From d51491a60ccf9ab91eb963ba07be2e590afda71d Mon Sep 17 00:00:00 2001
From: Dong Weiyu <cidentifier@yahoo.com.cn>
Date: Fri, 22 Jan 2010 23:10:43 +0800
Subject: [PATCH] Porting TCG to alpha platform

---
 cpu-all.h              |    2 +-
 tcg/alpha/tcg-target.c | 1081 ++++++++++++++++++++++++++++++++++++++++++++++++
 tcg/alpha/tcg-target.h |   68 +++
 3 files changed, 1150 insertions(+), 1 deletions(-)
 create mode 100644 tcg/alpha/tcg-target.c
 create mode 100644 tcg/alpha/tcg-target.h

diff --git a/cpu-all.h b/cpu-all.h
index e0c3efd..bdf6fb2 100644
--- a/cpu-all.h
+++ b/cpu-all.h
@@ -22,7 +22,7 @@
 
 #include "qemu-common.h"
 
-#if defined(__arm__) || defined(__sparc__) || defined(__mips__) || defined(__hppa__)
+#if defined(__arm__) || defined(__sparc__) || defined(__mips__) || defined(__hppa__) || defined(__alpha__)
 #define WORDS_ALIGNED
 #endif
 
diff --git a/tcg/alpha/tcg-target.c b/tcg/alpha/tcg-target.c
new file mode 100644
index 0000000..977c9b1
--- /dev/null
+++ b/tcg/alpha/tcg-target.c
@@ -0,0 +1,1081 @@
+/*
+ * Tiny Code Generator for QEMU on ALPHA platform
+*/
+
+#ifndef NDEBUG
+static const char * const tcg_target_reg_names[TCG_TARGET_NB_REGS] = {
+    "$0", "$1", "$2", "$3", "$4", "$5", "$6", "$7",
+    "$8", "$9", "$10", "$11", "$12", "$13", "$14", "$15",
+    "$16", "$17", "$18", "$19", "$20", "$21", "$22", "$23",
+    "$24", "$25", "$26", "$27", "$28", "$29", "$30", "$31",
+};
+#endif
+
+/* 
+ * $26, $27, $29, $30, $31 are special, reserved, 
+ * $28 is reserved as temporary register.
+*/
+static const int tcg_target_reg_alloc_order[] = {
+    TCG_REG_9, TCG_REG_10, TCG_REG_11, TCG_REG_12, TCG_REG_13, TCG_REG_14,
+    TCG_REG_1, TCG_REG_2, TCG_REG_3, TCG_REG_4, TCG_REG_5, TCG_REG_6,
+    TCG_REG_7, TCG_REG_8, TCG_REG_22, TCG_REG_23, TCG_REG_24, TCG_REG_25,
+    TCG_REG_16, TCG_REG_17, TCG_REG_18, TCG_REG_19, TCG_REG_20, TCG_REG_21
+};
+
+/*
+ * according to alpha calling convention, these 6 registers are used for 
+ * function parameter passing. if function has more than 6 parameters, remained
+ * ones are stored on stack.
+*/
+static const int tcg_target_call_iarg_regs[6] = { 
+    TCG_REG_16, TCG_REG_17, TCG_REG_18, TCG_REG_19, TCG_REG_20, TCG_REG_21
+};
+
+/*
+ * according to alpha calling convention, $0 is used for returning function result.
+*/
+static const int tcg_target_call_oarg_regs[1] = { TCG_REG_0 };
+
+/*
+ * save the address of TB's epilogue.
+*/
+static uint8_t *tb_ret_addr;
+
+#define INSN_OP(x)     (((x) & 0x3f) << 26)
+#define INSN_FUNC1(x)  (((x) & 0x3) << 14)
+#define INSN_FUNC2(x)  (((x) & 0x7f) << 5)
+#define INSN_RA(x)     (((x) & 0x1f) << 21)
+#define INSN_RB(x)     (((x) & 0x1f) << 16)
+#define INSN_RC(x)     ((x) & 0x1f)
+#define INSN_LIT(x)    (((x) & 0xff) << 13)
+#define INSN_DISP16(x) ((x) & 0xffff)
+#define INSN_DISP21(x) ((x) & 0x1fffff)
+#define INSN_RSVED(x)  ((x) & 0x3fff)
+
+#define INSN_JMP       (INSN_OP(0x1a) | INSN_FUNC1(0))
+#define INSN_CALL      (INSN_OP(0x1a) | INSN_FUNC1(1))
+#define INSN_RET       (INSN_OP(0x1a) | INSN_FUNC1(2))
+#define INSN_BR        INSN_OP(0x30)
+#define INSN_BEQ       INSN_OP(0x39)
+#define INSN_BNE       INSN_OP(0x3d)
+#define INSN_BLBC      INSN_OP(0x38)
+#define INSN_BLBS      INSN_OP(0x3c)
+#define INSN_ADDL      (INSN_OP(0x10) | INSN_FUNC2(0))
+#define INSN_SUBL      (INSN_OP(0x10) | INSN_FUNC2(0x9))
+#define INSN_ADDQ      (INSN_OP(0x10) | INSN_FUNC2(0x20))
+#define INSN_SUBQ      (INSN_OP(0x10) | INSN_FUNC2(0x29))
+#define INSN_CMPEQ     (INSN_OP(0x10) | INSN_FUNC2(0x2d))
+#define INSN_CMPLT     (INSN_OP(0x10) | INSN_FUNC2(0x4d))
+#define INSN_CMPLE     (INSN_OP(0x10) | INSN_FUNC2(0x6d))
+#define INSN_CMPULT    (INSN_OP(0x10) | INSN_FUNC2(0x1d))
+#define INSN_CMPULE    (INSN_OP(0x10) | INSN_FUNC2(0x3d))
+#define INSN_MULL      (INSN_OP(0x13) | INSN_FUNC2(0))
+#define INSN_MULQ      (INSN_OP(0x13) | INSN_FUNC2(0x20))
+#define INSN_AND       (INSN_OP(0x11) | INSN_FUNC2(0))
+#define INSN_BIS       (INSN_OP(0x11) | INSN_FUNC2(0x20))
+#define INSN_XOR       (INSN_OP(0x11) | INSN_FUNC2(0x40))
+#define INSN_SLL       (INSN_OP(0x12) | INSN_FUNC2(0x39))
+#define INSN_SRL       (INSN_OP(0x12) | INSN_FUNC2(0x34))
+#define INSN_SRA       (INSN_OP(0x12) | INSN_FUNC2(0x3c))
+#define INSN_ZAPNOT    (INSN_OP(0x12) | INSN_FUNC2(0x31))
+#define INSN_SEXTB     (INSN_OP(0x1c) | INSN_FUNC2(0))
+#define INSN_SEXTW     (INSN_OP(0x1c) | INSN_FUNC2(0x1))
+#define INSN_LDA       INSN_OP(0x8)
+#define INSN_LDAH      INSN_OP(0x9)
+#define INSN_LDBU      INSN_OP(0xa)
+#define INSN_LDWU      INSN_OP(0xc)
+#define INSN_LDL       INSN_OP(0x28)
+#define INSN_LDQ       INSN_OP(0x29)
+#define INSN_STB       INSN_OP(0xe)
+#define INSN_STW       INSN_OP(0xd)
+#define INSN_STL       INSN_OP(0x2c)
+#define INSN_STQ       INSN_OP(0x2d)
+
+/*
+ * return the # of regs used for parameter passing on procedure calling.
