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tcg/loongarch64: Use full load/store helpers in user-only mode 

Instead of using helper_unaligned_{ld,st}, use the full load/store helpers.
This will allow the fast path to increase alignment to implement atomicity
while not immediately raising an alignment exception.

Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
This commit is contained in:
Richard Henderson 2023-04-02 22:05:39 +00:00
parent 64d51dc31a
commit 3fb4934d34
1 changed files with 0 additions and 30 deletions
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30
tcg/loongarch64/tcg-target.c.inc
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@ -783,7 +783,6 @@ static bool tcg_out_sti(TCGContext *s, TCGType type, TCGArg val,
* Load/store helpers for SoftMMU, and qemu_ld/st implementations * Load/store helpers for SoftMMU, and qemu_ld/st implementations
*/ */
#if defined(CONFIG_SOFTMMU)
static bool tcg_out_goto(TCGContext *s, const tcg_insn_unit *target) static bool tcg_out_goto(TCGContext *s, const tcg_insn_unit *target)
{ {
tcg_out_opc_b(s, 0); tcg_out_opc_b(s, 0);
@ -822,35 +821,6 @@ static bool tcg_out_qemu_st_slow_path(TCGContext *s, TCGLabelQemuLdst *l)
tcg_out_call_int(s, qemu_st_helpers[opc & MO_SIZE], false); tcg_out_call_int(s, qemu_st_helpers[opc & MO_SIZE], false);
return tcg_out_goto(s, l->raddr); return tcg_out_goto(s, l->raddr);
} }
#else
static bool tcg_out_fail_alignment(TCGContext *s, TCGLabelQemuLdst *l)
{
/* resolve label address */
if (!reloc_br_sk16(l->label_ptr[0], tcg_splitwx_to_rx(s->code_ptr))) {
return false;
}
tcg_out_mov(s, TCG_TYPE_TL, TCG_REG_A1, l->addrlo_reg);
tcg_out_mov(s, TCG_TYPE_PTR, TCG_REG_A0, TCG_AREG0);
/* tail call, with the return address back inline. */
tcg_out_movi(s, TCG_TYPE_PTR, TCG_REG_RA, (uintptr_t)l->raddr);
tcg_out_call_int(s, (const void *)(l->is_ld ? helper_unaligned_ld
: helper_unaligned_st), true);
return true;
}
static bool tcg_out_qemu_ld_slow_path(TCGContext *s, TCGLabelQemuLdst *l)
{
return tcg_out_fail_alignment(s, l);
}
static bool tcg_out_qemu_st_slow_path(TCGContext *s, TCGLabelQemuLdst *l)
{
return tcg_out_fail_alignment(s, l);
}
#endif /* CONFIG_SOFTMMU */
typedef struct { typedef struct {
TCGReg base; TCGReg base;