[21/52] target-m68k: Reorg flags handling
diff mbox

Message ID 1462392752-17703-22-git-send-email-laurent@vivier.eu
State New
Headers show

Commit Message

Laurent Vivier May 4, 2016, 8:12 p.m. UTC
From: Richard Henderson <rth@twiddle.net>

Separate all ccr bits.  Continue to batch updates via cc_op.

Signed-off-by: Richard Henderson <rth@twiddle.net>

Fix gen_logic_cc() to really extend the size of the result.
Fix gen_get_ccr(): update cc_op as it is used by the helper.

Signed-off-by: Laurent Vivier <laurent@vivier.eu>
---
 target-m68k/cpu.c       |   2 +-
 target-m68k/cpu.h       |  46 +++---
 target-m68k/helper.c    | 402 +++++++++++++++++++++---------------------------
 target-m68k/helper.h    |   6 +-
 target-m68k/op_helper.c |  30 ++--
 target-m68k/qregs.def   |   6 +-
 target-m68k/translate.c | 384 ++++++++++++++++++++-------------------------
 7 files changed, 389 insertions(+), 487 deletions(-)

Comments

Richard Henderson May 6, 2016, 4:51 p.m. UTC | #1
On 05/04/2016 10:12 AM, Laurent Vivier wrote:
> From: Richard Henderson <rth@twiddle.net>
>
> Separate all ccr bits.  Continue to batch updates via cc_op.
>
> Signed-off-by: Richard Henderson <rth@twiddle.net>
>
> Fix gen_logic_cc() to really extend the size of the result.
> Fix gen_get_ccr(): update cc_op as it is used by the helper.
>
> Signed-off-by: Laurent Vivier <laurent@vivier.eu>
> ---
>  target-m68k/cpu.c       |   2 +-
>  target-m68k/cpu.h       |  46 +++---
>  target-m68k/helper.c    | 402 +++++++++++++++++++++---------------------------
>  target-m68k/helper.h    |   6 +-
>  target-m68k/op_helper.c |  30 ++--
>  target-m68k/qregs.def   |   6 +-
>  target-m68k/translate.c | 384 ++++++++++++++++++++-------------------------
>  7 files changed, 389 insertions(+), 487 del


Reviewed-by: Richard Henderson <rth@twiddle.net>


r~

Patch
diff mbox

diff --git a/target-m68k/cpu.c b/target-m68k/cpu.c
index 81f1579..5ea154f 100644
--- a/target-m68k/cpu.c
+++ b/target-m68k/cpu.c
@@ -57,7 +57,7 @@  static void m68k_cpu_reset(CPUState *s)
 #endif
     m68k_switch_sp(env);
     /* ??? FP regs should be initialized to NaN.  */
-    env->cc_op = CC_OP_FLAGS;
+    cpu_m68k_set_ccr(env, 0);
     /* TODO: We should set PC from the interrupt vector.  */
     env->pc = 0;
     tlb_flush(s, 1);
diff --git a/target-m68k/cpu.h b/target-m68k/cpu.h
index 8347d04..9415d2b 100644
--- a/target-m68k/cpu.h
+++ b/target-m68k/cpu.h
@@ -74,9 +74,11 @@  typedef struct CPUM68KState {
 
     /* Condition flags.  */
     uint32_t cc_op;
-    uint32_t cc_dest;
-    uint32_t cc_src;
-    uint32_t cc_x;
+    uint32_t cc_x; /* always 0/1 */
+    uint32_t cc_n; /* in bit 31 (i.e. negative) */
+    uint32_t cc_v; /* in bit 31, unused, or computed from cc_n and cc_v */
+    uint32_t cc_c; /* either 0/1, unused, or computed from cc_n and cc_v */
+    uint32_t cc_z; /* == 0 or unused */
 
     float64 fregs[8];
     float64 fp_result;
@@ -133,27 +135,23 @@  uint32_t cpu_m68k_get_ccr(CPUM68KState *env);
 void cpu_m68k_set_ccr(CPUM68KState *env, uint32_t);
 
 typedef enum {
-    CC_OP_DYNAMIC, /* Use env->cc_op  */
-    CC_OP_FLAGS, /* CC_DEST = CVZN, CC_SRC = unused */
-    CC_OP_LOGICB, /* CC_DEST = result, CC_SRC = unused */
-    CC_OP_LOGICW, /* CC_DEST = result, CC_SRC = unused */
-    CC_OP_LOGIC, /* CC_DEST = result, CC_SRC = unused */
-    CC_OP_ADDB,   /* CC_DEST = result, CC_SRC = source */
-    CC_OP_ADDW,   /* CC_DEST = result, CC_SRC = source */
-    CC_OP_ADD,   /* CC_DEST = result, CC_SRC = source */
-    CC_OP_SUBB,   /* CC_DEST = result, CC_SRC = source */
-    CC_OP_SUBW,   /* CC_DEST = result, CC_SRC = source */
-    CC_OP_SUB,   /* CC_DEST = result, CC_SRC = source */
-    CC_OP_ADDXB,  /* CC_DEST = result, CC_SRC = source */
-    CC_OP_ADDXW,  /* CC_DEST = result, CC_SRC = source */
-    CC_OP_ADDX,  /* CC_DEST = result, CC_SRC = source */
-    CC_OP_SUBXB,  /* CC_DEST = result, CC_SRC = source */
-    CC_OP_SUBXW,  /* CC_DEST = result, CC_SRC = source */
-    CC_OP_SUBX,  /* CC_DEST = result, CC_SRC = source */
-    CC_OP_SHIFTB, /* CC_DEST = result, CC_SRC = carry */
-    CC_OP_SHIFTW, /* CC_DEST = result, CC_SRC = carry */
-    CC_OP_SHIFT, /* CC_DEST = result, CC_SRC = carry */
-    CC_OP_NB,
+    /* Translator only -- use env->cc_op.  */
+    CC_OP_DYNAMIC = -1,
+
+    /* Each flag bit computed into cc_[xcnvz].  */
+    CC_OP_FLAGS,
+
+    /* X in cc_x, C = X, N in cc_n, Z in cc_n, V via cc_n/cc_v.  */
+    CC_OP_ADD,
+    CC_OP_SUB,
+
+    /* X in cc_x, {N,Z,C,V} via cc_n/cc_v.  */
+    CC_OP_CMP,
+
+    /* X in cc_x, C = 0, V = 0, N in cc_n, Z in cc_n.  */
+    CC_OP_LOGIC,
+
+    CC_OP_NB
 } CCOp;
 
 #define CCF_C 0x01
diff --git a/target-m68k/helper.c b/target-m68k/helper.c
index 9c14d6f..8758016 100644
--- a/target-m68k/helper.c
+++ b/target-m68k/helper.c
@@ -131,151 +131,6 @@  void m68k_cpu_init_gdb(M68kCPU *cpu)
     /* TODO: Add [E]MAC registers.  */
 }
 
