[qemu.git] / target-s390x / fpu_helper.c

/*
 *  S/390 FPU helper routines
 *
 *  Copyright (c) 2009 Ulrich Hecht
 *  Copyright (c) 2009 Alexander Graf
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2 of the License, or (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, see <http://www.gnu.org/licenses/>.
 */

#include "cpu.h"
#include "helper.h"

#if !defined(CONFIG_USER_ONLY)
#include "exec/softmmu_exec.h"
#endif

/* #define DEBUG_HELPER */
#ifdef DEBUG_HELPER
#define HELPER_LOG(x...) qemu_log(x)
#else
#define HELPER_LOG(x...)
#endif

#define RET128(F) (env->retxl = F.low, F.high)

#define convert_bit(mask, from, to) \
    (to < from                      \
     ? (mask / (from / to)) & to    \
     : (mask & from) * (to / from))

static void ieee_exception(CPUS390XState *env, uint32_t dxc, uintptr_t retaddr)
{
    /* Install the DXC code.  */
    env->fpc = (env->fpc & ~0xff00) | (dxc << 8);
    /* Trap.  */
    runtime_exception(env, PGM_DATA, retaddr);
}

/* Should be called after any operation that may raise IEEE exceptions.  */
static void handle_exceptions(CPUS390XState *env, uintptr_t retaddr)
{
    unsigned s390_exc, qemu_exc;

    /* Get the exceptions raised by the current operation.  Reset the
       fpu_status contents so that the next operation has a clean slate.  */
    qemu_exc = env->fpu_status.float_exception_flags;
    if (qemu_exc == 0) {
        return;
    }
    env->fpu_status.float_exception_flags = 0;

    /* Convert softfloat exception bits to s390 exception bits.  */
    s390_exc = 0;
    s390_exc |= convert_bit(qemu_exc, float_flag_invalid, 0x80);
    s390_exc |= convert_bit(qemu_exc, float_flag_divbyzero, 0x40);
    s390_exc |= convert_bit(qemu_exc, float_flag_overflow, 0x20);
    s390_exc |= convert_bit(qemu_exc, float_flag_underflow, 0x10);
    s390_exc |= convert_bit(qemu_exc, float_flag_inexact, 0x08);

    /* Install the exceptions that we raised.  */
    env->fpc |= s390_exc << 16;

    /* Send signals for enabled exceptions.  */
    s390_exc &= env->fpc >> 24;
    if (s390_exc) {
        ieee_exception(env, s390_exc, retaddr);
    }
}

static inline int float_comp_to_cc(CPUS390XState *env, int float_compare)
{
    switch (float_compare) {
    case float_relation_equal:
        return 0;
    case float_relation_less:
        return 1;
    case float_relation_greater:
        return 2;
    case float_relation_unordered:
        return 3;
    default:
        cpu_abort(env, "unknown return value for float compare\n");
    }
}

/* condition codes for unary FP ops */
uint32_t set_cc_nz_f32(float32 v)
{
    if (float32_is_any_nan(v)) {
        return 3;
    } else if (float32_is_zero(v)) {
        return 0;
    } else if (float32_is_neg(v)) {
        return 1;
    } else {
        return 2;
    }
}

uint32_t set_cc_nz_f64(float64 v)
{
    if (float64_is_any_nan(v)) {
        return 3;
    } else if (float64_is_zero(v)) {
        return 0;
    } else if (float64_is_neg(v)) {
        return 1;
    } else {
        return 2;
    }
}

uint32_t set_cc_nz_f128(float128 v)
{
    if (float128_is_any_nan(v)) {
        return 3;
    } else if (float128_is_zero(v)) {
        return 0;
    } else if (float128_is_neg(v)) {
        return 1;
    } else {
        return 2;
    }
}

/* 32-bit FP addition */
uint64_t HELPER(aeb)(CPUS390XState *env, uint64_t f1, uint64_t f2)
{
    float32 ret = float32_add(f1, f2, &env->fpu_status);
    handle_exceptions(env, GETPC());
    return ret;
}

/* 64-bit FP addition */
uint64_t HELPER(adb)(CPUS390XState *env, uint64_t f1, uint64_t f2)
{
    float64 ret = float64_add(f1, f2, &env->fpu_status);
    handle_exceptions(env, GETPC());
    return ret;
}

/* 128-bit FP addition */
uint64_t HELPER(axb)(CPUS390XState *env, uint64_t ah, uint64_t al,
                     uint64_t bh, uint64_t bl)
{
    float128 ret = float128_add(make_float128(ah, al),
                                make_float128(bh, bl),
                                &env->fpu_status);
    handle_exceptions(env, GETPC());
    return RET128(ret);
}

/* 32-bit FP subtraction */
uint64_t HELPER(seb)(CPUS390XState *env, uint64_t f1, uint64_t f2)
{
    float32 ret = float32_sub(f1, f2, &env->fpu_status);
    handle_exceptions(env, GETPC());
    return ret;
}

/* 64-bit FP subtraction */
uint64_t HELPER(sdb)(CPUS390XState *env, uint64_t f1, uint64_t f2)
{
    float64 ret = float64_sub(f1, f2, &env->fpu_status);
    handle_exceptions(env, GETPC());
    return ret;
}

/* 128-bit FP subtraction */
uint64_t HELPER(sxb)(CPUS390XState *env, uint64_t ah, uint64_t al,
                     uint64_t bh, uint64_t bl)
{
    float128 ret = float128_sub(make_float128(ah, al),
                                make_float128(bh, bl),
                                &env->fpu_status);
    handle_exceptions(env, GETPC());
    return RET128(ret);
}

/* 32-bit FP division */
uint64_t HELPER(deb)(CPUS390XState *env, uint64_t f1, uint64_t f2)
{
    float32 ret = float32_div(f1, f2, &env->fpu_status);
    handle_exceptions(env, GETPC());
    return ret;
}

