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tcg: Allow multiple word entries into the constant pool 

This will be required for storing vector constants.

Reviewed-by: Alex Bennée <alex.bennee@linaro.org>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
This commit is contained in:
Richard Henderson 2017-11-09 20:24:08 +01:00
parent b256b89c63
commit da73a4abca
1 changed files with 92 additions and 21 deletions
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113
tcg/tcg-pool.inc.c
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@ -22,39 +22,110 @@
typedef struct TCGLabelPoolData {
struct TCGLabelPoolData *next;
tcg_target_ulong data;
tcg_insn_unit *label;
intptr_t addend;
int type;
int rtype;
unsigned nlong;
tcg_target_ulong data[];
} TCGLabelPoolData;
static void new_pool_label(TCGContext *s, tcg_target_ulong data, int type,
tcg_insn_unit *label, intptr_t addend)
static TCGLabelPoolData *new_pool_alloc(TCGContext *s, int nlong, int rtype,
tcg_insn_unit *label, intptr_t addend)
{
TCGLabelPoolData *n = tcg_malloc(sizeof(*n));
TCGLabelPoolData *i, **pp;
TCGLabelPoolData *n = tcg_malloc(sizeof(TCGLabelPoolData)
+ sizeof(tcg_target_ulong) * nlong);
n->data = data;
n->label = label;
n->type = type;
n->addend = addend;
n->rtype = rtype;
n->nlong = nlong;
return n;
}
static void new_pool_insert(TCGContext *s, TCGLabelPoolData *n)
{
TCGLabelPoolData *i, **pp;
int nlong = n->nlong;
/* Insertion sort on the pool. */
for (pp = &s->pool_labels; (i = *pp) && i->data < data; pp = &i->next) {
continue;
for (pp = &s->pool_labels; (i = *pp) != NULL; pp = &i->next) {
if (nlong > i->nlong) {
break;
}
if (nlong < i->nlong) {
continue;
}
if (memcmp(n->data, i->data, sizeof(tcg_target_ulong) * nlong) >= 0) {
break;
}
}
n->next = *pp;
*pp = n;
}
/* The "usual" for generic integer code. */
static inline void new_pool_label(TCGContext *s, tcg_target_ulong d, int rtype,
tcg_insn_unit *label, intptr_t addend)
{
TCGLabelPoolData *n = new_pool_alloc(s, 1, rtype, label, addend);
n->data[0] = d;
new_pool_insert(s, n);
}
/* For v64 or v128, depending on the host. */
static inline void new_pool_l2(TCGContext *s, int rtype, tcg_insn_unit *label,
intptr_t addend, tcg_target_ulong d0,
tcg_target_ulong d1)
{
TCGLabelPoolData *n = new_pool_alloc(s, 2, rtype, label, addend);
n->data[0] = d0;
n->data[1] = d1;
new_pool_insert(s, n);
}
/* For v128 or v256, depending on the host. */
static inline void new_pool_l4(TCGContext *s, int rtype, tcg_insn_unit *label,
intptr_t addend, tcg_target_ulong d0,
tcg_target_ulong d1, tcg_target_ulong d2,
tcg_target_ulong d3)
{
TCGLabelPoolData *n = new_pool_alloc(s, 4, rtype, label, addend);
n->data[0] = d0;
n->data[1] = d1;
n->data[2] = d2;
n->data[3] = d3;
new_pool_insert(s, n);
}
/* For v256, for 32-bit host. */
static inline void new_pool_l8(TCGContext *s, int rtype, tcg_insn_unit *label,
intptr_t addend, tcg_target_ulong d0,
tcg_target_ulong d1, tcg_target_ulong d2,
tcg_target_ulong d3, tcg_target_ulong d4,
tcg_target_ulong d5, tcg_target_ulong d6,
tcg_target_ulong d7)
{
TCGLabelPoolData *n = new_pool_alloc(s, 8, rtype, label, addend);
n->data[0] = d0;
n->data[1] = d1;
n->data[2] = d2;
n->data[3] = d3;
n->data[4] = d4;
n->data[5] = d5;
n->data[6] = d6;
n->data[7] = d7;
new_pool_insert(s, n);
}
/* To be provided by cpu/tcg-target.inc.c. */
static void tcg_out_nop_fill(tcg_insn_unit *p, int count);
static bool tcg_out_pool_finalize(TCGContext *s)
{
TCGLabelPoolData *p = s->pool_labels;
tcg_target_ulong d, *a;
TCGLabelPoolData *l = NULL;
void *a;
if (p == NULL) {
return true;
@ -62,24 +133,24 @@ static bool tcg_out_pool_finalize(TCGContext *s)
/* ??? Round up to qemu_icache_linesize, but then do not round
again when allocating the next TranslationBlock structure. */
a = (void *)ROUND_UP((uintptr_t)s->code_ptr, sizeof(tcg_target_ulong));
a = (void *)ROUND_UP((uintptr_t)s->code_ptr,
sizeof(tcg_target_ulong) * p->nlong);
tcg_out_nop_fill(s->code_ptr, (tcg_insn_unit *)a - s->code_ptr);
s->data_gen_ptr = a;
/* Ensure the first comparison fails. */
d = p->data + 1;
for (; p != NULL; p = p->next) {
if (p->data != d) {
d = p->data;
if (unlikely((void *)a > s->code_gen_highwater)) {
size_t size = sizeof(tcg_target_ulong) * p->nlong;
if (!l || l->nlong != p->nlong || memcmp(l->data, p->data, size)) {
if (unlikely(a > s->code_gen_highwater)) {
return false;
}
*a++ = d;
memcpy(a, p->data, size);
a += size;
l = p;
}
patch_reloc(p->label, p->type, (intptr_t)(a - 1), p->addend);
patch_reloc(p->label, p->rtype, (intptr_t)a - size, p->addend);
}
s->code_ptr = (void *)a;
s->code_ptr = a;
return true;
}