mirror of
https://gitlab.com/qemu-project/qemu
synced 2024-09-06 18:05:37 +00:00
![Richard Henderson](/assets/img/avatar_default.png)
Add two helper functions, using a global variable to hold the displacement. The displacement is currently always 0, so no change in behaviour. Begin using the functions in tcg common code only. Reviewed-by: Joelle van Dyne <j@getutm.app> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
163 lines
5.3 KiB
C++
163 lines
5.3 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_insn_unit *label;
|
|
intptr_t addend;
|
|
int rtype;
|
|
unsigned nlong;
|
|
tcg_target_ulong data[];
|
|
} TCGLabelPoolData;
|
|
|
|
|
|
static TCGLabelPoolData *new_pool_alloc(TCGContext *s, int nlong, int rtype,
|
|
tcg_insn_unit *label, intptr_t addend)
|
|
{
|
|
TCGLabelPoolData *n = tcg_malloc(sizeof(TCGLabelPoolData)
|
|
+ sizeof(tcg_target_ulong) * nlong);
|
|
|
|
n->label = label;
|
|
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) != 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.c.inc. */
|
|
static void tcg_out_nop_fill(tcg_insn_unit *p, int count);
|
|
|
|
static int tcg_out_pool_finalize(TCGContext *s)
|
|
{
|
|
TCGLabelPoolData *p = s->pool_labels;
|
|
TCGLabelPoolData *l = NULL;
|
|
void *a;
|
|
|
|
if (p == NULL) {
|
|
return 0;
|
|
}
|
|
|
|
/* ??? 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) * p->nlong);
|
|
tcg_out_nop_fill(s->code_ptr, (tcg_insn_unit *)a - s->code_ptr);
|
|
s->data_gen_ptr = a;
|
|
|
|
for (; p != NULL; p = p->next) {
|
|
size_t size = sizeof(tcg_target_ulong) * p->nlong;
|
|
uintptr_t value;
|
|
|
|
if (!l || l->nlong != p->nlong || memcmp(l->data, p->data, size)) {
|
|
if (unlikely(a > s->code_gen_highwater)) {
|
|
return -1;
|
|
}
|
|
memcpy(a, p->data, size);
|
|
a += size;
|
|
l = p;
|
|
}
|
|
|
|
value = (uintptr_t)tcg_splitwx_to_rx(a) - size;
|
|
if (!patch_reloc(p->label, p->rtype, value, p->addend)) {
|
|
return -2;
|
|
}
|
|
}
|
|
|
|
s->code_ptr = a;
|
|
return 0;
|
|
}
|