+ * note that alpha use $16~$21 to transfer the first 6 paramenters of a procedure.
+*/
+static inline int tcg_target_get_call_iarg_regs_count(int flags)
+{
+    return 6;
+}
+
+/*
+ * given constraint, return available register set. this function is called once
+ * for each op at qemu's initialization stage.
+*/
+static int target_parse_constraint(TCGArgConstraint *ct, const char **pct_str)
+{
+    const char *ct_str = *pct_str;
+
+    switch(ct_str[0]) 
+    {
+    case 'r':
+        /* constaint 'r' means any register is okay */
+        ct->ct |= TCG_CT_REG;
+        tcg_regset_set32(ct->u.regs, 0, 0xffffffffu);
+        break;
+
+    case 'L':
+        /* constraint for qemu_ld/st */
+        ct->ct |= TCG_CT_REG;
+        tcg_regset_set32(ct->u.regs, 0, 0xffffffffu);
+        tcg_regset_reset_reg(ct->u.regs, TCG_REG_0);
+        tcg_regset_reset_reg(ct->u.regs, TCG_REG_16);
+        tcg_regset_reset_reg(ct->u.regs, TCG_REG_17);
+        tcg_regset_reset_reg(ct->u.regs, TCG_REG_18);
+        break;
+
+    default:
+        return -1;
+    }
+
+    ct_str++;
+    *pct_str = ct_str;
+    return 0;
+}
+
+static inline int tcg_target_const_match( \
+    tcg_target_long val, const TCGArgConstraint *arg_ct)
+{
+    int ct = arg_ct->ct;
+    return (ct & TCG_CT_CONST) ? 1 : 0;
+}
+
+static inline void tcg_out_fmt_br(TCGContext *s, int opc, int ra, int disp)
+{
+    tcg_out32(s, (opc)|INSN_RA(ra)|INSN_DISP21(disp));
+}
+
+static inline void tcg_out_fmt_mem(TCGContext *s, int opc, int ra, int rb, int disp)
+{
+    tcg_out32(s, (opc)|INSN_RA(ra)|INSN_RB(rb)|INSN_DISP16(disp));
+}
+
+static inline void tcg_out_fmt_jmp(TCGContext *s, int opc, int ra, int rb, int rsved)
+{
+    tcg_out32(s, (opc)|INSN_RA(ra)|INSN_RB(rb)|INSN_RSVED(rsved));
+}
+
+static inline void tcg_out_fmt_opr(TCGContext *s, int opc, int ra, int rb, int rc)
+{
+    tcg_out32(s, (opc)|INSN_RA(ra)|INSN_RB(rb)|INSN_RC(rc));
+}
+
+static inline void tcg_out_fmt_opi(TCGContext *s, int opc, int ra, int lit, int rc)
+{
+    tcg_out32(s, (opc)|INSN_RA(ra)|INSN_LIT(lit)|INSN_RC(rc)|(1<<12));
+}
+
+/*
+ * mov from a reg to another
+*/
+static inline void tcg_out_mov(TCGContext *s, int rc, int rb)
+{  
+    if ( rb != rc ) {
+        tcg_out_fmt_opr(s, INSN_BIS, TCG_REG_31, rb, rc);
+    }
+}
+
+static inline int _is_tmp_reg( int r)
+{
+    return (r == TMP_REG1);
+}
+
+static void tcg_out_movi( TCGContext *s, \
+    TCGType type, int ra, tcg_target_long orig)
+{
+    long l0, l1, l2=0, l3=0, extra=0;
+    tcg_target_long val = orig;
+    int rs = TCG_REG_31;
+
+    if ( type == TCG_TYPE_I32)
+        val = (int32_t)val;
+
+    l0 = (int16_t)val;
+    val = (val - l0) >> 16;
+    l1 = (int16_t)val;
+
+    if ( orig >> 31 == -1 || orig >> 31 == 0) {
+        if ( l1 < 0 && orig >= 0) {
+            extra = 0x4000;
+            l1 = (int16_t)(val - 0x4000);
+        }
+    } else {
+        val = (val - l1) >> 16;
+        l2 = (int16_t)val;
+        val = (val - l2) >> 16;
+        l3 = (int16_t)val;
+        
+        if (l3) {
+            tcg_out_fmt_mem(s, INSN_LDAH, ra, rs, l3);
+            rs = ra;
+        }
+        if (l2) {
+            tcg_out_fmt_mem(s, INSN_LDA, ra, rs, l2);
+            rs = ra;
+        }
+        if ( l3 || l2)
+            tcg_out_fmt_opi(s, INSN_SLL, ra, 32, ra);
+    }
+    
+    if (l1) {
+        tcg_out_fmt_mem(s, INSN_LDAH, ra, rs, l1);
+        rs = ra;
+    }
+    if (extra) {
+        tcg_out_fmt_mem(s, INSN_LDAH, ra, rs, extra);
+        rs = ra;
+    }
+
+    tcg_out_fmt_mem(s, INSN_LDA, ra, rs, l0);
+}
+
+static void tcg_out_ldst( TCGContext *s, \
+    int opc, int ra, int rb, tcg_target_long disp, int sext)
+{
+    if ( _is_tmp_reg(ra) || _is_tmp_reg(rb))
+        tcg_abort();
+
+    if (disp != (int16_t)disp) {
+        tcg_out_movi(s, TCG_TYPE_I64, TMP_REG1, disp);
+        tcg_out_fmt_opr(s, INSN_ADDQ, rb, TMP_REG1, TMP_REG1);
+        tcg_out_fmt_mem(s, opc, ra, TMP_REG1, 0);
+    } else {
+        tcg_out_fmt_mem(s, opc, ra, rb, disp);
+    }
+
+    switch ( opc) {
+    case INSN_STB:
+    case INSN_STW:
+    case INSN_STL:
+    case INSN_STQ:
+        break;
+    case INSN_LDBU:
+        if ( sext)
+            tcg_out_fmt_opr(s, INSN_SEXTB, TCG_REG_31, ra, ra);
+        break;
+    case INSN_LDWU:
