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/*
* TCG Backend Data: load-store optimization only.
*
* 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.
*/
#ifdef CONFIG_SOFTMMU
typedef struct TCGLabelQemuLdst {
bool is_ld; /* qemu_ld: true, qemu_st: false */
TCGMemOpIdx oi;
TCGType type; /* result type of a load */
TCGReg addrlo_reg; /* reg index for low word of guest virtual addr */
TCGReg addrhi_reg; /* reg index for high word of guest virtual addr */
TCGReg datalo_reg; /* reg index for low word to be loaded or stored */
TCGReg datahi_reg; /* reg index for high word to be loaded or stored */
tcg_insn_unit *raddr; /* gen code addr of the next IR of qemu_ld/st IR */
tcg_insn_unit *label_ptr[2]; /* label pointers to be updated */
struct TCGLabelQemuLdst *next;
} TCGLabelQemuLdst;
typedef struct TCGBackendData {
TCGLabelQemuLdst *labels;
} TCGBackendData;
/*
* Initialize TB backend data at the beginning of the TB.
*/
static inline void tcg_out_tb_init(TCGContext *s)
{
s->be->labels = NULL;
}
/*
* Generate TB finalization at the end of block
*/
static void tcg_out_qemu_ld_slow_path(TCGContext *s, TCGLabelQemuLdst *l);
static void tcg_out_qemu_st_slow_path(TCGContext *s, TCGLabelQemuLdst *l);
static void tcg_out_tb_finalize(TCGContext *s)
{
TCGLabelQemuLdst *lb;
/* qemu_ld/st slow paths */
for (lb = s->be->labels; lb != NULL; lb = lb->next) {
if (lb->is_ld) {
tcg_out_qemu_ld_slow_path(s, lb);
} else {
tcg_out_qemu_st_slow_path(s, lb);
}
}
}
/*
* Allocate a new TCGLabelQemuLdst entry.
*/
static inline TCGLabelQemuLdst *new_ldst_label(TCGContext *s)
{
TCGBackendData *be = s->be;
TCGLabelQemuLdst *l = tcg_malloc(sizeof(*l));
l->next = be->labels;
be->labels = l;
return l;
}
#else
#include "tcg-be-null.h"
#endif /* CONFIG_SOFTMMU */
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