ARM host support for TCG targets.

Updated from previous version to use the tcg prologue/epilogue mechanism, may be slower than direct call.


git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@4500 c046a42c-6fe2-441c-8c8c-71466251a162

3 files changed, 1622 insertions, 1 deletions

diff --git a/tcg/README b/tcg/README
index c879142141..9764c03ff3 100644
--- a/tcg/README
+++ b/tcg/README
@@ -75,7 +75,7 @@ depending on their declarations).
 * Helpers:
 
 Using the tcg_gen_helper_x_y it is possible to call any function
-taking i32, i64 or pointer types types. Before calling an helper, all
+taking i32, i64 or pointer types. Before calling an helper, all
 globals are stored at their canonical location and it is assumed that
 the function can modify them. In the future, function modifiers will
 be allowed to tell that the helper does not read or write some globals.
diff --git a/tcg/arm/tcg-target.c b/tcg/arm/tcg-target.c
new file mode 100644
index 0000000000..2ee4c1f34b
--- /dev/null
+++ b/tcg/arm/tcg-target.c
@@ -0,0 +1,1548 @@
+/*
+ * Tiny Code Generator for QEMU
+ *
+ * Copyright (c) 2008 Andrzej Zaborowski
+ *
+ * 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.
+ */
+const char *tcg_target_reg_names[TCG_TARGET_NB_REGS] = {
+    "%r0",
+    "%r1",
+    "%r2",
+    "%r3",
+    "%r4",
+    "%r5",
+    "%r6",
+    "%r7",
+    "%r8",
+    "%r9",
+    "%r10",
+    "%r11",
+    "%r12",
+    "%r13",
+    "%r14",
+};
+
+int tcg_target_reg_alloc_order[] = {
+    TCG_REG_R0,
+    TCG_REG_R1,
+    TCG_REG_R2,
+    TCG_REG_R3,
+    TCG_REG_R4,
+    TCG_REG_R5,
+    TCG_REG_R6,
+    TCG_REG_R7,
+    TCG_REG_R8,
+    TCG_REG_R9,
+    TCG_REG_R10,
+    TCG_REG_R11,
+    TCG_REG_R12,
+    TCG_REG_R13,
+    TCG_REG_R14,
+};
+
+const int tcg_target_call_iarg_regs[4] = {
+    TCG_REG_R0, TCG_REG_R1, TCG_REG_R2, TCG_REG_R3
+};
+const int tcg_target_call_oarg_regs[2] = {
+    TCG_REG_R0, TCG_REG_R1
+};
+
+static void patch_reloc(uint8_t *code_ptr, int type, 
+                tcg_target_long value, tcg_target_long addend)
+{
+    switch (type) {
+    case R_ARM_ABS32:
+        *(uint32_t *) code_ptr = value;
+        break;
+
+    case R_ARM_CALL:
+    case R_ARM_JUMP24:
+    default:
+        tcg_abort();
+
+    case R_ARM_PC24:
+        *(uint32_t *) code_ptr |=
+                ((value - ((tcg_target_long) code_ptr + 8)) >> 2) & 0xffffff;
+        break;
+    }
+}
+
+/* maximum number of register used for input function arguments */
+static inline int tcg_target_get_call_iarg_regs_count(int flags)
+{
+    return 4;
+}
+
+#define USE_TLB
+
+/* parse target specific constraints */
+int target_parse_constraint(TCGArgConstraint *ct, const char **pct_str)
+{
+    const char *ct_str;
+
+    ct_str = *pct_str;
+    switch (ct_str[0]) {
+    case 'r':
+#ifndef CONFIG_SOFTMMU
+    case 'd':
+    case 'D':
+    case 'x':
+    case 'X':
+#endif
+        ct->ct |= TCG_CT_REG;
+        tcg_regset_set32(ct->u.regs, 0, (1 << TCG_TARGET_NB_REGS) - 1);
+        break;
+
+#ifdef CONFIG_SOFTMMU
+    /* qemu_ld/st inputs (unless 'd', 'D' or 'X') */
+    case 'x':
+        ct->ct |= TCG_CT_REG;
+        tcg_regset_set32(ct->u.regs, 0, (1 << TCG_TARGET_NB_REGS) - 1);
+# ifdef USE_TLB
+        tcg_regset_reset_reg(ct->u.regs, TCG_REG_R0);
+        tcg_regset_reset_reg(ct->u.regs, TCG_REG_R1);
+# endif
+        break;
+
+    /* qemu_ld/st data_reg */
+    case 'd':
+        ct->ct |= TCG_CT_REG;
+        tcg_regset_set32(ct->u.regs, 0, (1 << TCG_TARGET_NB_REGS) - 1);
+        /* r0 and optionally r1 will be overwritten by the address
+         * so don't use these.  */
+        tcg_regset_reset_reg(ct->u.regs, TCG_REG_R0);
+# if TARGET_LONG_BITS == 64 || defined(USE_TLB)
+        tcg_regset_reset_reg(ct->u.regs, TCG_REG_R1);
+# endif
+        break;
+
+    /* qemu_ld/st64 data_reg2 */
+    case 'D':
+        ct->ct |= TCG_CT_REG;
+        tcg_regset_set32(ct->u.regs, 0, (1 << TCG_TARGET_NB_REGS) - 1);
+        /* r0, r1 and optionally r2 will be overwritten by the address
+         * and the low word of data, so don't use these.  */
+        tcg_regset_reset_reg(ct->u.regs, TCG_REG_R0);
+        tcg_regset_reset_reg(ct->u.regs, TCG_REG_R1);
+# if TARGET_LONG_BITS == 64
+        tcg_regset_reset_reg(ct->u.regs, TCG_REG_R2);
+# endif
+        break;
+
+# if TARGET_LONG_BITS == 64
+    /* qemu_ld/st addr_reg2 */
+    case 'X':
+        ct->ct |= TCG_CT_REG;
+        tcg_regset_set32(ct->u.regs, 0, (1 << TCG_TARGET_NB_REGS) - 1);
+        /* r0 will be overwritten by the low word of base, so don't use it.  */
+        tcg_regset_reset_reg(ct->u.regs, TCG_REG_R0);
+#  ifdef USE_TLB
+        tcg_regset_reset_reg(ct->u.regs, TCG_REG_R1);
+#  endif
+        break;
+# endif
+#endif
+
+    case '1':
+        ct->ct |= TCG_CT_REG;
+        tcg_regset_set32(ct->u.regs, 0, (1 << TCG_TARGET_NB_REGS) - 1);
+        tcg_regset_reset_reg(ct->u.regs, TCG_REG_R0);
+        break;
+
+    case '2':
+        ct->ct |= TCG_CT_REG;
+        tcg_regset_set32(ct->u.regs, 0, (1 << TCG_TARGET_NB_REGS) - 1);
+        tcg_regset_reset_reg(ct->u.regs, TCG_REG_R0);
+        tcg_regset_reset_reg(ct->u.regs, TCG_REG_R1);
+        break;
+
+    default:
+        return -1;
+    }
+    ct_str++;
+    *pct_str = ct_str;
+
+    return 0;
+}
+
+/* Test if a constant matches the constraint.
