target/s390x/vec_helper.c


1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193

/*
 * QEMU TCG support -- s390x vector support instructions
 *
 * Copyright (C) 2019 Red Hat Inc
 *
 * Authors:
 *   David Hildenbrand <david@redhat.com>
 *
 * This work is licensed under the terms of the GNU GPL, version 2 or later.
 * See the COPYING file in the top-level directory.
 */
#include "qemu/osdep.h"
#include "qemu-common.h"
#include "cpu.h"
#include "internal.h"
#include "vec.h"
#include "tcg/tcg.h"
#include "tcg/tcg-gvec-desc.h"
#include "exec/helper-proto.h"
#include "exec/cpu_ldst.h"
#include "exec/exec-all.h"

void HELPER(vll)(CPUS390XState *env, void *v1, uint64_t addr, uint64_t bytes)
{
    if (likely(bytes >= 16)) {
        uint64_t t0, t1;

        t0 = cpu_ldq_data_ra(env, addr, GETPC());
        addr = wrap_address(env, addr + 8);
        t1 = cpu_ldq_data_ra(env, addr, GETPC());
        s390_vec_write_element64(v1, 0, t0);
        s390_vec_write_element64(v1, 1, t1);
    } else {
        S390Vector tmp = {};
        int i;

        for (i = 0; i < bytes; i++) {
            uint8_t byte = cpu_ldub_data_ra(env, addr, GETPC());

            s390_vec_write_element8(&tmp, i, byte);
            addr = wrap_address(env, addr + 1);
        }
        *(S390Vector *)v1 = tmp;
    }
}

#define DEF_VPK_HFN(BITS, TBITS)                                               \
typedef uint##TBITS##_t (*vpk##BITS##_fn)(uint##BITS##_t, int *);              \
static int vpk##BITS##_hfn(S390Vector *v1, const S390Vector *v2,               \
                           const S390Vector *v3, vpk##BITS##_fn fn)            \
{                                                                              \
    int i, saturated = 0;                                                      \
    S390Vector tmp;                                                            \
                                                                               \
    for (i = 0; i < (128 / TBITS); i++) {                                      \
        uint##BITS##_t src;                                                    \
                                                                               \
        if (i < (128 / BITS)) {                                                \
            src = s390_vec_read_element##BITS(v2, i);                          \
        } else {                                                               \
            src = s390_vec_read_element##BITS(v3, i - (128 / BITS));           \
        }                                                                      \
        s390_vec_write_element##TBITS(&tmp, i, fn(src, &saturated));           \
    }                                                                          \
    *v1 = tmp;                                                                 \
    return saturated;                                                          \
}
DEF_VPK_HFN(64, 32)
DEF_VPK_HFN(32, 16)
DEF_VPK_HFN(16, 8)

#define DEF_VPK(BITS, TBITS)                                                   \
static uint##TBITS##_t vpk##BITS##e(uint##BITS##_t src, int *saturated)        \
{                                                                              \
    return src;                                                                \
}                                                                              \
void HELPER(gvec_vpk##BITS)(void *v1, const void *v2, const void *v3,          \
                            uint32_t desc)                                     \
{                                                                              \
    vpk##BITS##_hfn(v1, v2, v3, vpk##BITS##e);                                 \
}
DEF_VPK(64, 32)
DEF_VPK(32, 16)
DEF_VPK(16, 8)

