mirror of https://gitee.com/openkylin/qemu.git
86 lines
2.7 KiB
C
86 lines
2.7 KiB
C
|
/*
|
||
|
|
* TCG Backend Data: constant pool.
|
||
|
|
*
|
||
|
|
* Permission is hereby granted, free of charge, to any person obtaining a copy
|
||
|
|
* of this software and associated documentation files (the "Software"), to deal
|
||
|
|
* in the Software without restriction, including without limitation the rights
|
||
|
|
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
|
||
|
|
* copies of the Software, and to permit persons to whom the Software is
|
||
|
|
* furnished to do so, subject to the following conditions:
|
||
|
|
*
|
||
|
|
* The above copyright notice and this permission notice shall be included in
|
||
|
|
* all copies or substantial portions of the Software.
|
||
|
|
*
|
||
|
|
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
|
||
|
|
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
|
||
|
|
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
|
||
|
|
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
|
||
|
|
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
|
||
|
|
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
|
||
|
|
* THE SOFTWARE.
|
||
|
|
*/
|
||
|
|
|
||
|
|
typedef struct TCGLabelPoolData {
|
||
|
|
struct TCGLabelPoolData *next;
|
||
|
|
tcg_target_ulong data;
|
||
|
|
tcg_insn_unit *label;
|
||
|
|
intptr_t addend;
|
||
|
|
int type;
|
||
|
|
} TCGLabelPoolData;
|
||
|
|
|
||
|
|
|
||
|
|
static void new_pool_label(TCGContext *s, tcg_target_ulong data, int type,
|
||
|
|
tcg_insn_unit *label, intptr_t addend)
|
||
|
|
{
|
||
|
|
TCGLabelPoolData *n = tcg_malloc(sizeof(*n));
|
||
|
|
TCGLabelPoolData *i, **pp;
|
||
|
|
|
||
|
|
n->data = data;
|
||
|
|
n->label = label;
|
||
|
|
n->type = type;
|
||
|
|
n->addend = addend;
|
||
|
|
|
||
|
|
/* Insertion sort on the pool. */
|
||
|
|
for (pp = &s->pool_labels; (i = *pp) && i->data < data; pp = &i->next) {
|
||
|
|
continue;
|
||
|
|
}
|
||
|
|
n->next = *pp;
|
||
|
|
*pp = 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;
|
||
|
|
|
||
|
|
if (p == NULL) {
|
||
|
|
return true;
|
||
|
|
}
|
||
|
|
|
||
|
|
/* ??? 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));
|
||
|
|
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)) {
|
||
|
|
return false;
|
||
|
|
}
|
||
|
|
*a++ = d;
|
||
|
|
}
|
||
|
|
patch_reloc(p->label, p->type, (intptr_t)(a - 1), p->addend);
|
||
|
|
}
|
||
|
|
|
||
|
|
s->code_ptr = (void *)a;
|
||
|
|
return true;
|
||
|
|
}
|