617 lines
31 KiB
C
617 lines
31 KiB
C
/*
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* QEMU TCG support -- s390x vector integer instruction support
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*
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* Copyright (C) 2019 Red Hat Inc
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*
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* Authors:
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* David Hildenbrand <david@redhat.com>
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*
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* This work is licensed under the terms of the GNU GPL, version 2 or later.
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* See the COPYING file in the top-level directory.
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*/
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#include "qemu/osdep.h"
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#include "qemu-common.h"
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#include "cpu.h"
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#include "vec.h"
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#include "exec/helper-proto.h"
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#include "tcg/tcg-gvec-desc.h"
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static bool s390_vec_is_zero(const S390Vector *v)
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{
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return !v->doubleword[0] && !v->doubleword[1];
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}
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static void s390_vec_xor(S390Vector *res, const S390Vector *a,
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const S390Vector *b)
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{
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res->doubleword[0] = a->doubleword[0] ^ b->doubleword[0];
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res->doubleword[1] = a->doubleword[1] ^ b->doubleword[1];
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}
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static void s390_vec_and(S390Vector *res, const S390Vector *a,
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const S390Vector *b)
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{
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res->doubleword[0] = a->doubleword[0] & b->doubleword[0];
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res->doubleword[1] = a->doubleword[1] & b->doubleword[1];
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}
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static bool s390_vec_equal(const S390Vector *a, const S390Vector *b)
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{
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return a->doubleword[0] == b->doubleword[0] &&
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a->doubleword[1] == b->doubleword[1];
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}
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static void s390_vec_shl(S390Vector *d, const S390Vector *a, uint64_t count)
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{
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uint64_t tmp;
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g_assert(count < 128);
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if (count == 0) {
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d->doubleword[0] = a->doubleword[0];
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d->doubleword[1] = a->doubleword[1];
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} else if (count == 64) {
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d->doubleword[0] = a->doubleword[1];
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d->doubleword[1] = 0;
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} else if (count < 64) {
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tmp = extract64(a->doubleword[1], 64 - count, count);
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d->doubleword[1] = a->doubleword[1] << count;
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d->doubleword[0] = (a->doubleword[0] << count) | tmp;
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} else {
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d->doubleword[0] = a->doubleword[1] << (count - 64);
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d->doubleword[1] = 0;
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}
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}
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static void s390_vec_sar(S390Vector *d, const S390Vector *a, uint64_t count)
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{
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uint64_t tmp;
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if (count == 0) {
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d->doubleword[0] = a->doubleword[0];
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d->doubleword[1] = a->doubleword[1];
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} else if (count == 64) {
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d->doubleword[1] = a->doubleword[0];
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d->doubleword[0] = 0;
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} else if (count < 64) {
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tmp = a->doubleword[1] >> count;
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d->doubleword[1] = deposit64(tmp, 64 - count, count, a->doubleword[0]);
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d->doubleword[0] = (int64_t)a->doubleword[0] >> count;
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} else {
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d->doubleword[1] = (int64_t)a->doubleword[0] >> (count - 64);
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d->doubleword[0] = 0;
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}
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}
