 0) {
+        return 0;
+    }
+
+    if (type == TCG_TYPE_I32) {
+        /* All 32-bit XORs can be performed with 1 48-bit insn.  */
+        return 1;
+    }
+
+    /* Look for negative values.  These are best to load with LGHI.  */
+    if (val < 0 && val == (int32_t)val) {
+        return 0;
+    }
+
+    return 1;
+}
+
+/* Imediates to be used with comparisons.  */
+
+static int tcg_match_cmpi(TCGType type, tcg_target_long val)
+{
+    if (facilities & FACILITY_EXT_IMM) {
+        /* The COMPARE IMMEDIATE instruction is available.  */
+        if (type == TCG_TYPE_I32) {
+            /* We have a 32-bit immediate and can compare against anything.  */
+            return 1;
+        } else {
+            /* ??? We have no insight here into whether the comparison is
+               signed or unsigned.  The COMPARE IMMEDIATE insn uses a 32-bit
+               signed immediate, and the COMPARE LOGICAL IMMEDIATE insn uses
+               a 32-bit unsigned immediate.  If we were to use the (semi)
+               obvious "val == (int32_t)val" we would be enabling unsigned
+               comparisons vs very large numbers.  The only solution is to
+               take the intersection of the ranges.  */
+            /* ??? Another possible solution is to simply lie and allow all
+               constants here and force the out-of-range values into a temp
+               register in tgen_cmp when we have knowledge of the actual
+               comparison code in use.  */
+            return val >= 0 && val <= 0x7fffffff;
+        }
+    } else {
+        /* Only the LOAD AND TEST instruction is available.  */
+        return val == 0;
+    }
+}
+
+/* Immediates to be used with add2/sub2.  */
+
+static int tcg_match_add2i(TCGType type, tcg_target_long val)
+{
+    if (facilities & FACILITY_EXT_IMM) {
+        if (type == TCG_TYPE_I32) {
+            return 1;
+        } else if (val >= -0xffffffffll && val <= 0xffffffffll) {
+            return 1;
+        }
+    }
+    return 0;
+}
+
+/* Test if a constant matches the constraint. */
+static int tcg_target_const_match(tcg_target_long val, TCGType type,
+                                  const TCGArgConstraint *arg_ct)
+{
+    int ct = arg_ct->ct;
+
+    if (ct & TCG_CT_CONST) {
+        return 1;
+    }
+
+    if (type == TCG_TYPE_I32) {
+        val = (int32_t)val;
+    }
+
+    /* The following are mutually exclusive.  */
+    if (ct & TCG_CT_CONST_MULI) {
+        /* Immediates that may be used with multiply.  If we have the
+           general-instruction-extensions, then we have MULTIPLY SINGLE
+           IMMEDIATE with a signed 32-bit, otherwise we have only
+           MULTIPLY HALFWORD IMMEDIATE, with a signed 16-bit.  */
+        if (facilities & FACILITY_GEN_INST_EXT) {
+            return val == (int32_t)val;
+        } else {
+            return val == (int16_t)val;
+        }
+    } else if (ct & TCG_CT_CONST_ADLI) {
+        return tcg_match_add2i(type, val);
+    } else if (ct & TCG_CT_CONST_ORI) {
+        return tcg_match_ori(type, val);
+    } else if (ct & TCG_CT_CONST_XORI) {
+        return tcg_match_xori(type, val);
+    } else if (ct & TCG_CT_CONST_CMPI) {
+        return tcg_match_cmpi(type, val);
+    }
+
+    return 0;
+}
+
+/* Emit instructions according to the given instruction format.  */
+
+static void tcg_out_insn_RR(TCGContext *s, S390Opcode op, TCGReg r1, TCGReg r2)
+{
+    tcg_out16(s, (op << 8) | (r1 << 4) | r2);
+}
+
+static void tcg_out_insn_RRE(TCGContext *s, S390Opcode op,
+                             TCGReg r1, TCGReg r2)
+{
+    tcg_out32(s, (op << 16) | (r1 << 4) | r2);
+}
+
+static void tcg_out_insn_RRF(TCGContext *s, S390Opcode op,
+                             TCGReg r1, TCGReg r2, int m3)
+{
+    tcg_out32(s, (op << 16) | (m3 << 12) | (r1 << 4) | r2);
+}
+
+static void tcg_out_insn_RI(TCGContext *s, S390Opcode op, TCGReg r1, int i2)
+{
+    tcg_out32(s, (op << 16) | (r1 << 20) | (i2 & 0xffff));
+}
+
+static void tcg_out_insn_RIL(TCGContext *s, S390Opcode op, TCGReg r1, int i2)
+{
+    tcg_out16(s, op | (r1 << 4));
+    tcg_out32(s, i2);
+}
+
+static void tcg_out_insn_RS(TCGContext *s, S390Opcode op, TCGReg r1,
+                            TCGReg b2, TCGReg r3, int disp)
+{
+    tcg_out32(s, (op << 24) | (r1 << 20) | (r3 << 16) | (b2 << 12)
+              | (disp & 0xfff));
+}
+
+static void tcg_out_insn_RSY(TCGContext *s, S390Opcode op, TCGReg r1,
+                             TCGReg b2, TCGReg r3, int disp)
+{
+    tcg_out16(s, (op & 0xff00) | (r1 << 4) | r3);
+    tcg_out32(s, (op & 0xff) | (b2 << 28)
+              | ((disp & 0xfff) << 16) | ((disp & 0xff000) >> 4));
+}
+
+#define tcg_out_insn_RX   tcg_out_insn_RS
+#define tcg_out_insn_RXY  tcg_out_insn_RSY
+
+/* Emit an opcode with "type-checking" of the format.  */
+#define tcg_out_insn(S, FMT, OP, ...) \
+    glue(tcg_out_insn_,FMT)(S, glue(glue(FMT,_),OP), ## __VA_ARGS__)
+
+
+/* emit 64-bit shifts */
+static void tcg_out_sh64(TCGContext* s, S390Opcode op, TCGReg dest,
+                         TCGReg src, TCGReg sh_reg, int sh_imm)
+{
+    tcg_out_insn_RSY(s, op, dest, sh_reg, src, sh_imm);
+}
+
+/* emit 32-bit shifts */
+static void tcg_out_sh32(TCGContext* s, S390Opcode op, TCGReg dest,
+                         TCGReg sh_reg, int sh_imm)
+{
+    tcg_out_insn_RS(s, op, dest, sh_reg, 0, sh_imm);
+}
+
+static void tcg_out_mov(TCGContext *s, TCGType type, TCGReg dst, TCGReg src)
+{
+    if (src != dst) {
+        if (type == TCG_TYPE_I32) {
+            tcg_out_insn(s, RR, LR, dst, src);
+        } else {
+            tcg_out_insn(s, RRE, LGR, dst, src);
+        }
+    }
+}
+
+/* load a register with an immediate value */
+static void tcg_out_movi(TCGContext *s, TCGType type,
+                         TCGReg ret, tcg_target_long sval)
+{
+    static const S390Opcode lli_insns[4] = {
+        RI_LLILL, RI_LLILH, RI_LLIHL, RI_LLIHH
+    };
+
+    tcg_target_ulong uval = sval;
+    int i;
+
+    if (type == TCG_TYPE_I32) {
+        uval = (uint32_t)sval;
+        sval = (int32_t)sval;
+    }
+
+    /* Try all 32-bit insns that can load it in one go.  */
+    if (sval >= -0x8000 && sval < 0x8000) {
+        tcg_out_insn(s, RI, LGHI, ret, sval);
+        return;
+    }
+
+    for (i = 0; i < 4; i++) {
+        tcg_target_long mask = 0xffffull << i*16;
+        if ((uval & mask) == uval) {
+            tcg_out_insn_RI(s, lli_insns[i], ret, uval >> i*16);
+            return;
+        }
+    }
+
+    /* Try all 48-bit insns that can load it in one go.  */
+    if (facilities & FACILITY_EXT_IMM) {
+        if (sval == (int32_t)sval) {
+            tcg_out_insn(s, RIL, LGFI, ret, sval);
+            return;
+        }
+        if (uval <= 0xffffffff) {
+            tcg_out_insn(s, RIL, LLILF, ret, uval);
+            return;
+        }
+        if ((uval & 0xffffffff) == 0) {
+            tcg_out_insn(s, RIL, LLIHF, ret, uval >> 31 >> 1);
+            return;
+        }
+    }
+
+    /* Try for PC-relative address load.  */
+    if ((sval & 1) == 0) {
+        ptrdiff_t off = tcg_pcrel_diff(s, (void *)sval) >> 1;
+        if (off == (int32_t)off) {
+            tcg_out_insn(s, RIL, LARL, ret, off);
+            return;
+        }
+    }
+
+    /* If extended immediates are not present, then we may have to issue
+       several instructions to load the low 32 bits.  */
+    if (!(facilities & FACILITY_EXT_IMM)) {
+        /* A 32-bit unsigned value can be loaded in 2 insns.  And given
+           that the lli_insns loop above did not succeed, we know that
+           both insns are required.  */
+        if (uval <= 0xffffffff) {
+            tcg_out_insn(s, RI, LLILL, ret, uval);
+            tcg_out_insn(s, RI, IILH, ret, uval >> 16);
+            return;
+        }
+
+        /* If all high bits are set, the value can be loaded in 2 or 3 insns.
+           We first want to make sure that all the high bits get set.  With
+           luck the low 16-bits can be considered negative to perform that for
+           free, otherwise we load an explicit -1.  */
+        if (sval >> 31 >> 1 == -1) {
+            if (uval & 0x8000) {
+                tcg_out_insn(s, RI, LGHI, ret, uval);
+            } else {
+                tcg_out_insn(s, RI, LGHI, ret, -1);
+                tcg_out_insn(s, RI, IILL, ret, uval);
+            }
+            tcg_out_insn(s, RI, IILH, ret, uval >> 16);
+            return;
+        }
+    }
+
+    /* If we get here, both the high and low parts have non-zero bits.  */
+
+    /* Recurse to load the lower 32-bits.  */
+    tcg_out_movi(s, TCG_TYPE_I64, ret, uval & 0xffffffff);
+
+    /* Insert data into the high 32-bits.  */
+    uval = uval >> 31 >> 1;
+    if (facilities & FACILITY_EXT_IMM) {
+        if (uval < 0x10000) {
+            tcg_out_insn(s, RI, IIHL, ret, uval);
+        } else if ((uval & 0xffff) == 0) {
+            tcg_out_insn(s, RI, IIHH, ret, uval >> 16);
+        } else {
+            tcg_out_insn(s, RIL, IIHF, ret, uval);
+        }
+    } else {
+        if (uval & 0xffff) {
+            tcg_out_insn(s, RI, IIHL, ret, uval);
+        }
+        if (uval & 0xffff0000) {
+            tcg_out_insn(s, RI, IIHH, ret, uval >> 16);
+        }
+    }
+}
+
+
+/* Emit a load/store type instruction.  Inputs are:
+   DATA:     The register to be loaded or stored.
