Commit f3d3aad4 authored by Richard Henderson's avatar Richard Henderson
Browse files

target-alpha: Tidy FPCR representation



Store the fpcr as the hardware represents it.  Convert the softfpu
representation of exceptions into the fpcr representation.

Signed-off-by: default avatarRichard Henderson <rth@twiddle.net>
parent ba9c5de5
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+47 −48
Original line number Diff line number Diff line
@@ -150,28 +150,28 @@ enum {
    FP_ROUND_DYNAMIC = 0x3,
};

/* FPCR bits */
#define FPCR_SUM		(1ULL << 63)
#define FPCR_INED		(1ULL << 62)
#define FPCR_UNFD		(1ULL << 61)
#define FPCR_UNDZ		(1ULL << 60)
#define FPCR_DYN_SHIFT		58
#define FPCR_DYN_CHOPPED	(0ULL << FPCR_DYN_SHIFT)
#define FPCR_DYN_MINUS		(1ULL << FPCR_DYN_SHIFT)
#define FPCR_DYN_NORMAL		(2ULL << FPCR_DYN_SHIFT)
#define FPCR_DYN_PLUS		(3ULL << FPCR_DYN_SHIFT)
#define FPCR_DYN_MASK		(3ULL << FPCR_DYN_SHIFT)
#define FPCR_IOV		(1ULL << 57)
#define FPCR_INE		(1ULL << 56)
#define FPCR_UNF		(1ULL << 55)
#define FPCR_OVF		(1ULL << 54)
#define FPCR_DZE		(1ULL << 53)
#define FPCR_INV		(1ULL << 52)
#define FPCR_OVFD		(1ULL << 51)
#define FPCR_DZED		(1ULL << 50)
#define FPCR_INVD		(1ULL << 49)
#define FPCR_DNZ		(1ULL << 48)
#define FPCR_DNOD		(1ULL << 47)
/* FPCR bits -- right-shifted 32 so we can use a uint32_t.  */
#define FPCR_SUM                (1U << (63 - 32))
#define FPCR_INED               (1U << (62 - 32))
#define FPCR_UNFD               (1U << (61 - 32))
#define FPCR_UNDZ               (1U << (60 - 32))
#define FPCR_DYN_SHIFT          (58 - 32)
#define FPCR_DYN_CHOPPED        (0U << FPCR_DYN_SHIFT)
#define FPCR_DYN_MINUS          (1U << FPCR_DYN_SHIFT)
#define FPCR_DYN_NORMAL         (2U << FPCR_DYN_SHIFT)
#define FPCR_DYN_PLUS           (3U << FPCR_DYN_SHIFT)
#define FPCR_DYN_MASK           (3U << FPCR_DYN_SHIFT)
#define FPCR_IOV                (1U << (57 - 32))
#define FPCR_INE                (1U << (56 - 32))
#define FPCR_UNF                (1U << (55 - 32))
#define FPCR_OVF                (1U << (54 - 32))
#define FPCR_DZE                (1U << (53 - 32))
#define FPCR_INV                (1U << (52 - 32))
#define FPCR_OVFD               (1U << (51 - 32))
#define FPCR_DZED               (1U << (50 - 32))
#define FPCR_INVD               (1U << (49 - 32))
#define FPCR_DNZ                (1U << (48 - 32))
#define FPCR_DNOD               (1U << (47 - 32))
#define FPCR_STATUS_MASK        (FPCR_IOV | FPCR_INE | FPCR_UNF \
                                 | FPCR_OVF | FPCR_DZE | FPCR_INV)