+        if ( sext)
+            tcg_out_fmt_opr(s, INSN_SEXTW, TCG_REG_31, ra, ra);
+        break;
+    case INSN_LDL:
+        if ( !sext)
+            tcg_out_fmt_opi(s, INSN_ZAPNOT, ra, 0xf, ra);
+        break;
+    case INSN_LDQ:
+        break;
+    default:
+        tcg_abort();
+    }
+}
+
+static void tcg_out_ld( TCGContext *s, \
+    int type, int ra, int rb, tcg_target_long disp)
+{
+    int opc = ((type == TCG_TYPE_I32) ? INSN_LDL : INSN_LDQ);
+    tcg_out_ldst(s, opc, ra, rb, disp, 1);
+}
+
+static void tcg_out_st( TCGContext *s, \
+    int type, int ra, int rb, tcg_target_long disp)
+{
+    int opc = ((type == TCG_TYPE_I32) ? INSN_STL : INSN_STQ);
+    tcg_out_ldst(s, opc, ra, rb, disp, 0);
+}

+/*
+ * generate arithmatic instruction with immediate. ra is used as both
+ * input and output, and val is used as another input.
+*/
+static inline void tgen_arithi( \
+    TCGContext *s, int opc, int ra, tcg_target_long val)
+{
+    if ( _is_tmp_reg(ra))
+        tcg_abort();
+
+    if (val == (uint8_t)val) {
+        tcg_out_fmt_opi(s, opc, ra, val, ra);
+    } else {
+        tcg_out_movi(s, TCG_TYPE_I64, TMP_REG1, val);
+        tcg_out_fmt_opr(s, opc, ra, TMP_REG1, ra);
+    }
+}
+
+static void tcg_out_addi(TCGContext *s, int reg, tcg_target_long val)
+{
+    if (val != 0)
+        tgen_arithi(s, INSN_ADDQ, reg, val);
+}
+
+static inline void tcg_out_push(TCGContext *s, int reg)
+{
+    tcg_out_fmt_opi(s, INSN_SUBQ, TCG_REG_30, 8, TCG_REG_30);
+    tcg_out_fmt_mem(s, INSN_STQ, reg, TCG_REG_30, 0);
+}
+
+static inline void tcg_out_pop(TCGContext *s, int reg)
+{
+    tcg_out_fmt_mem(s, INSN_LDQ, reg, TCG_REG_30, 0);
+    tcg_out_fmt_opi(s, INSN_ADDQ, TCG_REG_30, 8, TCG_REG_30);
+}
+
+static const uint64_t tcg_cond_to_jcc[10] = {
+    [TCG_COND_EQ] = INSN_CMPEQ,
+    [TCG_COND_NE] = INSN_CMPEQ,
+    [TCG_COND_LT] = INSN_CMPLT,
+    [TCG_COND_GE] = INSN_CMPLT,
+    [TCG_COND_LE] = INSN_CMPLE,
+    [TCG_COND_GT] = INSN_CMPLE,
+    [TCG_COND_LTU] = INSN_CMPULT,
+    [TCG_COND_GEU] = INSN_CMPULT,
+    [TCG_COND_LEU] = INSN_CMPULE,
+    [TCG_COND_GTU] = INSN_CMPULE
+};
+
+static void patch_reloc(uint8_t *x_ptr, int type,
+                        tcg_target_long value,
+                        tcg_target_long addend)
+{
+    uint32_t *code_ptr = (uint32_t *)x_ptr;
+    uint32_t insn = *code_ptr;
+
+    switch (type) {
+    case R_ALPHA_BRADDR:
+        value -= (long)x_ptr + 4;
+        if ((value & 3) || value < -0x400000 || value >= 0x400000) {
+            tcg_abort();
+        }
+        *code_ptr = insn | INSN_DISP21(value >> 2);
+        break;
+
+    default:
+        tcg_abort();
+    }
+}
+
+static void tcg_out_br(TCGContext *s, int opc, int ra, int label_index)
+{
+    TCGLabel *l = &s->labels[label_index];
+    tcg_target_long value;
+
+    if (l->has_value) {
+        value = l->u.value;
+        value -= (long)s->code_ptr + 4;
+        if ((value & 3) || value < -0x400000 || value >= 0x400000) {
+            tcg_abort();
+        }
+        value >>= 2;
+    } else {
+        tcg_out_reloc(s, s->code_ptr, R_ALPHA_BRADDR, label_index, 0);
+        value = 0;
+    }
+    tcg_out_fmt_br(s, opc, ra, value);
+}
+
+static void tcg_out_brcond(TCGContext *s, int cond, \
+    TCGArg arg1, TCGArg arg2, int const_arg2, int label_index)
+{
+    int opc;
+
+    if ( cond < TCG_COND_EQ || cond > TCG_COND_GTU || const_arg2)
+        tcg_abort();
+
+    opc = tcg_cond_to_jcc[cond];
+    tcg_out_fmt_opr(s, opc, arg1, arg2, TMP_REG1);
+
+    opc = (cond & 1) ? INSN_BLBC : INSN_BLBS;
+    tcg_out_br(s, opc, TMP_REG1, label_index);
+}
+
+#if defined(CONFIG_SOFTMMU)
+
+#include "../../softmmu_defs.h"
+
+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 void tcg_out_mov_addr( TCGContext *s, int ret, int addr)
+{
+    tcg_out_mov(s, ret, addr);
+#if TARGET_LONG_BITS == 32
+    /* if VM is of 32-bit arch, clear higher 32-bit of addr */
+    tcg_out_fmt_opi(s, INSN_ZAPNOT, ret, 0x0f, ret);
+#endif
+}
+
+static void tcg_out_qemu_ld(TCGContext *s, const TCGArg *args, int opc)
+{
+    int addr_reg, data_reg, r0, r1, mem_index, s_bits;
+    tcg_target_long val;
+
+#if defined(CONFIG_SOFTMMU)
+    uint8_t *label1_ptr, *label2_ptr;
+#endif
+
+    data_reg = *args++;
+    addr_reg = *args++;
+    mem_index = *args;