/* 64-bit FP division */
uint64_t HELPER(ddb)(CPUS390XState *env, uint64_t f1, uint64_t f2)
{
    float64 ret = float64_div(f1, f2, &env->fpu_status);
    handle_exceptions(env, GETPC());
    return ret;
}

/* 128-bit FP division */
uint64_t HELPER(dxb)(CPUS390XState *env, uint64_t ah, uint64_t al,
                     uint64_t bh, uint64_t bl)
{
    float128 ret = float128_div(make_float128(ah, al),
                                make_float128(bh, bl),
                                &env->fpu_status);
    handle_exceptions(env, GETPC());
    return RET128(ret);
}

/* 32-bit FP multiplication */
uint64_t HELPER(meeb)(CPUS390XState *env, uint64_t f1, uint64_t f2)
{
    float32 ret = float32_mul(f1, f2, &env->fpu_status);
    handle_exceptions(env, GETPC());
    return ret;
}

/* 64-bit FP multiplication */
uint64_t HELPER(mdb)(CPUS390XState *env, uint64_t f1, uint64_t f2)
{
    float64 ret = float64_mul(f1, f2, &env->fpu_status);
    handle_exceptions(env, GETPC());
    return ret;
}

/* 64/32-bit FP multiplication */
uint64_t HELPER(mdeb)(CPUS390XState *env, uint64_t f1, uint64_t f2)
{
    float64 ret = float32_to_float64(f2, &env->fpu_status);
    ret = float64_mul(f1, ret, &env->fpu_status);
    handle_exceptions(env, GETPC());
    return ret;
}

/* 128-bit FP multiplication */
uint64_t HELPER(mxb)(CPUS390XState *env, uint64_t ah, uint64_t al,
                     uint64_t bh, uint64_t bl)
{
    float128 ret = float128_mul(make_float128(ah, al),
                                make_float128(bh, bl),
                                &env->fpu_status);
    handle_exceptions(env, GETPC());
    return RET128(ret);
}

/* 128/64-bit FP multiplication */
uint64_t HELPER(mxdb)(CPUS390XState *env, uint64_t ah, uint64_t al,
                      uint64_t f2)
{
    float128 ret = float64_to_float128(f2, &env->fpu_status);
    ret = float128_mul(make_float128(ah, al), ret, &env->fpu_status);
    handle_exceptions(env, GETPC());
    return RET128(ret);
}

/* convert 32-bit float to 64-bit float */
uint64_t HELPER(ldeb)(CPUS390XState *env, uint64_t f2)
{
    float64 ret = float32_to_float64(f2, &env->fpu_status);
    handle_exceptions(env, GETPC());
    return ret;
}

/* convert 128-bit float to 64-bit float */
uint64_t HELPER(ldxb)(CPUS390XState *env, uint64_t ah, uint64_t al)
{
    float64 ret = float128_to_float64(make_float128(ah, al), &env->fpu_status);
    handle_exceptions(env, GETPC());
    return ret;
}

/* convert 64-bit float to 128-bit float */
uint64_t HELPER(lxdb)(CPUS390XState *env, uint64_t f2)
{
    float128 ret = float64_to_float128(f2, &env->fpu_status);
    handle_exceptions(env, GETPC());
    return RET128(ret);
}

/* convert 32-bit float to 128-bit float */
uint64_t HELPER(lxeb)(CPUS390XState *env, uint64_t f2)
{
    float128 ret = float32_to_float128(f2, &env->fpu_status);
    handle_exceptions(env, GETPC());
    return RET128(ret);
}

/* convert 64-bit float to 32-bit float */
uint64_t HELPER(ledb)(CPUS390XState *env, uint64_t f2)
{
    float32 ret = float64_to_float32(f2, &env->fpu_status);
    handle_exceptions(env, GETPC());
    return ret;
}

/* convert 128-bit float to 32-bit float */
uint64_t HELPER(lexb)(CPUS390XState *env, uint64_t ah, uint64_t al)
{
    float32 ret = float128_to_float32(make_float128(ah, al), &env->fpu_status);
    handle_exceptions(env, GETPC());
    return ret;
}

/* 32-bit FP compare */
uint32_t HELPER(ceb)(CPUS390XState *env, uint64_t f1, uint64_t f2)
{
    int cmp = float32_compare_quiet(f1, f2, &env->fpu_status);
    handle_exceptions(env, GETPC());
    return float_comp_to_cc(env, cmp);
}

/* 64-bit FP compare */
uint32_t HELPER(cdb)(CPUS390XState *env, uint64_t f1, uint64_t f2)
{
    int cmp = float64_compare_quiet(f1, f2, &env->fpu_status);
    handle_exceptions(env, GETPC());
    return float_comp_to_cc(env, cmp);
}

/* 128-bit FP compare */
uint32_t HELPER(cxb)(CPUS390XState *env, uint64_t ah, uint64_t al,
                     uint64_t bh, uint64_t bl)
{
    int cmp = float128_compare_quiet(make_float128(ah, al),
                                     make_float128(bh, bl),
                                     &env->fpu_status);
    handle_exceptions(env, GETPC());
    return float_comp_to_cc(env, cmp);
}

static int swap_round_mode(CPUS390XState *env, int m3)
{
    int ret = env->fpu_status.float_rounding_mode;
    switch (m3) {
    case 0:
        /* current mode */
        break;
    case 1:
        /* biased round no nearest */
    case 4:
        /* round to nearest */
        set_float_rounding_mode(float_round_nearest_even, &env->fpu_status);
        break;
    case 5:
        /* round to zero */
        set_float_rounding_mode(float_round_to_zero, &env->fpu_status);
        break;
    case 6:
        /* round to +inf */
        set_float_rounding_mode(float_round_up, &env->fpu_status);
        break;
    case 7:
        /* round to -inf */
        set_float_rounding_mode(float_round_down, &env->fpu_status);
        break;
    }
    return ret;
}