+   BASE+OFS: The effective address.
+   OPC_RX:   If the operation has an RX format opcode (e.g. STC), otherwise 0.
+   OPC_RXY:  The RXY format opcode for the operation (e.g. STCY).  */
+
+static void tcg_out_mem(TCGContext *s, S390Opcode opc_rx, S390Opcode opc_rxy,
+                        TCGReg data, TCGReg base, TCGReg index,
+                        tcg_target_long ofs)
+{
+    if (ofs < -0x80000 || ofs >= 0x80000) {
+        /* Combine the low 20 bits of the offset with the actual load insn;
+           the high 44 bits must come from an immediate load.  */
+        tcg_target_long low = ((ofs & 0xfffff) ^ 0x80000) - 0x80000;
+        tcg_out_movi(s, TCG_TYPE_PTR, TCG_TMP0, ofs - low);
+        ofs = low;
+
+        /* If we were already given an index register, add it in.  */
+        if (index != TCG_REG_NONE) {
+            tcg_out_insn(s, RRE, AGR, TCG_TMP0, index);
+        }
+        index = TCG_TMP0;
+    }
+
+    if (opc_rx && ofs >= 0 && ofs < 0x1000) {
+        tcg_out_insn_RX(s, opc_rx, data, base, index, ofs);
+    } else {
+        tcg_out_insn_RXY(s, opc_rxy, data, base, index, ofs);
+    }
+}
+
+
+/* load data without address translation or endianness conversion */
+static inline void tcg_out_ld(TCGContext *s, TCGType type, TCGReg data,
+                              TCGReg base, intptr_t ofs)
+{
+    if (type == TCG_TYPE_I32) {
+        tcg_out_mem(s, RX_L, RXY_LY, data, base, TCG_REG_NONE, ofs);
+    } else {
+        tcg_out_mem(s, 0, RXY_LG, data, base, TCG_REG_NONE, ofs);
+    }
+}
+
+static inline void tcg_out_st(TCGContext *s, TCGType type, TCGReg data,
+                              TCGReg base, intptr_t ofs)
+{
+    if (type == TCG_TYPE_I32) {
+        tcg_out_mem(s, RX_ST, RXY_STY, data, base, TCG_REG_NONE, ofs);
+    } else {
+        tcg_out_mem(s, 0, RXY_STG, data, base, TCG_REG_NONE, ofs);
+    }
+}
+
+/* load data from an absolute host address */
+static void tcg_out_ld_abs(TCGContext *s, TCGType type, TCGReg dest, void *abs)
+{
+    intptr_t addr = (intptr_t)abs;
+
+    if ((facilities & FACILITY_GEN_INST_EXT) && !(addr & 1)) {
+        ptrdiff_t disp = tcg_pcrel_diff(s, abs) >> 1;
+        if (disp == (int32_t)disp) {
+            if (type == TCG_TYPE_I32) {
+                tcg_out_insn(s, RIL, LRL, dest, disp);
+            } else {
+                tcg_out_insn(s, RIL, LGRL, dest, disp);
+            }
+            return;
+        }
+    }
+
+    tcg_out_movi(s, TCG_TYPE_PTR, dest, addr & ~0xffff);
+    tcg_out_ld(s, type, dest, dest, addr & 0xffff);
+}
+
+static inline void tcg_out_risbg(TCGContext *s, TCGReg dest, TCGReg src,
+                                 int msb, int lsb, int ofs, int z)
+{
+    /* Format RIE-f */
+    tcg_out16(s, (RIE_RISBG & 0xff00) | (dest << 4) | src);
+    tcg_out16(s, (msb << 8) | (z << 7) | lsb);
+    tcg_out16(s, (ofs << 8) | (RIE_RISBG & 0xff));
+}
+
+static void tgen_ext8s(TCGContext *s, TCGType type, TCGReg dest, TCGReg src)
+{
+    if (facilities & FACILITY_EXT_IMM) {
+        tcg_out_insn(s, RRE, LGBR, dest, src);
+        return;
+    }
+
+    if (type == TCG_TYPE_I32) {
+        if (dest == src) {
+            tcg_out_sh32(s, RS_SLL, dest, TCG_REG_NONE, 24);
+        } else {
+            tcg_out_sh64(s, RSY_SLLG, dest, src, TCG_REG_NONE, 24);
+        }
+        tcg_out_sh32(s, RS_SRA, dest, TCG_REG_NONE, 24);
+    } else {
+        tcg_out_sh64(s, RSY_SLLG, dest, src, TCG_REG_NONE, 56);
+        tcg_out_sh64(s, RSY_SRAG, dest, dest, TCG_REG_NONE, 56);
+    }
+}
+
+static void tgen_ext8u(TCGContext *s, TCGType type, TCGReg dest, TCGReg src)
+{
+    if (facilities & FACILITY_EXT_IMM) {
+        tcg_out_insn(s, RRE, LLGCR, dest, src);
+        return;
+    }
+
+    if (dest == src) {
+        tcg_out_movi(s, type, TCG_TMP0, 0xff);
+        src = TCG_TMP0;
+    } else {
+        tcg_out_movi(s, type, dest, 0xff);
+    }
+    if (type == TCG_TYPE_I32) {
+        tcg_out_insn(s, RR, NR, dest, src);
+    } else {
+        tcg_out_insn(s, RRE, NGR, dest, src);
+    }
+}
+
+static void tgen_ext16s(TCGContext *s, TCGType type, TCGReg dest, TCGReg src)
+{
+    if (facilities & FACILITY_EXT_IMM) {
+        tcg_out_insn(s, RRE, LGHR, dest, src);
+        return;
+    }
+
+    if (type == TCG_TYPE_I32) {
+        if (dest == src) {
+            tcg_out_sh32(s, RS_SLL, dest, TCG_REG_NONE, 16);
+        } else {
+            tcg_out_sh64(s, RSY_SLLG, dest, src, TCG_REG_NONE, 16);
+        }
+        tcg_out_sh32(s, RS_SRA, dest, TCG_REG_NONE, 16);
+    } else {
+        tcg_out_sh64(s, RSY_SLLG, dest, src, TCG_REG_NONE, 48);
+        tcg_out_sh64(s, RSY_SRAG, dest, dest, TCG_REG_NONE, 48);
+    }
+}
+
+static void tgen_ext16u(TCGContext *s, TCGType type, TCGReg dest, TCGReg src)
+{
+    if (facilities & FACILITY_EXT_IMM) {
+        tcg_out_insn(s, RRE, LLGHR, dest, src);
+        return;
+    }
+
+    if (dest == src) {
+        tcg_out_movi(s, type, TCG_TMP0, 0xffff);
+        src = TCG_TMP0;
+    } else {
+        tcg_out_movi(s, type, dest, 0xffff);
+    }
+    if (type == TCG_TYPE_I32) {
+        tcg_out_insn(s, RR, NR, dest, src);
+    } else {
+        tcg_out_insn(s, RRE, NGR, dest, src);
+    }
+}
+
+static inline void tgen_ext32s(TCGContext *s, TCGReg dest, TCGReg src)
+{
+    tcg_out_insn(s, RRE, LGFR, dest, src);
+}
+
+static inline void tgen_ext32u(TCGContext *s, TCGReg dest, TCGReg src)
+{
+    tcg_out_insn(s, RRE, LLGFR, dest, src);
+}
+
+/* Accept bit patterns like these:
+    0....01....1
+    1....10....0
+    1..10..01..1
+    0..01..10..0
+   Copied from gcc sources.  */
+static inline bool risbg_mask(uint64_t c)
+{
+    uint64_t lsb;
+    /* We don't change the number of transitions by inverting,
+       so make sure we start with the LSB zero.  */
+    if (c & 1) {
+        c = ~c;
+    }
+    /* Reject all zeros or all ones.  */
+    if (c == 0) {
+        return false;
+    }
+    /* Find the first transition.  */
+    lsb = c & -c;
+    /* Invert to look for a second transition.  */
+    c = ~c;
+    /* Erase the first transition.  */
+    c &= -lsb;
+    /* Find the second transition, if any.  */
+    lsb = c & -c;
+    /* Match if all the bits are 1's, or if c is zero.  */
+    return c == -lsb;
+}
+
+static void tgen_andi_risbg(TCGContext *s, TCGReg out, TCGReg in, uint64_t val)
+{
+    int msb, lsb;
+    if ((val & 0x8000000000000001ull) == 0x8000000000000001ull) {
+        /* Achieve wraparound by swapping msb and lsb.  */
+        msb = 64 - ctz64(~val);
+        lsb = clz64(~val) - 1;
+    } else {
+        msb = clz64(val);
+        lsb = 63 - ctz64(val);
+    }
+    tcg_out_risbg(s, out, in, msb, lsb, 0, 1);
+}
+
+static void tgen_andi(TCGContext *s, TCGType type, TCGReg dest, uint64_t val)
+{
+    static const S390Opcode ni_insns[4] = {
+        RI_NILL, RI_NILH, RI_NIHL, RI_NIHH
+    };
+    static const S390Opcode nif_insns[2] = {
+        RIL_NILF, RIL_NIHF
+    };
+    uint64_t valid = (type == TCG_TYPE_I32 ? 0xffffffffull : -1ull);
+    int i;
+
+    /* Look for the zero-extensions.  */
+    if ((val & valid) == 0xffffffff) {
+        tgen_ext32u(s, dest, dest);
+        return;
+    }
+    if (facilities & FACILITY_EXT_IMM) {
+        if ((val & valid) == 0xff) {
+            tgen_ext8u(s, TCG_TYPE_I64, dest, dest);
+            return;
+        }
+        if ((val & valid) == 0xffff) {
+            tgen_ext16u(s, TCG_TYPE_I64, dest, dest);
+            return;
+        }
+    }
+
+    /* Try all 32-bit insns that can perform it in one go.  */
+    for (i = 0; i < 4; i++) {
+        tcg_target_ulong mask = ~(0xffffull << i*16);
+        if (((val | ~valid) & mask) == mask) {
+            tcg_out_insn_RI(s, ni_insns[i], dest, val >> i*16);
+            return;
+        }
+    }
+