@@ -179,25 +179,25 @@ enum {
   These are more or less architecturally required, since the real hardware
   has read-as-zero bits in the FPCR when the features aren't implemented.
   For the purposes of QEMU, we pretend the FPCR can hold everything.  */
#define SWCR_TRAP_ENABLE_INV	(1ULL << 1)
#define SWCR_TRAP_ENABLE_DZE	(1ULL << 2)
#define SWCR_TRAP_ENABLE_OVF	(1ULL << 3)
#define SWCR_TRAP_ENABLE_UNF	(1ULL << 4)
#define SWCR_TRAP_ENABLE_INE	(1ULL << 5)
#define SWCR_TRAP_ENABLE_DNO	(1ULL << 6)
#define SWCR_TRAP_ENABLE_MASK	((1ULL << 7) - (1ULL << 1))

#define SWCR_MAP_DMZ		(1ULL << 12)
#define SWCR_MAP_UMZ		(1ULL << 13)
#define SWCR_TRAP_ENABLE_INV    (1U << 1)
#define SWCR_TRAP_ENABLE_DZE    (1U << 2)
#define SWCR_TRAP_ENABLE_OVF    (1U << 3)
#define SWCR_TRAP_ENABLE_UNF    (1U << 4)
#define SWCR_TRAP_ENABLE_INE    (1U << 5)
#define SWCR_TRAP_ENABLE_DNO    (1U << 6)
#define SWCR_TRAP_ENABLE_MASK   ((1U << 7) - (1U << 1))

#define SWCR_MAP_DMZ            (1U << 12)
#define SWCR_MAP_UMZ            (1U << 13)
#define SWCR_MAP_MASK           (SWCR_MAP_DMZ | SWCR_MAP_UMZ)

#define SWCR_STATUS_INV		(1ULL << 17)
#define SWCR_STATUS_DZE		(1ULL << 18)
#define SWCR_STATUS_OVF		(1ULL << 19)
#define SWCR_STATUS_UNF		(1ULL << 20)
#define SWCR_STATUS_INE		(1ULL << 21)
#define SWCR_STATUS_DNO		(1ULL << 22)
#define SWCR_STATUS_MASK	((1ULL << 23) - (1ULL << 17))
#define SWCR_STATUS_INV         (1U << 17)
#define SWCR_STATUS_DZE         (1U << 18)
#define SWCR_STATUS_OVF         (1U << 19)
#define SWCR_STATUS_UNF         (1U << 20)
#define SWCR_STATUS_INE         (1U << 21)
#define SWCR_STATUS_DNO         (1U << 22)
#define SWCR_STATUS_MASK        ((1U << 23) - (1U << 17))

#define SWCR_MASK  (SWCR_TRAP_ENABLE_MASK | SWCR_MAP_MASK | SWCR_STATUS_MASK)

@@ -238,14 +238,13 @@ struct CPUAlphaState {
    uint64_t lock_addr;
    uint64_t lock_st_addr;
    uint64_t lock_value;

    /* The FPCR, and disassembled portions thereof.  */
    uint32_t fpcr;
    uint32_t fpcr_exc_enable;
    float_status fp_status;
    /* The following fields make up the FPCR, but in FP_STATUS format.  */
    uint8_t fpcr_exc_status;
    uint8_t fpcr_exc_mask;
    uint8_t fpcr_dyn_round;
    uint8_t fpcr_flush_to_zero;
    uint8_t fpcr_dnod;
    uint8_t fpcr_undz;

    /* The Internal Processor Registers.  Some of these we assume always
       exist for use in user-mode.  */
+83 −47
Original line number Diff line number Diff line
@@ -34,37 +34,38 @@ void helper_setflushzero(CPUAlphaState *env, uint32_t val)
    set_flush_to_zero(val, &FP_STATUS);
}

void helper_fp_exc_clear(CPUAlphaState *env)
#define CONVERT_BIT(X, SRC, DST) \
    (SRC > DST ? (X) / (SRC / DST) & (DST) : ((X) & SRC) * (DST / SRC))

static uint32_t soft_to_fpcr_exc(CPUAlphaState *env)
{
    uint8_t exc = get_float_exception_flags(&FP_STATUS);
    uint32_t ret = 0;