/* convert 64-bit int to 32-bit float */
uint64_t HELPER(cegb)(CPUS390XState *env, int64_t v2, uint32_t m3)
{
    int hold = swap_round_mode(env, m3);
    float32 ret = int64_to_float32(v2, &env->fpu_status);
    set_float_rounding_mode(hold, &env->fpu_status);
    handle_exceptions(env, GETPC());
    return ret;
}

/* convert 64-bit int to 64-bit float */
uint64_t HELPER(cdgb)(CPUS390XState *env, int64_t v2, uint32_t m3)
{
    int hold = swap_round_mode(env, m3);
    float64 ret = int64_to_float64(v2, &env->fpu_status);
    set_float_rounding_mode(hold, &env->fpu_status);
    handle_exceptions(env, GETPC());
    return ret;
}

/* convert 64-bit int to 128-bit float */
uint64_t HELPER(cxgb)(CPUS390XState *env, int64_t v2, uint32_t m3)
{
    int hold = swap_round_mode(env, m3);
    float128 ret = int64_to_float128(v2, &env->fpu_status);
    set_float_rounding_mode(hold, &env->fpu_status);
    handle_exceptions(env, GETPC());
    return RET128(ret);
}

/* convert 32-bit float to 64-bit int */
uint64_t HELPER(cgeb)(CPUS390XState *env, uint64_t v2, uint32_t m3)
{
    int hold = swap_round_mode(env, m3);
    int64_t ret = float32_to_int64(v2, &env->fpu_status);
    set_float_rounding_mode(hold, &env->fpu_status);
    handle_exceptions(env, GETPC());
    return ret;
}

/* convert 64-bit float to 64-bit int */
uint64_t HELPER(cgdb)(CPUS390XState *env, uint64_t v2, uint32_t m3)
{
    int hold = swap_round_mode(env, m3);
    int64_t ret = float64_to_int64(v2, &env->fpu_status);
    set_float_rounding_mode(hold, &env->fpu_status);
    handle_exceptions(env, GETPC());
    return ret;
}

/* convert 128-bit float to 64-bit int */
uint64_t HELPER(cgxb)(CPUS390XState *env, uint64_t h, uint64_t l, uint32_t m3)
{
    int hold = swap_round_mode(env, m3);
    float128 v2 = make_float128(h, l);
    int64_t ret = float128_to_int64(v2, &env->fpu_status);
    set_float_rounding_mode(hold, &env->fpu_status);
    handle_exceptions(env, GETPC());
    return ret;
}

/* convert 32-bit float to 32-bit int */
uint64_t HELPER(cfeb)(CPUS390XState *env, uint64_t v2, uint32_t m3)
{
    int hold = swap_round_mode(env, m3);
    int32_t ret = float32_to_int32(v2, &env->fpu_status);
    set_float_rounding_mode(hold, &env->fpu_status);
    handle_exceptions(env, GETPC());
    return ret;
}

/* convert 64-bit float to 32-bit int */
uint64_t HELPER(cfdb)(CPUS390XState *env, uint64_t v2, uint32_t m3)
{
    int hold = swap_round_mode(env, m3);
    int32_t ret = float64_to_int32(v2, &env->fpu_status);
    set_float_rounding_mode(hold, &env->fpu_status);
    handle_exceptions(env, GETPC());
    return ret;
}

/* convert 128-bit float to 32-bit int */
uint64_t HELPER(cfxb)(CPUS390XState *env, uint64_t h, uint64_t l, uint32_t m3)
{
    int hold = swap_round_mode(env, m3);
    float128 v2 = make_float128(h, l);
    int32_t ret = float128_to_int32(v2, &env->fpu_status);
    set_float_rounding_mode(hold, &env->fpu_status);
    handle_exceptions(env, GETPC());
    return ret;
}

/* 32-bit FP multiply and add */
uint64_t HELPER(maeb)(CPUS390XState *env, uint64_t f1,
                      uint64_t f2, uint64_t f3)
{
    float32 ret = float32_muladd(f2, f3, f1, 0, &env->fpu_status);
    handle_exceptions(env, GETPC());
    return ret;
}

/* 64-bit FP multiply and add */
uint64_t HELPER(madb)(CPUS390XState *env, uint64_t f1,
                      uint64_t f2, uint64_t f3)
{
    float64 ret = float64_muladd(f2, f3, f1, 0, &env->fpu_status);
    handle_exceptions(env, GETPC());
    return ret;
}

/* 32-bit FP multiply and subtract */
uint64_t HELPER(mseb)(CPUS390XState *env, uint64_t f1,
                      uint64_t f2, uint64_t f3)
{
    float32 ret = float32_muladd(f2, f3, f1, float_muladd_negate_c,
                                 &env->fpu_status);
    handle_exceptions(env, GETPC());
    return ret;
}

/* 64-bit FP multiply and subtract */
uint64_t HELPER(msdb)(CPUS390XState *env, uint64_t f1,
                      uint64_t f2, uint64_t f3)
{
    float64 ret = float64_muladd(f2, f3, f1, float_muladd_negate_c,
                                 &env->fpu_status);
    handle_exceptions(env, GETPC());
    return ret;
}

/* test data class 32-bit */
uint32_t HELPER(tceb)(uint64_t f1, uint64_t m2)
{
    float32 v1 = f1;
    int neg = float32_is_neg(v1);
    uint32_t cc = 0;

    if ((float32_is_zero(v1) && (m2 & (1 << (11-neg)))) ||
        (float32_is_infinity(v1) && (m2 & (1 << (5-neg)))) ||
        (float32_is_any_nan(v1) && (m2 & (1 << (3-neg)))) ||
        (float32_is_signaling_nan(v1) && (m2 & (1 << (1-neg))))) {
        cc = 1;
    } else if (m2 & (1 << (9-neg))) {
        /* assume normalized number */
        cc = 1;
    }
    /* FIXME: denormalized? */
    return cc;
}