+    s_bits = opc & 3;
+
+    r0 = TCG_REG_16;
+    r1 = TCG_REG_17;
+
+#if defined(CONFIG_SOFTMMU)
+
+    tcg_out_mov_addr(s, r1, addr_reg); 
+    tcg_out_mov_addr(s, r0, addr_reg); 
+ 
+    tgen_arithi(s, INSN_AND, r0, TARGET_PAGE_MASK|((1<<s_bits)-1));
+
+    tgen_arithi(s, INSN_SRL, r1, TARGET_PAGE_BITS-CPU_TLB_ENTRY_BITS);
+    tgen_arithi(s, INSN_AND, r1, (CPU_TLB_SIZE-1)<<CPU_TLB_ENTRY_BITS);
+    
+    tgen_arithi(s, INSN_ADDQ, r1, offsetof(CPUState, tlb_table[mem_index][0].addr_read));
+    tcg_out_fmt_opr(s, INSN_ADDQ, r1, TCG_REG_15, r1);
+#if TARGET_LONG_BITS == 32
+    tcg_out_fmt_mem(s, INSN_LDL, TMP_REG1, r1, 0);
+    tcg_out_fmt_opi(s, INSN_ZAPNOT, TMP_REG1, 0x0f, TMP_REG1);
+#else
+    tcg_out_fmt_mem(s, INSN_LDQ, TMP_REG1, r1, 0);
+#endif
+		
+    //
+    // now, r0 contains the page# and TMP_REG1 contains the addr to tlb_entry.addr_read
+    // we below will compare them
+    //
+    tcg_out_fmt_opr(s, INSN_CMPEQ, TMP_REG1, r0, TMP_REG1);
+
+    tcg_out_mov_addr(s, r0, addr_reg);
+
+    //
+    // if equal, we jump to label1. since label1 is not resolved yet, 
+    // we just record a relocation.
+    //
+    label1_ptr = s->code_ptr;
+    s->code_ptr += 4;
+
+    //
+    // here, unequal, TLB-miss.
+    //
+    tcg_out_movi(s, TCG_TYPE_I32, TCG_REG_17, mem_index);
+    tcg_out_movi(s, TCG_TYPE_I64, TCG_REG_27, (tcg_target_long)qemu_ld_helpers[s_bits]);
+    tcg_out_push(s, addr_reg);
+    tcg_out_fmt_jmp(s, INSN_CALL, TCG_REG_26, TCG_REG_27, 0);
+    tcg_out_pop(s, addr_reg);
+	
+    //
+    // after helper function call, the result of ld is saved in $0
+    //
+    switch(opc) {
+    case 0 | 4:
+        tcg_out_fmt_opr(s, INSN_SEXTB, TCG_REG_31, TCG_REG_0, data_reg);
+        break;
+    case 1 | 4:
+        tcg_out_fmt_opr(s, INSN_SEXTW, TCG_REG_31, TCG_REG_0, data_reg);
+        break;
+    case 2 | 4:
+        tcg_out_fmt_opr(s, INSN_ADDL, TCG_REG_0, TCG_REG_31, data_reg);
+        break;
+    case 0:
+        tcg_out_fmt_opi(s, INSN_ZAPNOT, TCG_REG_0, 0x1, data_reg);
+        break;
+    case 1:
+        tcg_out_fmt_opi(s, INSN_ZAPNOT, TCG_REG_0, 0x3, data_reg);
+        break;
+    case 2:
+        tcg_out_fmt_opi(s, INSN_ZAPNOT, TCG_REG_0, 0xf, data_reg);
+        break;
+    case 3:
+        tcg_out_mov(s, data_reg, TCG_REG_0);
+        break;
+    default:
+        tcg_abort();
+        break;
+    }
+
+    //
+    // we have done, jmp to label2. label2 is not resolved yet, 
+    // we record a relocation.
+    //
+    label2_ptr = s->code_ptr;
+    s->code_ptr += 4;
+    
+    // patch jmp to label1
+    val = (s->code_ptr - label1_ptr - 4) >> 2;
+    if ( !(val >= -0x100000 && val < 0x100000)) {
+        tcg_abort();
+    }
+    *(uint32_t *)label1_ptr = (uint32_t) \
+        ( INSN_BNE | ( TMP_REG1 << 21 ) | ( val & 0x1fffff));
+
+    //
+    // if we get here, a TLB entry is hit, r0 contains the guest addr and 
+    // r1 contains the ptr that point to tlb_entry.addr_read. what we should
+    // do is to load the tlb_entry.addend (64-bit on alpha) and add it to 
+    // r0 to get the host VA
+    //
+    tcg_out_movi(s, TCG_TYPE_I64, TMP_REG1, \
+	offsetof(CPUTLBEntry, addend) - offsetof(CPUTLBEntry, addr_read));
+    tcg_out_fmt_opr(s, INSN_ADDQ, r1, TMP_REG1, r1);
+    tcg_out_fmt_mem(s, INSN_LDQ, TMP_REG1, r1, 0);
+    tcg_out_fmt_opr(s, INSN_ADDQ, r0, TMP_REG1, r0);
+	
+#else
+    r0 = addr_reg;
+#endif // endif defined(CONFIG_SOFTMMU)
+
+#ifdef TARGET_WORDS_BIGENDIAN
+    tcg_abort();
+#endif
+
+    //
+    // when we get here, r0 contains the host VA that can be used to access guest PA
+    //
+    switch(opc) {
+    case 0:
+        tcg_out_fmt_mem(s, INSN_LDBU, data_reg, r0, 0);
+        break;
+    case 0 | 4:
+        tcg_out_fmt_mem(s, INSN_LDBU, data_reg, r0, 0);
+        tcg_out_fmt_opr(s, INSN_SEXTB, TCG_REG_31, data_reg, data_reg);
+        break;
+    case 1:
+        tcg_out_fmt_mem(s, INSN_LDWU, data_reg, r0, 0);
+        break;
+    case 1 | 4:
+        tcg_out_fmt_mem(s, INSN_LDWU, data_reg, r0, 0);
+        tcg_out_fmt_opr(s, INSN_SEXTW, TCG_REG_31, data_reg, data_reg);
+        break;
+    case 2:
+        tcg_out_fmt_mem(s, INSN_LDL, data_reg, r0, 0);
+        tcg_out_fmt_opi(s, INSN_ZAPNOT, data_reg, 0xf, data_reg);
+        break;