+ * TODO: define constraints for:
+ *
+ * ldr/str offset:   between -0xfff and 0xfff
+ * ldrh/strh offset: between -0xff and 0xff
+ * mov operand2:     values represented with x << (2 * y), x < 0x100
+ * add, sub, eor...: ditto
+ */
+static inline int tcg_target_const_match(tcg_target_long val,
+                const TCGArgConstraint *arg_ct)
+{
+    int ct;
+    ct = arg_ct->ct;
+    if (ct & TCG_CT_CONST)
+        return 1;
+    else
+        return 0;
+}
+
+enum arm_data_opc_e {
+    ARITH_AND = 0x0,
+    ARITH_EOR = 0x1,
+    ARITH_SUB = 0x2,
+    ARITH_RSB = 0x3,
+    ARITH_ADD = 0x4,
+    ARITH_ADC = 0x5,
+    ARITH_SBC = 0x6,
+    ARITH_RSC = 0x7,
+    ARITH_CMP = 0xa,
+    ARITH_CMN = 0xb,
+    ARITH_ORR = 0xc,
+    ARITH_MOV = 0xd,
+    ARITH_BIC = 0xe,
+    ARITH_MVN = 0xf,
+};
+
+#define TO_CPSR(opc)		((opc == ARITH_CMP || opc == ARITH_CMN) << 20)
+
+#define SHIFT_IMM_LSL(im)	(((im) << 7) | 0x00)
+#define SHIFT_IMM_LSR(im)	(((im) << 7) | 0x20)
+#define SHIFT_IMM_ASR(im)	(((im) << 7) | 0x40)
+#define SHIFT_IMM_ROR(im)	(((im) << 7) | 0x60)
+#define SHIFT_REG_LSL(rs)	(((rs) << 8) | 0x10)
+#define SHIFT_REG_LSR(rs)	(((rs) << 8) | 0x30)
+#define SHIFT_REG_ASR(rs)	(((rs) << 8) | 0x50)
+#define SHIFT_REG_ROR(rs)	(((rs) << 8) | 0x70)
+
+enum arm_cond_code_e {
+    COND_EQ = 0x0,
+    COND_NE = 0x1,
+    COND_CS = 0x2,	/* Unsigned greater or equal */
+    COND_CC = 0x3,	/* Unsigned less than */
+    COND_MI = 0x4,	/* Negative */
+    COND_PL = 0x5,	/* Zero or greater */
+    COND_VS = 0x6,	/* Overflow */
+    COND_VC = 0x7,	/* No overflow */
+    COND_HI = 0x8,	/* Unsigned greater than */
+    COND_LS = 0x9,	/* Unsigned less or equal */
+    COND_GE = 0xa,
+    COND_LT = 0xb,
+    COND_GT = 0xc,
+    COND_LE = 0xd,
+    COND_AL = 0xe,
+};
+
+static const uint8_t tcg_cond_to_arm_cond[10] = {
+    [TCG_COND_EQ] = COND_EQ,
+    [TCG_COND_NE] = COND_NE,
+    [TCG_COND_LT] = COND_LT,
+    [TCG_COND_GE] = COND_GE,
+    [TCG_COND_LE] = COND_LE,
+    [TCG_COND_GT] = COND_GT,
+    /* unsigned */
+    [TCG_COND_LTU] = COND_CC,
+    [TCG_COND_GEU] = COND_CS,
+    [TCG_COND_LEU] = COND_LS,
+    [TCG_COND_GTU] = COND_HI,
+};
+
+static inline void tcg_out_bx(TCGContext *s, int cond, int rn)
+{
+    tcg_out32(s, (cond << 28) | 0x012fff10 | rn);
+}
+
+static inline void tcg_out_b(TCGContext *s, int cond, int32_t offset)
+{
+    tcg_out32(s, (cond << 28) | 0x0a000000 |
+                    (((offset - 8) >> 2) & 0x00ffffff));
+}
+
+static inline void tcg_out_bl(TCGContext *s, int cond, int32_t offset)
+{
+    tcg_out32(s, (cond << 28) | 0x0b000000 |
+                    (((offset - 8) >> 2) & 0x00ffffff));
+}
+
+static inline void tcg_out_dat_reg(TCGContext *s,
+                int cond, int opc, int rd, int rn, int rm, int shift)
+{
+    tcg_out32(s, (cond << 28) | (0 << 25) | (opc << 21) | TO_CPSR(opc) |
+                    (rn << 16) | (rd << 12) | shift | rm);
+}
+
+static inline void tcg_out_dat_reg2(TCGContext *s,
+                int cond, int opc0, int opc1, int rd0, int rd1,
+                int rn0, int rn1, int rm0, int rm1, int shift)
+{
+    tcg_out32(s, (cond << 28) | (0 << 25) | (opc0 << 21) | (1 << 20) |
+                    (rn0 << 16) | (rd0 << 12) | shift | rm0);
+    tcg_out32(s, (cond << 28) | (0 << 25) | (opc1 << 21) |
+                    (rn1 << 16) | (rd1 << 12) | shift | rm1);
+}
+
+static inline void tcg_out_dat_imm(TCGContext *s,
+                int cond, int opc, int rd, int rn, int im)
+{
+    tcg_out32(s, (cond << 28) | (1 << 25) | (opc << 21) |
+                    (rn << 16) | (rd << 12) | im);
+}
+
+static inline void tcg_out_movi32(TCGContext *s,
+                int cond, int rd, int32_t arg)
+{
+    int offset = (uint32_t) arg - ((uint32_t) s->code_ptr + 8);
+
+    /* TODO: This is very suboptimal, we can easily have a constant
+     * pool somewhere after all the instructions.  */
+
+    if (arg < 0 && arg > -0x100)
+        return tcg_out_dat_imm(s, cond, ARITH_MVN, rd, 0, (~arg) & 0xff);
+
+    if (offset < 0x100 && offset > -0x100)
+        return offset >= 0 ?
+                tcg_out_dat_imm(s, cond, ARITH_ADD, rd, 15, offset) :
+                tcg_out_dat_imm(s, cond, ARITH_SUB, rd, 15, -offset);
+
+    tcg_out_dat_imm(s, cond, ARITH_MOV, rd, 0, arg & 0xff);
+    if (arg & 0x0000ff00)
+        tcg_out_dat_imm(s, cond, ARITH_ORR, rd, rd,
+                        ((arg >>  8) & 0xff) | 0xc00);
+    if (arg & 0x00ff0000)
+        tcg_out_dat_imm(s, cond, ARITH_ORR, rd, rd,
+                        ((arg >> 16) & 0xff) | 0x800);
+    if (arg & 0xff000000)
+        tcg_out_dat_imm(s, cond, ARITH_ORR, rd, rd,
+                        ((arg >> 24) & 0xff) | 0x400);
+}
+
+static inline void tcg_out_mul32(TCGContext *s,
+                int cond, int rd, int rs, int rm)
+{
+    if (rd != rm)
+        tcg_out32(s, (cond << 28) | (rd << 16) | (0 << 12) |
+                        (rs << 8) | 0x90 | rm);
+    else if (rd != rs)
+        tcg_out32(s, (cond << 28) | (rd << 16) | (0 << 12) |
+                        (rm << 8) | 0x90 | rs);
+    else {
+        tcg_out32(s, (cond << 28) | ( 8 << 16) | (0 << 12) |
+                        (rs << 8) | 0x90 | rm);
+        tcg_out_dat_reg(s, cond, ARITH_MOV,
+                        rd, 0, 8, SHIFT_IMM_LSL(0));
+    }
+}
+
+static inline void tcg_out_umull32(TCGContext *s,
+                int cond, int rd0, int rd1, int rs, int rm)
+{
+    if (rd0 != rm && rd1 != rm)
+        tcg_out32(s, (cond << 28) | 0x800090 |
+                        (rd1 << 16) | (rd0 << 12) | (rs << 8) | rm);
+    else if (rd0 != rs && rd1 != rs)
+        tcg_out32(s, (cond << 28) | 0x800090 |
+                        (rd1 << 16) | (rd0 << 12) | (rm << 8) | rs);
+    else {
+        tcg_out_dat_reg(s, cond, ARITH_MOV,
+                        TCG_REG_R8, 0, rm, SHIFT_IMM_LSL(0));
+        tcg_out32(s, (cond << 28) | 0x800098 |
+                        (rd1 << 16) | (rd0 << 12) | (rs << 8));
+    }
+}
+
+static inline void tcg_out_smull32(TCGContext *s,
+                int cond, int rd0, int rd1, int rs, int rm)
+{
+    if (rd0 != rm && rd1 != rm)
+        tcg_out32(s, (cond << 28) | 0xc00090 |
+                        (rd1 << 16) | (rd0 << 12) | (rs << 8) | rm);
+    else if (rd0 != rs && rd1 != rs)
+        tcg_out32(s, (cond << 28) | 0xc00090 |
+                        (rd1 << 16) | (rd0 << 12) | (rm << 8) | rs);
+    else {
+        tcg_out_dat_reg(s, cond, ARITH_MOV,
+                        TCG_REG_R8, 0, rm, SHIFT_IMM_LSL(0));
+        tcg_out32(s, (cond << 28) | 0xc00098 |
+                        (rd1 << 16) | (rd0 << 12) | (rs << 8));
+    }
+}
+
+static inline void tcg_out_ld32_12(TCGContext *s, int cond,
+                int rd, int rn, tcg_target_long im)
+{
+    if (im >= 0)
+        tcg_out32(s, (cond << 28) | 0x05900000 |
+                        (rn << 16) | (rd << 12) | (im & 0xfff));
+    else
+        tcg_out32(s, (cond << 28) | 0x05100000 |
+                        (rn << 16) | (rd << 12) | ((-im) & 0xfff));
+}
+
+static inline void tcg_out_st32_12(TCGContext *s, int cond,
+                int rd, int rn, tcg_target_long im)
+{
+    if (im >= 0)
+        tcg_out32(s, (cond << 28) | 0x05800000 |
+                        (rn << 16) | (rd << 12) | (im & 0xfff));
+    else
+        tcg_out32(s, (cond << 28) | 0x05000000 |
+                        (rn << 16) | (rd << 12) | ((-im) & 0xfff));
