target-alpha: Move floating-point helpers to fpu_helper.c.

Signed-off-by: Richard Henderson <rth@twiddle.net>
Signed-off-by: Blue Swirl <blauwirbel@gmail.com>

1 files changed, 0 insertions, 812 deletions

diff --git a/target-alpha/op_helper.c b/target-alpha/op_helper.c
index af5fa824d5..6711d998b9 100644
--- a/target-alpha/op_helper.c
+++ b/target-alpha/op_helper.c
@@ -25,8 +25,6 @@
 #include "sysemu.h"
 #include "qemu-timer.h"
 
-#define FP_STATUS (env->fp_status)
-
 /*****************************************************************************/
 /* Exceptions processing helpers */
 
@@ -117,816 +115,6 @@ uint64_t helper_mulqv (uint64_t op1, uint64_t op2)
     return tl;
 }
 
-/* Floating point helpers */
-
-void helper_setroundmode (uint32_t val)
-{
-    set_float_rounding_mode(val, &FP_STATUS);
-}
-
-void helper_setflushzero (uint32_t val)
-{
-    set_flush_to_zero(val, &FP_STATUS);
-}
-
-void helper_fp_exc_clear (void)
-{
-    set_float_exception_flags(0, &FP_STATUS);
-}
-
-uint32_t helper_fp_exc_get (void)
-{
-    return get_float_exception_flags(&FP_STATUS);
-}
-
-/* Raise exceptions for ieee fp insns without software completion.
-   In that case there are no exceptions that don't trap; the mask
-   doesn't apply.  */
-void helper_fp_exc_raise(uint32_t exc, uint32_t regno)
-{
-    if (exc) {
-        uint32_t hw_exc = 0;
-
-        if (exc & float_flag_invalid) {
-            hw_exc |= EXC_M_INV;
-        }
-        if (exc & float_flag_divbyzero) {
-            hw_exc |= EXC_M_DZE;
-        }
-        if (exc & float_flag_overflow) {
-            hw_exc |= EXC_M_FOV;
-        }
-        if (exc & float_flag_underflow) {
-            hw_exc |= EXC_M_UNF;
-        }
-        if (exc & float_flag_inexact) {
-            hw_exc |= EXC_M_INE;
-        }
-
-        arith_excp(env, GETPC(), hw_exc, 1ull << regno);
-    }
-}
-
-/* Raise exceptions for ieee fp insns with software completion.  */
-void helper_fp_exc_raise_s(uint32_t exc, uint32_t regno)
-{
-    if (exc) {
-        env->fpcr_exc_status |= exc;
-
-        exc &= ~env->fpcr_exc_mask;
-        if (exc) {
-            helper_fp_exc_raise(exc, regno);
-        }
-    }
-}
-
-/* Input remapping without software completion.  Handle denormal-map-to-zero
-   and trap for all other non-finite numbers.  */
-uint64_t helper_ieee_input(uint64_t val)
-{
-    uint32_t exp = (uint32_t)(val >> 52) & 0x7ff;
-    uint64_t frac = val & 0xfffffffffffffull;
-
-    if (exp == 0) {
-        if (frac != 0) {
-            /* If DNZ is set flush denormals to zero on input.  */
-            if (env->fpcr_dnz) {
-                val &= 1ull << 63;
-            } else {
-                arith_excp(env, GETPC(), EXC_M_UNF, 0);
-            }
-        }
-    } else if (exp == 0x7ff) {
-        /* Infinity or NaN.  */
-        /* ??? I'm not sure these exception bit flags are correct.  I do
-           know that the Linux kernel, at least, doesn't rely on them and
-           just emulates the insn to figure out what exception to use.  */
-        arith_excp(env, GETPC(), frac ? EXC_M_INV : EXC_M_FOV, 0);
-    }
-    return val;
-}
-
-/* Similar, but does not trap for infinities.  Used for comparisons.  */