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static void s390_vec_shr(S390Vector *d, const S390Vector *a, uint64_t count)
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{
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uint64_t tmp;
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g_assert(count < 128);
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if (count == 0) {
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d->doubleword[0] = a->doubleword[0];
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d->doubleword[1] = a->doubleword[1];
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} else if (count == 64) {
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d->doubleword[1] = a->doubleword[0];
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d->doubleword[0] = 0;
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} else if (count < 64) {
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tmp = a->doubleword[1] >> count;
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d->doubleword[1] = deposit64(tmp, 64 - count, count, a->doubleword[0]);
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d->doubleword[0] = a->doubleword[0] >> count;
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} else {
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d->doubleword[1] = a->doubleword[0] >> (count - 64);
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d->doubleword[0] = 0;
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}
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}
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#define DEF_VAVG(BITS) \
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void HELPER(gvec_vavg##BITS)(void *v1, const void *v2, const void *v3, \
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uint32_t desc) \
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{ \
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int i; \
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\
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for (i = 0; i < (128 / BITS); i++) { \
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const int32_t a = (int##BITS##_t)s390_vec_read_element##BITS(v2, i); \
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const int32_t b = (int##BITS##_t)s390_vec_read_element##BITS(v3, i); \
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\
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s390_vec_write_element##BITS(v1, i, (a + b + 1) >> 1); \
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} \
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}
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DEF_VAVG(8)
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DEF_VAVG(16)
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#define DEF_VAVGL(BITS) \
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void HELPER(gvec_vavgl##BITS)(void *v1, const void *v2, const void *v3, \
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uint32_t desc) \
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{ \
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int i; \
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\
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for (i = 0; i < (128 / BITS); i++) { \
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const uint##BITS##_t a = s390_vec_read_element##BITS(v2, i); \
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const uint##BITS##_t b = s390_vec_read_element##BITS(v3, i); \
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\
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s390_vec_write_element##BITS(v1, i, (a + b + 1) >> 1); \
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} \
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}
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DEF_VAVGL(8)
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DEF_VAVGL(16)
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#define DEF_VCLZ(BITS) \
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void HELPER(gvec_vclz##BITS)(void *v1, const void *v2, uint32_t desc) \
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{ \
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int i; \
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\
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for (i = 0; i < (128 / BITS); i++) { \
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const uint##BITS##_t a = s390_vec_read_element##BITS(v2, i); \
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\
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s390_vec_write_element##BITS(v1, i, clz32(a) - 32 + BITS); \
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} \
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}
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DEF_VCLZ(8)
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DEF_VCLZ(16)
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#define DEF_VCTZ(BITS) \
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void HELPER(gvec_vctz##BITS)(void *v1, const void *v2, uint32_t desc) \
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{ \
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int i; \
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\
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for (i = 0; i < (128 / BITS); i++) { \
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const uint##BITS##_t a = s390_vec_read_element##BITS(v2, i); \
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\
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s390_vec_write_element##BITS(v1, i, a ? ctz32(a) : BITS); \
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} \
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}
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DEF_VCTZ(8)
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DEF_VCTZ(16)
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/* like binary multiplication, but XOR instead of addition */
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#define DEF_GALOIS_MULTIPLY(BITS, TBITS) \
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static uint##TBITS##_t galois_multiply##BITS(uint##TBITS##_t a, \