+}
+
+static inline void tcg_out_ld32_r(TCGContext *s, int cond,
+                int rd, int rn, int rm)
+{
+    tcg_out32(s, (cond << 28) | 0x07900000 |
+                    (rn << 16) | (rd << 12) | rm);
+}
+
+static inline void tcg_out_st32_r(TCGContext *s, int cond,
+                int rd, int rn, int rm)
+{
+    tcg_out32(s, (cond << 28) | 0x07800000 |
+                    (rn << 16) | (rd << 12) | rm);
+}
+
+static inline void tcg_out_ld16u_8(TCGContext *s, int cond,
+                int rd, int rn, tcg_target_long im)
+{
+    if (im >= 0)
+        tcg_out32(s, (cond << 28) | 0x01d000b0 |
+                        (rn << 16) | (rd << 12) |
+                        ((im & 0xf0) << 4) | (im & 0xf));
+    else
+        tcg_out32(s, (cond << 28) | 0x015000b0 |
+                        (rn << 16) | (rd << 12) |
+                        (((-im) & 0xf0) << 4) | ((-im) & 0xf));
+}
+
+static inline void tcg_out_st16u_8(TCGContext *s, int cond,
+                int rd, int rn, tcg_target_long im)
+{
+    if (im >= 0)
+        tcg_out32(s, (cond << 28) | 0x01c000b0 |
+                        (rn << 16) | (rd << 12) |
+                        ((im & 0xf0) << 4) | (im & 0xf));
+    else
+        tcg_out32(s, (cond << 28) | 0x014000b0 |
+                        (rn << 16) | (rd << 12) |
+                        (((-im) & 0xf0) << 4) | ((-im) & 0xf));
+}
+
+static inline void tcg_out_ld16u_r(TCGContext *s, int cond,
+                int rd, int rn, int rm)
+{
+    tcg_out32(s, (cond << 28) | 0x019000b0 |
+                    (rn << 16) | (rd << 12) | rm);
+}
+
+static inline void tcg_out_st16u_r(TCGContext *s, int cond,
+                int rd, int rn, int rm)
+{
+    tcg_out32(s, (cond << 28) | 0x018000b0 |
+                    (rn << 16) | (rd << 12) | rm);
+}
+
+static inline void tcg_out_ld16s_8(TCGContext *s, int cond,
+                int rd, int rn, tcg_target_long im)
+{
+    if (im >= 0)
+        tcg_out32(s, (cond << 28) | 0x01d000f0 |
+                        (rn << 16) | (rd << 12) |
+                        ((im & 0xf0) << 4) | (im & 0xf));
+    else
+        tcg_out32(s, (cond << 28) | 0x015000f0 |
+                        (rn << 16) | (rd << 12) |
+                        (((-im) & 0xf0) << 4) | ((-im) & 0xf));
+}
+
+static inline void tcg_out_st16s_8(TCGContext *s, int cond,
+                int rd, int rn, tcg_target_long im)
+{
+    if (im >= 0)
+        tcg_out32(s, (cond << 28) | 0x01c000f0 |
+                        (rn << 16) | (rd << 12) |
+                        ((im & 0xf0) << 4) | (im & 0xf));
+    else
+        tcg_out32(s, (cond << 28) | 0x014000f0 |
+                        (rn << 16) | (rd << 12) |
+                        (((-im) & 0xf0) << 4) | ((-im) & 0xf));
+}
+
+static inline void tcg_out_ld16s_r(TCGContext *s, int cond,
+                int rd, int rn, int rm)
+{
+    tcg_out32(s, (cond << 28) | 0x019000f0 |
+                    (rn << 16) | (rd << 12) | rm);
+}
+
+static inline void tcg_out_st16s_r(TCGContext *s, int cond,
+                int rd, int rn, int rm)
+{
+    tcg_out32(s, (cond << 28) | 0x018000f0 |
+                    (rn << 16) | (rd << 12) | rm);
+}
+
+static inline void tcg_out_ld8_12(TCGContext *s, int cond,
+                int rd, int rn, tcg_target_long im)
+{
+    if (im >= 0)
+        tcg_out32(s, (cond << 28) | 0x05d00000 |
+                        (rn << 16) | (rd << 12) | (im & 0xfff));
+    else
+        tcg_out32(s, (cond << 28) | 0x05500000 |
+                        (rn << 16) | (rd << 12) | ((-im) & 0xfff));
+}
+
+static inline void tcg_out_st8_12(TCGContext *s, int cond,
+                int rd, int rn, tcg_target_long im)
+{
+    if (im >= 0)
+        tcg_out32(s, (cond << 28) | 0x05c00000 |
+                        (rn << 16) | (rd << 12) | (im & 0xfff));
+    else
+        tcg_out32(s, (cond << 28) | 0x05400000 |
+                        (rn << 16) | (rd << 12) | ((-im) & 0xfff));
+}
+
+static inline void tcg_out_ld8_r(TCGContext *s, int cond,
+                int rd, int rn, int rm)
+{
+    tcg_out32(s, (cond << 28) | 0x07d00000 |
+                    (rn << 16) | (rd << 12) | rm);
+}
+
+static inline void tcg_out_st8_r(TCGContext *s, int cond,
+                int rd, int rn, int rm)
+{
+    tcg_out32(s, (cond << 28) | 0x07c00000 |
+                    (rn << 16) | (rd << 12) | rm);
+}
+
+static inline void tcg_out_ld8s_8(TCGContext *s, int cond,
+                int rd, int rn, tcg_target_long im)
+{
+    if (im >= 0)
+        tcg_out32(s, (cond << 28) | 0x01d000d0 |
+                        (rn << 16) | (rd << 12) |
+                        ((im & 0xf0) << 4) | (im & 0xf));
+    else
+        tcg_out32(s, (cond << 28) | 0x015000d0 |
+                        (rn << 16) | (rd << 12) |
+                        (((-im) & 0xf0) << 4) | ((-im) & 0xf));
+}
+
+static inline void tcg_out_st8s_8(TCGContext *s, int cond,
+                int rd, int rn, tcg_target_long im)
+{
+    if (im >= 0)
+        tcg_out32(s, (cond << 28) | 0x01c000d0 |
+                        (rn << 16) | (rd << 12) |
+                        ((im & 0xf0) << 4) | (im & 0xf));
+    else
+        tcg_out32(s, (cond << 28) | 0x014000d0 |
+                        (rn << 16) | (rd << 12) |
+                        (((-im) & 0xf0) << 4) | ((-im) & 0xf));
+}
+
+static inline void tcg_out_ld8s_r(TCGContext *s, int cond,
+                int rd, int rn, int rm)
+{
+    tcg_out32(s, (cond << 28) | 0x019000f0 |
+                    (rn << 16) | (rd << 12) | rm);
+}
+
+static inline void tcg_out_st8s_r(TCGContext *s, int cond,
+                int rd, int rn, int rm)
+{
+    tcg_out32(s, (cond << 28) | 0x018000f0 |
+                    (rn << 16) | (rd << 12) | rm);
+}
+
+static inline void tcg_out_ld32u(TCGContext *s, int cond,
+                int rd, int rn, int32_t offset)
+{
+    if (offset > 0xfff || offset < -0xfff) {
+        tcg_out_movi32(s, cond, TCG_REG_R8, offset);
+        tcg_out_ld32_r(s, cond, rd, rn, TCG_REG_R8);
+    } else
+        tcg_out_ld32_12(s, cond, rd, rn, offset);
+}
+
+static inline void tcg_out_st32(TCGContext *s, int cond,
+                int rd, int rn, int32_t offset)
+{
+    if (offset > 0xfff || offset < -0xfff) {
+        tcg_out_movi32(s, cond, TCG_REG_R8, offset);
+        tcg_out_st32_r(s, cond, rd, rn, TCG_REG_R8);
+    } else
+        tcg_out_st32_12(s, cond, rd, rn, offset);
+}
+
+static inline void tcg_out_ld16u(TCGContext *s, int cond,
+                int rd, int rn, int32_t offset)
+{
+    if (offset > 0xff || offset < -0xff) {
+        tcg_out_movi32(s, cond, TCG_REG_R8, offset);
+        tcg_out_ld16u_r(s, cond, rd, rn, TCG_REG_R8);
+    } else
+        tcg_out_ld16u_8(s, cond, rd, rn, offset);
+}
+
+static inline void tcg_out_ld16s(TCGContext *s, int cond,
+                int rd, int rn, int32_t offset)
+{
+    if (offset > 0xff || offset < -0xff) {
+        tcg_out_movi32(s, cond, TCG_REG_R8, offset);
+        tcg_out_ld16s_r(s, cond, rd, rn, TCG_REG_R8);
+    } else
+        tcg_out_ld16s_8(s, cond, rd, rn, offset);
+}
+
+static inline void tcg_out_st16u(TCGContext *s, int cond,
+                int rd, int rn, int32_t offset)
+{
+    if (offset > 0xff || offset < -0xff) {
+        tcg_out_movi32(s, cond, TCG_REG_R8, offset);
+        tcg_out_st16u_r(s, cond, rd, rn, TCG_REG_R8);
+    } else
+        tcg_out_st16u_8(s, cond, rd, rn, offset);
+}
+