    if (unlikely(exc)) {
        set_float_exception_flags(0, &FP_STATUS);
        ret |= CONVERT_BIT(exc, float_flag_invalid, FPCR_INV);
        ret |= CONVERT_BIT(exc, float_flag_divbyzero, FPCR_DZE);
        ret |= CONVERT_BIT(exc, float_flag_overflow, FPCR_OVF);
        ret |= CONVERT_BIT(exc, float_flag_underflow, FPCR_UNF);
        ret |= CONVERT_BIT(exc, float_flag_inexact, FPCR_INE);
    }

uint32_t helper_fp_exc_get(CPUAlphaState *env)
{
    return get_float_exception_flags(&FP_STATUS);
    return ret;
}

static inline void inline_fp_exc_raise(CPUAlphaState *env, uintptr_t retaddr,
static void fp_exc_raise1(CPUAlphaState *env, uintptr_t retaddr,
                          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;
        }
        hw_exc |= CONVERT_BIT(exc, FPCR_INV, EXC_M_INV);
        hw_exc |= CONVERT_BIT(exc, FPCR_DZE, EXC_M_DZE);
        hw_exc |= CONVERT_BIT(exc, FPCR_OVF, EXC_M_FOV);
        hw_exc |= CONVERT_BIT(exc, FPCR_UNF, EXC_M_UNF);
        hw_exc |= CONVERT_BIT(exc, FPCR_INE, EXC_M_INE);
        hw_exc |= CONVERT_BIT(exc, FPCR_IOV, EXC_M_IOV);

        arith_excp(env, retaddr, hw_exc, 1ull << regno);
    }
@@ -73,18 +74,20 @@ static inline void inline_fp_exc_raise(CPUAlphaState *env, uintptr_t retaddr,
/* 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(CPUAlphaState *env, uint32_t exc, uint32_t regno)
void helper_fp_exc_raise(CPUAlphaState *env, uint32_t ignore, uint32_t regno)
{
    inline_fp_exc_raise(env, GETPC(), exc, regno);
    uint32_t exc = env->error_code & ~ignore;
    fp_exc_raise1(env, GETPC(), exc, regno);
}

/* Raise exceptions for ieee fp insns with software completion.  */
void helper_fp_exc_raise_s(CPUAlphaState *env, uint32_t exc, uint32_t regno)
void helper_fp_exc_raise_s(CPUAlphaState *env, uint32_t ignore, uint32_t regno)
{
    uint32_t exc = env->error_code & ~ignore;
    if (exc) {
        env->fpcr_exc_status |= exc;
        exc &= ~env->fpcr_exc_mask;
        inline_fp_exc_raise(env, GETPC(), exc, regno);
        env->fpcr |= exc;
        exc &= env->fpcr_exc_enable;
        fp_exc_raise1(env, GETPC(), exc, regno);
    }
}

@@ -190,6 +193,8 @@ uint64_t helper_adds(CPUAlphaState *env, uint64_t a, uint64_t b)
    fa = s_to_float32(a);
    fb = s_to_float32(b);
    fr = float32_add(fa, fb, &FP_STATUS);
    env->error_code = soft_to_fpcr_exc(env);

    return float32_to_s(fr);
}

@@ -200,6 +205,8 @@ uint64_t helper_subs(CPUAlphaState *env, uint64_t a, uint64_t b)
    fa = s_to_float32(a);
    fb = s_to_float32(b);
    fr = float32_sub(fa, fb, &FP_STATUS);
    env->error_code = soft_to_fpcr_exc(env);

    return float32_to_s(fr);
}

@@ -210,6 +217,8 @@ uint64_t helper_muls(CPUAlphaState *env, uint64_t a, uint64_t b)
    fa = s_to_float32(a);
    fb = s_to_float32(b);
    fr = float32_mul(fa, fb, &FP_STATUS);
    env->error_code = soft_to_fpcr_exc(env);