+    case 2 | 4:
+        tcg_out_fmt_mem(s, INSN_LDL, data_reg, r0, 0);
+        break;
+    case 3:
+        tcg_out_fmt_mem(s, INSN_LDQ, data_reg, r0, 0);
+        break;
+    default:
+        tcg_abort();
+    }
+
+#if defined(CONFIG_SOFTMMU)
+    /* label2: */
+    val = (s->code_ptr - label2_ptr - 4) >> 2;
+    if ( !(val >= -0x100000 && val < 0x100000)) {
+        tcg_abort();
+    }
+    *(uint32_t *)label2_ptr = (uint32_t)( INSN_BR \
+        | ( TCG_REG_31  << 21 ) | ( val & 0x1fffff) );
+#endif
+}
+
+static void tcg_out_qemu_st(TCGContext *s, const TCGArg *args, int opc)
+{
+    int addr_reg, data_reg, r0, r1, mem_index, s_bits;
+    tcg_target_long val;
+
+#if defined(CONFIG_SOFTMMU)
+    uint8_t *label1_ptr, *label2_ptr;
+#endif
+
+    data_reg = *args++;
+    addr_reg = *args++;
+    mem_index = *args;
+    s_bits = opc&3;
+
+    r0 = TCG_REG_16;
+    r1 = TCG_REG_17;
+
+#if defined(CONFIG_SOFTMMU)
+
+    tcg_out_mov_addr(s, r1, addr_reg); 
+    tcg_out_mov_addr(s, r0, addr_reg); 
+
+    tgen_arithi(s, INSN_AND, r0, TARGET_PAGE_MASK | ((1 << s_bits) - 1));
+
+    tgen_arithi(s, INSN_SRL, r1, TARGET_PAGE_BITS - CPU_TLB_ENTRY_BITS);
+    tgen_arithi(s, INSN_AND, r1, (CPU_TLB_SIZE-1) << CPU_TLB_ENTRY_BITS);
+
+    tgen_arithi(s, INSN_ADDQ, r1, offsetof(CPUState, tlb_table[mem_index][0].addr_write));
+    tcg_out_fmt_opr(s, INSN_ADDQ, r1, TCG_REG_15, r1);
+
+#if TARGET_LONG_BITS == 32
+    tcg_out_fmt_mem(s, INSN_LDL, TMP_REG1, r1, 0);
+    tcg_out_fmt_opi(s, INSN_ZAPNOT, TMP_REG1, 0x0f, TMP_REG1);
+#else
+    tcg_out_fmt_mem(s, INSN_LDQ, TMP_REG1, r1, 0);
+#endif
+
+    //
+    // now, r0 contains the page# and TMP_REG1 contains the addr to tlb_entry.addr_read
+    // we below will compare them
+    //    
+    tcg_out_fmt_opr(s, INSN_CMPEQ, TMP_REG1, r0, TMP_REG1);
+
+    tcg_out_mov_addr(s, r0, addr_reg);
+
+    //
+    // if equal, we jump to label1. since label1 is not resolved yet, 
+    // we just record a relocation.
+    //
+    label1_ptr = s->code_ptr;
+    s->code_ptr += 4;
+
+    // here, unequal, TLB-miss, ...
+    tcg_out_mov(s, TCG_REG_17, data_reg);
+    tcg_out_movi(s, TCG_TYPE_I32, TCG_REG_18, mem_index);
+    tcg_out_movi(s, TCG_TYPE_I64, TCG_REG_27, (tcg_target_long)qemu_st_helpers[s_bits]);       
+    tcg_out_push(s, data_reg);
+    tcg_out_push(s, addr_reg);
+    tcg_out_fmt_jmp(s, INSN_CALL, TCG_REG_26, TCG_REG_27, 0);
+    tcg_out_pop(s, addr_reg);
+    tcg_out_pop(s, data_reg);
+
+    //
+    // we have done, jmp to label2. label2 is not resolved yet,
+    // we record a relocation.
+    //
+    label2_ptr = s->code_ptr;
+    s->code_ptr += 4;
+    
+    // patch jmp to label1
+    val = (s->code_ptr - label1_ptr - 4) >> 2;
+    if ( !(val >= -0x100000 && val < 0x100000)) {
+        tcg_abort();
+    }
+    *(uint32_t *)label1_ptr = (uint32_t) \
+        ( INSN_BNE | ( TMP_REG1  << 21 ) | ( val & 0x1fffff));
+
+    //
+    // if we get here, a TLB entry is hit, r0 contains the guest addr and 
+    // r1 contains the ptr that point to tlb_entry.addr_read. what we should
+    // do is to load the tlb_entry.addend (64-bit on alpha) and add it to 
+    // r0 to get the host VA
+    //
+    tcg_out_movi(s, TCG_TYPE_I64, TMP_REG1, \
+        offsetof(CPUTLBEntry, addend) - offsetof(CPUTLBEntry, addr_write));
+    tcg_out_fmt_opr(s, INSN_ADDQ, r1, TMP_REG1, r1);
+    tcg_out_fmt_mem(s, INSN_LDQ, TMP_REG1, r1,  0);
+    tcg_out_fmt_opr(s, INSN_ADDQ, r0, TMP_REG1, r0);
+
+#else
+    r0 = addr_reg;
+#endif
+
+#ifdef TARGET_WORDS_BIGENDIAN
+    tcg_abort();
+#endif
+
+    //
+    // when we get here, r0 contains the host VA that can be used to access guest PA
+    //
+    switch(opc) {
+    case 0:
+        tcg_out_fmt_mem(s, INSN_STB, data_reg, r0, 0);
+        break;
+    case 1:
+        tcg_out_fmt_mem(s, INSN_STW, data_reg, r0, 0);
+        break;
+    case 2:
+        tcg_out_fmt_mem(s, INSN_STL, data_reg, r0, 0);
+        break;
+    case 3:
+        tcg_out_fmt_mem(s, INSN_STQ, data_reg, r0, 0);
+        break;
+    default:
+        tcg_abort();
+    }
+
+#if defined(CONFIG_SOFTMMU)
+    /* patch jmp to label2: */
+    val = (s->code_ptr - label2_ptr - 4) >> 2;
+    if ( !(val >= -0x100000 && val < 0x100000)) {
+        tcg_abort();
+    }
+    *(uint32_t *)label2_ptr = (uint32_t)( INSN_BR \