/* test data class 64-bit */
uint32_t HELPER(tcdb)(uint64_t v1, uint64_t m2)
{
    int neg = float64_is_neg(v1);
    uint32_t cc = 0;

    if ((float64_is_zero(v1) && (m2 & (1 << (11-neg)))) ||
        (float64_is_infinity(v1) && (m2 & (1 << (5-neg)))) ||
        (float64_is_any_nan(v1) && (m2 & (1 << (3-neg)))) ||
        (float64_is_signaling_nan(v1) && (m2 & (1 << (1-neg))))) {
        cc = 1;
    } else if (m2 & (1 << (9-neg))) {
        /* assume normalized number */
        cc = 1;
    }
    /* FIXME: denormalized? */
    return cc;
}

/* test data class 128-bit */
uint32_t HELPER(tcxb)(uint64_t ah, uint64_t al, uint64_t m2)
{
    float128 v1 = make_float128(ah, al);
    int neg = float128_is_neg(v1);
    uint32_t cc = 0;

    if ((float128_is_zero(v1) && (m2 & (1 << (11-neg)))) ||
        (float128_is_infinity(v1) && (m2 & (1 << (5-neg)))) ||
        (float128_is_any_nan(v1) && (m2 & (1 << (3-neg)))) ||
        (float128_is_signaling_nan(v1) && (m2 & (1 << (1-neg))))) {
        cc = 1;
    } else if (m2 & (1 << (9-neg))) {
        /* assume normalized number */
        cc = 1;
    }
    /* FIXME: denormalized? */
    return cc;
}

/* square root 32-bit */
uint64_t HELPER(sqeb)(CPUS390XState *env, uint64_t f2)
{
    float32 ret = float32_sqrt(f2, &env->fpu_status);
    handle_exceptions(env, GETPC());
    return ret;
}

/* square root 64-bit */
uint64_t HELPER(sqdb)(CPUS390XState *env, uint64_t f2)
{
    float64 ret = float64_sqrt(f2, &env->fpu_status);
    handle_exceptions(env, GETPC());
    return ret;
}