    return float32_to_s(fr);
}

@@ -220,6 +229,8 @@ uint64_t helper_divs(CPUAlphaState *env, uint64_t a, uint64_t b)
    fa = s_to_float32(a);
    fb = s_to_float32(b);
    fr = float32_div(fa, fb, &FP_STATUS);
    env->error_code = soft_to_fpcr_exc(env);

    return float32_to_s(fr);
}

@@ -229,6 +240,8 @@ uint64_t helper_sqrts(CPUAlphaState *env, uint64_t a)

    fa = s_to_float32(a);
    fr = float32_sqrt(fa, &FP_STATUS);
    env->error_code = soft_to_fpcr_exc(env);

    return float32_to_s(fr);
}

@@ -257,6 +270,8 @@ uint64_t helper_addt(CPUAlphaState *env, uint64_t a, uint64_t b)
    fa = t_to_float64(a);
    fb = t_to_float64(b);
    fr = float64_add(fa, fb, &FP_STATUS);
    env->error_code = soft_to_fpcr_exc(env);

    return float64_to_t(fr);
}

@@ -267,6 +282,8 @@ uint64_t helper_subt(CPUAlphaState *env, uint64_t a, uint64_t b)
    fa = t_to_float64(a);
    fb = t_to_float64(b);
    fr = float64_sub(fa, fb, &FP_STATUS);
    env->error_code = soft_to_fpcr_exc(env);

    return float64_to_t(fr);
}

@@ -277,6 +294,8 @@ uint64_t helper_mult(CPUAlphaState *env, uint64_t a, uint64_t b)
    fa = t_to_float64(a);
    fb = t_to_float64(b);
    fr = float64_mul(fa, fb, &FP_STATUS);
    env->error_code = soft_to_fpcr_exc(env);

    return float64_to_t(fr);
}

@@ -287,6 +306,8 @@ uint64_t helper_divt(CPUAlphaState *env, uint64_t a, uint64_t b)
    fa = t_to_float64(a);
    fb = t_to_float64(b);
    fr = float64_div(fa, fb, &FP_STATUS);
    env->error_code = soft_to_fpcr_exc(env);

    return float64_to_t(fr);
}

@@ -296,6 +317,8 @@ uint64_t helper_sqrtt(CPUAlphaState *env, uint64_t a)

    fa = t_to_float64(a);
    fr = float64_sqrt(fa, &FP_STATUS);
    env->error_code = soft_to_fpcr_exc(env);

    return float64_to_t(fr);
}

@@ -303,57 +326,65 @@ uint64_t helper_sqrtt(CPUAlphaState *env, uint64_t a)
uint64_t helper_cmptun(CPUAlphaState *env, uint64_t a, uint64_t b)
{
    float64 fa, fb;
    uint64_t ret = 0;

    fa = t_to_float64(a);
    fb = t_to_float64(b);

    if (float64_unordered_quiet(fa, fb, &FP_STATUS)) {
        return 0x4000000000000000ULL;
    } else {
        return 0;
        ret = 0x4000000000000000ULL;
    }
    env->error_code = soft_to_fpcr_exc(env);

    return ret;
}

uint64_t helper_cmpteq(CPUAlphaState *env, uint64_t a, uint64_t b)
{
    float64 fa, fb;
    uint64_t ret = 0;

    fa = t_to_float64(a);
    fb = t_to_float64(b);

    if (float64_eq_quiet(fa, fb, &FP_STATUS)) {
        return 0x4000000000000000ULL;
    } else {
        return 0;
        ret = 0x4000000000000000ULL;
    }
    env->error_code = soft_to_fpcr_exc(env);

    return ret;
}

uint64_t helper_cmptle(CPUAlphaState *env, uint64_t a, uint64_t b)
{
    float64 fa, fb;
    uint64_t ret = 0;

    fa = t_to_float64(a);
    fb = t_to_float64(b);