+    /* Try all 48-bit insns that can perform it in one go.  */
+    if (facilities & FACILITY_EXT_IMM) {
+        for (i = 0; i < 2; i++) {
+            tcg_target_ulong mask = ~(0xffffffffull << i*32);
+            if (((val | ~valid) & mask) == mask) {
+                tcg_out_insn_RIL(s, nif_insns[i], dest, val >> i*32);
+                return;
+            }
+        }
+    }
+    if ((facilities & FACILITY_GEN_INST_EXT) && risbg_mask(val)) {
+        tgen_andi_risbg(s, dest, dest, val);
+        return;
+    }
+
+    /* Fall back to loading the constant.  */
+    tcg_out_movi(s, type, TCG_TMP0, val);
+    if (type == TCG_TYPE_I32) {
+        tcg_out_insn(s, RR, NR, dest, TCG_TMP0);
+    } else {
+        tcg_out_insn(s, RRE, NGR, dest, TCG_TMP0);
+    }
+}
+
+static void tgen64_ori(TCGContext *s, TCGReg dest, tcg_target_ulong val)
+{
+    static const S390Opcode oi_insns[4] = {
+        RI_OILL, RI_OILH, RI_OIHL, RI_OIHH
+    };
+    static const S390Opcode nif_insns[2] = {
+        RIL_OILF, RIL_OIHF
+    };
+
+    int i;
+
+    /* Look for no-op.  */
+    if (val == 0) {
+        return;
+    }
+
+    if (facilities & FACILITY_EXT_IMM) {
+        /* Try all 32-bit insns that can perform it in one go.  */
+        for (i = 0; i < 4; i++) {
+            tcg_target_ulong mask = (0xffffull << i*16);
+            if ((val & mask) != 0 && (val & ~mask) == 0) {
+                tcg_out_insn_RI(s, oi_insns[i], dest, val >> i*16);
+                return;
+            }
+        }
+
+        /* Try all 48-bit insns that can perform it in one go.  */
+        for (i = 0; i < 2; i++) {
+            tcg_target_ulong mask = (0xffffffffull << i*32);
+            if ((val & mask) != 0 && (val & ~mask) == 0) {
+                tcg_out_insn_RIL(s, nif_insns[i], dest, val >> i*32);
+                return;
+            }
+        }
+
+        /* Perform the OR via sequential modifications to the high and
+           low parts.  Do this via recursion to handle 16-bit vs 32-bit
+           masks in each half.  */
+        tgen64_ori(s, dest, val & 0x00000000ffffffffull);
+        tgen64_ori(s, dest, val & 0xffffffff00000000ull);
+    } else {
+        /* With no extended-immediate facility, we don't need to be so
+           clever.  Just iterate over the insns and mask in the constant.  */
+        for (i = 0; i < 4; i++) {
+            tcg_target_ulong mask = (0xffffull << i*16);
+            if ((val & mask) != 0) {
+                tcg_out_insn_RI(s, oi_insns[i], dest, val >> i*16);
+            }
+        }
+    }
+}
+
+static void tgen64_xori(TCGContext *s, TCGReg dest, tcg_target_ulong val)
+{
+    /* Perform the xor by parts.  */
+    if (val & 0xffffffff) {
+        tcg_out_insn(s, RIL, XILF, dest, val);
+    }
+    if (val > 0xffffffff) {
+        tcg_out_insn(s, RIL, XIHF, dest, val >> 31 >> 1);
+    }
+}
+
+static int tgen_cmp(TCGContext *s, TCGType type, TCGCond c, TCGReg r1,
+                    TCGArg c2, int c2const)
+{
+    bool is_unsigned = is_unsigned_cond(c);
+    if (c2const) {
+        if (c2 == 0) {
+            if (type == TCG_TYPE_I32) {
+                tcg_out_insn(s, RR, LTR, r1, r1);
+            } else {
+                tcg_out_insn(s, RRE, LTGR, r1, r1);
+            }
+            return tcg_cond_to_ltr_cond[c];
+        } else {
+            if (is_unsigned) {
+                if (type == TCG_TYPE_I32) {
+                    tcg_out_insn(s, RIL, CLFI, r1, c2);
+                } else {
+                    tcg_out_insn(s, RIL, CLGFI, r1, c2);
+                }
+            } else {
+                if (type == TCG_TYPE_I32) {
+                    tcg_out_insn(s, RIL, CFI, r1, c2);
+                } else {
+                    tcg_out_insn(s, RIL, CGFI, r1, c2);
+                }
+            }
+        }
+    } else {
+        if (is_unsigned) {
+            if (type == TCG_TYPE_I32) {
+                tcg_out_insn(s, RR, CLR, r1, c2);
+            } else {
+                tcg_out_insn(s, RRE, CLGR, r1, c2);
+            }
+        } else {
+            if (type == TCG_TYPE_I32) {
+                tcg_out_insn(s, RR, CR, r1, c2);
+            } else {
+                tcg_out_insn(s, RRE, CGR, r1, c2);
+            }
+        }
+    }
+    return tcg_cond_to_s390_cond[c];
+}
+
+static void tgen_setcond(TCGContext *s, TCGType type, TCGCond cond,
+                         TCGReg dest, TCGReg c1, TCGArg c2, int c2const)
+{
+    int cc;
+
+    switch (cond) {
+    case TCG_COND_GTU:
+    case TCG_COND_GT:
+    do_greater:
+        /* The result of a compare has CC=2 for GT and CC=3 unused.
+           ADD LOGICAL WITH CARRY considers (CC & 2) the carry bit.  */
+        tgen_cmp(s, type, cond, c1, c2, c2const);
+        tcg_out_movi(s, type, dest, 0);
+        tcg_out_insn(s, RRE, ALCGR, dest, dest);
+        return;
+
+    case TCG_COND_GEU:
+    do_geu:
+        /* We need "real" carry semantics, so use SUBTRACT LOGICAL
+           instead of COMPARE LOGICAL.  This needs an extra move.  */
+        tcg_out_mov(s, type, TCG_TMP0, c1);
+        if (c2const) {
+            tcg_out_movi(s, TCG_TYPE_I64, dest, 0);
+            if (type == TCG_TYPE_I32) {
+                tcg_out_insn(s, RIL, SLFI, TCG_TMP0, c2);
+            } else {
+                tcg_out_insn(s, RIL, SLGFI, TCG_TMP0, c2);
+            }
+        } else {
+            if (type == TCG_TYPE_I32) {
+                tcg_out_insn(s, RR, SLR, TCG_TMP0, c2);
+            } else {
+                tcg_out_insn(s, RRE, SLGR, TCG_TMP0, c2);
+            }
+            tcg_out_movi(s, TCG_TYPE_I64, dest, 0);
+        }
+        tcg_out_insn(s, RRE, ALCGR, dest, dest);
+        return;
+
+    case TCG_COND_LEU:
+    case TCG_COND_LTU:
+    case TCG_COND_LT:
+        /* Swap operands so that we can use GEU/GTU/GT.  */
+        if (c2const) {
+            tcg_out_movi(s, type, TCG_TMP0, c2);
+            c2 = c1;
+            c2const = 0;
+            c1 = TCG_TMP0;
+        } else {
+            TCGReg t = c1;
+            c1 = c2;
+            c2 = t;
+        }
+        if (cond == TCG_COND_LEU) {
+            goto do_geu;
+        }
+        cond = tcg_swap_cond(cond);
+        goto do_greater;
+
+    case TCG_COND_NE:
+        /* X != 0 is X > 0.  */
+        if (c2const && c2 == 0) {
+            cond = TCG_COND_GTU;
+            goto do_greater;
+        }
+        break;
+
+    case TCG_COND_EQ:
+        /* X == 0 is X <= 0 is 0 >= X.  */
+        if (c2const && c2 == 0) {
+            tcg_out_movi(s, TCG_TYPE_I64, TCG_TMP0, 0);
+            c2 = c1;
+            c2const = 0;
+            c1 = TCG_TMP0;
+            goto do_geu;
+        }
+        break;
+
+    default:
+        break;
+    }
+
+    cc = tgen_cmp(s, type, cond, c1, c2, c2const);
+    if (facilities & FACILITY_LOAD_ON_COND) {
+        /* Emit: d = 0, t = 1, d = (cc ? t : d).  */
+        tcg_out_movi(s, TCG_TYPE_I64, dest, 0);
+        tcg_out_movi(s, TCG_TYPE_I64, TCG_TMP0, 1);
+        tcg_out_insn(s, RRF, LOCGR, dest, TCG_TMP0, cc);
+    } else {
+        /* Emit: d = 1; if (cc) goto over; d = 0; over:  */
+        tcg_out_movi(s, type, dest, 1);
+        tcg_out_insn(s, RI, BRC, cc, (4 + 4) >> 1);
+        tcg_out_movi(s, type, dest, 0);
+    }
+}
+
+static void tgen_movcond(TCGContext *s, TCGType type, TCGCond c, TCGReg dest,
+                         TCGReg c1, TCGArg c2, int c2const, TCGReg r3)
+{
+    int cc;
+    if (facilities & FACILITY_LOAD_ON_COND) {
+        cc = tgen_cmp(s, type, c, c1, c2, c2const);
+        tcg_out_insn(s, RRF, LOCGR, dest, r3, cc);
+    } else {
+        c = tcg_invert_cond(c);
+        cc = tgen_cmp(s, type, c, c1, c2, c2const);
+
+        /* Emit: if (cc) goto over; dest = r3; over:  */
+        tcg_out_insn(s, RI, BRC, cc, (4 + 4) >> 1);