#define DEF_VPKS(BITS, TBITS)                                                  \
static uint##TBITS##_t vpks##BITS##e(uint##BITS##_t src, int *saturated)       \
{                                                                              \
    if ((int##BITS##_t)src > INT##TBITS##_MAX) {                               \
        (*saturated)++;                                                        \
        return INT##TBITS##_MAX;                                               \
    } else if ((int##BITS##_t)src < INT##TBITS##_MIN) {                        \
        (*saturated)++;                                                        \
        return INT##TBITS##_MIN;                                               \
    }                                                                          \
    return src;                                                                \
}                                                                              \
void HELPER(gvec_vpks##BITS)(void *v1, const void *v2, const void *v3,         \
                             uint32_t desc)                                    \
{                                                                              \
    vpk##BITS##_hfn(v1, v2, v3, vpks##BITS##e);                                \
}                                                                              \
void HELPER(gvec_vpks_cc##BITS)(void *v1, const void *v2, const void *v3,      \
                                CPUS390XState *env, uint32_t desc)             \
{                                                                              \
    int saturated = vpk##BITS##_hfn(v1, v2, v3, vpks##BITS##e);                \
                                                                               \
    if (saturated == (128 / TBITS)) {                                          \
        env->cc_op = 3;                                                        \
    } else if (saturated) {                                                    \
        env->cc_op = 1;                                                        \
    } else {                                                                   \
        env->cc_op = 0;                                                        \
    }                                                                          \
}
DEF_VPKS(64, 32)
DEF_VPKS(32, 16)
DEF_VPKS(16, 8)

#define DEF_VPKLS(BITS, TBITS)                                                 \
static uint##TBITS##_t vpkls##BITS##e(uint##BITS##_t src, int *saturated)      \
{                                                                              \
    if (src > UINT##TBITS##_MAX) {                                             \
        (*saturated)++;                                                        \
        return UINT##TBITS##_MAX;                                              \
    }                                                                          \
    return src;                                                                \
}                                                                              \
void HELPER(gvec_vpkls##BITS)(void *v1, const void *v2, const void *v3,        \
                              uint32_t desc)                                   \
{                                                                              \
    vpk##BITS##_hfn(v1, v2, v3, vpkls##BITS##e);                               \
}                                                                              \
void HELPER(gvec_vpkls_cc##BITS)(void *v1, const void *v2, const void *v3,     \
                                 CPUS390XState *env, uint32_t desc)            \
{                                                                              \
    int saturated = vpk##BITS##_hfn(v1, v2, v3, vpkls##BITS##e);               \
                                                                               \
    if (saturated == (128 / TBITS)) {                                          \
        env->cc_op = 3;                                                        \
    } else if (saturated) {                                                    \
        env->cc_op = 1;                                                        \
    } else {                                                                   \
        env->cc_op = 0;                                                        \
    }                                                                          \
}
DEF_VPKLS(64, 32)
DEF_VPKLS(32, 16)
DEF_VPKLS(16, 8)

void HELPER(gvec_vperm)(void *v1, const void *v2, const void *v3,
                        const void *v4, uint32_t desc)
{
    S390Vector tmp;
    int i;

    for (i = 0; i < 16; i++) {
        const uint8_t selector = s390_vec_read_element8(v4, i) & 0x1f;
        uint8_t byte;

        if (selector < 16) {
            byte = s390_vec_read_element8(v2, selector);
        } else {
            byte = s390_vec_read_element8(v3, selector - 16);
        }
        s390_vec_write_element8(&tmp, i, byte);
    }
    *(S390Vector *)v1 = tmp;
}

void HELPER(vstl)(CPUS390XState *env, const void *v1, uint64_t addr,
                  uint64_t bytes)
{
    /* Probe write access before actually modifying memory */
    probe_write_access(env, addr, bytes, GETPC());

    if (likely(bytes >= 16)) {
        cpu_stq_data_ra(env, addr, s390_vec_read_element64(v1, 0), GETPC());
        addr = wrap_address(env, addr + 8);
        cpu_stq_data_ra(env, addr, s390_vec_read_element64(v1, 1), GETPC());
    } else {
        S390Vector tmp = {};
        int i;

        for (i = 0; i < bytes; i++) {
            uint8_t byte = s390_vec_read_element8(v1, i);

            cpu_stb_data_ra(env, addr, byte, GETPC());
            addr = wrap_address(env, addr + 1);
        }
        *(S390Vector *)v1 = tmp;
    }
}