/* square root 128-bit */
uint64_t HELPER(sqxb)(CPUS390XState *env, uint64_t ah, uint64_t al)
{
    float128 ret = float128_sqrt(make_float128(ah, al), &env->fpu_status);
    handle_exceptions(env, GETPC());
    return RET128(ret);
}
Commit	Line	Data
e72ca652 BS	1	/*
	2	* S/390 FPU helper routines
	3	*
	4	* Copyright (c) 2009 Ulrich Hecht
	5	* Copyright (c) 2009 Alexander Graf
	6	*
	7	* This library is free software; you can redistribute it and/or
	8	* modify it under the terms of the GNU Lesser General Public
	9	* License as published by the Free Software Foundation; either
	10	* version 2 of the License, or (at your option) any later version.
	11	*
	12	* This library is distributed in the hope that it will be useful,
	13	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	14	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
	15	* Lesser General Public License for more details.
	16	*
	17	* You should have received a copy of the GNU Lesser General Public
	18	* License along with this library; if not, see <http://www.gnu.org/licenses/>.
	19	*/
	20
	21	#include "cpu.h"
e72ca652 BS	22	#include "helper.h"
e72ca652 BS	23
19b0516f	24	#if !defined(CONFIG_USER_ONLY)
022c62cb	25	#include "exec/softmmu_exec.h"
e72ca652 BS	26	#endif
	27
	28	/* #define DEBUG_HELPER */
	29	#ifdef DEBUG_HELPER
	30	#define HELPER_LOG(x...) qemu_log(x)
	31	#else
	32	#define HELPER_LOG(x...)
	33	#endif
	34
587626f8 RH	35	#define RET128(F) (env->retxl = F.low, F.high)
	36
	37	#define convert_bit(mask, from, to) \
	38	(to < from \
	39	? (mask / (from / to)) & to \
	40	: (mask & from) * (to / from))
	41
	42	static void ieee_exception(CPUS390XState *env, uint32_t dxc, uintptr_t retaddr)
	43	{
	44	/* Install the DXC code. */
	45	env->fpc = (env->fpc & ~0xff00) \| (dxc << 8);
	46	/* Trap. */
	47	runtime_exception(env, PGM_DATA, retaddr);
	48	}
	49
	50	/* Should be called after any operation that may raise IEEE exceptions. */
	51	static void handle_exceptions(CPUS390XState *env, uintptr_t retaddr)
	52	{
	53	unsigned s390_exc, qemu_exc;
	54
	55	/* Get the exceptions raised by the current operation. Reset the
	56	fpu_status contents so that the next operation has a clean slate. */
	57	qemu_exc = env->fpu_status.float_exception_flags;
	58	if (qemu_exc == 0) {
	59	return;
	60	}
	61	env->fpu_status.float_exception_flags = 0;
	62
	63	/* Convert softfloat exception bits to s390 exception bits. */
	64	s390_exc = 0;
	65	s390_exc \|= convert_bit(qemu_exc, float_flag_invalid, 0x80);
	66	s390_exc \|= convert_bit(qemu_exc, float_flag_divbyzero, 0x40);
	67	s390_exc \|= convert_bit(qemu_exc, float_flag_overflow, 0x20);
	68	s390_exc \|= convert_bit(qemu_exc, float_flag_underflow, 0x10);
	69	s390_exc \|= convert_bit(qemu_exc, float_flag_inexact, 0x08);
	70
	71	/* Install the exceptions that we raised. */
	72	env->fpc \|= s390_exc << 16;
	73
	74	/* Send signals for enabled exceptions. */
	75	s390_exc &= env->fpc >> 24;
	76	if (s390_exc) {
	77	ieee_exception(env, s390_exc, retaddr);
	78	}
	79	}
	80
449c0d70	81	static inline int float_comp_to_cc(CPUS390XState *env, int float_compare)
e72ca652 BS	82	{
	83	switch (float_compare) {
	84	case float_relation_equal:
	85	return 0;
	86	case float_relation_less:
	87	return 1;
	88	case float_relation_greater:
	89	return 2;
	90	case float_relation_unordered:
	91	return 3;
	92	default:
	93	cpu_abort(env, "unknown return value for float compare\n");
	94	}
	95	}
	96
e72ca652 BS	97	/* condition codes for unary FP ops */
	98	uint32_t set_cc_nz_f32(float32 v)
	99	{
	100	if (float32_is_any_nan(v)) {
	101	return 3;
	102	} else if (float32_is_zero(v)) {
	103	return 0;
	104	} else if (float32_is_neg(v)) {
	105	return 1;
	106	} else {
	107	return 2;
	108	}
	109	}
	110
	111	uint32_t set_cc_nz_f64(float64 v)
	112	{
	113	if (float64_is_any_nan(v)) {
	114	return 3;
	115	} else if (float64_is_zero(v)) {
	116	return 0;
	117	} else if (float64_is_neg(v)) {
	118	return 1;
	119	} else {
	120	return 2;
	121	}
	122	}
	123
587626f8	124	uint32_t set_cc_nz_f128(float128 v)
e72ca652 BS	125	{
	126	if (float128_is_any_nan(v)) {
	127	return 3;
	128	} else if (float128_is_zero(v)) {
	129	return 0;
	130	} else if (float128_is_neg(v)) {
	131	return 1;
	132	} else {
	133	return 2;
	134	}
	135	}
	136
587626f8 RH	137	/* 32-bit FP addition */
587626f8 RH	138	uint64_t HELPER(aeb)(CPUS390XState *env, uint64_t f1, uint64_t f2)
e72ca652	139	{
587626f8 RH	140	float32 ret = float32_add(f1, f2, &env->fpu_status);
	141	handle_exceptions(env, GETPC());
	142	return ret;
e72ca652 BS	143	}
e72ca652 BS	144
587626f8 RH	145	/* 64-bit FP addition */
587626f8 RH	146	uint64_t HELPER(adb)(CPUS390XState *env, uint64_t f1, uint64_t f2)
e72ca652	147	{
587626f8 RH	148	float64 ret = float64_add(f1, f2, &env->fpu_status);
	149	handle_exceptions(env, GETPC());
	150	return ret;
	151	}
e72ca652	152
587626f8 RH	153	/* 128-bit FP addition */
	154	uint64_t HELPER(axb)(CPUS390XState *env, uint64_t ah, uint64_t al,
	155	uint64_t bh, uint64_t bl)
	156	{