+        tcg_out_insn(s, RRE, LGR, dest, r3);
+    }
+}
+
+bool tcg_target_deposit_valid(int ofs, int len)
+{
+    return (facilities & FACILITY_GEN_INST_EXT) != 0;
+}
+
+static void tgen_deposit(TCGContext *s, TCGReg dest, TCGReg src,
+                         int ofs, int len)
+{
+    int lsb = (63 - ofs);
+    int msb = lsb - (len - 1);
+    tcg_out_risbg(s, dest, src, msb, lsb, ofs, 0);
+}
+
+static void tgen_gotoi(TCGContext *s, int cc, tcg_insn_unit *dest)
+{
+    ptrdiff_t off = dest - s->code_ptr;
+    if (off == (int16_t)off) {
+        tcg_out_insn(s, RI, BRC, cc, off);
+    } else if (off == (int32_t)off) {
+        tcg_out_insn(s, RIL, BRCL, cc, off);
+    } else {
+        tcg_out_movi(s, TCG_TYPE_PTR, TCG_TMP0, (uintptr_t)dest);
+        tcg_out_insn(s, RR, BCR, cc, TCG_TMP0);
+    }
+}
+
+static void tgen_branch(TCGContext *s, int cc, TCGLabel *l)
+{
+    if (l->has_value) {
+        tgen_gotoi(s, cc, l->u.value_ptr);
+    } else if (USE_LONG_BRANCHES) {
+        tcg_out16(s, RIL_BRCL | (cc << 4));
+        tcg_out_reloc(s, s->code_ptr, R_390_PC32DBL, l, -2);
+        s->code_ptr += 2;
+    } else {
+        tcg_out16(s, RI_BRC | (cc << 4));
+        tcg_out_reloc(s, s->code_ptr, R_390_PC16DBL, l, -2);
+        s->code_ptr += 1;
+    }
+}
+
+static void tgen_compare_branch(TCGContext *s, S390Opcode opc, int cc,
+                                TCGReg r1, TCGReg r2, TCGLabel *l)
+{
+    intptr_t off;
+
+    if (l->has_value) {
+        off = l->u.value_ptr - s->code_ptr;
+    } else {
+        /* We need to keep the offset unchanged for retranslation.  */
+        off = s->code_ptr[1];
+        tcg_out_reloc(s, s->code_ptr + 1, R_390_PC16DBL, l, -2);
+    }
+
+    tcg_out16(s, (opc & 0xff00) | (r1 << 4) | r2);
+    tcg_out16(s, off);
+    tcg_out16(s, cc << 12 | (opc & 0xff));
+}
+
+static void tgen_compare_imm_branch(TCGContext *s, S390Opcode opc, int cc,
+                                    TCGReg r1, int i2, TCGLabel *l)
+{
+    tcg_target_long off;
+
+    if (l->has_value) {
+        off = l->u.value_ptr - s->code_ptr;
+    } else {
+        /* We need to keep the offset unchanged for retranslation.  */
+        off = s->code_ptr[1];
+        tcg_out_reloc(s, s->code_ptr + 1, R_390_PC16DBL, l, -2);
+    }
+
+    tcg_out16(s, (opc & 0xff00) | (r1 << 4) | cc);
+    tcg_out16(s, off);
+    tcg_out16(s, (i2 << 8) | (opc & 0xff));
+}
+
+static void tgen_brcond(TCGContext *s, TCGType type, TCGCond c,
+                        TCGReg r1, TCGArg c2, int c2const, TCGLabel *l)
+{
+    int cc;
+
+    if (facilities & FACILITY_GEN_INST_EXT) {
+        bool is_unsigned = is_unsigned_cond(c);
+        bool in_range;
+        S390Opcode opc;
+
+        cc = tcg_cond_to_s390_cond[c];
+
+        if (!c2const) {
+            opc = (type == TCG_TYPE_I32
+                   ? (is_unsigned ? RIE_CLRJ : RIE_CRJ)
+                   : (is_unsigned ? RIE_CLGRJ : RIE_CGRJ));
+            tgen_compare_branch(s, opc, cc, r1, c2, l);
+            return;
+        }
+
+        /* COMPARE IMMEDIATE AND BRANCH RELATIVE has an 8-bit immediate field.
+           If the immediate we've been given does not fit that range, we'll
+           fall back to separate compare and branch instructions using the
+           larger comparison range afforded by COMPARE IMMEDIATE.  */
+        if (type == TCG_TYPE_I32) {
+            if (is_unsigned) {
+                opc = RIE_CLIJ;
+                in_range = (uint32_t)c2 == (uint8_t)c2;
+            } else {
+                opc = RIE_CIJ;
+                in_range = (int32_t)c2 == (int8_t)c2;
+            }
+        } else {
+            if (is_unsigned) {
+                opc = RIE_CLGIJ;
+                in_range = (uint64_t)c2 == (uint8_t)c2;
+            } else {
+                opc = RIE_CGIJ;
+                in_range = (int64_t)c2 == (int8_t)c2;
+            }
+        }
+        if (in_range) {
+            tgen_compare_imm_branch(s, opc, cc, r1, c2, l);
+            return;
+        }
+    }
+
+    cc = tgen_cmp(s, type, c, r1, c2, c2const);
+    tgen_branch(s, cc, l);
+}
+
+static void tcg_out_call(TCGContext *s, tcg_insn_unit *dest)
+{
+    ptrdiff_t off = dest - s->code_ptr;
+    if (off == (int32_t)off) {
+        tcg_out_insn(s, RIL, BRASL, TCG_REG_R14, off);
+    } else {
+        tcg_out_movi(s, TCG_TYPE_PTR, TCG_TMP0, (uintptr_t)dest);
+        tcg_out_insn(s, RR, BASR, TCG_REG_R14, TCG_TMP0);
+    }
+}
+
+static void tcg_out_qemu_ld_direct(TCGContext *s, TCGMemOp opc, TCGReg data,
+                                   TCGReg base, TCGReg index, int disp)
+{
+    switch (opc & (MO_SSIZE | MO_BSWAP)) {
+    case MO_UB:
+        tcg_out_insn(s, RXY, LLGC, data, base, index, disp);
+        break;
+    case MO_SB:
+        tcg_out_insn(s, RXY, LGB, data, base, index, disp);
+        break;
+
+    case MO_UW | MO_BSWAP:
+        /* swapped unsigned halfword load with upper bits zeroed */
+        tcg_out_insn(s, RXY, LRVH, data, base, index, disp);
+        tgen_ext16u(s, TCG_TYPE_I64, data, data);
+        break;
+    case MO_UW:
+        tcg_out_insn(s, RXY, LLGH, data, base, index, disp);
+        break;
+
+    case MO_SW | MO_BSWAP:
+        /* swapped sign-extended halfword load */
+        tcg_out_insn(s, RXY, LRVH, data, base, index, disp);
+        tgen_ext16s(s, TCG_TYPE_I64, data, data);
+        break;
+    case MO_SW:
+        tcg_out_insn(s, RXY, LGH, data, base, index, disp);
+        break;
+
+    case MO_UL | MO_BSWAP:
+        /* swapped unsigned int load with upper bits zeroed */
+        tcg_out_insn(s, RXY, LRV, data, base, index, disp);
+        tgen_ext32u(s, data, data);
+        break;
+    case MO_UL:
+        tcg_out_insn(s, RXY, LLGF, data, base, index, disp);
+        break;
+
+    case MO_SL | MO_BSWAP:
+        /* swapped sign-extended int load */
+        tcg_out_insn(s, RXY, LRV, data, base, index, disp);
+        tgen_ext32s(s, data, data);
+        break;
+    case MO_SL:
+        tcg_out_insn(s, RXY, LGF, data, base, index, disp);
+        break;
+
+    case MO_Q | MO_BSWAP:
+        tcg_out_insn(s, RXY, LRVG, data, base, index, disp);
+        break;
+    case MO_Q:
+        tcg_out_insn(s, RXY, LG, data, base, index, disp);
+        break;
+
+    default:
+        tcg_abort();
+    }
+}
+
+static void tcg_out_qemu_st_direct(TCGContext *s, TCGMemOp opc, TCGReg data,
+                                   TCGReg base, TCGReg index, int disp)
+{
+    switch (opc & (MO_SIZE | MO_BSWAP)) {
+    case MO_UB:
+        if (disp >= 0 && disp < 0x1000) {
+            tcg_out_insn(s, RX, STC, data, base, index, disp);
+        } else {
+            tcg_out_insn(s, RXY, STCY, data, base, index, disp);
+        }
+        break;
+
+    case MO_UW | MO_BSWAP:
+        tcg_out_insn(s, RXY, STRVH, data, base, index, disp);
+        break;
+    case MO_UW:
+        if (disp >= 0 && disp < 0x1000) {
+            tcg_out_insn(s, RX, STH, data, base, index, disp);
+        } else {
+            tcg_out_insn(s, RXY, STHY, data, base, index, disp);
+        }
+        break;
+
+    case MO_UL | MO_BSWAP:
+        tcg_out_insn(s, RXY, STRV, data, base, index, disp);
+        break;
+    case MO_UL:
+        if (disp >= 0 && disp < 0x1000) {
+            tcg_out_insn(s, RX, ST, data, base, index, disp);
+        } else {
+            tcg_out_insn(s, RXY, STY, data, base, index, disp);
+        }
+        break;
+
+    case MO_Q | MO_BSWAP:
+        tcg_out_insn(s, RXY, STRVG, data, base, index, disp);
+        break;
+    case MO_Q:
+        tcg_out_insn(s, RXY, STG, data, base, index, disp);
+        break;
+
+    default:
+        tcg_abort();
+    }
+}
+
+#if defined(CONFIG_SOFTMMU)
+/* We're expecting to use a 20-bit signed offset on the tlb memory ops.