-static uint32_t cpu_m68k_flush_flags(CPUM68KState *env, int op)
-{
-    int flags;
-    uint32_t src;
-    uint32_t dest;
-    uint32_t tmp;
-
-#define HIGHBIT(type) (1u << (sizeof(type) * 8 - 1))
-
-#define SET_NZ(x, type) do { \
-        if ((type)(x) == 0) { \
-            flags |= CCF_Z; \
-        } else if ((type)(x) < 0) { \
-            flags |= CCF_N; \
-        } \
-    } while (0)
-
-#define SET_FLAGS_SUB(type, utype) do { \
-        SET_NZ(dest, type); \
-        tmp = dest + src; \
-        if ((utype) tmp < (utype) src) { \
-            flags |= CCF_C; \
-        } \
-        if (HIGHBIT(type) & (tmp ^ dest) & (tmp ^ src)) { \
-            flags |= CCF_V; \
-        } \
-    } while (0)
-
-#define SET_FLAGS_ADD(type, utype) do { \
-        SET_NZ(dest, type); \
-        if ((utype) dest < (utype) src) { \
-            flags |= CCF_C; \
-        } \
-        tmp = dest - src; \
-        if (HIGHBIT(type) & (src ^ dest) & ~(tmp ^ src)) { \
-            flags |= CCF_V; \
-        } \
-    } while (0)
-
-#define SET_FLAGS_ADDX(type, utype) do { \
-        SET_NZ(dest, type); \
-        if ((utype) dest <= (utype) src) { \
-            flags |= CCF_C; \
-        } \
-        tmp = dest - src - 1; \
-        if (HIGHBIT(type) & (src ^ dest) & ~(tmp ^ src)) { \
-            flags |= CCF_V; \
-        } \
-    } while (0)
-
-#define SET_FLAGS_SUBX(type, utype) do { \
-        SET_NZ(dest, type); \
-        tmp = dest + src + 1; \
-        if ((utype) tmp <= (utype) src) { \
-            flags |= CCF_C; \
-        } \
-        if (HIGHBIT(type) & (tmp ^ dest) & (tmp ^ src)) { \
-            flags |= CCF_V; \
-        } \
-    } while (0)
-
-#define SET_FLAGS_SHIFT(type) do { \
-    SET_NZ(dest, type); \
-    flags |= src; \
-    } while (0)
-
-    flags = 0;
-    src = env->cc_src;
-    dest = env->cc_dest;
-    switch (op) {
-    case CC_OP_FLAGS:
-        flags = dest;
-        break;
-    case CC_OP_LOGICB:
-        SET_NZ(dest, int8_t);
-        break;
-    case CC_OP_LOGICW:
-        SET_NZ(dest, int16_t);
-        break;
-    case CC_OP_LOGIC:
-        SET_NZ(dest, int32_t);
-        break;
-    case CC_OP_ADDB:
-        SET_FLAGS_ADD(int8_t, uint8_t);
-        break;
-    case CC_OP_ADDW:
-        SET_FLAGS_ADD(int16_t, uint16_t);
-        break;
-    case CC_OP_ADD:
-        SET_FLAGS_ADD(int32_t, uint32_t);
-        break;
-    case CC_OP_SUBB:
-        SET_FLAGS_SUB(int8_t, uint8_t);
-        break;
-    case CC_OP_SUBW:
-        SET_FLAGS_SUB(int16_t, uint16_t);
-        break;
-    case CC_OP_SUB:
-        SET_FLAGS_SUB(int32_t, uint32_t);
-        break;
-    case CC_OP_ADDXB:
-        SET_FLAGS_ADDX(int8_t, uint8_t);
-        break;
-    case CC_OP_ADDXW:
-        SET_FLAGS_ADDX(int16_t, uint16_t);
-        break;
-    case CC_OP_ADDX:
-        SET_FLAGS_ADDX(int32_t, uint32_t);
-        break;
-    case CC_OP_SUBXB:
-        SET_FLAGS_SUBX(int8_t, uint8_t);
-        break;
-    case CC_OP_SUBXW:
-        SET_FLAGS_SUBX(int16_t, uint16_t);
-        break;
-    case CC_OP_SUBX:
-        SET_FLAGS_SUBX(int32_t, uint32_t);
-        break;
-    case CC_OP_SHIFTB:
-        SET_FLAGS_SHIFT(int8_t);
-        break;
-    case CC_OP_SHIFTW:
-        SET_FLAGS_SHIFT(int16_t);
-        break;
-    case CC_OP_SHIFT:
-        SET_FLAGS_SHIFT(int32_t);
-        break;
-    default:
-        g_assert_not_reached();
-    }
-    return flags;
-}
-
-uint32_t cpu_m68k_get_ccr(CPUM68KState *env)
-{
-    return cpu_m68k_flush_flags(env, env->cc_op) | env->cc_x * CCF_X;
-}
-
-void cpu_m68k_set_ccr(CPUM68KState *env, uint32_t val)
-{
-    env->cc_op = CC_OP_FLAGS;
-    env->cc_dest = val & 0xf;
-    env->cc_x = (val & CCF_X ? 1 : 0);
-}
-
 void HELPER(movec)(CPUM68KState *env, uint32_t reg, uint32_t val)
 {
     M68kCPU *cpu = m68k_env_get_cpu(env);
@@ -412,59 +267,52 @@  uint32_t HELPER(ff1)(uint32_t x)
     return n;
 }
 
-uint32_t HELPER(sats)(uint32_t val, uint32_t ccr)
+uint32_t HELPER(sats)(uint32_t val, uint32_t v)
 {
     /* The result has the opposite sign to the original value.  */
-    if (ccr & CCF_V)
+    if ((int32_t)v < 0) {
         val = (((int32_t)val) >> 31) ^ SIGNBIT;
+    }
     return val;
 }
 
 uint32_t HELPER(subx_cc)(CPUM68KState *env, uint32_t op1, uint32_t op2)
 {
-    uint32_t res;
-    uint32_t old_flags;
-    int op;
+    uint32_t res, new_x;
 
-    old_flags = env->cc_dest;
     if (env->cc_x) {
-        env->cc_x = (op1 <= op2);
-        op = CC_OP_SUBX;
+        new_x = (op1 <= op2);
         res = op1 - (op2 + 1);
     } else {
-        env->cc_x = (op1 < op2);
-        op = CC_OP_SUB;
+        new_x = (op1 < op2);
         res = op1 - op2;
     }
-    env->cc_dest = res;
-    env->cc_src = op2;
-    env->cc_dest = cpu_m68k_flush_flags(env, op);
-    /* !Z is sticky.  */
-    env->cc_dest &= (old_flags | ~CCF_Z);
+    env->cc_x = new_x;
+    env->cc_c = new_x;
+    env->cc_n = res;
+    env->cc_z |= res; /* !Z is sticky */
+    env->cc_v = (res ^ op1) & (op1 ^ op2);
+
     return res;
 }
 
 uint32_t HELPER(addx_cc)(CPUM68KState *env, uint32_t op1, uint32_t op2)
 {
-    uint32_t res;
-    uint32_t old_flags;
-    int op;
+    uint32_t res, new_x;
 