    if (float64_le(fa, fb, &FP_STATUS)) {
        return 0x4000000000000000ULL;
    } else {
        return 0;
        ret = 0x4000000000000000ULL;
    }
    env->error_code = soft_to_fpcr_exc(env);

    return ret;
}

uint64_t helper_cmptlt(CPUAlphaState *env, uint64_t a, uint64_t b)
{
    float64 fa, fb;
    uint64_t ret = 0;

    fa = t_to_float64(a);
    fb = t_to_float64(b);

    if (float64_lt(fa, fb, &FP_STATUS)) {
        return 0x4000000000000000ULL;
    } else {
        return 0;
        ret = 0x4000000000000000ULL;
    }
    env->error_code = soft_to_fpcr_exc(env);

    return ret;
}

/* Floating point format conversion */
@@ -364,6 +395,8 @@ uint64_t helper_cvtts(CPUAlphaState *env, uint64_t a)

    fa = t_to_float64(a);
    fr = float64_to_float32(fa, &FP_STATUS);
    env->error_code = soft_to_fpcr_exc(env);

    return float32_to_s(fr);
}

@@ -374,12 +407,16 @@ uint64_t helper_cvtst(CPUAlphaState *env, uint64_t a)

    fa = s_to_float32(a);
    fr = float32_to_float64(fa, &FP_STATUS);
    env->error_code = soft_to_fpcr_exc(env);

    return float64_to_t(fr);
}

uint64_t helper_cvtqs(CPUAlphaState *env, uint64_t a)
{
    float32 fr = int64_to_float32(a, &FP_STATUS);
    env->error_code = soft_to_fpcr_exc(env);

    return float32_to_s(fr);
}

@@ -405,7 +442,7 @@ static inline uint64_t inline_cvttq(CPUAlphaState *env, uint64_t a,
            goto do_underflow;
        }
    } else if (exp == 0x7ff) {
        exc = (frac ? float_flag_invalid : VI ? float_flag_overflow : 0);
        exc = (frac ? FPCR_INV : VI ? FPCR_OVF : 0);
    } else {
        /* Restore implicit bit.  */
        frac |= 0x10000000000000ull;
@@ -417,7 +454,7 @@ static inline uint64_t inline_cvttq(CPUAlphaState *env, uint64_t a,
            if (shift < 63) {
                ret = frac << shift;
                if (VI && (ret >> shift) != frac) {
                    exc = float_flag_overflow;
                    exc = FPCR_OVF;
                }
            }
        } else {
@@ -440,7 +477,7 @@ static inline uint64_t inline_cvttq(CPUAlphaState *env, uint64_t a,
            }

            if (round) {
                exc = (VI ? float_flag_inexact : 0);
                exc = (VI ? FPCR_INE : 0);
                switch (roundmode) {
                case float_round_nearest_even:
                    if (round == (1ull << 63)) {
@@ -465,9 +502,7 @@ static inline uint64_t inline_cvttq(CPUAlphaState *env, uint64_t a,
            ret = -ret;
        }
    }
    if (unlikely(exc)) {
        float_raise(exc, &FP_STATUS);
    }
    env->error_code = exc;

    return ret;
}
@@ -490,6 +525,7 @@ uint64_t helper_cvttq_svic(CPUAlphaState *env, uint64_t a)
uint64_t helper_cvtqt(CPUAlphaState *env, uint64_t a)
{
    float64 fr = int64_to_float64(a, &FP_STATUS);
    env->error_code = soft_to_fpcr_exc(env);
    return float64_to_t(fr);
}