-uint64_t helper_ieee_input_cmp(uint64_t val)
-{
-    uint32_t exp = (uint32_t)(val >> 52) & 0x7ff;
-    uint64_t frac = val & 0xfffffffffffffull;
-
-    if (exp == 0) {
-        if (frac != 0) {
-            /* If DNZ is set flush denormals to zero on input.  */
-            if (env->fpcr_dnz) {
-                val &= 1ull << 63;
-            } else {
-                arith_excp(env, GETPC(), EXC_M_UNF, 0);
-            }
-        }
-    } else if (exp == 0x7ff && frac) {
-        /* NaN.  */
-        arith_excp(env, GETPC(), EXC_M_INV, 0);
-    }
-    return val;
-}
-
-/* Input remapping with software completion enabled.  All we have to do
-   is handle denormal-map-to-zero; all other inputs get exceptions as
-   needed from the actual operation.  */
-uint64_t helper_ieee_input_s(uint64_t val)
-{
-    if (env->fpcr_dnz) {
-        uint32_t exp = (uint32_t)(val >> 52) & 0x7ff;
-        if (exp == 0) {
-            val &= 1ull << 63;
-        }
-    }
-    return val;
-}
-
-/* F floating (VAX) */
-static inline uint64_t float32_to_f(float32 fa)
-{
-    uint64_t r, exp, mant, sig;
-    CPU_FloatU a;
-
-    a.f = fa;
-    sig = ((uint64_t)a.l & 0x80000000) << 32;
-    exp = (a.l >> 23) & 0xff;
-    mant = ((uint64_t)a.l & 0x007fffff) << 29;
-
-    if (exp == 255) {
-        /* NaN or infinity */
-        r = 1; /* VAX dirty zero */
-    } else if (exp == 0) {
-        if (mant == 0) {
-            /* Zero */
-            r = 0;
-        } else {
-            /* Denormalized */
-            r = sig | ((exp + 1) << 52) | mant;
-        }
-    } else {
-        if (exp >= 253) {
-            /* Overflow */
-            r = 1; /* VAX dirty zero */
-        } else {
-            r = sig | ((exp + 2) << 52);
-        }
-    }
-
-    return r;
-}
-
-static inline float32 f_to_float32(uint64_t a)
-{
-    uint32_t exp, mant_sig;
-    CPU_FloatU r;
-
-    exp = ((a >> 55) & 0x80) | ((a >> 52) & 0x7f);
-    mant_sig = ((a >> 32) & 0x80000000) | ((a >> 29) & 0x007fffff);
-
-    if (unlikely(!exp && mant_sig)) {
-        /* Reserved operands / Dirty zero */
-        dynamic_excp(env, GETPC(), EXCP_OPCDEC, 0);
-    }
-
-    if (exp < 3) {
-        /* Underflow */
-        r.l = 0;
-    } else {
-        r.l = ((exp - 2) << 23) | mant_sig;
-    }
-
-    return r.f;
-}
-
-uint32_t helper_f_to_memory (uint64_t a)
-{
-    uint32_t r;
-    r =  (a & 0x00001fffe0000000ull) >> 13;
-    r |= (a & 0x07ffe00000000000ull) >> 45;
-    r |= (a & 0xc000000000000000ull) >> 48;
-    return r;
-}
-
-uint64_t helper_memory_to_f (uint32_t a)
-{
-    uint64_t r;
-    r =  ((uint64_t)(a & 0x0000c000)) << 48;
-    r |= ((uint64_t)(a & 0x003fffff)) << 45;
-    r |= ((uint64_t)(a & 0xffff0000)) << 13;
-    if (!(a & 0x00004000))
-        r |= 0x7ll << 59;
-    return r;
-}
-
-/* ??? Emulating VAX arithmetic with IEEE arithmetic is wrong.  We should
-   either implement VAX arithmetic properly or just signal invalid opcode.  */
-
-uint64_t helper_addf (uint64_t a, uint64_t b)
-{
-    float32 fa, fb, fr;
-
-    fa = f_to_float32(a);
-    fb = f_to_float32(b);
-    fr = float32_add(fa, fb, &FP_STATUS);
-    return float32_to_f(fr);
-}
-
-uint64_t helper_subf (uint64_t a, uint64_t b)