-    old_flags = env->cc_dest;
     if (env->cc_x) {
         res = op1 + op2 + 1;
-        env->cc_x = (res <= op2);
-        op = CC_OP_ADDX;
+        new_x = (res <= op2);
     } else {
         res = op1 + op2;
-        env->cc_x = (res < op2);
-        op = CC_OP_ADD;
-    }
-    env->cc_dest = res;
-    env->cc_src = op2;
-    env->cc_dest = cpu_m68k_flush_flags(env, op);
-    /* !Z is sticky.  */
-    env->cc_dest &= (old_flags | ~CCF_Z);
+        new_x = (res < op2);
+    }
+    env->cc_x = new_x;
+    env->cc_c = new_x;
+    env->cc_n = res;
+    env->cc_z |= res; /* !Z is sticky.  */
+    env->cc_v = (res ^ op1) & ~(op1 ^ op2);
+
     return res;
 }
 
@@ -477,73 +325,53 @@  void HELPER(set_sr)(CPUM68KState *env, uint32_t val)
 
 uint32_t HELPER(shl_cc)(CPUM68KState *env, uint32_t val, uint32_t shift)
 {
-    uint32_t result;
-    uint32_t cf;
+    uint64_t result;
 
     shift &= 63;
-    if (shift == 0) {
-        result = val;
-        cf = env->cc_src & CCF_C;
-    } else if (shift < 32) {
-        result = val << shift;
-        cf = (val >> (32 - shift)) & 1;
-    } else if (shift == 32) {
-        result = 0;
-        cf = val & 1;
-    } else /* shift > 32 */ {
-        result = 0;
-        cf = 0;
-    }
-    env->cc_src = cf;
-    env->cc_x = (cf != 0);
-    env->cc_dest = result;
+    result = (uint64_t)val << shift;
+
+    env->cc_c = (result >> 32) & 1;
+    env->cc_n = result;
+    env->cc_z = result;
+    env->cc_v = 0;
+    env->cc_x = shift ? env->cc_c : env->cc_x;
+
     return result;
 }
 
 uint32_t HELPER(shr_cc)(CPUM68KState *env, uint32_t val, uint32_t shift)
 {
+    uint64_t temp;
     uint32_t result;
-    uint32_t cf;
 
     shift &= 63;
-    if (shift == 0) {
-        result = val;
-        cf = env->cc_src & CCF_C;
-    } else if (shift < 32) {
-        result = val >> shift;
-        cf = (val >> (shift - 1)) & 1;
-    } else if (shift == 32) {
-        result = 0;
-        cf = val >> 31;
-    } else /* shift > 32 */ {
-        result = 0;
-        cf = 0;
-    }
-    env->cc_src = cf;
-    env->cc_x = (cf != 0);
-    env->cc_dest = result;
+    temp = (uint64_t)val << 32 >> shift;
+    result = temp >> 32;
+
+    env->cc_c = (temp >> 31) & 1;
+    env->cc_n = result;
+    env->cc_z = result;
+    env->cc_v = 0;
+    env->cc_x = shift ? env->cc_c : env->cc_x;
+
     return result;
 }
 
 uint32_t HELPER(sar_cc)(CPUM68KState *env, uint32_t val, uint32_t shift)
 {
+    uint64_t temp;
     uint32_t result;
-    uint32_t cf;
 
     shift &= 63;
-    if (shift == 0) {
-        result = val;
-        cf = (env->cc_src & CCF_C) != 0;
-    } else if (shift < 32) {
-        result = (int32_t)val >> shift;
-        cf = (val >> (shift - 1)) & 1;
-    } else /* shift >= 32 */ {
-        result = (int32_t)val >> 31;
-        cf = val >> 31;
-    }
-    env->cc_src = cf;
-    env->cc_x = cf;
-    env->cc_dest = result;
+    temp = (int64_t)val << 32 >> shift;
+    result = temp >> 32;
+
+    env->cc_c = (temp >> 31) & 1;
+    env->cc_n = result;
+    env->cc_z = result;
+    env->cc_v = result ^ val;
+    env->cc_x = shift ? env->cc_c : env->cc_x;
+
     return result;
 }
 
@@ -795,9 +623,133 @@  void HELPER(mac_set_flags)(CPUM68KState *env, uint32_t acc)
     }
 }
 
-uint32_t HELPER(flush_flags)(CPUM68KState *env, uint32_t op)
+uint32_t cpu_m68k_get_ccr(CPUM68KState *env)
 {
-    return cpu_m68k_flush_flags(env, op);
+    uint32_t x, c, n, z, v;
+    uint32_t res, src1, src2;
+
+    x = env->cc_x;
+    c = env->cc_c;
+    n = env->cc_n;
+    z = env->cc_z;
+    v = env->cc_v;
+
+    switch (env->cc_op) {
+    case CC_OP_FLAGS:
+        /* Everything in place.  */
+        break;
+
+    case CC_OP_ADD:
+        res = n;
+        src2 = v;
+        src1 = res - src2;
+        c = x;
+        z = n;
+        v = (res ^ src1) & ~(src1 ^ src2);
+        break;
+
+    case CC_OP_SUB:
+        res = n;
+        src2 = v;
+        src1 = res + src2;
+        c = x;
+        z = n;
+        v = (res ^ src1) & (src1 ^ src2);
+        break;
+
+    case CC_OP_CMP:
+        src1 = n;
+        src2 = v;
+        res = src1 - src2;
+        n = res;
+        z = res;
+        c = src1 < src2;
+        v = (res ^ src1) & (src1 ^ src2);
+        break;
+
+    case CC_OP_LOGIC:
+        c = v = 0;
+        z = n;
+        break;
+
+    default:
+        cpu_abort(CPU(m68k_env_get_cpu(env)), "Bad CC_OP %d", env->cc_op);
+    }
+
+    n = n >> 31;
+    v = v >> 31;
+    z = (z == 0);
+
+    return x*CCF_X + n*CCF_N + z*CCF_Z + v*CCF_V + c*CCF_C;
+}
+
+uint32_t HELPER(get_ccr)(CPUM68KState *env)
+{
+    return cpu_m68k_get_ccr(env);
+}
+
+void cpu_m68k_set_ccr(CPUM68KState *env, uint32_t ccr)
+{
+    env->cc_x = (ccr & CCF_X ? 1 : 0);
+    env->cc_n = (ccr & CCF_N ? -1 : 0);
+    env->cc_z = (ccr & CCF_Z ? 0 : 1);
+    env->cc_v = (ccr & CCF_V ? -1 : 0);
+    env->cc_c = (ccr & CCF_C ? 1 : 0);
+    env->cc_op = CC_OP_FLAGS;
+}
+
+void HELPER(set_ccr)(CPUM68KState *env, uint32_t ccr)
+{
+    cpu_m68k_set_ccr(env, ccr);
+}
+
+void HELPER(flush_flags)(CPUM68KState *env, uint32_t cc_op)
+{
+    uint32_t res, src1, src2;
+
+    switch (cc_op) {
+    case CC_OP_FLAGS:
+        /* Everything up to date.  */
+        return;
+
+    case CC_OP_ADD:
+        res = env->cc_n;
+        src2 = env->cc_v;
+        src1 = res - src2;
+        env->cc_z = res;
+        env->cc_c = env->cc_x;
+        env->cc_v = (res ^ src1) & ~(src1 ^ src2);
+        break;
+
+    case CC_OP_SUB:
+        res = env->cc_n;
+        src2 = env->cc_v;
+        src1 = res + src2;
+        env->cc_z = res;
+        env->cc_c = env->cc_x;
+        env->cc_v = (res ^ src1) & (src1 ^ src2);
+        break;
+
+    case CC_OP_CMP:
+        src1 = env->cc_n;
+        src2 = env->cc_v;
+        res = src1 - src2;
+        env->cc_n = res;
+        env->cc_z = res;
+        env->cc_c = src1 < src2;
+        env->cc_v = (res ^ src1) & (src1 ^ src2);
+        break;
+
+    case CC_OP_LOGIC:
+        env->cc_c = 0;
+        env->cc_v = 0;
+        env->cc_z = env->cc_n;
+        break;
+
+    default:
+        cpu_abort(CPU(m68k_env_get_cpu(env)), "Bad CC_OP %d", cc_op);
+    }
+    env->cc_op = CC_OP_FLAGS;
 }
 