+   Using the offset of the second entry in the last tlb table ensures
+   that we can index all of the elements of the first entry.  */
+QEMU_BUILD_BUG_ON(offsetof(CPUArchState, tlb_table[NB_MMU_MODES - 1][1])
+                  > 0x7ffff);
+
+/* Load and compare a TLB entry, leaving the flags set.  Loads the TLB
+   addend into R2.  Returns a register with the santitized guest address.  */
+static TCGReg tcg_out_tlb_read(TCGContext* s, TCGReg addr_reg, TCGMemOp opc,
+                               int mem_index, bool is_ld)
+{
+    int s_mask = (1 << (opc & MO_SIZE)) - 1;
+    int ofs, a_off;
+    uint64_t tlb_mask;
+
+    /* For aligned accesses, we check the first byte and include the alignment
+       bits within the address.  For unaligned access, we check that we don't
+       cross pages using the address of the last byte of the access.  */
+    if ((opc & MO_AMASK) == MO_ALIGN || s_mask == 0) {
+        a_off = 0;
+        tlb_mask = TARGET_PAGE_MASK | s_mask;
+    } else {
+        a_off = s_mask;
+        tlb_mask = TARGET_PAGE_MASK;
+    }
+
+    if (facilities & FACILITY_GEN_INST_EXT) {
+        tcg_out_risbg(s, TCG_REG_R2, addr_reg,
+                      64 - CPU_TLB_BITS - CPU_TLB_ENTRY_BITS,
+                      63 - CPU_TLB_ENTRY_BITS,
+                      64 + CPU_TLB_ENTRY_BITS - TARGET_PAGE_BITS, 1);
+        if (a_off) {
+            tcg_out_insn(s, RX, LA, TCG_REG_R3, addr_reg, TCG_REG_NONE, a_off);
+            tgen_andi(s, TCG_TYPE_TL, TCG_REG_R3, tlb_mask);
+        } else {
+            tgen_andi_risbg(s, TCG_REG_R3, addr_reg, tlb_mask);
+        }
+    } else {
+        tcg_out_sh64(s, RSY_SRLG, TCG_REG_R2, addr_reg, TCG_REG_NONE,
+                     TARGET_PAGE_BITS - CPU_TLB_ENTRY_BITS);
+        tcg_out_insn(s, RX, LA, TCG_REG_R3, addr_reg, TCG_REG_NONE, a_off);
+        tgen_andi(s, TCG_TYPE_I64, TCG_REG_R2,
+                  (CPU_TLB_SIZE - 1) << CPU_TLB_ENTRY_BITS);
+        tgen_andi(s, TCG_TYPE_TL, TCG_REG_R3, tlb_mask);
+    }
+
+    if (is_ld) {
+        ofs = offsetof(CPUArchState, tlb_table[mem_index][0].addr_read);
+    } else {
+        ofs = offsetof(CPUArchState, tlb_table[mem_index][0].addr_write);
+    }
+    if (TARGET_LONG_BITS == 32) {
+        tcg_out_mem(s, RX_C, RXY_CY, TCG_REG_R3, TCG_REG_R2, TCG_AREG0, ofs);
+    } else {
+        tcg_out_mem(s, 0, RXY_CG, TCG_REG_R3, TCG_REG_R2, TCG_AREG0, ofs);
+    }
+
+    ofs = offsetof(CPUArchState, tlb_table[mem_index][0].addend);
+    tcg_out_mem(s, 0, RXY_LG, TCG_REG_R2, TCG_REG_R2, TCG_AREG0, ofs);
+
+    if (TARGET_LONG_BITS == 32) {
+        tgen_ext32u(s, TCG_REG_R3, addr_reg);
+        return TCG_REG_R3;
+    }
+    return addr_reg;
+}
+
+static void add_qemu_ldst_label(TCGContext *s, bool is_ld, TCGMemOpIdx oi,
+                                TCGReg data, TCGReg addr,
+                                tcg_insn_unit *raddr, tcg_insn_unit *label_ptr)
+{
+    TCGLabelQemuLdst *label = new_ldst_label(s);
+
+    label->is_ld = is_ld;
+    label->oi = oi;
+    label->datalo_reg = data;
+    label->addrlo_reg = addr;
+    label->raddr = raddr;
+    label->label_ptr[0] = label_ptr;
+}
+
+static void tcg_out_qemu_ld_slow_path(TCGContext *s, TCGLabelQemuLdst *lb)
+{
+    TCGReg addr_reg = lb->addrlo_reg;
+    TCGReg data_reg = lb->datalo_reg;
+    TCGMemOpIdx oi = lb->oi;
+    TCGMemOp opc = get_memop(oi);
+
+    patch_reloc(lb->label_ptr[0], R_390_PC16DBL, (intptr_t)s->code_ptr, -2);
+
+    tcg_out_mov(s, TCG_TYPE_PTR, TCG_REG_R2, TCG_AREG0);
+    if (TARGET_LONG_BITS == 64) {
+        tcg_out_mov(s, TCG_TYPE_I64, TCG_REG_R3, addr_reg);
+    }
+    tcg_out_movi(s, TCG_TYPE_I32, TCG_REG_R4, oi);
+    tcg_out_movi(s, TCG_TYPE_PTR, TCG_REG_R5, (uintptr_t)lb->raddr);
+    tcg_out_call(s, qemu_ld_helpers[opc & (MO_BSWAP | MO_SSIZE)]);
+    tcg_out_mov(s, TCG_TYPE_I64, data_reg, TCG_REG_R2);
+
+    tgen_gotoi(s, S390_CC_ALWAYS, lb->raddr);
+}
+
+static void tcg_out_qemu_st_slow_path(TCGContext *s, TCGLabelQemuLdst *lb)
+{
+    TCGReg addr_reg = lb->addrlo_reg;
+    TCGReg data_reg = lb->datalo_reg;
+    TCGMemOpIdx oi = lb->oi;
+    TCGMemOp opc = get_memop(oi);
+
+    patch_reloc(lb->label_ptr[0], R_390_PC16DBL, (intptr_t)s->code_ptr, -2);
+
+    tcg_out_mov(s, TCG_TYPE_PTR, TCG_REG_R2, TCG_AREG0);
+    if (TARGET_LONG_BITS == 64) {
+        tcg_out_mov(s, TCG_TYPE_I64, TCG_REG_R3, addr_reg);
+    }
+    switch (opc & MO_SIZE) {
+    case MO_UB:
+        tgen_ext8u(s, TCG_TYPE_I64, TCG_REG_R4, data_reg);
+        break;
+    case MO_UW:
+        tgen_ext16u(s, TCG_TYPE_I64, TCG_REG_R4, data_reg);
+        break;
+    case MO_UL:
+        tgen_ext32u(s, TCG_REG_R4, data_reg);
+        break;
+    case MO_Q:
+        tcg_out_mov(s, TCG_TYPE_I64, TCG_REG_R4, data_reg);
+        break;
+    default:
+        tcg_abort();
+    }
+    tcg_out_movi(s, TCG_TYPE_I32, TCG_REG_R5, oi);
+    tcg_out_movi(s, TCG_TYPE_PTR, TCG_REG_R6, (uintptr_t)lb->raddr);
+    tcg_out_call(s, qemu_st_helpers[opc & (MO_BSWAP | MO_SIZE)]);
+
+    tgen_gotoi(s, S390_CC_ALWAYS, lb->raddr);
+}
+#else
+static void tcg_prepare_user_ldst(TCGContext *s, TCGReg *addr_reg,
+                                  TCGReg *index_reg, tcg_target_long *disp)
+{
+    if (TARGET_LONG_BITS == 32) {
+        tgen_ext32u(s, TCG_TMP0, *addr_reg);
+        *addr_reg = TCG_TMP0;
+    }
+    if (guest_base < 0x80000) {
+        *index_reg = TCG_REG_NONE;
+        *disp = guest_base;
+    } else {
+        *index_reg = TCG_GUEST_BASE_REG;
+        *disp = 0;
+    }
+}
+#endif /* CONFIG_SOFTMMU */
+
+static void tcg_out_qemu_ld(TCGContext* s, TCGReg data_reg, TCGReg addr_reg,
+                            TCGMemOpIdx oi)
+{
+    TCGMemOp opc = get_memop(oi);
+#ifdef CONFIG_SOFTMMU
+    unsigned mem_index = get_mmuidx(oi);
+    tcg_insn_unit *label_ptr;
+    TCGReg base_reg;
+
+    base_reg = tcg_out_tlb_read(s, addr_reg, opc, mem_index, 1);
+
+    /* We need to keep the offset unchanged for retranslation.  */
+    tcg_out16(s, RI_BRC | (S390_CC_NE << 4));
+    label_ptr = s->code_ptr;
+    s->code_ptr += 1;
+
+    tcg_out_qemu_ld_direct(s, opc, data_reg, base_reg, TCG_REG_R2, 0);
+
+    add_qemu_ldst_label(s, 1, oi, data_reg, addr_reg, s->code_ptr, label_ptr);
+#else
+    TCGReg index_reg;
+    tcg_target_long disp;
+
+    tcg_prepare_user_ldst(s, &addr_reg, &index_reg, &disp);
+    tcg_out_qemu_ld_direct(s, opc, data_reg, addr_reg, index_reg, disp);
+#endif
+}
+
+static void tcg_out_qemu_st(TCGContext* s, TCGReg data_reg, TCGReg addr_reg,
+                            TCGMemOpIdx oi)
+{
+    TCGMemOp opc = get_memop(oi);
+#ifdef CONFIG_SOFTMMU
+    unsigned mem_index = get_mmuidx(oi);
+    tcg_insn_unit *label_ptr;
+    TCGReg base_reg;
+
+    base_reg = tcg_out_tlb_read(s, addr_reg, opc, mem_index, 0);
+
+    /* We need to keep the offset unchanged for retranslation.  */
+    tcg_out16(s, RI_BRC | (S390_CC_NE << 4));
+    label_ptr = s->code_ptr;
+    s->code_ptr += 1;
+
+    tcg_out_qemu_st_direct(s, opc, data_reg, base_reg, TCG_REG_R2, 0);
+
+    add_qemu_ldst_label(s, 0, oi, data_reg, addr_reg, s->code_ptr, label_ptr);
+#else
+    TCGReg index_reg;
+    tcg_target_long disp;
+
+    tcg_prepare_user_ldst(s, &addr_reg, &index_reg, &disp);
+    tcg_out_qemu_st_direct(s, opc, data_reg, addr_reg, index_reg, disp);
+#endif
+}
+
+# define OP_32_64(x) \
+        case glue(glue(INDEX_op_,x),_i32): \
+        case glue(glue(INDEX_op_,x),_i64)
+
+static inline void tcg_out_op(TCGContext *s, TCGOpcode opc,
+                const TCGArg *args, const int *const_args)
+{
+    S390Opcode op;
+    TCGArg a0, a1, a2;
+
+    switch (opc) {
+    case INDEX_op_exit_tb:
+        /* return value */
+        tcg_out_movi(s, TCG_TYPE_PTR, TCG_REG_R2, args[0]);
+        tgen_gotoi(s, S390_CC_ALWAYS, tb_ret_addr);
+        break;
+
+    case INDEX_op_goto_tb:
+        if (s->tb_jmp_offset) {
+            tcg_out16(s, RIL_BRCL | (S390_CC_ALWAYS << 4));
+            s->tb_jmp_offset[args[0]] = tcg_current_code_size(s);