+        | ( TCG_REG_31  << 21 ) | ( val & 0x1fffff));
+#endif
+}
+
+static inline void tcg_out_op(TCGContext *s, \
+	int opc, const TCGArg *args, const int *const_args)
+{
+    int oc;
+    switch(opc)
+    {
+    case INDEX_op_exit_tb:
+        /*
+         * exit_tb t0, where t0 is always constant and should be returned to engine
+         * since we'll back to engine soon, $0 and $1 will never be used
+        */
+        tcg_out_movi(s, TCG_TYPE_I64, TCG_REG_0, args[0]);
+        tcg_out_movi(s, TCG_TYPE_I64, TMP_REG1, (tcg_target_long)tb_ret_addr);
+   	tcg_out_fmt_jmp(s, INSN_JMP, TCG_REG_31, TMP_REG1, 0);
+        break;
+
+    case INDEX_op_goto_tb:
+        /* goto_tb idx, where idx is constant 0 or 1, indicating the branch # */
+        if (s->tb_jmp_offset) {
+            /* we don't support direct jmp */
+            tcg_abort();
+        } else {
+            tcg_out_movi( s, TCG_TYPE_I64, TMP_REG1, (tcg_target_long)(s->tb_next + args[0]));
+            tcg_out_fmt_mem(s, INSN_LDQ, TMP_REG1, TMP_REG1, 0);
+            tcg_out_fmt_jmp(s, INSN_JMP, TCG_REG_31, TMP_REG1, 0);
+        }
+        s->tb_next_offset[args[0]] = s->code_ptr - s->code_buf;
+        break;
+
+    case INDEX_op_call:
+        if (const_args[0]) {
+            tcg_abort();
+	} else {
+            tcg_out_mov( s, TCG_REG_27, args[0]);
+            tcg_out_fmt_jmp(s, INSN_CALL, TCG_REG_26, args[0], 0);
+        }
+        break;
+
+    case INDEX_op_jmp: 
+        if (const_args[0]) {
+            tcg_abort();
+        } else {
+            tcg_out_fmt_jmp(s, INSN_JMP, TCG_REG_31, args[0], 0);
+        }
+        break;
+
+    case INDEX_op_br:
+        tcg_out_br(s, INSN_BR, TCG_REG_31, args[0]);
+        break;
+
+    case INDEX_op_ld8u_i32: 
+    case INDEX_op_ld8u_i64:
+        tcg_out_ldst( s, INSN_LDBU, args[0], args[1], args[2], 0);
+        break;
+    case INDEX_op_ld8s_i32: 
+    case INDEX_op_ld8s_i64: 
+        tcg_out_ldst( s, INSN_LDBU, args[0], args[1], args[2], 1);
+        break;
+    case INDEX_op_ld16u_i32:
+    case INDEX_op_ld16u_i64:
+        tcg_out_ldst( s, INSN_LDWU, args[0], args[1], args[2], 0);
+        break;
+    case INDEX_op_ld16s_i32:
+    case INDEX_op_ld16s_i64: 
+        tcg_out_ldst( s, INSN_LDWU, args[0], args[1], args[2], 1);
+        break;
+    case INDEX_op_ld32u_i64: 
+        tcg_out_ldst( s, INSN_LDL, args[0], args[1], args[2], 0);
+        break;
+    case INDEX_op_ld_i32:
+    case INDEX_op_ld32s_i64:
+        tcg_out_ldst( s, INSN_LDL, args[0], args[1], args[2], 1);
+        break;
+    case INDEX_op_ld_i64: 
+        tcg_out_ldst( s, INSN_LDQ, args[0], args[1], args[2], 0);
+        break;		
+    case INDEX_op_st8_i32:
+    case INDEX_op_st8_i64: 
+        tcg_out_ldst( s, INSN_STB, args[0], args[1], args[2], 0);
+        break;
+    case INDEX_op_st16_i32:
+    case INDEX_op_st16_i64: 
+        tcg_out_ldst( s, INSN_STW, args[0], args[1], args[2], 0);
+        break;
+    case INDEX_op_st_i32:
+    case INDEX_op_st32_i64:
+        tcg_out_ldst( s, INSN_STL, args[0], args[1], args[2], 0);
+        break;
+    case INDEX_op_st_i64: 
+        tcg_out_ldst( s, INSN_STQ, args[0], args[1], args[2], 0);
+        break;
+
+    case INDEX_op_add_i32: 
+    case INDEX_op_add_i64: 
+        oc = INSN_ADDQ;
+        goto gen_arith;
+    case INDEX_op_sub_i32: 
+    case INDEX_op_sub_i64:
+        oc = INSN_SUBQ;
+        goto gen_arith;
+    case INDEX_op_mul_i32: 
+        oc = INSN_MULL;
+	goto gen_arith;
+    case INDEX_op_mul_i64: 
+        oc = INSN_MULQ;
+        goto gen_arith;
+    case INDEX_op_and_i32:
+    case INDEX_op_and_i64:
+        oc = INSN_AND;
+        goto gen_arith;
+    case INDEX_op_or_i32:
+    case INDEX_op_or_i64: 
+        oc = INSN_BIS;
+        goto gen_arith;
+    case INDEX_op_xor_i32:
+    case INDEX_op_xor_i64:
+        oc = INSN_XOR;
+	goto gen_arith;
+    case INDEX_op_shl_i32:
+    case INDEX_op_shl_i64:
+        oc = INSN_SLL;
+	goto gen_arith;
+    case INDEX_op_shr_i32:
+        tcg_out_fmt_opi(s, INSN_ZAPNOT, args[1], 0x0f, args[1]);
+    case INDEX_op_shr_i64:
+        oc = INSN_SRL;
+        goto gen_arith;
+    case INDEX_op_sar_i32:
+        tcg_out_fmt_opr(s, INSN_ADDL, args[1], TCG_REG_31, args[1]);
+    case INDEX_op_sar_i64:
+        oc = INSN_SRA;
+    gen_arith:
+        if (const_args[2]) {
+            tcg_abort();
+        } else {
+            tcg_out_fmt_opr(s, oc, args[1], args[2], args[0]);
+        }
+        break;
+
+    case INDEX_op_brcond_i32:
+        tcg_out_fmt_opr(s, INSN_ADDL, args[0], TCG_REG_31, args[0]);
+        tcg_out_fmt_opr(s, INSN_ADDL, args[1], TCG_REG_31, args[1]);
+    case INDEX_op_brcond_i64:
+        tcg_out_brcond(s, args[2], args[0], args[1], const_args[1], args[3]);
+        break;
+
+    case INDEX_op_ext8s_i32:
+    case INDEX_op_ext8s_i64:
+        tcg_out_fmt_opr(s, INSN_SEXTB, TCG_REG_31, args[1], args[0]);
+        break;
+    case INDEX_op_ext16s_i32:
+    case INDEX_op_ext16s_i64:
+        tcg_out_fmt_opr(s, INSN_SEXTW, TCG_REG_31, args[1], args[0]);
+        break;
+    case INDEX_op_ext32s_i64:
+        tcg_out_fmt_opr(s, INSN_ADDL, args[1], TCG_REG_31, args[0]);
+        break;
+    
+    case INDEX_op_qemu_ld8u:
+        tcg_out_qemu_ld(s, args, 0);
+        break;
+    case INDEX_op_qemu_ld8s:
+        tcg_out_qemu_ld(s, args, 0 | 4);
+        break;
+    case INDEX_op_qemu_ld16u:
+        tcg_out_qemu_ld(s, args, 1);
+        break;
+    case INDEX_op_qemu_ld16s:
+        tcg_out_qemu_ld(s, args, 1 | 4);
+        break;
+    case INDEX_op_qemu_ld32u:
+        tcg_out_qemu_ld(s, args, 2);
+        break;
+    case INDEX_op_qemu_ld32s:
+        tcg_out_qemu_ld(s, args, 2 | 4);
+        break;
+    case INDEX_op_qemu_ld64:
+        tcg_out_qemu_ld(s, args, 3);
+        break;
+
+    case INDEX_op_qemu_st8:
+        tcg_out_qemu_st(s, args, 0);
+        break;
+    case INDEX_op_qemu_st16:
+        tcg_out_qemu_st(s, args, 1);
+        break;
+    case INDEX_op_qemu_st32:
+        tcg_out_qemu_st(s, args, 2);
+        break;
+    case INDEX_op_qemu_st64:
+        tcg_out_qemu_st(s, args, 3);
+        break;
+
+    case INDEX_op_movi_i32: 
+    case INDEX_op_movi_i64: 
+    case INDEX_op_mov_i32: 
+    case INDEX_op_mov_i64:
+    case INDEX_op_div2_i32:
+    case INDEX_op_divu2_i32:
+    default:
+        tcg_abort();
+    }
+}
+
+static const TCGTargetOpDef alpha_op_defs[] = {
+    { INDEX_op_exit_tb, { } },
+    { INDEX_op_goto_tb, { } },
+    { INDEX_op_call, { "r" } },
+    { INDEX_op_jmp, { "r" } },
+    { 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" } },
+
+    { INDEX_op_add_i32, { "r", "0", "r" } },
+    { INDEX_op_mul_i32, { "r", "0", "r" } },
+    { INDEX_op_sub_i32, { "r", "0", "r" } },
+    { INDEX_op_and_i32, { "r", "0", "r" } },
+    { INDEX_op_or_i32, { "r", "0", "r" } },
+    { INDEX_op_xor_i32, { "r", "0", "r" } },
+
+    { INDEX_op_shl_i32, { "r", "0", "r" } },
+    { INDEX_op_shr_i32, { "r", "0", "r" } },
+    { INDEX_op_sar_i32, { "r", "0", "r" } },
+
+    { INDEX_op_brcond_i32, { "r", "r" } },		
+
+    { INDEX_op_mov_i64, { "r", "r" } },	
+    { INDEX_op_movi_i64, { "r" } },
+    { 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", "0", "r" } },
+    { INDEX_op_mul_i64, { "r", "0", "r" } },
+    { INDEX_op_sub_i64, { "r", "0", "r" } },
+    { INDEX_op_and_i64, { "r", "0", "r" } },
+    { INDEX_op_or_i64, { "r", "0", "r" } },
+    { INDEX_op_xor_i64, { "r", "0", "r" } },
+
+    { INDEX_op_shl_i64, { "r", "0", "r" } },
+    { INDEX_op_shr_i64, { "r", "0", "r" } },
+    { INDEX_op_sar_i64, { "r", "0", "r" } },
+
+    { INDEX_op_brcond_i64, { "r", "r" } },
+
+    { INDEX_op_ext8s_i32, { "r", "r"} },
+    { INDEX_op_ext16s_i32, { "r", "r"} },
+    { INDEX_op_ext8s_i64, { "r", "r"} },
+    { INDEX_op_ext16s_i64, { "r", "r"} },
+    { INDEX_op_ext32s_i64, { "r", "r"} },
+
+    { INDEX_op_qemu_ld8u, { "r", "L" } },
+    { INDEX_op_qemu_ld8s, { "r", "L" } },
+    { INDEX_op_qemu_ld16u, { "r", "L" } },
+    { INDEX_op_qemu_ld16s, { "r", "L" } },
+    { INDEX_op_qemu_ld32u, { "r", "L" } },
+    { INDEX_op_qemu_ld32s, { "r", "L" } },
+    { INDEX_op_qemu_ld64, { "r", "L" } },
+
+    { INDEX_op_qemu_st8, { "L", "L" } },
+    { INDEX_op_qemu_st16, { "L", "L" } },
+    { INDEX_op_qemu_st32, { "L", "L" } },
+    { INDEX_op_qemu_st64, { "L", "L"} },
+    { -1 },
+};
+
+
+static int tcg_target_callee_save_regs[] = {
+    TCG_REG_15,		// used for the global env, so no need to save
+    TCG_REG_9,
+    TCG_REG_10,
+    TCG_REG_11,
+    TCG_REG_12,