 uint32_t HELPER(get_macf)(CPUM68KState *env, uint64_t val)
diff --git a/target-m68k/helper.h b/target-m68k/helper.h
index 0f5a7cf..c868148 100644
--- a/target-m68k/helper.h
+++ b/target-m68k/helper.h
@@ -1,6 +1,6 @@ 
 DEF_HELPER_1(bitrev, i32, i32)
 DEF_HELPER_1(ff1, i32, i32)
-DEF_HELPER_2(sats, i32, i32, i32)
+DEF_HELPER_FLAGS_2(sats, TCG_CALL_NO_RWG_SE, i32, i32, i32)
 DEF_HELPER_2(divu, void, env, i32)
 DEF_HELPER_2(divs, void, env, i32)
 DEF_HELPER_3(addx_cc, i32, env, i32, i32)
@@ -45,5 +45,7 @@  DEF_HELPER_3(set_mac_extf, void, env, i32, i32)
 DEF_HELPER_3(set_mac_exts, void, env, i32, i32)
 DEF_HELPER_3(set_mac_extu, void, env, i32, i32)
 
-DEF_HELPER_2(flush_flags, i32, env, i32)
+DEF_HELPER_2(flush_flags, void, env, i32)
+DEF_HELPER_2(set_ccr, void, env, i32)
+DEF_HELPER_FLAGS_1(get_ccr, TCG_CALL_NO_WG_SE, i32, env)
 DEF_HELPER_2(raise_exception, void, env, i32)
diff --git a/target-m68k/op_helper.c b/target-m68k/op_helper.c
index 9262946..1c95ea0 100644
--- a/target-m68k/op_helper.c
+++ b/target-m68k/op_helper.c
@@ -184,7 +184,6 @@  void HELPER(divu)(CPUM68KState *env, uint32_t word)
     uint32_t den;
     uint32_t quot;
     uint32_t rem;
-    uint32_t flags;
 
     num = env->div1;
     den = env->div2;
@@ -194,16 +193,14 @@  void HELPER(divu)(CPUM68KState *env, uint32_t word)
     }
     quot = num / den;
     rem = num % den;
-    flags = 0;
-    if (word && quot > 0xffff)
-        flags |= CCF_V;
-    if (quot == 0)
-        flags |= CCF_Z;
-    else if ((int32_t)quot < 0)
-        flags |= CCF_N;
+
+    env->cc_v = (word && quot > 0xffff ? -1 : 0);
+    env->cc_z = quot;
+    env->cc_n = quot;
+    env->cc_c = 0;
+
     env->div1 = quot;
     env->div2 = rem;
-    env->cc_dest = flags;
 }
 
 void HELPER(divs)(CPUM68KState *env, uint32_t word)
@@ -212,7 +209,6 @@  void HELPER(divs)(CPUM68KState *env, uint32_t word)
     int32_t den;
     int32_t quot;
     int32_t rem;
-    int32_t flags;
 
     num = env->div1;
     den = env->div2;
@@ -221,14 +217,12 @@  void HELPER(divs)(CPUM68KState *env, uint32_t word)
     }
     quot = num / den;
     rem = num % den;
-    flags = 0;
-    if (word && quot != (int16_t)quot)
-        flags |= CCF_V;
-    if (quot == 0)
-        flags |= CCF_Z;
-    else if (quot < 0)
-        flags |= CCF_N;
+
+    env->cc_v = (word && quot != (int16_t)quot ? -1 : 0);
+    env->cc_z = quot;
+    env->cc_n = quot;
+    env->cc_c = 0;
+
     env->div1 = quot;
     env->div2 = rem;
-    env->cc_dest = flags;
 }
diff --git a/target-m68k/qregs.def b/target-m68k/qregs.def
index 204663e..156c0f5 100644
--- a/target-m68k/qregs.def
+++ b/target-m68k/qregs.def
@@ -2,9 +2,11 @@  DEFF64(FP_RESULT, fp_result)
 DEFO32(PC, pc)
 DEFO32(SR, sr)
 DEFO32(CC_OP, cc_op)
-DEFO32(CC_DEST, cc_dest)
-DEFO32(CC_SRC, cc_src)
 DEFO32(CC_X, cc_x)
+DEFO32(CC_C, cc_c)
+DEFO32(CC_N, cc_n)
+DEFO32(CC_V, cc_v)
+DEFO32(CC_Z, cc_z)
 DEFO32(DIV1, div1)
 DEFO32(DIV2, div2)
 DEFO32(MACSR, macsr)
diff --git a/target-m68k/translate.c b/target-m68k/translate.c
index 37c1b95..c3d7318 100644
--- a/target-m68k/translate.c
+++ b/target-m68k/translate.c
@@ -132,6 +132,7 @@  typedef struct DisasContext {
     target_ulong pc;
     int is_jmp;
     CCOp cc_op; /* Current CC operation */
+    int cc_op_synced;
     int user;
     uint32_t fpcr;
     struct TranslationBlock *tb;
@@ -173,49 +174,44 @@  typedef void (*disas_proc)(CPUM68KState *env, DisasContext *s, uint16_t insn);
                              uint16_t insn)
 #endif
 
-enum {
-    USES_CC_DST  = 1,
-    USES_CC_SRC  = 2,
-};
-
 static const uint8_t cc_op_live[CC_OP_NB] = {
-    [CC_OP_DYNAMIC] = USES_CC_DST | USES_CC_SRC,
-    [CC_OP_FLAGS] = USES_CC_DST,
-    [CC_OP_LOGICB ... CC_OP_LOGIC] = USES_CC_DST,
-    [CC_OP_ADDB ... CC_OP_ADD] = USES_CC_DST | USES_CC_SRC,
-    [CC_OP_SUBB ... CC_OP_SUB] = USES_CC_DST | USES_CC_SRC,
-    [CC_OP_ADDXB ... CC_OP_ADDX] = USES_CC_DST | USES_CC_SRC,
-    [CC_OP_SUBXB ... CC_OP_SUBX] = USES_CC_DST | USES_CC_SRC,
-    [CC_OP_SHIFTB ... CC_OP_SHIFT] = USES_CC_DST | USES_CC_SRC,
+    [CC_OP_FLAGS] = CCF_C | CCF_V | CCF_Z | CCF_N | CCF_X,
+    [CC_OP_ADD] = CCF_X | CCF_N | CCF_V,
+    [CC_OP_SUB] = CCF_X | CCF_N | CCF_V,
+    [CC_OP_CMP] = CCF_X | CCF_N | CCF_V,
+    [CC_OP_LOGIC] = CCF_X | CCF_N
 };
 
 static void set_cc_op(DisasContext *s, CCOp op)
 {
+    CCOp old_op = s->cc_op;
     int dead;
 