+21 −109
Original line number Diff line number Diff line
@@ -25,136 +25,48 @@
#include "fpu/softfloat.h"
#include "exec/helper-proto.h"

uint64_t cpu_alpha_load_fpcr (CPUAlphaState *env)
{
    uint64_t r = 0;
    uint8_t t;

    t = env->fpcr_exc_status;
    if (t) {
        r = FPCR_SUM;
        if (t & float_flag_invalid) {
            r |= FPCR_INV;
        }
        if (t & float_flag_divbyzero) {
            r |= FPCR_DZE;
        }
        if (t & float_flag_overflow) {
            r |= FPCR_OVF;
        }
        if (t & float_flag_underflow) {
            r |= FPCR_UNF;
        }
        if (t & float_flag_inexact) {
            r |= FPCR_INE;
        }
    }

    t = env->fpcr_exc_mask;
    if (t & float_flag_invalid) {
        r |= FPCR_INVD;
    }
    if (t & float_flag_divbyzero) {
        r |= FPCR_DZED;
    }
    if (t & float_flag_overflow) {
        r |= FPCR_OVFD;
    }
    if (t & float_flag_underflow) {
        r |= FPCR_UNFD;
    }
    if (t & float_flag_inexact) {
        r |= FPCR_INED;
    }

    switch (env->fpcr_dyn_round) {
    case float_round_nearest_even:
        r |= FPCR_DYN_NORMAL;
        break;
    case float_round_down:
        r |= FPCR_DYN_MINUS;
        break;
    case float_round_up:
        r |= FPCR_DYN_PLUS;
        break;
    case float_round_to_zero:
        r |= FPCR_DYN_CHOPPED;
        break;
    }
#define CONVERT_BIT(X, SRC, DST) \
    (SRC > DST ? (X) / (SRC / DST) & (DST) : ((X) & SRC) * (DST / SRC))

    if (env->fp_status.flush_inputs_to_zero) {
        r |= FPCR_DNZ;
    }
    if (env->fpcr_dnod) {
        r |= FPCR_DNOD;
    }
    if (env->fpcr_undz) {
        r |= FPCR_UNDZ;
    }

    return r;
uint64_t cpu_alpha_load_fpcr (CPUAlphaState *env)
{
    return (uint64_t)env->fpcr << 32;
}

void cpu_alpha_store_fpcr (CPUAlphaState *env, uint64_t val)
{
    uint8_t t;
    uint32_t fpcr = val >> 32;
    uint32_t t = 0;

    t = 0;
    if (val & FPCR_INV) {
        t |= float_flag_invalid;
    }
    if (val & FPCR_DZE) {
        t |= float_flag_divbyzero;
    }
    if (val & FPCR_OVF) {
        t |= float_flag_overflow;
    }
    if (val & FPCR_UNF) {
        t |= float_flag_underflow;
    }
    if (val & FPCR_INE) {
        t |= float_flag_inexact;
    }
    env->fpcr_exc_status = t;
    t |= CONVERT_BIT(fpcr, FPCR_INED, FPCR_INE);
    t |= CONVERT_BIT(fpcr, FPCR_UNFD, FPCR_UNF);
    t |= CONVERT_BIT(fpcr, FPCR_OVFD, FPCR_OVF);
    t |= CONVERT_BIT(fpcr, FPCR_DZED, FPCR_DZE);
    t |= CONVERT_BIT(fpcr, FPCR_INVD, FPCR_INV);

    t = 0;
    if (val & FPCR_INVD) {
        t |= float_flag_invalid;
    }
    if (val & FPCR_DZED) {
        t |= float_flag_divbyzero;
    }
    if (val & FPCR_OVFD) {
        t |= float_flag_overflow;
    }
    if (val & FPCR_UNFD) {
        t |= float_flag_underflow;
    }
    if (val & FPCR_INED) {
        t |= float_flag_inexact;
    }
    env->fpcr_exc_mask = t;
    env->fpcr = fpcr;
    env->fpcr_exc_enable = ~t & FPCR_STATUS_MASK;