	157	float128 ret = float128_add(make_float128(ah, al),
	158	make_float128(bh, bl),
	159	&env->fpu_status);
	160	handle_exceptions(env, GETPC());
	161	return RET128(ret);
e72ca652 BS	162	}
e72ca652 BS	163
1a800a2d RH	164	/* 32-bit FP subtraction */
1a800a2d RH	165	uint64_t HELPER(seb)(CPUS390XState *env, uint64_t f1, uint64_t f2)
e72ca652	166	{
1a800a2d RH	167	float32 ret = float32_sub(f1, f2, &env->fpu_status);
	168	handle_exceptions(env, GETPC());
	169	return ret;
e72ca652 BS	170	}
e72ca652 BS	171
1a800a2d RH	172	/* 64-bit FP subtraction */
1a800a2d RH	173	uint64_t HELPER(sdb)(CPUS390XState *env, uint64_t f1, uint64_t f2)
e72ca652	174	{
1a800a2d RH	175	float64 ret = float64_sub(f1, f2, &env->fpu_status);
	176	handle_exceptions(env, GETPC());
	177	return ret;
	178	}
e72ca652	179
1a800a2d RH	180	/* 128-bit FP subtraction */
	181	uint64_t HELPER(sxb)(CPUS390XState *env, uint64_t ah, uint64_t al,
	182	uint64_t bh, uint64_t bl)
	183	{
	184	float128 ret = float128_sub(make_float128(ah, al),
	185	make_float128(bh, bl),
	186	&env->fpu_status);
	187	handle_exceptions(env, GETPC());
	188	return RET128(ret);
e72ca652 BS	189	}
e72ca652 BS	190
f08a5c31 RH	191	/* 32-bit FP division */
f08a5c31 RH	192	uint64_t HELPER(deb)(CPUS390XState *env, uint64_t f1, uint64_t f2)
e72ca652	193	{
f08a5c31 RH	194	float32 ret = float32_div(f1, f2, &env->fpu_status);
	195	handle_exceptions(env, GETPC());
	196	return ret;
e72ca652 BS	197	}
e72ca652 BS	198
f08a5c31 RH	199	/* 64-bit FP division */
f08a5c31 RH	200	uint64_t HELPER(ddb)(CPUS390XState *env, uint64_t f1, uint64_t f2)
e72ca652	201	{
f08a5c31 RH	202	float64 ret = float64_div(f1, f2, &env->fpu_status);
	203	handle_exceptions(env, GETPC());
	204	return ret;
	205	}
e72ca652	206
f08a5c31 RH	207	/* 128-bit FP division */
	208	uint64_t HELPER(dxb)(CPUS390XState *env, uint64_t ah, uint64_t al,
	209	uint64_t bh, uint64_t bl)
	210	{
	211	float128 ret = float128_div(make_float128(ah, al),
	212	make_float128(bh, bl),
	213	&env->fpu_status);
	214	handle_exceptions(env, GETPC());
	215	return RET128(ret);
e72ca652 BS	216	}
e72ca652 BS	217
83b00736 RH	218	/* 32-bit FP multiplication */
83b00736 RH	219	uint64_t HELPER(meeb)(CPUS390XState *env, uint64_t f1, uint64_t f2)
e72ca652	220	{
83b00736 RH	221	float32 ret = float32_mul(f1, f2, &env->fpu_status);
	222	handle_exceptions(env, GETPC());
	223	return ret;
e72ca652 BS	224	}
e72ca652 BS	225
83b00736 RH	226	/* 64-bit FP multiplication */
83b00736 RH	227	uint64_t HELPER(mdb)(CPUS390XState *env, uint64_t f1, uint64_t f2)
e72ca652	228	{
83b00736 RH	229	float64 ret = float64_mul(f1, f2, &env->fpu_status);
	230	handle_exceptions(env, GETPC());
	231	return ret;
	232	}
e72ca652	233
83b00736 RH	234	/* 64/32-bit FP multiplication */
	235	uint64_t HELPER(mdeb)(CPUS390XState *env, uint64_t f1, uint64_t f2)
	236	{
	237	float64 ret = float32_to_float64(f2, &env->fpu_status);
	238	ret = float64_mul(f1, ret, &env->fpu_status);
	239	handle_exceptions(env, GETPC());
	240	return ret;
	241	}
	242
	243	/* 128-bit FP multiplication */
	244	uint64_t HELPER(mxb)(CPUS390XState *env, uint64_t ah, uint64_t al,
	245	uint64_t bh, uint64_t bl)
	246	{
	247	float128 ret = float128_mul(make_float128(ah, al),
	248	make_float128(bh, bl),
	249	&env->fpu_status);
	250	handle_exceptions(env, GETPC());
	251	return RET128(ret);
	252	}
	253
	254	/* 128/64-bit FP multiplication */
	255	uint64_t HELPER(mxdb)(CPUS390XState *env, uint64_t ah, uint64_t al,
	256	uint64_t f2)
	257	{
	258	float128 ret = float64_to_float128(f2, &env->fpu_status);
	259	ret = float128_mul(make_float128(ah, al), ret, &env->fpu_status);
	260	handle_exceptions(env, GETPC());
	261	return RET128(ret);
e72ca652 BS	262	}
	263
	264	/* convert 32-bit float to 64-bit float */
587626f8	265	uint64_t HELPER(ldeb)(CPUS390XState *env, uint64_t f2)
e72ca652	266	{
587626f8 RH	267	float64 ret = float32_to_float64(f2, &env->fpu_status);
	268	handle_exceptions(env, GETPC());
	269	return ret;
e72ca652 BS	270	}
	271
	272	/* convert 128-bit float to 64-bit float */
587626f8	273	uint64_t HELPER(ldxb)(CPUS390XState *env, uint64_t ah, uint64_t al)
e72ca652	274	{
587626f8 RH	275	float64 ret = float128_to_float64(make_float128(ah, al), &env->fpu_status);
	276	handle_exceptions(env, GETPC());
	277	return ret;
e72ca652 BS	278	}
	279
	280	/* convert 64-bit float to 128-bit float */
587626f8	281	uint64_t HELPER(lxdb)(CPUS390XState *env, uint64_t f2)
e72ca652	282	{
587626f8 RH	283	float128 ret = float64_to_float128(f2, &env->fpu_status);
	284	handle_exceptions(env, GETPC());
	285	return RET128(ret);
	286	}
e72ca652	287
587626f8 RH	288	/* convert 32-bit float to 128-bit float */
	289	uint64_t HELPER(lxeb)(CPUS390XState *env, uint64_t f2)
	290	{
	291	float128 ret = float32_to_float128(f2, &env->fpu_status);
	292	handle_exceptions(env, GETPC());
	293	return RET128(ret);
e72ca652 BS	294	}
	295
	296	/* convert 64-bit float to 32-bit float */
587626f8	297	uint64_t HELPER(ledb)(CPUS390XState *env, uint64_t f2)