-    if (s->cc_op == op) {
+    if (old_op == op) {
         return;
     }
+    s->cc_op = op;
+    s->cc_op_synced = 0;
 
-    /* Discard CC computation that will no longer be used.  */
-
-    dead = cc_op_live[s->cc_op] & ~cc_op_live[op];
-    if (dead & USES_CC_DST) {
-        tcg_gen_discard_i32(QREG_CC_DEST);
+    /* Discard CC computation that will no longer be used.
+       Note that X and N are never dead.  */
+    dead = cc_op_live[old_op] & ~cc_op_live[op];
+    if (dead & CCF_C) {
+        tcg_gen_discard_i32(QREG_CC_C);
     }
-    if (dead & USES_CC_SRC) {
-        tcg_gen_discard_i32(QREG_CC_SRC);
+    if (dead & CCF_Z) {
+        tcg_gen_discard_i32(QREG_CC_Z);
     }
-    if (s->cc_op == CC_OP_DYNAMIC) {
-        tcg_gen_discard_i32(QREG_CC_OP);
+    if (dead & CCF_V) {
+        tcg_gen_discard_i32(QREG_CC_V);
     }
-    s->cc_op = op;
 }
 
 /* Update the CPU env CC_OP state.  */
-static inline void update_cc_op(DisasContext *s)
+static void update_cc_op(DisasContext *s)
 {
-    if (s->cc_op != CC_OP_DYNAMIC) {
+    if (!s->cc_op_synced) {
+        s->cc_op_synced = 1;
         tcg_gen_movi_i32(QREG_CC_OP, s->cc_op);
     }
 }
@@ -458,41 +454,79 @@  static TCGv gen_lea_indexed(CPUM68KState *env, DisasContext *s, TCGv base)
 
 /* Evaluate all the CC flags.  */
 
-static inline void gen_flush_flags(DisasContext *s)
+static void gen_flush_flags(DisasContext *s)
 {
-    if (s->cc_op == CC_OP_FLAGS)
+    TCGv tmp;
+
+    switch (s->cc_op) {
+    case CC_OP_FLAGS:
         return;
-    if (s->cc_op == CC_OP_DYNAMIC) {
-        gen_helper_flush_flags(QREG_CC_DEST, cpu_env, QREG_CC_OP);
-    } else {
-        gen_helper_flush_flags(QREG_CC_DEST, cpu_env, tcg_const_i32(s->cc_op));
+    case CC_OP_DYNAMIC:
+        gen_helper_flush_flags(cpu_env, QREG_CC_OP);
+        break;
+    default:
+        tmp = tcg_const_i32(s->cc_op);
+        gen_helper_flush_flags(cpu_env, tmp);
+        tcg_temp_free(tmp);
+        break;
     }
-    set_cc_op(s, CC_OP_FLAGS);
+
+    /* Note that flush_flags also assigned to env->cc_op.  */
+    s->cc_op = CC_OP_FLAGS;
+    s->cc_op_synced = 1;
 }
 
-#define SET_CC_OP(opsize, op) do { \
-    switch (opsize) { \
-    case OS_BYTE: \
-        set_cc_op(s, CC_OP_##op##B); break; \
-    case OS_WORD: \
-        set_cc_op(s, CC_OP_##op##W); break; \
-    case OS_LONG: \
-        set_cc_op(s, CC_OP_##op); break; \
-    default: \
-        abort(); \
-    } \
-} while (0)
+/* Sign or zero extend a value.  */
+
+static inline void gen_ext(TCGv res, TCGv val, int opsize, int sign)
+{
+    switch (opsize) {
+    case OS_BYTE:
+        if (sign) {
+            tcg_gen_ext8s_i32(res, val);
+        } else {
+            tcg_gen_ext8u_i32(res, val);
+        }
+        break;
+    case OS_WORD:
+        if (sign) {
+            tcg_gen_ext16s_i32(res, val);
+        } else {
+            tcg_gen_ext16u_i32(res, val);
+        }
+        break;
+    case OS_LONG:
+        tcg_gen_mov_i32(res, val);
+        break;
+    default:
+        g_assert_not_reached();
+    }
+}
+
+static TCGv gen_extend(TCGv val, int opsize, int sign)
+{
+    TCGv tmp;
+
+    if (opsize == OS_LONG) {
+        tmp = val;
+    } else {
+        tmp = tcg_temp_new();
+        gen_ext(tmp, val, opsize, sign);
+    }
+
+    return tmp;
+}
 
 static void gen_logic_cc(DisasContext *s, TCGv val, int opsize)
 {
-    tcg_gen_mov_i32(QREG_CC_DEST, val);
-    SET_CC_OP(opsize, LOGIC);
+    gen_ext(QREG_CC_N, val, opsize, 1);
+    set_cc_op(s, CC_OP_LOGIC);
 }
 
 static void gen_update_cc_add(TCGv dest, TCGv src)
 {
-    tcg_gen_mov_i32(QREG_CC_DEST, dest);
-    tcg_gen_mov_i32(QREG_CC_SRC, src);
+    tcg_gen_mov_i32(QREG_CC_N, dest);
+    tcg_gen_mov_i32(QREG_CC_V, src);
 }
 
 static inline int opsize_bytes(int opsize)
@@ -547,36 +581,6 @@  static void gen_partset_reg(int opsize, TCGv reg, TCGv val)
     }
 }
 
-/* Sign or zero extend a value.  */
-static inline TCGv gen_extend(TCGv val, int opsize, int sign)
-{
-    TCGv tmp;
-
-    switch (opsize) {
-    case OS_BYTE:
-        tmp = tcg_temp_new();
-        if (sign)
-            tcg_gen_ext8s_i32(tmp, val);
-        else
-            tcg_gen_ext8u_i32(tmp, val);
-        break;
-    case OS_WORD:
-        tmp = tcg_temp_new();
-        if (sign)
-            tcg_gen_ext16s_i32(tmp, val);
-        else
-            tcg_gen_ext16u_i32(tmp, val);
-        break;
-    case OS_LONG:
-    case OS_SINGLE:
-        tmp = val;
-        break;
-    default:
-        g_assert_not_reached();
-    }
-    return tmp;
-}
-
 /* Generate code for an "effective address".  Does not adjust the base
    register for autoincrement addressing modes.  */
 static TCGv gen_lea(CPUM68KState *env, DisasContext *s, uint16_t insn,
@@ -755,7 +759,8 @@  static TCGv gen_ea(CPUM68KState *env, DisasContext *s, uint16_t insn,
 /* This generates a conditional branch, clobbering all temporaries.  */
 static void gen_jmpcc(DisasContext *s, int cond, TCGLabel *l1)
 {
-    TCGv tmp;
+    TCGv tmp, tmp2;
+    TCGCond tcond;
 