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uint##TBITS##_t b) \
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{ \
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uint##TBITS##_t res = 0; \
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\
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while (b) { \
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if (b & 0x1) { \
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res = res ^ a; \
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} \
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a = a << 1; \
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b = b >> 1; \
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} \
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return res; \
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}
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DEF_GALOIS_MULTIPLY(8, 16)
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DEF_GALOIS_MULTIPLY(16, 32)
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DEF_GALOIS_MULTIPLY(32, 64)
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static S390Vector galois_multiply64(uint64_t a, uint64_t b)
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{
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S390Vector res = {};
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S390Vector va = {
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.doubleword[1] = a,
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};
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S390Vector vb = {
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.doubleword[1] = b,
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};
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while (!s390_vec_is_zero(&vb)) {
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if (vb.doubleword[1] & 0x1) {
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s390_vec_xor(&res, &res, &va);
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}
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s390_vec_shl(&va, &va, 1);
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s390_vec_shr(&vb, &vb, 1);
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}
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return res;
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}
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#define DEF_VGFM(BITS, TBITS) \
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void HELPER(gvec_vgfm##BITS)(void *v1, const void *v2, const void *v3, \
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uint32_t desc) \
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{ \
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int i; \
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\
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for (i = 0; i < (128 / TBITS); i++) { \
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uint##BITS##_t a = s390_vec_read_element##BITS(v2, i * 2); \
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uint##BITS##_t b = s390_vec_read_element##BITS(v3, i * 2); \
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uint##TBITS##_t d = galois_multiply##BITS(a, b); \
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\
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a = s390_vec_read_element##BITS(v2, i * 2 + 1); \
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b = s390_vec_read_element##BITS(v3, i * 2 + 1); \
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d = d ^ galois_multiply32(a, b); \
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s390_vec_write_element##TBITS(v1, i, d); \
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} \
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}
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DEF_VGFM(8, 16)
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DEF_VGFM(16, 32)
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DEF_VGFM(32, 64)
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void HELPER(gvec_vgfm64)(void *v1, const void *v2, const void *v3,
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uint32_t desc)
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{
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S390Vector tmp1, tmp2;
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uint64_t a, b;
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a = s390_vec_read_element64(v2, 0);
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b = s390_vec_read_element64(v3, 0);
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tmp1 = galois_multiply64(a, b);
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a = s390_vec_read_element64(v2, 1);
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b = s390_vec_read_element64(v3, 1);
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tmp2 = galois_multiply64(a, b);
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s390_vec_xor(v1, &tmp1, &tmp2);
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}
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#define DEF_VGFMA(BITS, TBITS) \
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void HELPER(gvec_vgfma##BITS)(void *v1, const void *v2, const void *v3, \
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const void *v4, uint32_t desc) \
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{ \
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int i; \
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\
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for (i = 0; i < (128 / TBITS); i++) { \
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uint##BITS##_t a = s390_vec_read_element##BITS(v2, i * 2); \
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uint##BITS##_t b = s390_vec_read_element##BITS(v3, i * 2); \
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uint##TBITS##_t d = galois_multiply##BITS(a, b); \
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\
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a = s390_vec_read_element##BITS(v2, i * 2 + 1); \
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b = s390_vec_read_element##BITS(v3, i * 2 + 1); \