+static inline void tcg_out_ld8u(TCGContext *s, int cond,
+                int rd, int rn, int32_t offset)
+{
+    if (offset > 0xfff || offset < -0xfff) {
+        tcg_out_movi32(s, cond, TCG_REG_R8, offset);
+        tcg_out_ld8_r(s, cond, rd, rn, TCG_REG_R8);
+    } else
+        tcg_out_ld8_12(s, cond, rd, rn, offset);
+}
+
+static inline void tcg_out_ld8s(TCGContext *s, int cond,
+                int rd, int rn, int32_t offset)
+{
+    if (offset > 0xff || offset < -0xff) {
+        tcg_out_movi32(s, cond, TCG_REG_R8, offset);
+        tcg_out_ld8s_r(s, cond, rd, rn, TCG_REG_R8);
+    } else
+        tcg_out_ld8s_8(s, cond, rd, rn, offset);
+}
+
+static inline void tcg_out_st8u(TCGContext *s, int cond,
+                int rd, int rn, int32_t offset)
+{
+    if (offset > 0xfff || offset < -0xfff) {
+        tcg_out_movi32(s, cond, TCG_REG_R8, offset);
+        tcg_out_st8_r(s, cond, rd, rn, TCG_REG_R8);
+    } else
+        tcg_out_st8_12(s, cond, rd, rn, offset);
+}
+
+static inline void tcg_out_goto(TCGContext *s, int cond, uint32_t addr)
+{
+    int32_t val;
+
+    val = addr - (tcg_target_long) s->code_ptr;
+    if (val - 8 < 0x01fffffd && val - 8 > -0x01fffffd)
+        tcg_out_b(s, cond, val);
+    else {
+#if 1
+        tcg_abort();
+#else
+        if (cond == COND_AL) {
+            tcg_out_ld32_12(s, COND_AL, 15, 15, -4);
+            tcg_out32(s, addr); /* XXX: This is l->u.value, can we use it? */
+        } else {
+            tcg_out_movi32(s, cond, TCG_REG_R8, val - 8);
+            tcg_out_dat_reg(s, cond, ARITH_ADD,
+                            15, 15, TCG_REG_R8, SHIFT_IMM_LSL(0));
+        }
+#endif
+    }
+}
+
+static inline void tcg_out_call(TCGContext *s, int cond, uint32_t addr)
+{
+    int32_t val;
+
+#ifdef SAVE_LR
+    tcg_out_dat_reg(s, cond, ARITH_MOV, TCG_REG_R8, 0, 14, SHIFT_IMM_LSL(0));
+#endif
+
+    val = addr - (tcg_target_long) s->code_ptr;
+    if (val < 0x01fffffd && val > -0x01fffffd)
+        tcg_out_bl(s, cond, val);
+    else {
+#if 1
+        tcg_abort();
+#else
+        if (cond == COND_AL) {
+            tcg_out_dat_imm(s, cond, ARITH_ADD, 14, 15, 4);
+            tcg_out_ld32_12(s, COND_AL, 15, 15, -4);
+            tcg_out32(s, addr); /* XXX: This is l->u.value, can we use it? */
+        } else {
+            tcg_out_movi32(s, cond, TCG_REG_R9, addr);
+            tcg_out_dat_imm(s, cond, ARITH_MOV, 14, 0, 15);
+            tcg_out_bx(s, cond, TCG_REG_R9);
+        }
+#endif
+    }
+
+#ifdef SAVE_LR
+    tcg_out_dat_reg(s, cond, ARITH_MOV, 14, 0, TCG_REG_R8, SHIFT_IMM_LSL(0));
+#endif
+}
+
+static inline void tcg_out_callr(TCGContext *s, int cond, int arg)
+{
+#ifdef SAVE_LR
+    tcg_out_dat_reg(s, cond, ARITH_MOV, TCG_REG_R8, 0, 14, SHIFT_IMM_LSL(0));
+#endif
+    /* TODO: on ARMv5 and ARMv6 replace with tcg_out_blx(s, cond, arg);  */
+    tcg_out_dat_reg(s, cond, ARITH_MOV, 14, 0, 15, SHIFT_IMM_LSL(0));
+    tcg_out_bx(s, cond, arg);
+#ifdef SAVE_LR
+    tcg_out_dat_reg(s, cond, ARITH_MOV, 14, 0, TCG_REG_R8, SHIFT_IMM_LSL(0));
+#endif
+}
+
+static inline void tcg_out_goto_label(TCGContext *s, int cond, int label_index)
+{
+    TCGLabel *l = &s->labels[label_index];
+
+    if (l->has_value)
+        tcg_out_goto(s, cond, l->u.value);
+    else if (cond == COND_AL) {
+        tcg_out_ld32_12(s, COND_AL, 15, 15, -4);
+        tcg_out_reloc(s, s->code_ptr, R_ARM_ABS32, label_index, 31337);
+        s->code_ptr += 4;
+    } else {
+        /* Probably this should be preferred even for COND_AL... */
+        tcg_out_reloc(s, s->code_ptr, R_ARM_PC24, label_index, 31337);
+        tcg_out_b(s, cond, 8);
+    }
+}
+
+static void tcg_out_div_helper(TCGContext *s, int cond, const TCGArg *args,
+                void *helper_div, void *helper_rem, int shift)
+{
+    int div_reg = args[0];
+    int rem_reg = args[1];
+
+    /* stmdb sp!, { r0 - r3, ip, lr } */
+    /* (Note that we need an even number of registers as per EABI) */
+    tcg_out32(s, (cond << 28) | 0x092d500f);
+
+    tcg_out_dat_reg(s, cond, ARITH_MOV, 0, 0, args[2], SHIFT_IMM_LSL(0));
+    tcg_out_dat_reg(s, cond, ARITH_MOV, 1, 0, args[3], SHIFT_IMM_LSL(0));
+    tcg_out_dat_reg(s, cond, ARITH_MOV, 2, 0, args[4], SHIFT_IMM_LSL(0));
+    tcg_out_dat_reg(s, cond, ARITH_MOV, 3, 0, 2, shift);
+
+    tcg_out_call(s, cond, (uint32_t) helper_div);
+    tcg_out_dat_reg(s, cond, ARITH_MOV, 8, 0, 0, SHIFT_IMM_LSL(0));
+
+    /* ldmia sp, { r0 - r3, fp, lr } */
+    tcg_out32(s, (cond << 28) | 0x089d500f);
+
+    tcg_out_dat_reg(s, cond, ARITH_MOV, 0, 0, args[2], SHIFT_IMM_LSL(0));
+    tcg_out_dat_reg(s, cond, ARITH_MOV, 1, 0, args[3], SHIFT_IMM_LSL(0));
+    tcg_out_dat_reg(s, cond, ARITH_MOV, 2, 0, args[4], SHIFT_IMM_LSL(0));
+    tcg_out_dat_reg(s, cond, ARITH_MOV, 3, 0, 2, shift);
+
+    tcg_out_call(s, cond, (uint32_t) helper_rem);
+
+    tcg_out_dat_reg(s, cond, ARITH_MOV, rem_reg, 0, 0, SHIFT_IMM_LSL(0));
+    tcg_out_dat_reg(s, cond, ARITH_MOV, div_reg, 0, 8, SHIFT_IMM_LSL(0));
+
+    /* ldr r0, [sp], #4 */
+    if (rem_reg != 0 && div_reg != 0)
+        tcg_out32(s, (cond << 28) | 0x04bd0004);
+    /* ldr r1, [sp], #4 */
+    if (rem_reg != 1 && div_reg != 1)
+        tcg_out32(s, (cond << 28) | 0x04bd1004);
+    /* ldr r2, [sp], #4 */
+    if (rem_reg != 2 && div_reg != 2)
+        tcg_out32(s, (cond << 28) | 0x04bd2004);
+    /* ldr r3, [sp], #4 */
+    if (rem_reg != 3 && div_reg != 3)
+        tcg_out32(s, (cond << 28) | 0x04bd3004);
+    /* ldr ip, [sp], #4 */
+    if (rem_reg != 12 && div_reg != 12)
+        tcg_out32(s, (cond << 28) | 0x04bdc004);
+    /* ldr lr, [sp], #4 */
+    if (rem_reg != 14 && div_reg != 14)
+        tcg_out32(s, (cond << 28) | 0x04bde004);
+}
+
+#ifdef CONFIG_SOFTMMU
+extern void __ldb_mmu(void);
+extern void __ldw_mmu(void);
+extern void __ldl_mmu(void);
+extern void __ldq_mmu(void);
+
+extern void __stb_mmu(void);
+extern void __stw_mmu(void);
+extern void __stl_mmu(void);
+extern void __stq_mmu(void);
+
+static void *qemu_ld_helpers[4] = {
+    __ldb_mmu,
+    __ldw_mmu,
+    __ldl_mmu,
+    __ldq_mmu,
+};
+
+static void *qemu_st_helpers[4] = {
+    __stb_mmu,
+    __stw_mmu,
+    __stl_mmu,
+    __stq_mmu,
+};
+#endif
+
+static inline void tcg_out_qemu_ld(TCGContext *s, int cond,
+                const TCGArg *args, int opc)
+{
+    int addr_reg, data_reg, data_reg2;
+#ifdef CONFIG_SOFTMMU
+    int mem_index, s_bits;
+# if TARGET_LONG_BITS == 64
+    int addr_reg2;
+# endif
+# ifdef USE_TLB
+    uint32_t *label_ptr;
+# endif
+#endif
+
+    data_reg = *args++;
+    if (opc == 3)
+        data_reg2 = *args++;
+    else
+        data_reg2 = 0; /* surpress warning */
+    addr_reg = *args++;
+#if TARGET_LONG_BITS == 64
+    addr_reg2 = *args++;
+#endif
+#ifdef CONFIG_SOFTMMU
+    mem_index = *args;
+    s_bits = opc & 3;
+
+# ifdef USE_TLB
+    tcg_out_dat_reg(s, COND_AL, ARITH_MOV,
+                    8, 0, addr_reg, SHIFT_IMM_ROR(TARGET_PAGE_BITS));
+    tcg_out_dat_imm(s, COND_AL, ARITH_AND,
+                    0, 8, CPU_TLB_SIZE - 1);
+    tcg_out_dat_reg(s, COND_AL, ARITH_ADD,
+                    0, TCG_AREG0, 0, SHIFT_IMM_LSL(CPU_TLB_ENTRY_BITS));
+    tcg_out_ld32_12(s, COND_AL, 1, 0,
+                    offsetof(CPUState, tlb_table[mem_index][0].addr_read));
+    tcg_out_dat_reg(s, COND_AL, ARITH_CMP,
+                    0, 1, 8, SHIFT_IMM_LSL(TARGET_PAGE_BITS));
+    /* TODO: alignment check?