-{
-    float32 fa, fb, fr;
-
-    fa = f_to_float32(a);
-    fb = f_to_float32(b);
-    fr = float32_sub(fa, fb, &FP_STATUS);
-    return float32_to_f(fr);
-}
-
-uint64_t helper_mulf (uint64_t a, uint64_t b)
-{
-    float32 fa, fb, fr;
-
-    fa = f_to_float32(a);
-    fb = f_to_float32(b);
-    fr = float32_mul(fa, fb, &FP_STATUS);
-    return float32_to_f(fr);
-}
-
-uint64_t helper_divf (uint64_t a, uint64_t b)
-{
-    float32 fa, fb, fr;
-
-    fa = f_to_float32(a);
-    fb = f_to_float32(b);
-    fr = float32_div(fa, fb, &FP_STATUS);
-    return float32_to_f(fr);
-}
-
-uint64_t helper_sqrtf (uint64_t t)
-{
-    float32 ft, fr;
-
-    ft = f_to_float32(t);
-    fr = float32_sqrt(ft, &FP_STATUS);
-    return float32_to_f(fr);
-}
-
-
-/* G floating (VAX) */
-static inline uint64_t float64_to_g(float64 fa)
-{
-    uint64_t r, exp, mant, sig;
-    CPU_DoubleU a;
-
-    a.d = fa;
-    sig = a.ll & 0x8000000000000000ull;
-    exp = (a.ll >> 52) & 0x7ff;
-    mant = a.ll & 0x000fffffffffffffull;
-
-    if (exp == 2047) {
-        /* NaN or infinity */
-        r = 1; /* VAX dirty zero */
-    } else if (exp == 0) {
-        if (mant == 0) {
-            /* Zero */
-            r = 0;
-        } else {
-            /* Denormalized */
-            r = sig | ((exp + 1) << 52) | mant;
-        }
-    } else {
-        if (exp >= 2045) {
-            /* Overflow */
-            r = 1; /* VAX dirty zero */
-        } else {
-            r = sig | ((exp + 2) << 52);
-        }
-    }
-
-    return r;
-}
-
-static inline float64 g_to_float64(uint64_t a)
-{
-    uint64_t exp, mant_sig;
-    CPU_DoubleU r;
-
-    exp = (a >> 52) & 0x7ff;
-    mant_sig = a & 0x800fffffffffffffull;
-
-    if (!exp && mant_sig) {
-        /* Reserved operands / Dirty zero */
-        dynamic_excp(env, GETPC(), EXCP_OPCDEC, 0);
-    }
-
-    if (exp < 3) {
-        /* Underflow */
-        r.ll = 0;
-    } else {
-        r.ll = ((exp - 2) << 52) | mant_sig;
-    }
-
-    return r.d;
-}
-
-uint64_t helper_g_to_memory (uint64_t a)
-{
-    uint64_t r;
-    r =  (a & 0x000000000000ffffull) << 48;
-    r |= (a & 0x00000000ffff0000ull) << 16;
-    r |= (a & 0x0000ffff00000000ull) >> 16;
-    r |= (a & 0xffff000000000000ull) >> 48;
-    return r;
-}
-
-uint64_t helper_memory_to_g (uint64_t a)
-{
-    uint64_t r;
-    r =  (a & 0x000000000000ffffull) << 48;
-    r |= (a & 0x00000000ffff0000ull) << 16;
-    r |= (a & 0x0000ffff00000000ull) >> 16;
-    r |= (a & 0xffff000000000000ull) >> 48;
-    return r;
-}
-
-uint64_t helper_addg (uint64_t a, uint64_t b)
-{
-    float64 fa, fb, fr;
-
-    fa = g_to_float64(a);
-    fb = g_to_float64(b);
-    fr = float64_add(fa, fb, &FP_STATUS);
-    return float64_to_g(fr);
-}
-
-uint64_t helper_subg (uint64_t a, uint64_t b)
-{
-    float64 fa, fb, fr;
-
-    fa = g_to_float64(a);
-    fb = g_to_float64(b);
-    fr = float64_sub(fa, fb, &FP_STATUS);
-    return float64_to_g(fr);
-}
-
-uint64_t helper_mulg (uint64_t a, uint64_t b)
-{
-    float64 fa, fb, fr;
-
-    fa = g_to_float64(a);
-    fb = g_to_float64(b);
-    fr = float64_mul(fa, fb, &FP_STATUS);
-    return float64_to_g(fr);
-}
-
-uint64_t helper_divg (uint64_t a, uint64_t b)