+            s->code_ptr += 2;
+        } else {
+            /* load address stored at s->tb_next + args[0] */
+            tcg_out_ld_abs(s, TCG_TYPE_PTR, TCG_TMP0, s->tb_next + args[0]);
+            /* and go there */
+            tcg_out_insn(s, RR, BCR, S390_CC_ALWAYS, TCG_TMP0);
+        }
+        s->tb_next_offset[args[0]] = tcg_current_code_size(s);
+        break;
+
+    OP_32_64(ld8u):
+        /* ??? LLC (RXY format) is only present with the extended-immediate
+           facility, whereas LLGC is always present.  */
+        tcg_out_mem(s, 0, RXY_LLGC, args[0], args[1], TCG_REG_NONE, args[2]);
+        break;
+
+    OP_32_64(ld8s):
+        /* ??? LB is no smaller than LGB, so no point to using it.  */
+        tcg_out_mem(s, 0, RXY_LGB, args[0], args[1], TCG_REG_NONE, args[2]);
+        break;
+
+    OP_32_64(ld16u):
+        /* ??? LLH (RXY format) is only present with the extended-immediate
+           facility, whereas LLGH is always present.  */
+        tcg_out_mem(s, 0, RXY_LLGH, args[0], args[1], TCG_REG_NONE, args[2]);
+        break;
+
+    case INDEX_op_ld16s_i32:
+        tcg_out_mem(s, RX_LH, RXY_LHY, args[0], args[1], TCG_REG_NONE, args[2]);
+        break;
+
+    case INDEX_op_ld_i32:
+        tcg_out_ld(s, TCG_TYPE_I32, args[0], args[1], args[2]);
+        break;
+
+    OP_32_64(st8):
+        tcg_out_mem(s, RX_STC, RXY_STCY, args[0], args[1],
+                    TCG_REG_NONE, args[2]);
+        break;
+
+    OP_32_64(st16):
+        tcg_out_mem(s, RX_STH, RXY_STHY, args[0], args[1],
+                    TCG_REG_NONE, args[2]);
+        break;
+
+    case INDEX_op_st_i32:
+        tcg_out_st(s, TCG_TYPE_I32, args[0], args[1], args[2]);
+        break;
+
+    case INDEX_op_add_i32:
+        a0 = args[0], a1 = args[1], a2 = (int32_t)args[2];
+        if (const_args[2]) {
+        do_addi_32:
+            if (a0 == a1) {
+                if (a2 == (int16_t)a2) {
+                    tcg_out_insn(s, RI, AHI, a0, a2);
+                    break;
+                }
+                if (facilities & FACILITY_EXT_IMM) {
+                    tcg_out_insn(s, RIL, AFI, a0, a2);
+                    break;
+                }
+            }
+            tcg_out_mem(s, RX_LA, RXY_LAY, a0, a1, TCG_REG_NONE, a2);
+        } else if (a0 == a1) {
+            tcg_out_insn(s, RR, AR, a0, a2);
+        } else {
+            tcg_out_insn(s, RX, LA, a0, a1, a2, 0);
+        }
+        break;
+    case INDEX_op_sub_i32:
+        a0 = args[0], a1 = args[1], a2 = (int32_t)args[2];
+        if (const_args[2]) {
+            a2 = -a2;
+            goto do_addi_32;
+        }
+        tcg_out_insn(s, RR, SR, args[0], args[2]);
+        break;
+
+    case INDEX_op_and_i32:
+        if (const_args[2]) {
+            tgen_andi(s, TCG_TYPE_I32, args[0], args[2]);
+        } else {
+            tcg_out_insn(s, RR, NR, args[0], args[2]);
+        }
+        break;
+    case INDEX_op_or_i32:
+        if (const_args[2]) {
+            tgen64_ori(s, args[0], args[2] & 0xffffffff);
+        } else {
+            tcg_out_insn(s, RR, OR, args[0], args[2]);
+        }
+        break;
+    case INDEX_op_xor_i32:
+        if (const_args[2]) {
+            tgen64_xori(s, args[0], args[2] & 0xffffffff);
+        } else {
+            tcg_out_insn(s, RR, XR, args[0], args[2]);
+        }
+        break;
+
+    case INDEX_op_neg_i32:
+        tcg_out_insn(s, RR, LCR, args[0], args[1]);
+        break;
+
+    case INDEX_op_mul_i32:
+        if (const_args[2]) {
+            if ((int32_t)args[2] == (int16_t)args[2]) {
+                tcg_out_insn(s, RI, MHI, args[0], args[2]);
+            } else {
+                tcg_out_insn(s, RIL, MSFI, args[0], args[2]);
+            }
+        } else {
+            tcg_out_insn(s, RRE, MSR, args[0], args[2]);
+        }
+        break;
+
+    case INDEX_op_div2_i32:
+        tcg_out_insn(s, RR, DR, TCG_REG_R2, args[4]);
+        break;
+    case INDEX_op_divu2_i32:
+        tcg_out_insn(s, RRE, DLR, TCG_REG_R2, args[4]);
+        break;
+
+    case INDEX_op_shl_i32:
+        op = RS_SLL;
+    do_shift32:
+        if (const_args[2]) {
+            tcg_out_sh32(s, op, args[0], TCG_REG_NONE, args[2]);
+        } else {
+            tcg_out_sh32(s, op, args[0], args[2], 0);
+        }
+        break;
+    case INDEX_op_shr_i32:
+        op = RS_SRL;
+        goto do_shift32;
+    case INDEX_op_sar_i32:
+        op = RS_SRA;
+        goto do_shift32;
+
+    case INDEX_op_rotl_i32:
+        /* ??? Using tcg_out_sh64 here for the format; it is a 32-bit rol.  */
+        if (const_args[2]) {
+            tcg_out_sh64(s, RSY_RLL, args[0], args[1], TCG_REG_NONE, args[2]);
+        } else {
+            tcg_out_sh64(s, RSY_RLL, args[0], args[1], args[2], 0);
+        }
+        break;
+    case INDEX_op_rotr_i32:
+        if (const_args[2]) {
+            tcg_out_sh64(s, RSY_RLL, args[0], args[1],
+                         TCG_REG_NONE, (32 - args[2]) & 31);
+        } else {
+            tcg_out_insn(s, RR, LCR, TCG_TMP0, args[2]);
+            tcg_out_sh64(s, RSY_RLL, args[0], args[1], TCG_TMP0, 0);
+        }
+        break;
+
+    case INDEX_op_ext8s_i32:
+        tgen_ext8s(s, TCG_TYPE_I32, args[0], args[1]);
+        break;
+    case INDEX_op_ext16s_i32:
+        tgen_ext16s(s, TCG_TYPE_I32, args[0], args[1]);
+        break;
+    case INDEX_op_ext8u_i32:
+        tgen_ext8u(s, TCG_TYPE_I32, args[0], args[1]);
+        break;
+    case INDEX_op_ext16u_i32:
+        tgen_ext16u(s, TCG_TYPE_I32, args[0], args[1]);
+        break;
+
+    OP_32_64(bswap16):
+        /* The TCG bswap definition requires bits 0-47 already be zero.
+           Thus we don't need the G-type insns to implement bswap16_i64.  */
+        tcg_out_insn(s, RRE, LRVR, args[0], args[1]);
+        tcg_out_sh32(s, RS_SRL, args[0], TCG_REG_NONE, 16);
+        break;
+    OP_32_64(bswap32):
+        tcg_out_insn(s, RRE, LRVR, args[0], args[1]);
+        break;
+
+    case INDEX_op_add2_i32:
+        if (const_args[4]) {
+            tcg_out_insn(s, RIL, ALFI, args[0], args[4]);
+        } else {
+            tcg_out_insn(s, RR, ALR, args[0], args[4]);
+        }
+        tcg_out_insn(s, RRE, ALCR, args[1], args[5]);
+        break;
+    case INDEX_op_sub2_i32:
+        if (const_args[4]) {
+            tcg_out_insn(s, RIL, SLFI, args[0], args[4]);
+        } else {
+            tcg_out_insn(s, RR, SLR, args[0], args[4]);
+        }
+        tcg_out_insn(s, RRE, SLBR, args[1], args[5]);
+        break;
+
+    case INDEX_op_br:
+        tgen_branch(s, S390_CC_ALWAYS, arg_label(args[0]));
+        break;
+
+    case INDEX_op_brcond_i32:
+        tgen_brcond(s, TCG_TYPE_I32, args[2], args[0],
+                    args[1], const_args[1], arg_label(args[3]));
+        break;
+    case INDEX_op_setcond_i32:
+        tgen_setcond(s, TCG_TYPE_I32, args[3], args[0], args[1],
+                     args[2], const_args[2]);
+        break;
+    case INDEX_op_movcond_i32:
+        tgen_movcond(s, TCG_TYPE_I32, args[5], args[0], args[1],
+                     args[2], const_args[2], args[3]);
+        break;
+
+    case INDEX_op_qemu_ld_i32:
+        /* ??? Technically we can use a non-extending instruction.  */
+    case INDEX_op_qemu_ld_i64:
+        tcg_out_qemu_ld(s, args[0], args[1], args[2]);
+        break;
+    case INDEX_op_qemu_st_i32:
+    case INDEX_op_qemu_st_i64:
+        tcg_out_qemu_st(s, args[0], args[1], args[2]);
+        break;
+
+    case INDEX_op_ld16s_i64:
+        tcg_out_mem(s, 0, RXY_LGH, args[0], args[1], TCG_REG_NONE, args[2]);
+        break;
+    case INDEX_op_ld32u_i64:
+        tcg_out_mem(s, 0, RXY_LLGF, args[0], args[1], TCG_REG_NONE, args[2]);
+        break;
+    case INDEX_op_ld32s_i64:
+        tcg_out_mem(s, 0, RXY_LGF, args[0], args[1], TCG_REG_NONE, args[2]);
+        break;
+    case INDEX_op_ld_i64:
+        tcg_out_ld(s, TCG_TYPE_I64, args[0], args[1], args[2]);
+        break;
+
+    case INDEX_op_st32_i64:
+        tcg_out_st(s, TCG_TYPE_I32, args[0], args[1], args[2]);
+        break;
+    case INDEX_op_st_i64:
+        tcg_out_st(s, TCG_TYPE_I64, args[0], args[1], args[2]);
+        break;
+
+    case INDEX_op_add_i64:
+        a0 = args[0], a1 = args[1], a2 = args[2];
+        if (const_args[2]) {
+        do_addi_64:
+            if (a0 == a1) {
+                if (a2 == (int16_t)a2) {
+                    tcg_out_insn(s, RI, AGHI, a0, a2);
+                    break;
+                }
+                if (facilities & FACILITY_EXT_IMM) {
+                    if (a2 == (int32_t)a2) {
+                        tcg_out_insn(s, RIL, AGFI, a0, a2);
+                        break;
+                    } else if (a2 == (uint32_t)a2) {
+                        tcg_out_insn(s, RIL, ALGFI, a0, a2);
+                        break;
+                    } else if (-a2 == (uint32_t)-a2) {
+                        tcg_out_insn(s, RIL, SLGFI, a0, -a2);
+                        break;
+                    }
+                }
+            }
+            tcg_out_mem(s, RX_LA, RXY_LAY, a0, a1, TCG_REG_NONE, a2);
+        } else if (a0 == a1) {
+            tcg_out_insn(s, RRE, AGR, a0, a2);
+        } else {
+            tcg_out_insn(s, RX, LA, a0, a1, a2, 0);
+        }
+        break;
+    case INDEX_op_sub_i64:
+        a0 = args[0], a1 = args[1], a2 = args[2];
+        if (const_args[2]) {
+            a2 = -a2;
+            goto do_addi_64;
+        } else {
+            tcg_out_insn(s, RRE, SGR, args[0], args[2]);
+        }
+        break;
+
+    case INDEX_op_and_i64:
+        if (const_args[2]) {
+            tgen_andi(s, TCG_TYPE_I64, args[0], args[2]);
+        } else {
+            tcg_out_insn(s, RRE, NGR, args[0], args[2]);
+        }
+        break;
+    case INDEX_op_or_i64:
+        if (const_args[2]) {
+            tgen64_ori(s, args[0], args[2]);
+        } else {
+            tcg_out_insn(s, RRE, OGR, args[0], args[2]);
+        }
+        break;
+    case INDEX_op_xor_i64:
+        if (const_args[2]) {
+            tgen64_xori(s, args[0], args[2]);
+        } else {
+            tcg_out_insn(s, RRE, XGR, args[0], args[2]);
+        }
+        break;
+
+    case INDEX_op_neg_i64:
+        tcg_out_insn(s, RRE, LCGR, args[0], args[1]);
+        break;
+    case INDEX_op_bswap64_i64:
+        tcg_out_insn(s, RRE, LRVGR, args[0], args[1]);
+        break;
+
+    case INDEX_op_mul_i64:
+        if (const_args[2]) {
+            if (args[2] == (int16_t)args[2]) {
+                tcg_out_insn(s, RI, MGHI, args[0], args[2]);
+            } else {
+                tcg_out_insn(s, RIL, MSGFI, args[0], args[2]);
+            }
+        } else {
+            tcg_out_insn(s, RRE, MSGR, args[0], args[2]);
+        }
+        break;
+
+    case INDEX_op_div2_i64:
+        /* ??? We get an unnecessary sign-extension of the dividend
+           into R3 with this definition, but as we do in fact always
+           produce both quotient and remainder using INDEX_op_div_i64
+           instead requires jumping through even more hoops.  */
+        tcg_out_insn(s, RRE, DSGR, TCG_REG_R2, args[4]);
+        break;
+    case INDEX_op_divu2_i64:
+        tcg_out_insn(s, RRE, DLGR, TCG_REG_R2, args[4]);
+        break;
+    case INDEX_op_mulu2_i64:
+        tcg_out_insn(s, RRE, MLGR, TCG_REG_R2, args[3]);
+        break;
+
+    case INDEX_op_shl_i64:
+        op = RSY_SLLG;
+    do_shift64:
+        if (const_args[2]) {
+            tcg_out_sh64(s, op, args[0], args[1], TCG_REG_NONE, args[2]);
+        } else {
+            tcg_out_sh64(s, op, args[0], args[1], args[2], 0);
+        }
+        break;
+    case INDEX_op_shr_i64:
+        op = RSY_SRLG;
+        goto do_shift64;
+    case INDEX_op_sar_i64:
+        op = RSY_SRAG;
+        goto do_shift64;
+
+    case INDEX_op_rotl_i64:
+        if (const_args[2]) {
+            tcg_out_sh64(s, RSY_RLLG, args[0], args[1],
+                         TCG_REG_NONE, args[2]);
+        } else {
+            tcg_out_sh64(s, RSY_RLLG, args[0], args[1], args[2], 0);
+        }
+        break;
+    case INDEX_op_rotr_i64:
+        if (const_args[2]) {
+            tcg_out_sh64(s, RSY_RLLG, args[0], args[1],
+                         TCG_REG_NONE, (64 - args[2]) & 63);
+        } else {
+            /* We can use the smaller 32-bit negate because only the
+               low 6 bits are examined for the rotate.  */
+            tcg_out_insn(s, RR, LCR, TCG_TMP0, args[2]);
+            tcg_out_sh64(s, RSY_RLLG, args[0], args[1], TCG_TMP0, 0);
+        }
+        break;
+
+    case INDEX_op_ext8s_i64:
+        tgen_ext8s(s, TCG_TYPE_I64, args[0], args[1]);
+        break;
+    case INDEX_op_ext16s_i64:
+        tgen_ext16s(s, TCG_TYPE_I64, args[0], args[1]);
+        break;
+    case INDEX_op_ext_i32_i64:
+    case INDEX_op_ext32s_i64:
+        tgen_ext32s(s, args[0], args[1]);
+        break;
+    case INDEX_op_ext8u_i64:
+        tgen_ext8u(s, TCG_TYPE_I64, args[0], args[1]);
+        break;
+    case INDEX_op_ext16u_i64:
+        tgen_ext16u(s, TCG_TYPE_I64, args[0], args[1]);
+        break;
+    case INDEX_op_extu_i32_i64:
+    case INDEX_op_ext32u_i64:
+        tgen_ext32u(s, args[0], args[1]);
+        break;
+
+    case INDEX_op_add2_i64:
+        if (const_args[4]) {
+            if ((int64_t)args[4] >= 0) {
+                tcg_out_insn(s, RIL, ALGFI, args[0], args[4]);
+            } else {
+                tcg_out_insn(s, RIL, SLGFI, args[0], -args[4]);
+            }
+        } else {
+            tcg_out_insn(s, RRE, ALGR, args[0], args[4]);
+        }
+        tcg_out_insn(s, RRE, ALCGR, args[1], args[5]);
+        break;
+    case INDEX_op_sub2_i64:
+        if (const_args[4]) {
+            if ((int64_t)args[4] >= 0) {
+                tcg_out_insn(s, RIL, SLGFI, args[0], args[4]);
+            } else {
+                tcg_out_insn(s, RIL, ALGFI, args[0], -args[4]);
+            }
+        } else {
+            tcg_out_insn(s, RRE, SLGR, args[0], args[4]);
+        }
+        tcg_out_insn(s, RRE, SLBGR, args[1], args[5]);
+        break;
+
+    case INDEX_op_brcond_i64:
+        tgen_brcond(s, TCG_TYPE_I64, args[2], args[0],
+                    args[1], const_args[1], arg_label(args[3]));
+        break;
+    case INDEX_op_setcond_i64:
+        tgen_setcond(s, TCG_TYPE_I64, args[3], args[0], args[1],
+                     args[2], const_args[2]);
+        break;
+    case INDEX_op_movcond_i64:
+        tgen_movcond(s, TCG_TYPE_I64, args[5], args[0], args[1],
+                     args[2], const_args[2], args[3]);
+        break;
+
+    OP_32_64(deposit):
+        tgen_deposit(s, args[0], args[2], args[3], args[4]);
+        break;
+
+    case INDEX_op_mov_i32:  /* Always emitted via tcg_out_mov.  */
+    case INDEX_op_mov_i64:
+    case INDEX_op_movi_i32: /* Always emitted via tcg_out_movi.  */
+    case INDEX_op_movi_i64:
+    case INDEX_op_call:     /* Always emitted via tcg_out_call.  */
+    default:
+        tcg_abort();
+    }
+}
+
+static const TCGTargetOpDef s390_op_defs[] = {
+    { INDEX_op_exit_tb, { } },
+    { INDEX_op_goto_tb, { } },
+    { INDEX_op_br, { } },
+
+    { INDEX_op_ld8u_i32, { "r", "r" } },
+    { INDEX_op_ld8s_i32, { "r", "r" } },
+    { INDEX_op_ld16u_i32, { "r", "r" } },
+    { INDEX_op_ld16s_i32, { "r", "r" } },
+    { INDEX_op_ld_i32, { "r", "r" } },
+    { INDEX_op_st8_i32, { "r", "r" } },
+    { INDEX_op_st16_i32, { "r", "r" } },
+    { INDEX_op_st_i32, { "r", "r" } },
+
+    { INDEX_op_add_i32, { "r", "r", "ri" } },
+    { INDEX_op_sub_i32, { "r", "0", "ri" } },
+    { INDEX_op_mul_i32, { "r", "0", "rK" } },
+
+    { INDEX_op_div2_i32, { "b", "a", "0", "1", "r" } },
+    { INDEX_op_divu2_i32, { "b", "a", "0", "1", "r" } },
+
+    { INDEX_op_and_i32, { "r", "0", "ri" } },
+    { INDEX_op_or_i32, { "r", "0", "rO" } },
+    { INDEX_op_xor_i32, { "r", "0", "rX" } },
+
+    { INDEX_op_neg_i32, { "r", "r" } },
+
+    { INDEX_op_shl_i32, { "r", "0", "Ri" } },
+    { INDEX_op_shr_i32, { "r", "0", "Ri" } },