+     * if (s_bits)
+     * tcg_out_data_reg(s, COND_EQ, ARITH_EOR,
+     *                  0, 1, 8, SHIFT_IMM_LSR(32 - s_bits));
+     */
+#  if TARGET_LONG_BITS == 64
+    /* XXX: possibly we could use a block data load or writeback in
+     * the first access.  */
+    tcg_out_ld32_12(s, COND_EQ, 1, 0,
+                    offsetof(CPUState, tlb_table[mem_index][0].addr_read) + 4);
+    tcg_out_dat_reg(s, COND_EQ, ARITH_CMP,
+                    0, 1, addr_reg2, SHIFT_IMM_LSL(0));
+#  endif
+    tcg_out_ld32_12(s, COND_EQ, 1, 0,
+                    offsetof(CPUState, tlb_table[mem_index][0].addend));
+
+    switch (opc) {
+    case 0:
+        tcg_out_ld8_r(s, COND_EQ, data_reg, addr_reg, 1);
+        break;
+    case 0 | 4:
+        tcg_out_ld8s_r(s, COND_EQ, data_reg, addr_reg, 1);
+        break;
+    case 1:
+        tcg_out_ld16u_r(s, COND_EQ, data_reg, addr_reg, 1);
+        break;
+    case 1 | 4:
+        tcg_out_ld16s_r(s, COND_EQ, data_reg, addr_reg, 1);
+        break;
+    case 2:
+    default:
+        tcg_out_ld32_r(s, COND_EQ, data_reg, addr_reg, 1);
+        break;
+    case 3:
+        /* TODO: must write back */
+        tcg_out_ld32_r(s, COND_EQ, data_reg, 1, addr_reg);
+        tcg_out_ld32_12(s, COND_EQ, data_reg2, 1, 4);
+        break;
+    }
+
+    label_ptr = (void *) s->code_ptr;
+    tcg_out_b(s, COND_EQ, 8);
+# endif
+
+# ifdef SAVE_LR
+    tcg_out_dat_reg(s, cond, ARITH_MOV, 8, 0, 14, SHIFT_IMM_LSL(0));
+# endif
+
+    /* TODO: move this code to where the constants pool will be */
+    if (addr_reg)
+        tcg_out_dat_reg(s, cond, ARITH_MOV,
+                        0, 0, addr_reg, SHIFT_IMM_LSL(0));
+# if TARGET_LONG_BITS == 32
+    tcg_out_dat_imm(s, cond, ARITH_MOV, 1, 0, mem_index);
+# else
+    if (addr_reg2 != 1)
+        tcg_out_dat_reg(s, cond, ARITH_MOV,
+                        1, 0, addr_reg2, SHIFT_IMM_LSL(0));
+    tcg_out_dat_imm(s, cond, ARITH_MOV, 2, 0, mem_index);
+# endif
+    tcg_out_bl(s, cond, (tcg_target_long) qemu_ld_helpers[s_bits] - 
+                    (tcg_target_long) s->code_ptr);
+
+    switch (opc) {
+    case 0 | 4:
+        tcg_out_dat_reg(s, cond, ARITH_MOV,
+                        0, 0, 0, SHIFT_IMM_LSL(24));
+        tcg_out_dat_reg(s, cond, ARITH_MOV,
+                        data_reg, 0, 0, SHIFT_IMM_ASR(24));
+        break;
+    case 1 | 4:
+        tcg_out_dat_reg(s, cond, ARITH_MOV,
+                        0, 0, 0, SHIFT_IMM_LSL(16));
+        tcg_out_dat_reg(s, cond, ARITH_MOV,
+                        data_reg, 0, 0, SHIFT_IMM_ASR(16));
+        break;
+    case 0:
+    case 1:
+    case 2:
+    default:
+        if (data_reg)
+            tcg_out_dat_reg(s, cond, ARITH_MOV,
+                            data_reg, 0, 0, SHIFT_IMM_LSL(0));
+        break;
+    case 3:
+        if (data_reg2 != 1)
+            tcg_out_dat_reg(s, cond, ARITH_MOV,
+                            data_reg2, 0, 1, SHIFT_IMM_LSL(0));
+        if (data_reg != 0)
+            tcg_out_dat_reg(s, cond, ARITH_MOV,
+                            data_reg, 0, 0, SHIFT_IMM_LSL(0));
+        break;
+    }
+
+# ifdef SAVE_LR
+    tcg_out_dat_reg(s, cond, ARITH_MOV, 14, 0, 8, SHIFT_IMM_LSL(0));
+# endif
+
+# ifdef USE_TLB
+    *label_ptr += ((void *) s->code_ptr - (void *) label_ptr - 8) >> 2;
+# endif
+#else
+    switch (opc) {
+    case 0:
+        tcg_out_ld8_12(s, COND_AL, data_reg, addr_reg, 0);
+        break;
+    case 0 | 4:
+        tcg_out_ld8s_8(s, COND_AL, data_reg, addr_reg, 0);
+        break;
+    case 1:
+        tcg_out_ld16u_8(s, COND_AL, data_reg, addr_reg, 0);
+        break;
+    case 1 | 4:
+        tcg_out_ld16s_8(s, COND_AL, data_reg, addr_reg, 0);
+        break;
+    case 2:
+    default:
+        tcg_out_ld32_12(s, COND_AL, data_reg, addr_reg, 0);
+        break;
+    case 3:
+        /* TODO: use block load */
+        tcg_out_ld32_12(s, COND_AL, data_reg, addr_reg, 0);
+        tcg_out_ld32_12(s, COND_AL, data_reg2, addr_reg, 4);
+        break;
+    }
+#endif
+}
+
+static inline void tcg_out_qemu_st(TCGContext *s, int cond,
+                const TCGArg *args, int opc)
+{
+    int addr_reg, data_reg, data_reg2;
+#ifdef CONFIG_SOFTMMU
+    int mem_index, s_bits;
+# if TARGET_LONG_BITS == 64
+    int addr_reg2;
+# endif
+# ifdef USE_TLB
+    uint32_t *label_ptr;
+# endif
+#endif
+
+    data_reg = *args++;
+    if (opc == 3)
+        data_reg2 = *args++;
+    else
+        data_reg2 = 0; /* surpress warning */
+    addr_reg = *args++;
+#if TARGET_LONG_BITS == 64
+    addr_reg2 = *args++;
+#endif
+#ifdef CONFIG_SOFTMMU
+    mem_index = *args;
+    s_bits = opc & 3;
+
+# ifdef USE_TLB
+    tcg_out_dat_reg(s, COND_AL, ARITH_MOV,
+                    8, 0, addr_reg, SHIFT_IMM_ROR(TARGET_PAGE_BITS));
+    tcg_out_dat_imm(s, COND_AL, ARITH_AND,
+                    0, 8, CPU_TLB_SIZE - 1);
+    tcg_out_dat_reg(s, COND_AL, ARITH_ADD,
+                    0, TCG_AREG0, 0, SHIFT_IMM_LSL(CPU_TLB_ENTRY_BITS));
+    tcg_out_ld32_12(s, COND_AL, 1, 0,
+                    offsetof(CPUState, tlb_table[mem_index][0].addr_write));
+    tcg_out_dat_reg(s, COND_AL, ARITH_CMP,
+                    0, 1, 8, SHIFT_IMM_LSL(TARGET_PAGE_BITS));
+    /* TODO: alignment check?