e72ca652	298	{
587626f8 RH	299	float32 ret = float64_to_float32(f2, &env->fpu_status);
	300	handle_exceptions(env, GETPC());
	301	return ret;
e72ca652 BS	302	}
	303
	304	/* convert 128-bit float to 32-bit float */
587626f8	305	uint64_t HELPER(lexb)(CPUS390XState *env, uint64_t ah, uint64_t al)
e72ca652	306	{
587626f8 RH	307	float32 ret = float128_to_float32(make_float128(ah, al), &env->fpu_status);
	308	handle_exceptions(env, GETPC());
	309	return ret;
e72ca652 BS	310	}
e72ca652 BS	311
587626f8 RH	312	/* 32-bit FP compare */
587626f8 RH	313	uint32_t HELPER(ceb)(CPUS390XState *env, uint64_t f1, uint64_t f2)
e72ca652	314	{
587626f8 RH	315	int cmp = float32_compare_quiet(f1, f2, &env->fpu_status);
	316	handle_exceptions(env, GETPC());
	317	return float_comp_to_cc(env, cmp);
e72ca652 BS	318	}
e72ca652 BS	319
587626f8 RH	320	/* 64-bit FP compare */
587626f8 RH	321	uint32_t HELPER(cdb)(CPUS390XState *env, uint64_t f1, uint64_t f2)
e72ca652	322	{
587626f8 RH	323	int cmp = float64_compare_quiet(f1, f2, &env->fpu_status);
	324	handle_exceptions(env, GETPC());
	325	return float_comp_to_cc(env, cmp);
e72ca652 BS	326	}
e72ca652 BS	327
587626f8 RH	328	/* 128-bit FP compare */
	329	uint32_t HELPER(cxb)(CPUS390XState *env, uint64_t ah, uint64_t al,
	330	uint64_t bh, uint64_t bl)
e72ca652	331	{
587626f8 RH	332	int cmp = float128_compare_quiet(make_float128(ah, al),
	333	make_float128(bh, bl),
	334	&env->fpu_status);
	335	handle_exceptions(env, GETPC());
	336	return float_comp_to_cc(env, cmp);
e72ca652 BS	337	}
e72ca652 BS	338
68c8bd93	339	static int swap_round_mode(CPUS390XState *env, int m3)
e72ca652	340	{
68c8bd93	341	int ret = env->fpu_status.float_rounding_mode;
e72ca652 BS	342	switch (m3) {
	343	case 0:
	344	/* current mode */
	345	break;
	346	case 1:
	347	/* biased round no nearest */
	348	case 4:
	349	/* round to nearest */
	350	set_float_rounding_mode(float_round_nearest_even, &env->fpu_status);
	351	break;
	352	case 5:
	353	/* round to zero */
	354	set_float_rounding_mode(float_round_to_zero, &env->fpu_status);
	355	break;
	356	case 6:
	357	/* round to +inf */
	358	set_float_rounding_mode(float_round_up, &env->fpu_status);
	359	break;
	360	case 7:
	361	/* round to -inf */
	362	set_float_rounding_mode(float_round_down, &env->fpu_status);
	363	break;
	364	}
68c8bd93	365	return ret;
e72ca652 BS	366	}
e72ca652 BS	367
683bb9a8 RH	368	/* convert 64-bit int to 32-bit float */
	369	uint64_t HELPER(cegb)(CPUS390XState *env, int64_t v2, uint32_t m3)
	370	{
	371	int hold = swap_round_mode(env, m3);
	372	float32 ret = int64_to_float32(v2, &env->fpu_status);
	373	set_float_rounding_mode(hold, &env->fpu_status);
	374	handle_exceptions(env, GETPC());
	375	return ret;
	376	}
	377
	378	/* convert 64-bit int to 64-bit float */
	379	uint64_t HELPER(cdgb)(CPUS390XState *env, int64_t v2, uint32_t m3)
	380	{
	381	int hold = swap_round_mode(env, m3);
	382	float64 ret = int64_to_float64(v2, &env->fpu_status);
	383	set_float_rounding_mode(hold, &env->fpu_status);
	384	handle_exceptions(env, GETPC());
	385	return ret;
	386	}
	387
	388	/* convert 64-bit int to 128-bit float */
	389	uint64_t HELPER(cxgb)(CPUS390XState *env, int64_t v2, uint32_t m3)
	390	{
	391	int hold = swap_round_mode(env, m3);
	392	float128 ret = int64_to_float128(v2, &env->fpu_status);
	393	set_float_rounding_mode(hold, &env->fpu_status);
	394	handle_exceptions(env, GETPC());
	395	return RET128(ret);
	396	}
	397
e72ca652	398	/* convert 32-bit float to 64-bit int */
68c8bd93	399	uint64_t HELPER(cgeb)(CPUS390XState *env, uint64_t v2, uint32_t m3)
e72ca652	400	{
68c8bd93 RH	401	int hold = swap_round_mode(env, m3);
	402	int64_t ret = float32_to_int64(v2, &env->fpu_status);
	403	set_float_rounding_mode(hold, &env->fpu_status);
	404	handle_exceptions(env, GETPC());
	405	return ret;
e72ca652 BS	406	}
	407
	408	/* convert 64-bit float to 64-bit int */
68c8bd93	409	uint64_t HELPER(cgdb)(CPUS390XState *env, uint64_t v2, uint32_t m3)
e72ca652	410	{
68c8bd93 RH	411	int hold = swap_round_mode(env, m3);
	412	int64_t ret = float64_to_int64(v2, &env->fpu_status);
	413	set_float_rounding_mode(hold, &env->fpu_status);
	414	handle_exceptions(env, GETPC());
	415	return ret;
e72ca652 BS	416	}
	417
	418	/* convert 128-bit float to 64-bit int */
68c8bd93	419	uint64_t HELPER(cgxb)(CPUS390XState *env, uint64_t h, uint64_t l, uint32_t m3)
e72ca652	420	{
68c8bd93 RH	421	int hold = swap_round_mode(env, m3);
	422	float128 v2 = make_float128(h, l);
	423	int64_t ret = float128_to_int64(v2, &env->fpu_status);
	424	set_float_rounding_mode(hold, &env->fpu_status);
	425	handle_exceptions(env, GETPC());
	426	return ret;
e72ca652 BS	427	}
	428
	429	/* convert 32-bit float to 32-bit int */
68c8bd93	430	uint64_t HELPER(cfeb)(CPUS390XState *env, uint64_t v2, uint32_t m3)
e72ca652	431	{
68c8bd93 RH	432	int hold = swap_round_mode(env, m3);
	433	int32_t ret = float32_to_int32(v2, &env->fpu_status);
	434	set_float_rounding_mode(hold, &env->fpu_status);
	435	handle_exceptions(env, GETPC());