    switch (val & FPCR_DYN_MASK) {
    switch (fpcr & FPCR_DYN_MASK) {
    case FPCR_DYN_NORMAL:
    default:
        t = float_round_nearest_even;
        break;
    case FPCR_DYN_CHOPPED:
        t = float_round_to_zero;
        break;
    case FPCR_DYN_MINUS:
        t = float_round_down;
        break;
    case FPCR_DYN_NORMAL:
        t = float_round_nearest_even;
        break;
    case FPCR_DYN_PLUS:
        t = float_round_up;
        break;
    }
    env->fpcr_dyn_round = t;

    env->fpcr_dnod = (val & FPCR_DNOD) != 0;
    env->fpcr_undz = (val & FPCR_UNDZ) != 0;
    env->fpcr_flush_to_zero = env->fpcr_dnod & env->fpcr_undz;
    env->fp_status.flush_inputs_to_zero = (val & FPCR_DNZ) != 0;
    env->fpcr_flush_to_zero = (fpcr & FPCR_UNFD) && (fpcr & FPCR_UNDZ);
    env->fp_status.flush_inputs_to_zero = (fpcr & FPCR_DNZ) != 0;
}

uint64_t helper_load_fpcr(CPUAlphaState *env)
+0 −2
Original line number Diff line number Diff line
@@ -87,8 +87,6 @@ DEF_HELPER_FLAGS_2(cvttq_svic, TCG_CALL_NO_RWG, i64, env, i64)

DEF_HELPER_FLAGS_2(setroundmode, TCG_CALL_NO_RWG, void, env, i32)
DEF_HELPER_FLAGS_2(setflushzero, TCG_CALL_NO_RWG, void, env, i32)
DEF_HELPER_FLAGS_1(fp_exc_clear, TCG_CALL_NO_RWG, void, env)
DEF_HELPER_FLAGS_1(fp_exc_get, TCG_CALL_NO_RWG_SE, i32, env)
DEF_HELPER_FLAGS_3(fp_exc_raise, TCG_CALL_NO_WG, void, env, i32, i32)
DEF_HELPER_FLAGS_3(fp_exc_raise_s, TCG_CALL_NO_WG, void, env, i32, i32)

+8 −37
Original line number Diff line number Diff line
@@ -663,18 +663,6 @@ static TCGv gen_ieee_input(DisasContext *ctx, int reg, int fn11, int is_cmp)
    return val;
}

static void gen_fp_exc_clear(void)
{
#if defined(CONFIG_SOFTFLOAT_INLINE)
    TCGv_i32 zero = tcg_const_i32(0);
    tcg_gen_st8_i32(zero, cpu_env,
                    offsetof(CPUAlphaState, fp_status.float_exception_flags));
    tcg_temp_free_i32(zero);
#else
    gen_helper_fp_exc_clear(cpu_env);
#endif
}

static void gen_fp_exc_raise_ignore(int rc, int fn11, int ignore)
{
    /* ??? We ought to be able to do something with imprecise exceptions.
@@ -682,20 +670,9 @@ static void gen_fp_exc_raise_ignore(int rc, int fn11, int ignore)
       TB and do not generate the code to signal the exception; end the TB
       when an exception is forced to arrive, either by consumption of a
       register value or TRAPB or EXCB.  */
    TCGv_i32 exc = tcg_temp_new_i32();
    TCGv_i32 ign = tcg_const_i32(ignore);
    TCGv_i32 reg;

#if defined(CONFIG_SOFTFLOAT_INLINE)
    tcg_gen_ld8u_i32(exc, cpu_env,
                     offsetof(CPUAlphaState, fp_status.float_exception_flags));
#else
    gen_helper_fp_exc_get(exc, cpu_env);
#endif

    if (ignore) {
        tcg_gen_andi_i32(exc, exc, ~ignore);
    }

    /* ??? Pass in the regno of the destination so that the helper can
       set EXC_MASK, which contains a bitmask of destination registers
       that have caused arithmetic traps.  A simple userspace emulation
@@ -704,18 +681,18 @@ static void gen_fp_exc_raise_ignore(int rc, int fn11, int ignore)
    reg = tcg_const_i32(rc + 32);