-{
-    float64 fa, fb, fr;
-
-    fa = g_to_float64(a);
-    fb = g_to_float64(b);
-    fr = float64_div(fa, fb, &FP_STATUS);
-    return float64_to_g(fr);
-}
-
-uint64_t helper_sqrtg (uint64_t a)
-{
-    float64 fa, fr;
-
-    fa = g_to_float64(a);
-    fr = float64_sqrt(fa, &FP_STATUS);
-    return float64_to_g(fr);
-}
-
-
-/* S floating (single) */
-
-/* Taken from linux/arch/alpha/kernel/traps.c, s_mem_to_reg.  */
-static inline uint64_t float32_to_s_int(uint32_t fi)
-{
-    uint32_t frac = fi & 0x7fffff;
-    uint32_t sign = fi >> 31;
-    uint32_t exp_msb = (fi >> 30) & 1;
-    uint32_t exp_low = (fi >> 23) & 0x7f;
-    uint32_t exp;
-
-    exp = (exp_msb << 10) | exp_low;
-    if (exp_msb) {
-        if (exp_low == 0x7f)
-            exp = 0x7ff;
-    } else {
-        if (exp_low != 0x00)
-            exp |= 0x380;
-    }
-
-    return (((uint64_t)sign << 63)
-            | ((uint64_t)exp << 52)
-            | ((uint64_t)frac << 29));
-}
-
-static inline uint64_t float32_to_s(float32 fa)
-{
-    CPU_FloatU a;
-    a.f = fa;
-    return float32_to_s_int(a.l);
-}
-
-static inline uint32_t s_to_float32_int(uint64_t a)
-{
-    return ((a >> 32) & 0xc0000000) | ((a >> 29) & 0x3fffffff);
-}
-
-static inline float32 s_to_float32(uint64_t a)
-{
-    CPU_FloatU r;
-    r.l = s_to_float32_int(a);
-    return r.f;
-}
-
-uint32_t helper_s_to_memory (uint64_t a)
-{
-    return s_to_float32_int(a);
-}
-
-uint64_t helper_memory_to_s (uint32_t a)
-{
-    return float32_to_s_int(a);
-}
-
-uint64_t helper_adds (uint64_t a, uint64_t b)
-{
-    float32 fa, fb, fr;
-
-    fa = s_to_float32(a);
-    fb = s_to_float32(b);
-    fr = float32_add(fa, fb, &FP_STATUS);
-    return float32_to_s(fr);
-}
-
-uint64_t helper_subs (uint64_t a, uint64_t b)
-{
-    float32 fa, fb, fr;
-
-    fa = s_to_float32(a);
-    fb = s_to_float32(b);
-    fr = float32_sub(fa, fb, &FP_STATUS);
-    return float32_to_s(fr);
-}
-
-uint64_t helper_muls (uint64_t a, uint64_t b)
-{
-    float32 fa, fb, fr;
-
-    fa = s_to_float32(a);
-    fb = s_to_float32(b);
-    fr = float32_mul(fa, fb, &FP_STATUS);
-    return float32_to_s(fr);
-}
-
-uint64_t helper_divs (uint64_t a, uint64_t b)
-{
-    float32 fa, fb, fr;
-
-    fa = s_to_float32(a);
-    fb = s_to_float32(b);
-    fr = float32_div(fa, fb, &FP_STATUS);
-    return float32_to_s(fr);
-}
-
-uint64_t helper_sqrts (uint64_t a)
-{
-    float32 fa, fr;
-
-    fa = s_to_float32(a);
-    fr = float32_sqrt(fa, &FP_STATUS);
-    return float32_to_s(fr);
-}
-
-
-/* T floating (double) */
-static inline float64 t_to_float64(uint64_t a)
-{
-    /* Memory format is the same as float64 */
-    CPU_DoubleU r;
-    r.ll = a;
-    return r.d;
-}
-
-static inline uint64_t float64_to_t(float64 fa)
-{
-    /* Memory format is the same as float64 */
-    CPU_DoubleU r;
-    r.d = fa;
-    return r.ll;
-}
-
-uint64_t helper_addt (uint64_t a, uint64_t b)
-{
-    float64 fa, fb, fr;
-
-    fa = t_to_float64(a);
-    fb = t_to_float64(b);
-    fr = float64_add(fa, fb, &FP_STATUS);
-    return float64_to_t(fr);
-}
-
-uint64_t helper_subt (uint64_t a, uint64_t b)
-{
-    float64 fa, fb, fr;
-
-    fa = t_to_float64(a);