+     * if (s_bits)
+     * tcg_out_data_reg(s, COND_EQ, ARITH_EOR,
+     *                  0, 1, 8, SHIFT_IMM_LSR(32 - s_bits));
+     */
+#  if TARGET_LONG_BITS == 64
+    /* XXX: possibly we could use a block data load or writeback in
+     * the first access.  */
+    tcg_out_ld32_12(s, COND_EQ, 1, 0,
+                    offsetof(CPUState, tlb_table[mem_index][0].addr_write)
+                    + 4);
+    tcg_out_dat_reg(s, COND_EQ, ARITH_CMP,
+                    0, 1, addr_reg2, SHIFT_IMM_LSL(0));
+#  endif
+    tcg_out_ld32_12(s, COND_EQ, 1, 0,
+                    offsetof(CPUState, tlb_table[mem_index][0].addend));
+
+    switch (opc) {
+    case 0:
+        tcg_out_st8_r(s, COND_EQ, data_reg, addr_reg, 1);
+        break;
+    case 0 | 4:
+        tcg_out_st8s_r(s, COND_EQ, data_reg, addr_reg, 1);
+        break;
+    case 1:
+        tcg_out_st16u_r(s, COND_EQ, data_reg, addr_reg, 1);
+        break;
+    case 1 | 4:
+        tcg_out_st16s_r(s, COND_EQ, data_reg, addr_reg, 1);
+        break;
+    case 2:
+    default:
+        tcg_out_st32_r(s, COND_EQ, data_reg, addr_reg, 1);
+        break;
+    case 3:
+        /* TODO: must write back */
+        tcg_out_st32_r(s, COND_EQ, data_reg, 1, addr_reg);
+        tcg_out_st32_12(s, COND_EQ, data_reg2, 1, 4);
+        break;
+    }
+
+    label_ptr = (void *) s->code_ptr;
+    tcg_out_b(s, COND_EQ, 8);
+# endif
+
+# ifdef SAVE_LR
+    tcg_out_dat_reg(s, cond, ARITH_MOV, 8, 0, 14, SHIFT_IMM_LSL(0));
+# endif
+
+    /* TODO: move this code to where the constants pool will be */
+    if (addr_reg)
+        tcg_out_dat_reg(s, cond, ARITH_MOV,
+                        0, 0, addr_reg, SHIFT_IMM_LSL(0));
+# if TARGET_LONG_BITS == 32
+    switch (opc) {
+    case 0:
+        tcg_out_dat_imm(s, cond, ARITH_AND, 1, data_reg, 0xff);
+        tcg_out_dat_imm(s, cond, ARITH_MOV, 2, 0, mem_index);
+        break;
+    case 1:
+        tcg_out_dat_reg(s, cond, ARITH_MOV,
+                        1, 0, data_reg, SHIFT_IMM_LSL(16));
+        tcg_out_dat_reg(s, cond, ARITH_MOV,
+                        1, 0, 1, SHIFT_IMM_LSR(16));
+        tcg_out_dat_imm(s, cond, ARITH_MOV, 2, 0, mem_index);
+        break;
+    case 2:
+        if (data_reg != 1)
+            tcg_out_dat_reg(s, cond, ARITH_MOV,
+                            1, 0, data_reg, SHIFT_IMM_LSL(0));
+        tcg_out_dat_imm(s, cond, ARITH_MOV, 2, 0, mem_index);
+        break;
+    case 3:
+        if (data_reg != 1)
+            tcg_out_dat_reg(s, cond, ARITH_MOV,
+                            1, 0, data_reg, SHIFT_IMM_LSL(0));
+        if (data_reg2 != 2)
+            tcg_out_dat_reg(s, cond, ARITH_MOV,
+                            2, 0, data_reg2, SHIFT_IMM_LSL(0));
+        tcg_out_dat_imm(s, cond, ARITH_MOV, 3, 0, mem_index);
+        break;
+    }
+# else
+    if (addr_reg2 != 1)
+        tcg_out_dat_reg(s, cond, ARITH_MOV,
+                        1, 0, addr_reg2, SHIFT_IMM_LSL(0));
+    switch (opc) {
+    case 0:
+        tcg_out_dat_imm(s, cond, ARITH_AND, 2, data_reg, 0xff);
+        tcg_out_dat_imm(s, cond, ARITH_MOV, 3, 0, mem_index);
+        break;
+    case 1:
+        tcg_out_dat_reg(s, cond, ARITH_MOV,
+                        2, 0, data_reg, SHIFT_IMM_LSL(16));
+        tcg_out_dat_reg(s, cond, ARITH_MOV,
+                        2, 0, 2, SHIFT_IMM_LSR(16));
+        tcg_out_dat_imm(s, cond, ARITH_MOV, 3, 0, mem_index);
+        break;
+    case 2:
+        if (data_reg != 2)
+            tcg_out_dat_reg(s, cond, ARITH_MOV,
+                            2, 0, data_reg, SHIFT_IMM_LSL(0));
+        tcg_out_dat_imm(s, cond, ARITH_MOV, 3, 0, mem_index);
+        break;
+    case 3:
+        tcg_out_dat_imm(s, cond, ARITH_MOV, 3, 0, mem_index);
+        tcg_out32(s, (cond << 28) | 0x052d3010); /* str r3, [sp, #-0x10]! */
+        if (data_reg != 2)
+            tcg_out_dat_reg(s, cond, ARITH_MOV,
+                            2, 0, data_reg, SHIFT_IMM_LSL(0));
+        if (data_reg2 != 3)
+            tcg_out_dat_reg(s, cond, ARITH_MOV,
+                            3, 0, data_reg2, SHIFT_IMM_LSL(0));
+        break;
+    }
+# endif
+
+    tcg_out_bl(s, cond, (tcg_target_long) qemu_st_helpers[s_bits] - 
+                    (tcg_target_long) s->code_ptr);
+
+# if TARGET_LONG_BITS == 64
+    if (opc == 3)
+        tcg_out_dat_imm(s, cond, ARITH_ADD, 13, 13, 0x10);
+# endif
+
+# ifdef SAVE_LR
+    tcg_out_dat_reg(s, cond, ARITH_MOV, 14, 0, 8, SHIFT_IMM_LSL(0));
+# endif
+
+# ifdef USE_TLB
+    *label_ptr += ((void *) s->code_ptr - (void *) label_ptr - 8) >> 2;
+# endif
+#else
+    switch (opc) {
+    case 0:
+        tcg_out_st8_12(s, COND_AL, data_reg, addr_reg, 0);
+        break;
+    case 0 | 4:
+        tcg_out_ld8s_8(s, COND_AL, data_reg, addr_reg, 0);
+        break;
+    case 1:
+        tcg_out_st16u_8(s, COND_AL, data_reg, addr_reg, 0);
+        break;
+    case 1 | 4:
+        tcg_out_st16s_8(s, COND_AL, data_reg, addr_reg, 0);
+        break;
+    case 2:
+    default:
+        tcg_out_st32_12(s, COND_AL, data_reg, addr_reg, 0);
+        break;
+    case 3:
+        /* TODO: use block store */
+        tcg_out_st32_12(s, COND_AL, data_reg, addr_reg, 0);
+        tcg_out_st32_12(s, COND_AL, data_reg2, addr_reg, 4);
+        break;
+    }
+#endif
+}
+
+extern void exec_loop;
+static uint8_t *tb_ret_addr;
+
+static inline void tcg_out_op(TCGContext *s, int opc, 
+                const TCGArg *args, const int *const_args)
+{
+    int c;
+
+    switch (opc) {
+    case INDEX_op_exit_tb:
+#ifdef SAVE_LR
+        if (args[0] >> 8)
+            tcg_out_ld32_12(s, COND_AL, TCG_REG_R0, 15, 0);
+        else
+            tcg_out_dat_imm(s, COND_AL, ARITH_MOV, TCG_REG_R0, 0, args[0]);
+        tcg_out_dat_reg(s, COND_AL, ARITH_MOV, 15, 0, 14, SHIFT_IMM_LSL(0));
+        if (args[0] >> 8)
+            tcg_out32(s, args[0]);
+#else
+        if (args[0] >> 8)
+            tcg_out_ld32_12(s, COND_AL, 0, 15, 0);
+        else
+            tcg_out_dat_imm(s, COND_AL, ARITH_MOV, 0, 0, args[0]);
+        tcg_out_goto(s, COND_AL, (tcg_target_ulong) tb_ret_addr);
+        if (args[0] >> 8)
+            tcg_out32(s, args[0]);
+#endif
+        break;
+    case INDEX_op_goto_tb:
+        if (s->tb_jmp_offset) {
+            /* Direct jump method */
+#if 1
+            s->tb_jmp_offset[args[0]] = s->code_ptr - s->code_buf;
+            tcg_out_b(s, COND_AL, 8);
+#else
+            tcg_out_ld32_12(s, COND_AL, 15, 15, -4);