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d = d ^ galois_multiply32(a, b); \
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d = d ^ s390_vec_read_element##TBITS(v4, i); \
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s390_vec_write_element##TBITS(v1, i, d); \
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} \
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}
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DEF_VGFMA(8, 16)
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DEF_VGFMA(16, 32)
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DEF_VGFMA(32, 64)
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void HELPER(gvec_vgfma64)(void *v1, const void *v2, const void *v3,
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const void *v4, uint32_t desc)
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{
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S390Vector tmp1, tmp2;
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uint64_t a, b;
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a = s390_vec_read_element64(v2, 0);
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b = s390_vec_read_element64(v3, 0);
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tmp1 = galois_multiply64(a, b);
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a = s390_vec_read_element64(v2, 1);
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b = s390_vec_read_element64(v3, 1);
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tmp2 = galois_multiply64(a, b);
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s390_vec_xor(&tmp1, &tmp1, &tmp2);
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s390_vec_xor(v1, &tmp1, v4);
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}
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#define DEF_VMAL(BITS) \
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void HELPER(gvec_vmal##BITS)(void *v1, const void *v2, const void *v3, \
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const void *v4, uint32_t desc) \
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{ \
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int i; \
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\
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for (i = 0; i < (128 / BITS); i++) { \
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const uint##BITS##_t a = s390_vec_read_element##BITS(v2, i); \
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const uint##BITS##_t b = s390_vec_read_element##BITS(v3, i); \
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const uint##BITS##_t c = s390_vec_read_element##BITS(v4, i); \
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\
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s390_vec_write_element##BITS(v1, i, a * b + c); \
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} \
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}
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DEF_VMAL(8)
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DEF_VMAL(16)
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#define DEF_VMAH(BITS) \
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void HELPER(gvec_vmah##BITS)(void *v1, const void *v2, const void *v3, \
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const void *v4, uint32_t desc) \
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{ \
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int i; \
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\
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for (i = 0; i < (128 / BITS); i++) { \
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const int32_t a = (int##BITS##_t)s390_vec_read_element##BITS(v2, i); \
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const int32_t b = (int##BITS##_t)s390_vec_read_element##BITS(v3, i); \
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const int32_t c = (int##BITS##_t)s390_vec_read_element##BITS(v4, i); \
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\
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s390_vec_write_element##BITS(v1, i, (a * b + c) >> BITS); \
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} \
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}
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DEF_VMAH(8)
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DEF_VMAH(16)
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#define DEF_VMALH(BITS) \
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void HELPER(gvec_vmalh##BITS)(void *v1, const void *v2, const void *v3, \
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const void *v4, uint32_t desc) \
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{ \
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int i; \
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\
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for (i = 0; i < (128 / BITS); i++) { \
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const uint##BITS##_t a = s390_vec_read_element##BITS(v2, i); \
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const uint##BITS##_t b = s390_vec_read_element##BITS(v3, i); \
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const uint##BITS##_t c = s390_vec_read_element##BITS(v4, i); \
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\
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s390_vec_write_element##BITS(v1, i, (a * b + c) >> BITS); \
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} \
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}
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DEF_VMALH(8)
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DEF_VMALH(16)
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#define DEF_VMAE(BITS, TBITS) \
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void HELPER(gvec_vmae##BITS)(void *v1, const void *v2, const void *v3, \
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const void *v4, uint32_t desc) \
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{ \
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int i, j; \
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\
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for (i = 0, j = 0; i < (128 / TBITS); i++, j += 2) { \