	436	return ret;
e72ca652 BS	437	}
	438
	439	/* convert 64-bit float to 32-bit int */
68c8bd93	440	uint64_t HELPER(cfdb)(CPUS390XState *env, uint64_t v2, uint32_t m3)
e72ca652	441	{
68c8bd93 RH	442	int hold = swap_round_mode(env, m3);
	443	int32_t ret = float64_to_int32(v2, &env->fpu_status);
	444	set_float_rounding_mode(hold, &env->fpu_status);
	445	handle_exceptions(env, GETPC());
	446	return ret;
e72ca652 BS	447	}
	448
	449	/* convert 128-bit float to 32-bit int */
68c8bd93	450	uint64_t HELPER(cfxb)(CPUS390XState *env, uint64_t h, uint64_t l, uint32_t m3)
e72ca652	451	{
68c8bd93 RH	452	int hold = swap_round_mode(env, m3);
	453	float128 v2 = make_float128(h, l);
	454	int32_t ret = float128_to_int32(v2, &env->fpu_status);
	455	set_float_rounding_mode(hold, &env->fpu_status);
	456	handle_exceptions(env, GETPC());
	457	return ret;
e72ca652 BS	458	}
e72ca652 BS	459
722bfec3 RH	460	/* 32-bit FP multiply and add */
	461	uint64_t HELPER(maeb)(CPUS390XState *env, uint64_t f1,
	462	uint64_t f2, uint64_t f3)
e72ca652	463	{
722bfec3 RH	464	float32 ret = float32_muladd(f2, f3, f1, 0, &env->fpu_status);
	465	handle_exceptions(env, GETPC());
	466	return ret;
e72ca652 BS	467	}
e72ca652 BS	468
722bfec3 RH	469	/* 64-bit FP multiply and add */
	470	uint64_t HELPER(madb)(CPUS390XState *env, uint64_t f1,
	471	uint64_t f2, uint64_t f3)
e72ca652	472	{
722bfec3 RH	473	float64 ret = float64_muladd(f2, f3, f1, 0, &env->fpu_status);
	474	handle_exceptions(env, GETPC());
	475	return ret;
e72ca652 BS	476	}
e72ca652 BS	477
722bfec3 RH	478	/* 32-bit FP multiply and subtract */
	479	uint64_t HELPER(mseb)(CPUS390XState *env, uint64_t f1,
	480	uint64_t f2, uint64_t f3)
e72ca652	481	{
722bfec3 RH	482	float32 ret = float32_muladd(f2, f3, f1, float_muladd_negate_c,
	483	&env->fpu_status);
	484	handle_exceptions(env, GETPC());
	485	return ret;
e72ca652 BS	486	}
e72ca652 BS	487
722bfec3 RH	488	/* 64-bit FP multiply and subtract */
	489	uint64_t HELPER(msdb)(CPUS390XState *env, uint64_t f1,
	490	uint64_t f2, uint64_t f3)
e72ca652	491	{
722bfec3 RH	492	float64 ret = float64_muladd(f2, f3, f1, float_muladd_negate_c,
	493	&env->fpu_status);
	494	handle_exceptions(env, GETPC());
	495	return ret;
e72ca652 BS	496	}
e72ca652 BS	497
e72ca652	498	/* test data class 32-bit */
31aa97d1	499	uint32_t HELPER(tceb)(uint64_t f1, uint64_t m2)
e72ca652	500	{
31aa97d1	501	float32 v1 = f1;
e72ca652 BS	502	int neg = float32_is_neg(v1);
	503	uint32_t cc = 0;
	504
e72ca652 BS	505	if ((float32_is_zero(v1) && (m2 & (1 << (11-neg)))) \|\|
	506	(float32_is_infinity(v1) && (m2 & (1 << (5-neg)))) \|\|
	507	(float32_is_any_nan(v1) && (m2 & (1 << (3-neg)))) \|\|
	508	(float32_is_signaling_nan(v1) && (m2 & (1 << (1-neg))))) {
	509	cc = 1;
	510	} else if (m2 & (1 << (9-neg))) {
	511	/* assume normalized number */
	512	cc = 1;
	513	}
e72ca652 BS	514	/* FIXME: denormalized? */
	515	return cc;
	516	}
	517
	518	/* test data class 64-bit */
31aa97d1	519	uint32_t HELPER(tcdb)(uint64_t v1, uint64_t m2)
e72ca652	520	{
e72ca652 BS	521	int neg = float64_is_neg(v1);
	522	uint32_t cc = 0;
	523
e72ca652 BS	524	if ((float64_is_zero(v1) && (m2 & (1 << (11-neg)))) \|\|
	525	(float64_is_infinity(v1) && (m2 & (1 << (5-neg)))) \|\|
	526	(float64_is_any_nan(v1) && (m2 & (1 << (3-neg)))) \|\|
	527	(float64_is_signaling_nan(v1) && (m2 & (1 << (1-neg))))) {
	528	cc = 1;
	529	} else if (m2 & (1 << (9-neg))) {
	530	/* assume normalized number */
	531	cc = 1;
	532	}
	533	/* FIXME: denormalized? */
	534	return cc;
	535	}
	536
	537	/* test data class 128-bit */
31aa97d1	538	uint32_t HELPER(tcxb)(uint64_t ah, uint64_t al, uint64_t m2)
e72ca652	539	{
31aa97d1 RH	540	float128 v1 = make_float128(ah, al);
31aa97d1 RH	541	int neg = float128_is_neg(v1);
e72ca652	542	uint32_t cc = 0;
e72ca652	543
31aa97d1 RH	544	if ((float128_is_zero(v1) && (m2 & (1 << (11-neg)))) \|\|
	545	(float128_is_infinity(v1) && (m2 & (1 << (5-neg)))) \|\|
	546	(float128_is_any_nan(v1) && (m2 & (1 << (3-neg)))) \|\|
	547	(float128_is_signaling_nan(v1) && (m2 & (1 << (1-neg))))) {
e72ca652 BS	548	cc = 1;
	549	} else if (m2 & (1 << (9-neg))) {
	550	/* assume normalized number */
	551	cc = 1;
	552	}
	553	/* FIXME: denormalized? */
	554	return cc;
	555	}
	556
16d7b2a4 RH	557	/* square root 32-bit */
16d7b2a4 RH	558	uint64_t HELPER(sqeb)(CPUS390XState *env, uint64_t f2)
e72ca652	559	{
16d7b2a4 RH	560	float32 ret = float32_sqrt(f2, &env->fpu_status);
	561	handle_exceptions(env, GETPC());
	562	return ret;
	563	}
	564
	565	/* square root 64-bit */
	566	uint64_t HELPER(sqdb)(CPUS390XState *env, uint64_t f2)
	567	{
	568	float64 ret = float64_sqrt(f2, &env->fpu_status);
	569	handle_exceptions(env, GETPC());
	570	return ret;
	571	}
	572
	573	/* square root 128-bit */
	574	uint64_t HELPER(sqxb)(CPUS390XState *env, uint64_t ah, uint64_t al)
	575	{
	576	float128 ret = float128_sqrt(make_float128(ah, al), &env->fpu_status);
	577	handle_exceptions(env, GETPC());
	578	return RET128(ret);
e72ca652	579	}