     /* TODO: Optimize compare/branch pairs rather than always flushing
        flag state to CC_OP_FLAGS.  */
@@ -764,97 +769,57 @@  static void gen_jmpcc(DisasContext *s, int cond, TCGLabel *l1)
     switch (cond) {
     case 0: /* T */
         tcg_gen_br(l1);
-        break;
+        return;
     case 1: /* F */
-        break;
-    case 2: /* HI (!C && !Z) */
-        tmp = tcg_temp_new();
-        tcg_gen_andi_i32(tmp, QREG_CC_DEST, CCF_C | CCF_Z);
-        tcg_gen_brcondi_i32(TCG_COND_EQ, tmp, 0, l1);
-        break;
+        return;
+    case 2: /* HI (!C && !Z) -> !(C || Z)*/
     case 3: /* LS (C || Z) */
         tmp = tcg_temp_new();
-        tcg_gen_andi_i32(tmp, QREG_CC_DEST, CCF_C | CCF_Z);
-        tcg_gen_brcondi_i32(TCG_COND_NE, tmp, 0, l1);
+        tcg_gen_setcondi_i32(TCG_COND_EQ, tmp, QREG_CC_Z, 0);
+        tcg_gen_or_i32(tmp, tmp, QREG_CC_C);
+        tcond = (cond & 1 ? TCG_COND_NE: TCG_COND_EQ);
         break;
     case 4: /* CC (!C) */
-        tmp = tcg_temp_new();
-        tcg_gen_andi_i32(tmp, QREG_CC_DEST, CCF_C);
-        tcg_gen_brcondi_i32(TCG_COND_EQ, tmp, 0, l1);
-        break;
     case 5: /* CS (C) */
-        tmp = tcg_temp_new();
-        tcg_gen_andi_i32(tmp, QREG_CC_DEST, CCF_C);
-        tcg_gen_brcondi_i32(TCG_COND_NE, tmp, 0, l1);
+        tmp = QREG_CC_C;
+        tcond = (cond & 1 ? TCG_COND_NE : TCG_COND_EQ);
         break;
     case 6: /* NE (!Z) */
-        tmp = tcg_temp_new();
-        tcg_gen_andi_i32(tmp, QREG_CC_DEST, CCF_Z);
-        tcg_gen_brcondi_i32(TCG_COND_EQ, tmp, 0, l1);
-        break;
     case 7: /* EQ (Z) */
-        tmp = tcg_temp_new();
-        tcg_gen_andi_i32(tmp, QREG_CC_DEST, CCF_Z);
-        tcg_gen_brcondi_i32(TCG_COND_NE, tmp, 0, l1);
+        tmp = QREG_CC_Z;
+        tcond = (cond & 1 ? TCG_COND_EQ : TCG_COND_NE);
         break;
     case 8: /* VC (!V) */
-        tmp = tcg_temp_new();
-        tcg_gen_andi_i32(tmp, QREG_CC_DEST, CCF_V);
-        tcg_gen_brcondi_i32(TCG_COND_EQ, tmp, 0, l1);
-        break;
     case 9: /* VS (V) */
-        tmp = tcg_temp_new();
-        tcg_gen_andi_i32(tmp, QREG_CC_DEST, CCF_V);
-        tcg_gen_brcondi_i32(TCG_COND_NE, tmp, 0, l1);
+        tmp = QREG_CC_V;
+        tcond = (cond & 1 ? TCG_COND_LT : TCG_COND_GE);
         break;
     case 10: /* PL (!N) */
-        tmp = tcg_temp_new();
-        tcg_gen_andi_i32(tmp, QREG_CC_DEST, CCF_N);
-        tcg_gen_brcondi_i32(TCG_COND_EQ, tmp, 0, l1);
-        break;
     case 11: /* MI (N) */
-        tmp = tcg_temp_new();
-        tcg_gen_andi_i32(tmp, QREG_CC_DEST, CCF_N);
-        tcg_gen_brcondi_i32(TCG_COND_NE, tmp, 0, l1);
+        tmp = QREG_CC_N;
+        tcond = (cond & 1 ? TCG_COND_LT : TCG_COND_GE);
         break;
     case 12: /* GE (!(N ^ V)) */
-        tmp = tcg_temp_new();
-        assert(CCF_V == (CCF_N >> 2));
-        tcg_gen_shri_i32(tmp, QREG_CC_DEST, 2);
-        tcg_gen_xor_i32(tmp, tmp, QREG_CC_DEST);
-        tcg_gen_andi_i32(tmp, tmp, CCF_V);
-        tcg_gen_brcondi_i32(TCG_COND_EQ, tmp, 0, l1);
-        break;
     case 13: /* LT (N ^ V) */
         tmp = tcg_temp_new();
-        assert(CCF_V == (CCF_N >> 2));
-        tcg_gen_shri_i32(tmp, QREG_CC_DEST, 2);
-        tcg_gen_xor_i32(tmp, tmp, QREG_CC_DEST);
-        tcg_gen_andi_i32(tmp, tmp, CCF_V);
-        tcg_gen_brcondi_i32(TCG_COND_NE, tmp, 0, l1);
+        tcg_gen_xor_i32(tmp, QREG_CC_N, QREG_CC_V);
+        tcond = (cond & 1 ? TCG_COND_LT : TCG_COND_GE);
         break;
     case 14: /* GT (!(Z || (N ^ V))) */
-        tmp = tcg_temp_new();
-        assert(CCF_V == (CCF_N >> 2));
-        tcg_gen_andi_i32(tmp, QREG_CC_DEST, CCF_N);
-        tcg_gen_shri_i32(tmp, tmp, 2);
-        tcg_gen_xor_i32(tmp, tmp, QREG_CC_DEST);
-        tcg_gen_andi_i32(tmp, tmp, CCF_V | CCF_Z);
-        tcg_gen_brcondi_i32(TCG_COND_EQ, tmp, 0, l1);
-        break;
     case 15: /* LE (Z || (N ^ V)) */
         tmp = tcg_temp_new();
-        assert(CCF_V == (CCF_N >> 2));
-        tcg_gen_andi_i32(tmp, QREG_CC_DEST, CCF_N);
-        tcg_gen_shri_i32(tmp, tmp, 2);
-        tcg_gen_xor_i32(tmp, tmp, QREG_CC_DEST);
-        tcg_gen_andi_i32(tmp, tmp, CCF_V | CCF_Z);
-        tcg_gen_brcondi_i32(TCG_COND_NE, tmp, 0, l1);
+        tcg_gen_setcondi_i32(TCG_COND_EQ, tmp, QREG_CC_Z, 0);
+        tcg_gen_neg_i32(tmp, tmp);
+        tmp2 = tcg_temp_new();
+        tcg_gen_xor_i32(tmp2, QREG_CC_N, QREG_CC_V);
+        tcg_gen_or_i32(tmp, tmp, tmp2);
+        tcond = (cond & 1 ? TCG_COND_LT : TCG_COND_GE);
         break;
     default:
         /* Should ever happen.  */
         abort();
     }
+  tcg_gen_brcondi_i32(tcond, tmp, 0, l1);
 }
 
 DISAS_INSN(scc)
@@ -1012,6 +977,7 @@  DISAS_INSN(divw)
     tcg_gen_ext16u_i32(tmp, QREG_DIV1);
     tcg_gen_shli_i32(src, QREG_DIV2, 16);
     tcg_gen_or_i32(reg, tmp, src);
+
     set_cc_op(s, CC_OP_FLAGS);
 }
 