-    fb = t_to_float64(b);
-    fr = float64_sub(fa, fb, &FP_STATUS);
-    return float64_to_t(fr);
-}
-
-uint64_t helper_mult (uint64_t a, uint64_t b)
-{
-    float64 fa, fb, fr;
-
-    fa = t_to_float64(a);
-    fb = t_to_float64(b);
-    fr = float64_mul(fa, fb, &FP_STATUS);
-    return float64_to_t(fr);
-}
-
-uint64_t helper_divt (uint64_t a, uint64_t b)
-{
-    float64 fa, fb, fr;
-
-    fa = t_to_float64(a);
-    fb = t_to_float64(b);
-    fr = float64_div(fa, fb, &FP_STATUS);
-    return float64_to_t(fr);
-}
-
-uint64_t helper_sqrtt (uint64_t a)
-{
-    float64 fa, fr;
-
-    fa = t_to_float64(a);
-    fr = float64_sqrt(fa, &FP_STATUS);
-    return float64_to_t(fr);
-}
-
-/* Comparisons */
-uint64_t helper_cmptun (uint64_t a, uint64_t b)
-{
-    float64 fa, fb;
-
-    fa = t_to_float64(a);
-    fb = t_to_float64(b);
-
-    if (float64_unordered_quiet(fa, fb, &FP_STATUS)) {
-        return 0x4000000000000000ULL;
-    } else {
-        return 0;
-    }
-}
-
-uint64_t helper_cmpteq(uint64_t a, uint64_t b)
-{
-    float64 fa, fb;
-
-    fa = t_to_float64(a);
-    fb = t_to_float64(b);
-
-    if (float64_eq_quiet(fa, fb, &FP_STATUS))
-        return 0x4000000000000000ULL;
-    else
-        return 0;
-}
-
-uint64_t helper_cmptle(uint64_t a, uint64_t b)
-{
-    float64 fa, fb;
-
-    fa = t_to_float64(a);
-    fb = t_to_float64(b);
-
-    if (float64_le(fa, fb, &FP_STATUS))
-        return 0x4000000000000000ULL;
-    else
-        return 0;
-}
-
-uint64_t helper_cmptlt(uint64_t a, uint64_t b)
-{
-    float64 fa, fb;
-
-    fa = t_to_float64(a);
-    fb = t_to_float64(b);
-
-    if (float64_lt(fa, fb, &FP_STATUS))
-        return 0x4000000000000000ULL;
-    else
-        return 0;
-}
-
-uint64_t helper_cmpgeq(uint64_t a, uint64_t b)
-{
-    float64 fa, fb;
-
-    fa = g_to_float64(a);
-    fb = g_to_float64(b);
-
-    if (float64_eq_quiet(fa, fb, &FP_STATUS))
-        return 0x4000000000000000ULL;
-    else
-        return 0;
-}
-
-uint64_t helper_cmpgle(uint64_t a, uint64_t b)
-{
-    float64 fa, fb;
-
-    fa = g_to_float64(a);
-    fb = g_to_float64(b);
-
-    if (float64_le(fa, fb, &FP_STATUS))
-        return 0x4000000000000000ULL;
-    else
-        return 0;
-}
-
-uint64_t helper_cmpglt(uint64_t a, uint64_t b)
-{
-    float64 fa, fb;
-
-    fa = g_to_float64(a);
-    fb = g_to_float64(b);
-
-    if (float64_lt(fa, fb, &FP_STATUS))
-        return 0x4000000000000000ULL;
-    else
-        return 0;
-}
-
-/* Floating point format conversion */
-uint64_t helper_cvtts (uint64_t a)
-{
-    float64 fa;
-    float32 fr;
-
-    fa = t_to_float64(a);
-    fr = float64_to_float32(fa, &FP_STATUS);
-    return float32_to_s(fr);
-}
-
-uint64_t helper_cvtst (uint64_t a)
-{
-    float32 fa;
-    float64 fr;
-
-    fa = s_to_float32(a);
-    fr = float32_to_float64(fa, &FP_STATUS);
-    return float64_to_t(fr);
-}
-
-uint64_t helper_cvtqs (uint64_t a)
-{
-    float32 fr = int64_to_float32(a, &FP_STATUS);
-    return float32_to_s(fr);
-}
-
-/* Implement float64 to uint64 conversion without saturation -- we must
-   supply the truncated result.  This behaviour is used by the compiler
-   to get unsigned conversion for free with the same instruction.