    if (fn11 & QUAL_S) {
        gen_helper_fp_exc_raise_s(cpu_env, exc, reg);
        gen_helper_fp_exc_raise_s(cpu_env, ign, reg);
    } else {
        gen_helper_fp_exc_raise(cpu_env, exc, reg);
        gen_helper_fp_exc_raise(cpu_env, ign, reg);
    }

    tcg_temp_free_i32(reg);
    tcg_temp_free_i32(exc);
    tcg_temp_free_i32(ign);
}

static inline void gen_fp_exc_raise(int rc, int fn11)
{
    gen_fp_exc_raise_ignore(rc, fn11, fn11 & QUAL_I ? 0 : float_flag_inexact);
    gen_fp_exc_raise_ignore(rc, fn11, fn11 & QUAL_I ? 0 : FPCR_INE);
}

static void gen_cvtlq(TCGv vc, TCGv vb)
@@ -754,7 +731,6 @@ static void gen_ieee_arith2(DisasContext *ctx,

    gen_qual_roundmode(ctx, fn11);
    gen_qual_flushzero(ctx, fn11);
    gen_fp_exc_clear();

    vb = gen_ieee_input(ctx, rb, fn11, 0);
    helper(dest_fpr(ctx, rc), cpu_env, vb);
@@ -779,7 +755,6 @@ static void gen_cvttq(DisasContext *ctx, int rb, int rc, int fn11)
    int ignore = 0;

    /* No need to set flushzero, since we have an integer output.  */
    gen_fp_exc_clear();
    vb = gen_ieee_input(ctx, rb, fn11, 0);
    vc = dest_fpr(ctx, rc);

@@ -791,7 +766,7 @@ static void gen_cvttq(DisasContext *ctx, int rb, int rc, int fn11)
        break;
    case QUAL_V | QUAL_RM_C:
    case QUAL_S | QUAL_V | QUAL_RM_C:
        ignore = float_flag_inexact;
        ignore = FPCR_INE;
        /* FALLTHRU */
    case QUAL_S | QUAL_V | QUAL_I | QUAL_RM_C:
        gen_helper_cvttq_svic(vc, cpu_env, vb);
@@ -799,8 +774,8 @@ static void gen_cvttq(DisasContext *ctx, int rb, int rc, int fn11)
    default:
        gen_qual_roundmode(ctx, fn11);
        gen_helper_cvttq(vc, cpu_env, vb);
        ignore |= (fn11 & QUAL_V ? 0 : float_flag_overflow);
        ignore |= (fn11 & QUAL_I ? 0 : float_flag_inexact);
        ignore |= (fn11 & QUAL_V ? 0 : FPCR_IOV);
        ignore |= (fn11 & QUAL_I ? 0 : FPCR_INE);
        break;
    }

@@ -821,7 +796,6 @@ static void gen_ieee_intcvt(DisasContext *ctx,
       is inexact.  Thus we only need to worry about exceptions when
       inexact handling is requested.  */
    if (fn11 & QUAL_I) {
        gen_fp_exc_clear();
        helper(vc, cpu_env, vb);
        gen_fp_exc_raise(rc, fn11);
    } else {
@@ -864,7 +838,6 @@ static void gen_ieee_arith3(DisasContext *ctx,

    gen_qual_roundmode(ctx, fn11);
    gen_qual_flushzero(ctx, fn11);
    gen_fp_exc_clear();

    va = gen_ieee_input(ctx, ra, fn11, 0);
    vb = gen_ieee_input(ctx, rb, fn11, 0);
@@ -895,8 +868,6 @@ static void gen_ieee_compare(DisasContext *ctx,
{
    TCGv va, vb, vc;

    gen_fp_exc_clear();

    va = gen_ieee_input(ctx, ra, fn11, 1);
    vb = gen_ieee_input(ctx, rb, fn11, 1);
    vc = dest_fpr(ctx, rc);