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int##TBITS##_t a = (int##BITS##_t)s390_vec_read_element##BITS(v2, j); \
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int##TBITS##_t b = (int##BITS##_t)s390_vec_read_element##BITS(v3, j); \
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int##TBITS##_t c = (int##BITS##_t)s390_vec_read_element##BITS(v4, j); \
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\
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s390_vec_write_element##TBITS(v1, i, a * b + c); \
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} \
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}
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DEF_VMAE(8, 16)
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DEF_VMAE(16, 32)
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DEF_VMAE(32, 64)
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#define DEF_VMALE(BITS, TBITS) \
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void HELPER(gvec_vmale##BITS)(void *v1, const void *v2, const void *v3, \
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const void *v4, uint32_t desc) \
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{ \
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int i, j; \
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\
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for (i = 0, j = 0; i < (128 / TBITS); i++, j += 2) { \
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uint##TBITS##_t a = s390_vec_read_element##BITS(v2, j); \
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uint##TBITS##_t b = s390_vec_read_element##BITS(v3, j); \
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uint##TBITS##_t c = s390_vec_read_element##BITS(v4, j); \
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\
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s390_vec_write_element##TBITS(v1, i, a * b + c); \
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} \
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}
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DEF_VMALE(8, 16)
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DEF_VMALE(16, 32)
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DEF_VMALE(32, 64)
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#define DEF_VMAO(BITS, TBITS) \
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void HELPER(gvec_vmao##BITS)(void *v1, const void *v2, const void *v3, \
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const void *v4, uint32_t desc) \
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{ \
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int i, j; \
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\
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for (i = 0, j = 1; i < (128 / TBITS); i++, j += 2) { \
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int##TBITS##_t a = (int##BITS##_t)s390_vec_read_element##BITS(v2, j); \
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int##TBITS##_t b = (int##BITS##_t)s390_vec_read_element##BITS(v3, j); \
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int##TBITS##_t c = (int##BITS##_t)s390_vec_read_element##BITS(v4, j); \
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\
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s390_vec_write_element##TBITS(v1, i, a * b + c); \
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} \
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}
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DEF_VMAO(8, 16)
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DEF_VMAO(16, 32)
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DEF_VMAO(32, 64)
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#define DEF_VMALO(BITS, TBITS) \
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void HELPER(gvec_vmalo##BITS)(void *v1, const void *v2, const void *v3, \
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const void *v4, uint32_t desc) \
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{ \
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int i, j; \
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\
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for (i = 0, j = 1; i < (128 / TBITS); i++, j += 2) { \
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uint##TBITS##_t a = s390_vec_read_element##BITS(v2, j); \
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uint##TBITS##_t b = s390_vec_read_element##BITS(v3, j); \
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uint##TBITS##_t c = s390_vec_read_element##BITS(v4, j); \
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\
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s390_vec_write_element##TBITS(v1, i, a * b + c); \
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} \
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}
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DEF_VMALO(8, 16)
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DEF_VMALO(16, 32)
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DEF_VMALO(32, 64)
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#define DEF_VMH(BITS) \
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void HELPER(gvec_vmh##BITS)(void *v1, const void *v2, const void *v3, \
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uint32_t desc) \
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{ \
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int i; \
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\
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for (i = 0; i < (128 / BITS); i++) { \
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const int32_t a = (int##BITS##_t)s390_vec_read_element##BITS(v2, i); \
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const int32_t b = (int##BITS##_t)s390_vec_read_element##BITS(v3, i); \
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\
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s390_vec_write_element##BITS(v1, i, (a * b) >> BITS); \
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} \
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}