-
-   The VI flag is set when overflow or inexact exceptions should be raised.  */
-
-static inline uint64_t helper_cvttq_internal(uint64_t a, int roundmode, int VI)
-{
-    uint64_t frac, ret = 0;
-    uint32_t exp, sign, exc = 0;
-    int shift;
-
-    sign = (a >> 63);
-    exp = (uint32_t)(a >> 52) & 0x7ff;
-    frac = a & 0xfffffffffffffull;
-
-    if (exp == 0) {
-        if (unlikely(frac != 0)) {
-            goto do_underflow;
-        }
-    } else if (exp == 0x7ff) {
-        exc = (frac ? float_flag_invalid : VI ? float_flag_overflow : 0);
-    } else {
-        /* Restore implicit bit.  */
-        frac |= 0x10000000000000ull;
-
-        shift = exp - 1023 - 52;
-        if (shift >= 0) {
-            /* In this case the number is so large that we must shift
-               the fraction left.  There is no rounding to do.  */
-            if (shift < 63) {
-                ret = frac << shift;
-                if (VI && (ret >> shift) != frac) {
-                    exc = float_flag_overflow;
-                }
-            }
-        } else {
-            uint64_t round;
-
-            /* In this case the number is smaller than the fraction as
-               represented by the 52 bit number.  Here we must think
-               about rounding the result.  Handle this by shifting the
-               fractional part of the number into the high bits of ROUND.
-               This will let us efficiently handle round-to-nearest.  */
-            shift = -shift;
-            if (shift < 63) {
-                ret = frac >> shift;
-                round = frac << (64 - shift);
-            } else {
-                /* The exponent is so small we shift out everything.
-                   Leave a sticky bit for proper rounding below.  */
-            do_underflow:
-                round = 1;
-            }
-
-            if (round) {
-                exc = (VI ? float_flag_inexact : 0);
-                switch (roundmode) {
-                case float_round_nearest_even:
-                    if (round == (1ull << 63)) {
-                        /* Fraction is exactly 0.5; round to even.  */
-                        ret += (ret & 1);
-                    } else if (round > (1ull << 63)) {
-                        ret += 1;
-                    }
-                    break;
-                case float_round_to_zero:
-                    break;
-                case float_round_up:
-                    ret += 1 - sign;
-                    break;
-                case float_round_down:
-                    ret += sign;
-                    break;
-                }
-            }
-        }
-        if (sign) {
-            ret = -ret;
-        }
-    }
-    if (unlikely(exc)) {
-        float_raise(exc, &FP_STATUS);
-    }
-
-    return ret;
-}
-
-uint64_t helper_cvttq(uint64_t a)
-{
-    return helper_cvttq_internal(a, FP_STATUS.float_rounding_mode, 1);
-}
-
-uint64_t helper_cvttq_c(uint64_t a)
-{
-    return helper_cvttq_internal(a, float_round_to_zero, 0);
-}
-
-uint64_t helper_cvttq_svic(uint64_t a)
-{
-    return helper_cvttq_internal(a, float_round_to_zero, 1);
-}
-
-uint64_t helper_cvtqt (uint64_t a)
-{
-    float64 fr = int64_to_float64(a, &FP_STATUS);
-    return float64_to_t(fr);
-}
-
-uint64_t helper_cvtqf (uint64_t a)
-{
-    float32 fr = int64_to_float32(a, &FP_STATUS);
-    return float32_to_f(fr);
-}
-
-uint64_t helper_cvtgf (uint64_t a)
-{
-    float64 fa;
-    float32 fr;
-
-    fa = g_to_float64(a);
-    fr = float64_to_float32(fa, &FP_STATUS);
-    return float32_to_f(fr);
-}
-
-uint64_t helper_cvtgq (uint64_t a)
-{
-    float64 fa = g_to_float64(a);
-    return float64_to_int64_round_to_zero(fa, &FP_STATUS);
-}
-
-uint64_t helper_cvtqg (uint64_t a)
-{
-    float64 fr;
-    fr = int64_to_float64(a, &FP_STATUS);
-    return float64_to_g(fr);
-}
-
 /* PALcode support special instructions */
 #if !defined (CONFIG_USER_ONLY)
 void helper_hw_ret (uint64_t a)