@@ -1107,42 +1073,43 @@  DISAS_INSN(bitop_reg)
     else
         opsize = OS_LONG;
     op = (insn >> 6) & 3;
+
+    gen_flush_flags(s);
+
     SRC_EA(env, src1, opsize, 0, op ? &addr: NULL);
     src2 = DREG(insn, 9);
     dest = tcg_temp_new();
 
-    gen_flush_flags(s);
     tmp = tcg_temp_new();
     if (opsize == OS_BYTE)
         tcg_gen_andi_i32(tmp, src2, 7);
     else
         tcg_gen_andi_i32(tmp, src2, 31);
-    src2 = tmp;
-    tmp = tcg_temp_new();
-    tcg_gen_shr_i32(tmp, src1, src2);
-    tcg_gen_andi_i32(tmp, tmp, 1);
-    tcg_gen_shli_i32(tmp, tmp, 2);
-    /* Clear CCF_Z if bit set.  */
-    tcg_gen_ori_i32(QREG_CC_DEST, QREG_CC_DEST, CCF_Z);
-    tcg_gen_xor_i32(QREG_CC_DEST, QREG_CC_DEST, tmp);
-
-    tcg_gen_shl_i32(tmp, tcg_const_i32(1), src2);
+
+    src2 = tcg_const_i32(1);
+    tcg_gen_shl_i32(src2, src2, tmp);
+    tcg_temp_free(tmp);
+
+    tcg_gen_and_i32(QREG_CC_Z, src1, src2);
+
     switch (op) {
     case 1: /* bchg */
-        tcg_gen_xor_i32(dest, src1, tmp);
+        tcg_gen_xor_i32(dest, src1, src2);
         break;
     case 2: /* bclr */
-        tcg_gen_not_i32(tmp, tmp);
-        tcg_gen_and_i32(dest, src1, tmp);
+        tcg_gen_andc_i32(dest, src1, src2);
         break;
     case 3: /* bset */
-        tcg_gen_or_i32(dest, src1, tmp);
+        tcg_gen_or_i32(dest, src1, src2);
         break;
     default: /* btst */
         break;
     }
-    if (op)
+    tcg_temp_free(src2);
+    if (op) {
         DEST_EA(env, insn, opsize, dest, &addr);
+    }
+    tcg_temp_free(dest);
 }
 
 DISAS_INSN(sats)
@@ -1150,7 +1117,7 @@  DISAS_INSN(sats)
     TCGv reg;
     reg = DREG(insn, 0);
     gen_flush_flags(s);
-    gen_helper_sats(reg, reg, QREG_CC_DEST);
+    gen_helper_sats(reg, reg, QREG_CC_V);
     gen_logic_cc(s, reg, OS_LONG);
 }
 
@@ -1222,28 +1189,20 @@  DISAS_INSN(bitop_im)
         return;
     }
 
+    gen_flush_flags(s);
+
     SRC_EA(env, src1, opsize, 0, op ? &addr: NULL);
 
-    gen_flush_flags(s);
     if (opsize == OS_BYTE)
         bitnum &= 7;
     else
         bitnum &= 31;
     mask = 1 << bitnum;
 
-    tmp = tcg_temp_new();
-    assert (CCF_Z == (1 << 2));
-    if (bitnum > 2)
-        tcg_gen_shri_i32(tmp, src1, bitnum - 2);
-    else if (bitnum < 2)
-        tcg_gen_shli_i32(tmp, src1, 2 - bitnum);
-    else
-        tcg_gen_mov_i32(tmp, src1);
-    tcg_gen_andi_i32(tmp, tmp, CCF_Z);
-    /* Clear CCF_Z if bit set.  */
-    tcg_gen_ori_i32(QREG_CC_DEST, QREG_CC_DEST, CCF_Z);
-    tcg_gen_xor_i32(QREG_CC_DEST, QREG_CC_DEST, tmp);
+    tcg_gen_andi_i32(QREG_CC_Z, src1, mask);
+
     if (op) {
+        tmp = tcg_temp_new();
         switch (op) {
         case 1: /* bchg */
             tcg_gen_xori_i32(tmp, src1, mask);
@@ -1258,8 +1217,10 @@  DISAS_INSN(bitop_im)
             break;
         }
         DEST_EA(env, insn, opsize, tmp, &addr);
+        tcg_temp_free(tmp);
     }
 }
+
 DISAS_INSN(arith_im)
 {
     int op;
@@ -1283,7 +1244,7 @@  DISAS_INSN(arith_im)
         break;
     case 2: /* subi */
         tcg_gen_mov_i32(dest, src1);
-        tcg_gen_setcond_i32(TCG_COND_LTU, QREG_CC_X, dest, tcg_const_i32(im));
+        tcg_gen_setcondi_i32(TCG_COND_LTU, QREG_CC_X, dest, im);
         tcg_gen_subi_i32(dest, dest, im);
         gen_update_cc_add(dest, tcg_const_i32(im));
         set_cc_op(s, CC_OP_SUB);
@@ -1292,7 +1253,7 @@  DISAS_INSN(arith_im)
         tcg_gen_mov_i32(dest, src1);
         tcg_gen_addi_i32(dest, dest, im);
         gen_update_cc_add(dest, tcg_const_i32(im));
-        tcg_gen_setcond_i32(TCG_COND_LTU, QREG_CC_X, dest, tcg_const_i32(im));
+        tcg_gen_setcondi_i32(TCG_COND_LTU, QREG_CC_X, dest, im);
         set_cc_op(s, CC_OP_ADD);
         break;
     case 5: /* eori */
@@ -1300,10 +1261,8 @@  DISAS_INSN(arith_im)
         gen_logic_cc(s, dest, OS_LONG);
         break;
     case 6: /* cmpi */
-        tcg_gen_mov_i32(dest, src1);
-        tcg_gen_subi_i32(dest, dest, im);
-        gen_update_cc_add(dest, tcg_const_i32(im));
-        set_cc_op(s, CC_OP_SUB);
+        gen_update_cc_add(src1, tcg_const_i32(im));
+        set_cc_op(s, CC_OP_CMP);
         break;
     default:
         abort();
@@ -1395,9 +1354,9 @@  static TCGv gen_get_ccr(DisasContext *s)
     TCGv dest;
 
     gen_flush_flags(s);
+    update_cc_op(s);
     dest = tcg_temp_new();
-    tcg_gen_shli_i32(dest, QREG_CC_X, 4);
-    tcg_gen_or_i32(dest, dest, QREG_CC_DEST);
+    gen_helper_get_ccr(dest, cpu_env);
     return dest;
 }
 