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DEF_VMH(8)
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DEF_VMH(16)
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#define DEF_VMLH(BITS) \
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void HELPER(gvec_vmlh##BITS)(void *v1, const void *v2, const void *v3, \
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uint32_t desc) \
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{ \
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int i; \
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\
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for (i = 0; i < (128 / BITS); i++) { \
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const uint##BITS##_t a = s390_vec_read_element##BITS(v2, i); \
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const uint##BITS##_t b = s390_vec_read_element##BITS(v3, i); \
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\
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s390_vec_write_element##BITS(v1, i, (a * b) >> BITS); \
|
|
} \
|
|
}
|
|
DEF_VMLH(8)
|
|
DEF_VMLH(16)
|
|
|
|
#define DEF_VME(BITS, TBITS) \
|
|
void HELPER(gvec_vme##BITS)(void *v1, const void *v2, const void *v3, \
|
|
uint32_t desc) \
|
|
{ \
|
|
int i, j; \
|
|
\
|
|
for (i = 0, j = 0; i < (128 / TBITS); i++, j += 2) { \
|
|
int##TBITS##_t a = (int##BITS##_t)s390_vec_read_element##BITS(v2, j); \
|
|
int##TBITS##_t b = (int##BITS##_t)s390_vec_read_element##BITS(v3, j); \
|
|
\
|
|
s390_vec_write_element##TBITS(v1, i, a * b); \
|
|
} \
|
|
}
|
|
DEF_VME(8, 16)
|
|
DEF_VME(16, 32)
|
|
DEF_VME(32, 64)
|
|
|
|
#define DEF_VMLE(BITS, TBITS) \
|
|
void HELPER(gvec_vmle##BITS)(void *v1, const void *v2, const void *v3, \
|
|
uint32_t desc) \
|
|
{ \
|
|
int i, j; \
|
|
\
|
|
for (i = 0, j = 0; i < (128 / TBITS); i++, j += 2) { \
|
|
const uint##TBITS##_t a = s390_vec_read_element##BITS(v2, j); \
|
|
const uint##TBITS##_t b = s390_vec_read_element##BITS(v3, j); \
|
|
\
|
|
s390_vec_write_element##TBITS(v1, i, a * b); \
|
|
} \
|
|
}
|
|
DEF_VMLE(8, 16)
|
|
DEF_VMLE(16, 32)
|
|
DEF_VMLE(32, 64)
|
|
|
|
#define DEF_VMO(BITS, TBITS) \
|
|
void HELPER(gvec_vmo##BITS)(void *v1, const void *v2, const void *v3, \
|
|
uint32_t desc) \
|
|
{ \
|
|
int i, j; \
|
|
\
|
|
for (i = 0, j = 1; i < (128 / TBITS); i++, j += 2) { \
|
|
int##TBITS##_t a = (int##BITS##_t)s390_vec_read_element##BITS(v2, j); \
|
|
int##TBITS##_t b = (int##BITS##_t)s390_vec_read_element##BITS(v3, j); \
|
|
\
|
|
s390_vec_write_element##TBITS(v1, i, a * b); \
|
|
} \
|
|
}
|
|
DEF_VMO(8, 16)
|
|
DEF_VMO(16, 32)
|
|
DEF_VMO(32, 64)
|
|
|
|
#define DEF_VMLO(BITS, TBITS) \
|
|
void HELPER(gvec_vmlo##BITS)(void *v1, const void *v2, const void *v3, \
|
|
uint32_t desc) \
|
|
{ \
|
|
int i, j; \
|
|
\
|
|
for (i = 0, j = 0; i < (128 / TBITS); i++, j += 2) { \
|
|
const uint##TBITS##_t a = s390_vec_read_element##BITS(v2, j); \
|
|
const uint##TBITS##_t b = s390_vec_read_element##BITS(v3, j); \
|
|
\
|
|
s390_vec_write_element##TBITS(v1, i, a * b); \
|
|
} \
|
|
}
|
|
DEF_VMLO(8, 16)
|
|
DEF_VMLO(16, 32)
|
|
DEF_VMLO(32, 64)
|
|
|
|
#define DEF_VPOPCT(BITS) \
|
|
void HELPER(gvec_vpopct##BITS)(void *v1, const void *v2, uint32_t desc) \
|
|
{ \
|
|
int i; \
|
|
\
|
|
for (i = 0; i < (128 / BITS); i++) { \
|
|
const uint##BITS##_t a = s390_vec_read_element##BITS(v2, i); \
|
|
\
|
|
s390_vec_write_element##BITS(v1, i, ctpop32(a)); \
|
|
} \
|
|
}
|
|
DEF_VPOPCT(8)
|
|
DEF_VPOPCT(16)
|
|
|
|
#define DEF_VERLLV(BITS) \
|
|
void HELPER(gvec_verllv##BITS)(void *v1, const void *v2, const void *v3, \
|
|
uint32_t desc) \
|
|
{ \
|
|
int i; \
|
|
\
|
|
for (i = 0; i < (128 / BITS); i++) { \
|
|
const uint##BITS##_t a = s390_vec_read_element##BITS(v2, i); \
|
|
const uint##BITS##_t b = s390_vec_read_element##BITS(v3, i); \
|
|
\
|
|
s390_vec_write_element##BITS(v1, i, rol##BITS(a, b)); \
|
|
} \
|
|
}
|
|
DEF_VERLLV(8)
|
|
DEF_VERLLV(16)
|
|
|
|
#define DEF_VERLL(BITS) \
|
|
void HELPER(gvec_verll##BITS)(void *v1, const void *v2, uint64_t count, \
|
|
uint32_t desc) \
|
|
{ \
|
|
int i; \
|
|
\
|
|
for (i = 0; i < (128 / BITS); i++) { \
|
|
const uint##BITS##_t a = s390_vec_read_element##BITS(v2, i); \
|
|
\
|
|
s390_vec_write_element##BITS(v1, i, rol##BITS(a, count)); \
|
|
} \
|
|
}
|
|
DEF_VERLL(8)
|
|
DEF_VERLL(16)
|
|
|
|
#define DEF_VERIM(BITS) \
|
|
void HELPER(gvec_verim##BITS)(void *v1, const void *v2, const void *v3, \
|
|
uint32_t desc) \
|
|
{ \
|
|
const uint8_t count = simd_data(desc); \
|
|
int i; \
|
|
\
|
|
for (i = 0; i < (128 / BITS); i++) { \
|
|
const uint##BITS##_t a = s390_vec_read_element##BITS(v1, i); \
|
|
const uint##BITS##_t b = s390_vec_read_element##BITS(v2, i); \
|
|
const uint##BITS##_t mask = s390_vec_read_element##BITS(v3, i); \
|
|
const uint##BITS##_t d = (a & ~mask) | (rol##BITS(b, count) & mask); \
|
|
\
|
|
s390_vec_write_element##BITS(v1, i, d); \
|
|
} \
|
|
}
|
|
DEF_VERIM(8)
|
|
DEF_VERIM(16)
|
|
|
|
void HELPER(gvec_vsl)(void *v1, const void *v2, uint64_t count,
|
|
uint32_t desc)
|
|
{
|
|
s390_vec_shl(v1, v2, count);
|
|
}
|
|
|
|
void HELPER(gvec_vsra)(void *v1, const void *v2, uint64_t count,
|
|
uint32_t desc)
|
|
{
|
|
s390_vec_sar(v1, v2, count);
|
|
}
|
|
|
|
void HELPER(gvec_vsrl)(void *v1, const void *v2, uint64_t count,
|
|
uint32_t desc)
|
|
{
|
|
s390_vec_shr(v1, v2, count);
|
|
}
|
|
|
|
#define DEF_VSCBI(BITS) \
|
|
void HELPER(gvec_vscbi##BITS)(void *v1, const void *v2, const void *v3, \
|
|
uint32_t desc) \
|
|
{ \
|
|
int i; \
|
|
\
|
|
for (i = 0; i < (128 / BITS); i++) { \
|
|
const uint##BITS##_t a = s390_vec_read_element##BITS(v2, i); \
|
|
const uint##BITS##_t b = s390_vec_read_element##BITS(v3, i); \
|
|
\
|
|
s390_vec_write_element##BITS(v1, i, a < b); \
|
|
} \
|
|
}
|
|
DEF_VSCBI(8)
|
|
DEF_VSCBI(16)
|
|
|
|
void HELPER(gvec_vtm)(void *v1, const void *v2, CPUS390XState *env,
|
|
uint32_t desc)
|
|
{
|
|
S390Vector tmp;
|
|
|
|
s390_vec_and(&tmp, v1, v2);
|
|
if (s390_vec_is_zero(&tmp)) {
|
|
/* Selected bits all zeros; or all mask bits zero */
|
|
env->cc_op = 0;
|
|
} else if (s390_vec_equal(&tmp, v2)) {
|
|
/* Selected bits all ones */
|
|
env->cc_op = 3;
|
|
} else {
|
|
/* Selected bits a mix of zeros and ones */
|
|
env->cc_op = 1;
|
|
}
|
|
}
|