+    { INDEX_op_sar_i32, { "r", "0", "Ri" } },
+
+    { INDEX_op_rotl_i32, { "r", "r", "Ri" } },
+    { INDEX_op_rotr_i32, { "r", "r", "Ri" } },
+
+    { INDEX_op_ext8s_i32, { "r", "r" } },
+    { INDEX_op_ext8u_i32, { "r", "r" } },
+    { INDEX_op_ext16s_i32, { "r", "r" } },
+    { INDEX_op_ext16u_i32, { "r", "r" } },
+
+    { INDEX_op_bswap16_i32, { "r", "r" } },
+    { INDEX_op_bswap32_i32, { "r", "r" } },
+
+    { INDEX_op_add2_i32, { "r", "r", "0", "1", "rA", "r" } },
+    { INDEX_op_sub2_i32, { "r", "r", "0", "1", "rA", "r" } },
+
+    { INDEX_op_brcond_i32, { "r", "rC" } },
+    { INDEX_op_setcond_i32, { "r", "r", "rC" } },
+    { INDEX_op_movcond_i32, { "r", "r", "rC", "r", "0" } },
+    { INDEX_op_deposit_i32, { "r", "0", "r" } },
+
+    { INDEX_op_qemu_ld_i32, { "r", "L" } },
+    { INDEX_op_qemu_ld_i64, { "r", "L" } },
+    { INDEX_op_qemu_st_i32, { "L", "L" } },
+    { INDEX_op_qemu_st_i64, { "L", "L" } },
+
+    { INDEX_op_ld8u_i64, { "r", "r" } },
+    { INDEX_op_ld8s_i64, { "r", "r" } },
+    { INDEX_op_ld16u_i64, { "r", "r" } },
+    { INDEX_op_ld16s_i64, { "r", "r" } },
+    { INDEX_op_ld32u_i64, { "r", "r" } },
+    { INDEX_op_ld32s_i64, { "r", "r" } },
+    { INDEX_op_ld_i64, { "r", "r" } },
+
+    { INDEX_op_st8_i64, { "r", "r" } },
+    { INDEX_op_st16_i64, { "r", "r" } },
+    { INDEX_op_st32_i64, { "r", "r" } },
+    { INDEX_op_st_i64, { "r", "r" } },
+
+    { INDEX_op_add_i64, { "r", "r", "ri" } },
+    { INDEX_op_sub_i64, { "r", "0", "ri" } },
+    { INDEX_op_mul_i64, { "r", "0", "rK" } },
+
+    { INDEX_op_div2_i64, { "b", "a", "0", "1", "r" } },
+    { INDEX_op_divu2_i64, { "b", "a", "0", "1", "r" } },
+    { INDEX_op_mulu2_i64, { "b", "a", "0", "r" } },
+
+    { INDEX_op_and_i64, { "r", "0", "ri" } },
+    { INDEX_op_or_i64, { "r", "0", "rO" } },
+    { INDEX_op_xor_i64, { "r", "0", "rX" } },
+
+    { INDEX_op_neg_i64, { "r", "r" } },
+
+    { INDEX_op_shl_i64, { "r", "r", "Ri" } },
+    { INDEX_op_shr_i64, { "r", "r", "Ri" } },
+    { INDEX_op_sar_i64, { "r", "r", "Ri" } },
+
+    { INDEX_op_rotl_i64, { "r", "r", "Ri" } },
+    { INDEX_op_rotr_i64, { "r", "r", "Ri" } },
+
+    { INDEX_op_ext8s_i64, { "r", "r" } },
+    { INDEX_op_ext8u_i64, { "r", "r" } },
+    { INDEX_op_ext16s_i64, { "r", "r" } },
+    { INDEX_op_ext16u_i64, { "r", "r" } },
+    { INDEX_op_ext32s_i64, { "r", "r" } },
+    { INDEX_op_ext32u_i64, { "r", "r" } },
+
+    { INDEX_op_ext_i32_i64, { "r", "r" } },
+    { INDEX_op_extu_i32_i64, { "r", "r" } },
+
+    { INDEX_op_bswap16_i64, { "r", "r" } },
+    { INDEX_op_bswap32_i64, { "r", "r" } },
+    { INDEX_op_bswap64_i64, { "r", "r" } },
+
+    { INDEX_op_add2_i64, { "r", "r", "0", "1", "rA", "r" } },
+    { INDEX_op_sub2_i64, { "r", "r", "0", "1", "rA", "r" } },
+
+    { INDEX_op_brcond_i64, { "r", "rC" } },
+    { INDEX_op_setcond_i64, { "r", "r", "rC" } },
+    { INDEX_op_movcond_i64, { "r", "r", "rC", "r", "0" } },
+    { INDEX_op_deposit_i64, { "r", "0", "r" } },
+
+    { -1 },
+};
+
+static void query_facilities(void)
+{
+    unsigned long hwcap = qemu_getauxval(AT_HWCAP);
+
+    /* Is STORE FACILITY LIST EXTENDED available?  Honestly, I believe this
+       is present on all 64-bit systems, but let's check for it anyway.  */
+    if (hwcap & HWCAP_S390_STFLE) {
+        register int r0 __asm__("0");
+        register void *r1 __asm__("1");
+
+        /* stfle 0(%r1) */
+        r1 = &facilities;
+        asm volatile(".word 0xb2b0,0x1000"
+                     : "=r"(r0) : "0"(0), "r"(r1) : "memory", "cc");
+    }
+}
+
+static void tcg_target_init(TCGContext *s)
+{
+    query_facilities();
+
+    tcg_regset_set32(tcg_target_available_regs[TCG_TYPE_I32], 0, 0xffff);
+    tcg_regset_set32(tcg_target_available_regs[TCG_TYPE_I64], 0, 0xffff);
+
+    tcg_regset_clear(tcg_target_call_clobber_regs);
+    tcg_regset_set_reg(tcg_target_call_clobber_regs, TCG_REG_R0);
+    tcg_regset_set_reg(tcg_target_call_clobber_regs, TCG_REG_R1);
+    tcg_regset_set_reg(tcg_target_call_clobber_regs, TCG_REG_R2);
+    tcg_regset_set_reg(tcg_target_call_clobber_regs, TCG_REG_R3);
+    tcg_regset_set_reg(tcg_target_call_clobber_regs, TCG_REG_R4);
+    tcg_regset_set_reg(tcg_target_call_clobber_regs, TCG_REG_R5);
+    /* The r6 register is technically call-saved, but it's also a parameter
+       register, so it can get killed by setup for the qemu_st helper.  */
+    tcg_regset_set_reg(tcg_target_call_clobber_regs, TCG_REG_R6);
+    /* The return register can be considered call-clobbered.  */
+    tcg_regset_set_reg(tcg_target_call_clobber_regs, TCG_REG_R14);
+
+    tcg_regset_clear(s->reserved_regs);
+    tcg_regset_set_reg(s->reserved_regs, TCG_TMP0);
+    /* XXX many insns can't be used with R0, so we better avoid it for now */
+    tcg_regset_set_reg(s->reserved_regs, TCG_REG_R0);
+    tcg_regset_set_reg(s->reserved_regs, TCG_REG_CALL_STACK);
+
+    tcg_add_target_add_op_defs(s390_op_defs);
+}
+
+#define FRAME_SIZE  ((int)(TCG_TARGET_CALL_STACK_OFFSET          \
+                           + TCG_STATIC_CALL_ARGS_SIZE           \
+                           + CPU_TEMP_BUF_NLONGS * sizeof(long)))
+
+static void tcg_target_qemu_prologue(TCGContext *s)
+{
+    /* stmg %r6,%r15,48(%r15) (save registers) */
+    tcg_out_insn(s, RXY, STMG, TCG_REG_R6, TCG_REG_R15, TCG_REG_R15, 48);
+
+    /* aghi %r15,-frame_size */
+    tcg_out_insn(s, RI, AGHI, TCG_REG_R15, -FRAME_SIZE);
+
+    tcg_set_frame(s, TCG_REG_CALL_STACK,
+                  TCG_STATIC_CALL_ARGS_SIZE + TCG_TARGET_CALL_STACK_OFFSET,
+                  CPU_TEMP_BUF_NLONGS * sizeof(long));
+
+#ifndef CONFIG_SOFTMMU
+    if (guest_base >= 0x80000) {
+        tcg_out_movi(s, TCG_TYPE_PTR, TCG_GUEST_BASE_REG, guest_base);
+        tcg_regset_set_reg(s->reserved_regs, TCG_GUEST_BASE_REG);
+    }
+#endif
+
+    tcg_out_mov(s, TCG_TYPE_PTR, TCG_AREG0, tcg_target_call_iarg_regs[0]);
+    /* br %r3 (go to TB) */
+    tcg_out_insn(s, RR, BCR, S390_CC_ALWAYS, tcg_target_call_iarg_regs[1]);
+
+    tb_ret_addr = s->code_ptr;
+
+    /* lmg %r6,%r15,fs+48(%r15) (restore registers) */
+    tcg_out_insn(s, RXY, LMG, TCG_REG_R6, TCG_REG_R15, TCG_REG_R15,
+                 FRAME_SIZE + 48);
+
+    /* br %r14 (return) */
+    tcg_out_insn(s, RR, BCR, S390_CC_ALWAYS, TCG_REG_R14);
+}
+
+typedef struct {
+    DebugFrameHeader h;
+    uint8_t fde_def_cfa[4];
+    uint8_t fde_reg_ofs[18];
+} DebugFrame;
+
+/* We're expecting a 2 byte uleb128 encoded value.  */
+QEMU_BUILD_BUG_ON(FRAME_SIZE >= (1 << 14));
+
+#define ELF_HOST_MACHINE  EM_S390
+
+static const DebugFrame debug_frame = {
+    .h.cie.len = sizeof(DebugFrameCIE)-4, /* length after .len member */
+    .h.cie.id = -1,
+    .h.cie.version = 1,
+    .h.cie.code_align = 1,
+    .h.cie.data_align = 8,                /* sleb128 8 */
+    .h.cie.return_column = TCG_REG_R14,
+
+    /* Total FDE size does not include the "len" member.  */
+    .h.fde.len = sizeof(DebugFrame) - offsetof(DebugFrame, h.fde.cie_offset),
+
+    .fde_def_cfa = {
+        12, TCG_REG_CALL_STACK,         /* DW_CFA_def_cfa %r15, ... */
+        (FRAME_SIZE & 0x7f) | 0x80,     /* ... uleb128 FRAME_SIZE */
+        (FRAME_SIZE >> 7)
+    },
+    .fde_reg_ofs = {
+        0x86, 6,                        /* DW_CFA_offset, %r6, 48 */
+        0x87, 7,                        /* DW_CFA_offset, %r7, 56 */
+        0x88, 8,                        /* DW_CFA_offset, %r8, 64 */
+        0x89, 9,                        /* DW_CFA_offset, %r92, 72 */
+        0x8a, 10,                       /* DW_CFA_offset, %r10, 80 */
+        0x8b, 11,                       /* DW_CFA_offset, %r11, 88 */
+        0x8c, 12,                       /* DW_CFA_offset, %r12, 96 */
+        0x8d, 13,                       /* DW_CFA_offset, %r13, 104 */
+        0x8e, 14,                       /* DW_CFA_offset, %r14, 112 */
+    }
+};
+
+void tcg_register_jit(void *buf, size_t buf_size)
+{
+    tcg_register_jit_int(buf, buf_size, &debug_frame, sizeof(debug_frame));
+}