@@ -1419,37 +1378,39 @@  DISAS_INSN(neg)
     tcg_gen_mov_i32(src1, reg);
     tcg_gen_neg_i32(reg, src1);
     gen_update_cc_add(reg, src1);
-    tcg_gen_setcond_i32(TCG_COND_LTU, QREG_CC_X, tcg_const_i32(0), src1);
+    tcg_gen_setcondi_i32(TCG_COND_NE, QREG_CC_X, src1, 0);
     set_cc_op(s, CC_OP_SUB);
 }
 
 static void gen_set_sr_im(DisasContext *s, uint16_t val, int ccr_only)
 {
-    tcg_gen_movi_i32(QREG_CC_DEST, val & 0xf);
-    tcg_gen_movi_i32(QREG_CC_X, (val & 0x10) >> 4);
-    if (!ccr_only) {
-        gen_helper_set_sr(cpu_env, tcg_const_i32(val & 0xff00));
+    if (ccr_only) {
+        tcg_gen_movi_i32(QREG_CC_C, val & CCF_C ? 1 : 0);
+        tcg_gen_movi_i32(QREG_CC_V, val & CCF_V ? -1 : 0);
+        tcg_gen_movi_i32(QREG_CC_Z, val & CCF_Z ? 0 : 1);
+        tcg_gen_movi_i32(QREG_CC_N, val & CCF_N ? -1 : 0);
+        tcg_gen_movi_i32(QREG_CC_X, val & CCF_X ? 1 : 0);
+    } else {
+        gen_helper_set_sr(cpu_env, tcg_const_i32(val));
     }
     set_cc_op(s, CC_OP_FLAGS);
 }
 
 static void gen_set_sr(DisasContext *s, TCGv val, int ccr_only)
 {
-    TCGv tmp;
-    tmp = tcg_temp_new();
-    tcg_gen_andi_i32(QREG_CC_DEST, val, 0xf);
-    tcg_gen_shri_i32(tmp, val, 4);
-    tcg_gen_andi_i32(QREG_CC_X, tmp, 1);
-    if (!ccr_only) {
+    if (ccr_only) {
+        gen_helper_set_ccr(cpu_env, val);
+    } else {
         gen_helper_set_sr(cpu_env, val);
     }
+    set_cc_op(s, CC_OP_FLAGS);
 }
 
 static void gen_move_to_sr(CPUM68KState *env, DisasContext *s, uint16_t insn,
                            int ccr_only)
 {
     TCGv src;
-    s->cc_op = CC_OP_FLAGS;
+
     SRC_EA(env, src, OS_WORD, 0, NULL);
     gen_set_sr(s, src, ccr_only);
 }
@@ -1666,10 +1627,10 @@  DISAS_INSN(addsubq)
         src2 = tcg_const_i32(val);
         if (insn & 0x0100) {
             tcg_gen_setcond_i32(TCG_COND_LTU, QREG_CC_X, dest, src2);
-            tcg_gen_subi_i32(dest, dest, val);
+            tcg_gen_sub_i32(dest, dest, src2);
             set_cc_op(s, CC_OP_SUB);
         } else {
-            tcg_gen_addi_i32(dest, dest, val);
+            tcg_gen_add_i32(dest, dest, src2);
             tcg_gen_setcond_i32(TCG_COND_LTU, QREG_CC_X, dest, src2);
             set_cc_op(s, CC_OP_ADD);
         }
@@ -1713,18 +1674,16 @@  DISAS_INSN(branch)
         /* bsr */
         gen_push(s, tcg_const_i32(s->pc));
     }
+    update_cc_op(s);
     if (op > 1) {
         /* Bcc */
         l1 = gen_new_label();
         gen_jmpcc(s, ((insn >> 8) & 0xf) ^ 1, l1);
-        update_cc_op(s);
         gen_jmp_tb(s, 1, base + offset);
         gen_set_label(l1);
-        update_cc_op(s);
         gen_jmp_tb(s, 0, s->pc);
     } else {
         /* Unconditional branch.  */
-        update_cc_op(s);
         gen_jmp_tb(s, 0, base + offset);
     }
 }
@@ -1813,16 +1772,13 @@  DISAS_INSN(cmp)
 {
     TCGv src;
     TCGv reg;
-    TCGv dest;
     int opsize;
 
     opsize = insn_opsize(insn);
     SRC_EA(env, src, opsize, -1, NULL);
     reg = DREG(insn, 9);
-    dest = tcg_temp_new();
-    tcg_gen_sub_i32(dest, reg, src);
-    gen_update_cc_add(dest, src);
-    SET_CC_OP(opsize, SUB);
+    gen_update_cc_add(reg, src);
+    set_cc_op(s, CC_OP_CMP);
 }
 
 DISAS_INSN(cmpa)
@@ -1830,7 +1786,6 @@  DISAS_INSN(cmpa)
     int opsize;
     TCGv src;
     TCGv reg;
-    TCGv dest;
 
     if (insn & 0x100) {
         opsize = OS_LONG;
@@ -1839,10 +1794,8 @@  DISAS_INSN(cmpa)
     }
     SRC_EA(env, src, opsize, 1, NULL);
     reg = AREG(insn, 9);
-    dest = tcg_temp_new();
-    tcg_gen_sub_i32(dest, reg, src);
-    gen_update_cc_add(dest, src);
-    SET_CC_OP(OS_LONG, SUB);
+    gen_update_cc_add(reg, src);
+    set_cc_op(s, CC_OP_CMP);
 }
 
 DISAS_INSN(eor)
@@ -1909,6 +1862,8 @@  DISAS_INSN(shift_im)
     int tmp;
     TCGv shift;
 
+    set_cc_op(s, CC_OP_FLAGS);
+
     reg = DREG(insn, 0);
     tmp = (insn >> 9) & 7;
     if (tmp == 0)
@@ -1924,7 +1879,6 @@  DISAS_INSN(shift_im)
             gen_helper_sar_cc(reg, cpu_env, reg, shift);
         }
     }
-    set_cc_op(s, CC_OP_SHIFT);
 }
 
 DISAS_INSN(shift_reg)
@@ -1934,8 +1888,6 @@  DISAS_INSN(shift_reg)
 
     reg = DREG(insn, 0);
     shift = DREG(insn, 9);
-    /* Shift by zero leaves C flag unmodified.   */
-    gen_flush_flags(s);
     if (insn & 0x100) {
         gen_helper_shl_cc(reg, cpu_env, reg, shift);
     } else {
@@ -1945,7 +1897,7 @@  DISAS_INSN(shift_reg)
             gen_helper_sar_cc(reg, cpu_env, reg, shift);
         }
     }
-    set_cc_op(s, CC_OP_SHIFT);
+    set_cc_op(s, CC_OP_FLAGS);
 }
 
 DISAS_INSN(ff1)
@@ -2755,9 +2707,10 @@  DISAS_INSN(from_mext)
 
 DISAS_INSN(macsr_to_ccr)
 {
-    tcg_gen_movi_i32(QREG_CC_X, 0);
-    tcg_gen_andi_i32(QREG_CC_DEST, QREG_MACSR, 0xf);
-    set_cc_op(s, CC_OP_FLAGS);
+    TCGv tmp = tcg_temp_new();
+    tcg_gen_andi_i32(tmp, QREG_MACSR, 0xf);
+    gen_set_sr(s, tmp, 1);
+    tcg_temp_free(tmp);
 }
 
 DISAS_INSN(to_mac)
@@ -3041,6 +2994,7 @@  void gen_intermediate_code(CPUM68KState *env, TranslationBlock *tb)
     dc->is_jmp = DISAS_NEXT;
     dc->pc = pc_start;
     dc->cc_op = CC_OP_DYNAMIC;
+    dc->cc_op_synced = 1;
     dc->singlestep_enabled = cs->singlestep_enabled;
     dc->fpcr = env->fpcr;
     dc->user = (env->sr & SR_S) == 0;