+    TCG_REG_13,
+    TCG_REG_14
+};
+
+/*
+ * Generate global QEMU prologue and epilogue code 
+*/
+void tcg_target_qemu_prologue(TCGContext *s)
+{
+    int i, frame_size, push_size, stack_addend;
+   
+    /* TB prologue */
+	
+    /* save TCG_REG_26 */
+    tcg_out_push(s, TCG_REG_26);
+    tcg_out_push(s, TCG_REG_27);
+    tcg_out_push(s, TCG_REG_28);
+    tcg_out_push(s, TCG_REG_29);
+
+    /* save all callee saved registers */
+    for(i = 0; i < ARRAY_SIZE(tcg_target_callee_save_regs); i++) {
+        tcg_out_push(s, tcg_target_callee_save_regs[i]);
+    }
+	
+    /* reserve some stack space */
+    push_size = 8 + (4 + ARRAY_SIZE(tcg_target_callee_save_regs)) * 8;
+    frame_size = push_size + TCG_STATIC_CALL_ARGS_SIZE;
+    frame_size = (frame_size + TCG_TARGET_STACK_ALIGN - 1) & ~(TCG_TARGET_STACK_ALIGN - 1);
+    stack_addend = frame_size - push_size;
+    tgen_arithi(s, INSN_ADDQ, TCG_REG_30, -stack_addend);
+
+    tcg_out_fmt_jmp(s, INSN_JMP, TCG_REG_31, TCG_REG_16, 0);		/* jmp $16 */
+
+    /* TB epilogue */
+    tb_ret_addr = s->code_ptr;
+    tgen_arithi(s, INSN_ADDQ, TCG_REG_30, stack_addend);
+    for(i = ARRAY_SIZE(tcg_target_callee_save_regs) - 1; i >= 0; i--) {
+        tcg_out_pop(s, tcg_target_callee_save_regs[i]);
+    }
+
+    tcg_out_pop(s, TCG_REG_29);
+    tcg_out_pop(s, TCG_REG_28);
+    tcg_out_pop(s, TCG_REG_27);
+    tcg_out_pop(s, TCG_REG_26);
+    tcg_out_fmt_jmp(s, INSN_RET, TCG_REG_31, TCG_REG_26, 0);		/* ret */
+}
+
+
+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, 0xffffffff);
+    tcg_regset_set32(tcg_target_available_regs[TCG_TYPE_I64], 0, 0xffffffff);
+    tcg_regset_set32(tcg_target_call_clobber_regs, 0,
+		(1 << TCG_REG_1  ) | (1 << TCG_REG_2 ) | (1 << TCG_REG_3  ) | (1 << TCG_REG_4 ) |
+		(1 << TCG_REG_5  ) | (1 << TCG_REG_6 ) | (1 << TCG_REG_7  ) | (1 << TCG_REG_8 ) | 
+		(1 << TCG_REG_22) | (1 << TCG_REG_23) | (1 << TCG_REG_24) | (1 << TCG_REG_25) | 
+              (1 << TCG_REG_16) | (1 << TCG_REG_17) | (1 << TCG_REG_18) | (1 << TCG_REG_19) | 
+              (1 << TCG_REG_20) | (1 << TCG_REG_21) | (1 << TCG_REG_0 ));
+
+    //tcg_regset_set32( tcg_target_call_clobber_regs, 0, 0xffffffff);
+    
+    tcg_regset_clear(s->reserved_regs);
+    // $26~$31 not allocated by tcg.c
+    tcg_regset_set_reg(s->reserved_regs, TCG_REG_26);
+    tcg_regset_set_reg(s->reserved_regs, TCG_REG_27);
+    tcg_regset_set_reg(s->reserved_regs, TCG_REG_28);
+    tcg_regset_set_reg(s->reserved_regs, TCG_REG_29);
+    tcg_regset_set_reg(s->reserved_regs, TCG_REG_30);
+    tcg_regset_set_reg(s->reserved_regs, TCG_REG_31);
+
+    tcg_add_target_add_op_defs(alpha_op_defs);
+}
+
diff --git a/tcg/alpha/tcg-target.h b/tcg/alpha/tcg-target.h
new file mode 100644
index 0000000..e5083a5
--- /dev/null
+++ b/tcg/alpha/tcg-target.h
@@ -0,0 +1,68 @@
+/*
+ * Tiny Code Generator for QEMU
+ *
+ * Copyright (c) 2008 Fabrice Bellard
+ *
+ * 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_ALPHA 1
+
+#define TCG_TARGET_REG_BITS 64
+
+#define TCG_TARGET_NB_REGS 32
+
+enum {
+    TCG_REG_0 = 0, TCG_REG_1, TCG_REG_2, TCG_REG_3,
+    TCG_REG_4, TCG_REG_5, TCG_REG_6, TCG_REG_7,
+    TCG_REG_8, TCG_REG_9, TCG_REG_10, TCG_REG_11,
+    TCG_REG_12, TCG_REG_13, TCG_REG_14, TCG_REG_15,
+    TCG_REG_16, TCG_REG_17, TCG_REG_18, TCG_REG_19,
+    TCG_REG_20, TCG_REG_21, TCG_REG_22, TCG_REG_23,
+    TCG_REG_24, TCG_REG_25, TCG_REG_26, TCG_REG_27,
+    TCG_REG_28, TCG_REG_29, TCG_REG_30, TCG_REG_31
+};
+
+/* used for function call generation */
+#define TCG_REG_CALL_STACK TCG_REG_30
+#define TCG_TARGET_STACK_ALIGN 16
+#define TCG_TARGET_CALL_STACK_OFFSET 0
+
+/* we have signed extension instructions */
+#define TCG_TARGET_HAS_ext8s_i32
+#define TCG_TARGET_HAS_ext16s_i32
+#define TCG_TARGET_HAS_ext8s_i64
+#define TCG_TARGET_HAS_ext16s_i64
+#define TCG_TARGET_HAS_ext32s_i64
+
+/* Note: must be synced with dyngen-exec.h */
+#define TCG_AREG0 TCG_REG_15
+#define TCG_AREG1 TCG_REG_9
+#define TCG_AREG2 TCG_REG_10
+#define TCG_AREG3 TCG_REG_11
+#define TCG_AREG4 TCG_REG_12
+#define TCG_AREG5 TCG_REG_13
+#define TCG_AREG6 TCG_REG_14
+
+#define TMP_REG1 TCG_REG_28
+
+static inline void flush_icache_range(unsigned long start, unsigned long stop)
+{
+    __asm__ __volatile__ ("call_pal 0x86");
+}
+
-- 
1.6.3.3