+            s->tb_jmp_offset[args[0]] = s->code_ptr - s->code_buf;
+            tcg_out32(s, 0);
+#endif
+        } else {
+            /* Indirect jump method */
+#if 1
+            c = (int) (s->tb_next + args[0]) - ((int) s->code_ptr + 8);
+            if (c > 0xfff || c < -0xfff) {
+                tcg_out_movi32(s, COND_AL, TCG_REG_R0,
+                                (tcg_target_long) (s->tb_next + args[0]));
+                tcg_out_ld32_12(s, COND_AL, 15, TCG_REG_R0, 0);
+            } else
+                tcg_out_ld32_12(s, COND_AL, 15, 15, c);
+#else
+            tcg_out_ld32_12(s, COND_AL, TCG_REG_R0, 15, 0);
+            tcg_out_ld32_12(s, COND_AL, 15, TCG_REG_R0, 0);
+            tcg_out32(s, (tcg_target_long) (s->tb_next + args[0]));
+#endif
+        }
+        s->tb_next_offset[args[0]] = s->code_ptr - s->code_buf;
+        break;
+    case INDEX_op_call:
+        if (const_args[0])
+            tcg_out_call(s, COND_AL, args[0]);
+        else
+            tcg_out_callr(s, COND_AL, args[0]);
+        break;
+    case INDEX_op_jmp:
+        if (const_args[0])
+            tcg_out_goto(s, COND_AL, args[0]);
+        else
+            tcg_out_bx(s, COND_AL, args[0]);
+        break;
+    case INDEX_op_br:
+        tcg_out_goto_label(s, COND_AL, args[0]);
+        break;
+
+    case INDEX_op_ld8u_i32:
+        tcg_out_ld8u(s, COND_AL, args[0], args[1], args[2]);
+        break;
+    case INDEX_op_ld8s_i32:
+        tcg_out_ld8s(s, COND_AL, args[0], args[1], args[2]);
+        break;
+    case INDEX_op_ld16u_i32:
+        tcg_out_ld16u(s, COND_AL, args[0], args[1], args[2]);
+        break;
+    case INDEX_op_ld16s_i32:
+        tcg_out_ld16s(s, COND_AL, args[0], args[1], args[2]);
+        break;
+    case INDEX_op_ld_i32:
+        tcg_out_ld32u(s, COND_AL, args[0], args[1], args[2]);
+        break;
+    case INDEX_op_st8_i32:
+        tcg_out_st8u(s, COND_AL, args[0], args[1], args[2]);
+        break;
+    case INDEX_op_st16_i32:
+        tcg_out_st16u(s, COND_AL, args[0], args[1], args[2]);
+        break;
+    case INDEX_op_st_i32:
+        tcg_out_st32(s, COND_AL, args[0], args[1], args[2]);
+        break;
+
+    case INDEX_op_mov_i32:
+        tcg_out_dat_reg(s, COND_AL, ARITH_MOV,
+                        args[0], 0, args[1], SHIFT_IMM_LSL(0));
+        break;
+    case INDEX_op_movi_i32:
+        tcg_out_movi32(s, COND_AL, args[0], args[1]);
+        break;
+    case INDEX_op_add_i32:
+        c = ARITH_ADD;
+        goto gen_arith;
+    case INDEX_op_sub_i32:
+        c = ARITH_SUB;
+        goto gen_arith;
+    case INDEX_op_and_i32:
+        c = ARITH_AND;
+        goto gen_arith;
+    case INDEX_op_or_i32:
+        c = ARITH_ORR;
+        goto gen_arith;
+    case INDEX_op_xor_i32:
+        c = ARITH_EOR;
+        /* Fall through.  */
+    gen_arith:
+        tcg_out_dat_reg(s, COND_AL, c,
+                        args[0], args[1], args[2], SHIFT_IMM_LSL(0));
+        break;
+    case INDEX_op_add2_i32:
+        tcg_out_dat_reg2(s, COND_AL, ARITH_ADD, ARITH_ADC,
+                        args[0], args[1], args[2], args[3],
+                        args[4], args[5], SHIFT_IMM_LSL(0));
+        break;
+    case INDEX_op_sub2_i32:
+        tcg_out_dat_reg2(s, COND_AL, ARITH_SUB, ARITH_SBC,
+                        args[0], args[1], args[2], args[3],
+                        args[4], args[5], SHIFT_IMM_LSL(0));
+        break;
+    case INDEX_op_mul_i32:
+        tcg_out_mul32(s, COND_AL, args[0], args[1], args[2]);
+        break;
+    case INDEX_op_mulu2_i32:
+        tcg_out_umull32(s, COND_AL, args[0], args[1], args[2], args[3]);
+        break;
+    case INDEX_op_div2_i32:
+        tcg_out_div_helper(s, COND_AL, args,
+                        tcg_helper_div_i64, tcg_helper_rem_i64,
+                        SHIFT_IMM_ASR(31));
+        break;
+    case INDEX_op_divu2_i32:
+        tcg_out_div_helper(s, COND_AL, args,
+                        tcg_helper_divu_i64, tcg_helper_remu_i64,
+                        SHIFT_IMM_LSR(31));
+        break;
+    /* XXX: Perhaps args[2] & 0x1f is wrong */
+    case INDEX_op_shl_i32:
+        c = const_args[2] ?
+                SHIFT_IMM_LSL(args[2] & 0x1f) : SHIFT_REG_LSL(args[2]);
+        goto gen_shift32;
+    case INDEX_op_shr_i32:
+        c = const_args[2] ? (args[2] & 0x1f) ? SHIFT_IMM_LSR(args[2] & 0x1f) :
+                SHIFT_IMM_LSL(0) : SHIFT_REG_LSR(args[2]);
+        goto gen_shift32;
+    case INDEX_op_sar_i32:
+        c = const_args[2] ? (args[2] & 0x1f) ? SHIFT_IMM_ASR(args[2] & 0x1f) :
+                SHIFT_IMM_LSL(0) : SHIFT_REG_ASR(args[2]);
+        /* Fall through.  */
+    gen_shift32:
+        tcg_out_dat_reg(s, COND_AL, ARITH_MOV, args[0], 0, args[1], c);
+        break;
+
+    case INDEX_op_brcond_i32:
+        tcg_out_dat_reg(s, COND_AL, ARITH_CMP, 0,
+                        args[0], args[1], SHIFT_IMM_LSL(0));
+        tcg_out_goto_label(s, tcg_cond_to_arm_cond[args[2]], args[3]);
+        break;
+    case INDEX_op_brcond2_i32:
+        /* The resulting conditions are:
+         * TCG_COND_EQ    -->  a0 == a2 && a1 == a3,
+         * TCG_COND_NE    --> (a0 != a2 && a1 == a3) ||  a1 != a3,
+         * TCG_COND_LT(U) --> (a0 <  a2 && a1 == a3) ||  a1 <  a3,
+         * TCG_COND_GE(U) --> (a0 >= a2 && a1 == a3) || (a1 >= a3 && a1 != a3),
+         * TCG_COND_LE(U) --> (a0 <= a2 && a1 == a3) || (a1 <= a3 && a1 != a3),
+         * TCG_COND_GT(U) --> (a0 >  a2 && a1 == a3) ||  a1 >  a3,
+         */
+        tcg_out_dat_reg(s, COND_AL, ARITH_CMP, 0,
+                        args[1], args[3], SHIFT_IMM_LSL(0));
+        tcg_out_dat_reg(s, COND_EQ, ARITH_CMP, 0,
+                        args[0], args[2], SHIFT_IMM_LSL(0));
+        tcg_out_goto_label(s, tcg_cond_to_arm_cond[args[4]], args[5]);
+        break;
+
+    case INDEX_op_qemu_ld8u:
+        tcg_out_qemu_ld(s, COND_AL, args, 0);
+        break;
+    case INDEX_op_qemu_ld8s:
+        tcg_out_qemu_ld(s, COND_AL, args, 0 | 4);
+        break;
+    case INDEX_op_qemu_ld16u:
+        tcg_out_qemu_ld(s, COND_AL, args, 1);
+        break;
+    case INDEX_op_qemu_ld16s:
+        tcg_out_qemu_ld(s, COND_AL, args, 1 | 4);
+        break;
+    case INDEX_op_qemu_ld32u:
+        tcg_out_qemu_ld(s, COND_AL, args, 2);
+        break;
+    case INDEX_op_qemu_ld64:
+        tcg_out_qemu_ld(s, COND_AL, args, 3);
+        break;
+        
+    case INDEX_op_qemu_st8:
+        tcg_out_qemu_st(s, COND_AL, args, 0);
+        break;
+    case INDEX_op_qemu_st16:
+        tcg_out_qemu_st(s, COND_AL, args, 1);
+        break;
+    case INDEX_op_qemu_st32:
+        tcg_out_qemu_st(s, COND_AL, args, 2);
+        break;
+    case INDEX_op_qemu_st64:
+        tcg_out_qemu_st(s, COND_AL, args, 3);
+        break;
+
+    case INDEX_op_ext8s_i32:
+        tcg_out_dat_reg(s, COND_AL, ARITH_MOV,
+                        args[0], 0, args[1], SHIFT_IMM_LSL(24));
+        tcg_out_dat_reg(s, COND_AL, ARITH_MOV,
+                        args[0], 0, args[0], SHIFT_IMM_ASR(24));
+        break;
+    case INDEX_op_ext16s_i32:
+        tcg_out_dat_reg(s, COND_AL, ARITH_MOV,
+                        args[0], 0, args[1], SHIFT_IMM_LSL(16));
+        tcg_out_dat_reg(s, COND_AL, ARITH_MOV,
+                        args[0], 0, args[0], SHIFT_IMM_ASR(16));
+        break;
+
+    default:
+        tcg_abort();
+    }
+}
+
+static const TCGTargetOpDef arm_op_defs[] = {
+    { INDEX_op_exit_tb, { } },
+    { INDEX_op_goto_tb, { } },
+    { INDEX_op_call, { "ri" } },
+    { INDEX_op_jmp, { "ri" } },
+    { INDEX_op_br, { } },
+
+    { INDEX_op_mov_i32, { "r", "r" } },
+    { INDEX_op_movi_i32, { "r" } },
+
+    { 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" } },
+
+    /* TODO: "r", "r", "ri" */
+    { INDEX_op_add_i32, { "r", "r", "r" } },
+    { INDEX_op_sub_i32, { "r", "r", "r" } },
+    { INDEX_op_mul_i32, { "r", "r", "r" } },
+    { INDEX_op_mulu2_i32, { "r", "r", "r", "r" } },
+    { INDEX_op_div2_i32, { "r", "r", "r", "1", "2" } },
+    { INDEX_op_divu2_i32, { "r", "r", "r", "1", "2" } },
+    { INDEX_op_and_i32, { "r", "r", "r" } },
+    { INDEX_op_or_i32, { "r", "r", "r" } },
+    { INDEX_op_xor_i32, { "r", "r", "r" } },
+
+    { INDEX_op_shl_i32, { "r", "r", "ri" } },
+    { INDEX_op_shr_i32, { "r", "r", "ri" } },
+    { INDEX_op_sar_i32, { "r", "r", "ri" } },
+
+    { INDEX_op_brcond_i32, { "r", "r" } },
+
+    /* TODO: "r", "r", "r", "r", "ri", "ri" */
+    { INDEX_op_add2_i32, { "r", "r", "r", "r", "r", "r" } },
+    { INDEX_op_sub2_i32, { "r", "r", "r", "r", "r", "r" } },
+    { INDEX_op_brcond2_i32, { "r", "r", "r", "r" } },
+
+    { INDEX_op_qemu_ld8u, { "r", "x", "X" } },
+    { INDEX_op_qemu_ld8s, { "r", "x", "X" } },
+    { INDEX_op_qemu_ld16u, { "r", "x", "X" } },
+    { INDEX_op_qemu_ld16s, { "r", "x", "X" } },
+    { INDEX_op_qemu_ld32u, { "r", "x", "X" } },
+    { INDEX_op_qemu_ld64, { "r", "d", "x", "X" } },
+
+    { INDEX_op_qemu_st8, { "d", "x", "X" } },
+    { INDEX_op_qemu_st16, { "d", "x", "X" } },
+    { INDEX_op_qemu_st32, { "d", "x", "X" } },
+    { INDEX_op_qemu_st64, { "d", "D", "x", "X" } },
+
+    { INDEX_op_ext8s_i32, { "r", "r" } },
+    { INDEX_op_ext16s_i32, { "r", "r" } },
+
+    { -1 },
+};
+
+void tcg_target_init(TCGContext *s)
+{
+    /* fail safe */
+    if ((1 << CPU_TLB_ENTRY_BITS) != sizeof(CPUTLBEntry))
+        tcg_abort();
+
+    tcg_regset_set32(tcg_target_available_regs[TCG_TYPE_I32], 0,
+                    ((2 << TCG_REG_R14) - 1) & ~(1 << TCG_REG_R8));
+    tcg_regset_set32(tcg_target_call_clobber_regs, 0,
+                    ((2 << TCG_REG_R3) - 1) |
+                    (1 << TCG_REG_R12) | (1 << TCG_REG_R14));
+
+    tcg_regset_clear(s->reserved_regs);
+#ifdef SAVE_LR
+    tcg_regset_set_reg(s->reserved_regs, TCG_REG_R14);
+#endif
+    tcg_regset_set_reg(s->reserved_regs, TCG_REG_CALL_STACK);
+    tcg_regset_set_reg(s->reserved_regs, TCG_REG_R8);
+
+    tcg_add_target_add_op_defs(arm_op_defs);
+}
+
+static inline void tcg_out_ld(TCGContext *s, TCGType type, int arg,
+                int arg1, tcg_target_long arg2)
+{
+    tcg_out_ld32u(s, COND_AL, arg, arg1, arg2);
+}
+
+static inline void tcg_out_st(TCGContext *s, TCGType type, int arg,
+                int arg1, tcg_target_long arg2)
+{
+    tcg_out_st32(s, COND_AL, arg, arg1, arg2);
+}
+
+void tcg_out_addi(TCGContext *s, int reg, tcg_target_long val)
+{
+    if (val > 0)
+        if (val < 0x100)
+            tcg_out_dat_imm(s, COND_AL, ARITH_ADD, reg, reg, val);
+        else
+            tcg_abort();
+    else if (val < 0) {
+        if (val > -0x100)
+            tcg_out_dat_imm(s, COND_AL, ARITH_SUB, reg, reg, -val);
+        else
+            tcg_abort();
+    }
+}
+
+static inline void tcg_out_mov(TCGContext *s, int ret, int arg)
+{
+    tcg_out_dat_reg(s, COND_AL, ARITH_MOV, ret, 0, arg, SHIFT_IMM_LSL(0));
+}
+
+static inline void tcg_out_movi(TCGContext *s, TCGType type,
+                int ret, tcg_target_long arg)
+{
+    tcg_out_movi32(s, COND_AL, ret, arg);
+}
+
+void tcg_target_qemu_prologue(TCGContext *s)
+{
+    /* stmdb sp!, { r9 - r11, lr } */
+    tcg_out32(s, (COND_AL << 28) | 0x092d4e00);
+
+    tcg_out_bx(s, COND_AL, TCG_REG_R0);
+    tb_ret_addr = s->code_ptr;
+
+    /* ldmia sp!, { r9 - r11, pc } */
+    tcg_out32(s, (COND_AL << 28) | 0x08bd8e00);
+}
diff --git a/tcg/arm/tcg-target.h b/tcg/arm/tcg-target.h
new file mode 100644
index 0000000000..39c779a5b7
--- /dev/null
+++ b/tcg/arm/tcg-target.h
@@ -0,0 +1,73 @@
+/*
+ * Tiny Code Generator for QEMU
+ *
+ * Copyright (c) 2008 Fabrice Bellard
+ * Copyright (c) 2008 Andrzej Zaborowski
+ *
+ * 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.
+ */
+#define TCG_TARGET_ARM 1
+
+#define TCG_TARGET_REG_BITS 32
+#undef TCG_TARGET_WORDS_BIGENDIAN
+#undef TCG_TARGET_HAS_div_i32
+#undef TCG_TARGET_HAS_div_i64
+#undef TCG_TARGET_HAS_bswap_i32
+#define TCG_TARGET_HAS_ext8s_i32
+#define TCG_TARGET_HAS_ext16s_i32
+#undef TCG_TARGET_STACK_GROWSUP
+
+enum {
+    TCG_REG_R0 = 0,
+    TCG_REG_R1,
+    TCG_REG_R2,
+    TCG_REG_R3,
+    TCG_REG_R4,
+    TCG_REG_R5,
+    TCG_REG_R6,
+    TCG_REG_R7,
+    TCG_REG_R8,
+    TCG_REG_R9,
+    TCG_REG_R10,
+    TCG_REG_R11,
+    TCG_REG_R12,
+    TCG_REG_R13,
+    TCG_REG_R14,
+    TCG_TARGET_NB_REGS
+};
+
+/* used for function call generation */
+#define TCG_REG_CALL_STACK	TCG_REG_R13
+#define TCG_TARGET_STACK_ALIGN	8
+
+enum {
+    /* Note: must be synced with dyngen-exec.h */
+    TCG_AREG0 = TCG_REG_R7,
+    TCG_AREG1 = TCG_REG_R4,
+    TCG_AREG2 = TCG_REG_R5,
+    TCG_AREG3 = TCG_REG_R6,
+};
+
+static inline void flush_icache_range(unsigned long start, unsigned long stop)
+{
+    register unsigned long _beg __asm ("a1") = start;
+    register unsigned long _end __asm ("a2") = stop;
+    register unsigned long _flg __asm ("a3") = 0;
+    __asm __volatile__ ("swi 0x9f0002" : : "r" (_beg), "r" (_end), "r" (_flg));
+}