motorhead/qemu
1
0
Fork 0
mirror of https://github.com/Motorhead1991/qemu.git synced 2025-08-09 10:34:58 -06:00
Code Issues Projects Releases Packages Wiki Activity Actions

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

Browse source 
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 2023-04-08 08:36:25 -07:00
parent e9266ecd8f
commit 64d51dc31a
1 changed files with 0 additions and 44 deletions
Download patch file Download diff file Expand all files Collapse all files

44
tcg/ppc/tcg-target.c.inc
View file

@ -1962,7 +1962,6 @@ static const uint32_t qemu_stx_opc[(MO_SIZE + MO_BSWAP) + 1] = {
[MO_BSWAP | MO_UQ] = STDBRX, [MO_BSWAP | MO_UQ] = STDBRX,
}; };
#if defined (CONFIG_SOFTMMU)
static TCGReg ldst_ra_gen(TCGContext *s, const TCGLabelQemuLdst *l, int arg) static TCGReg ldst_ra_gen(TCGContext *s, const TCGLabelQemuLdst *l, int arg)
{ {
if (arg < 0) { if (arg < 0) {
@ -2012,49 +2011,6 @@ static bool tcg_out_qemu_st_slow_path(TCGContext *s, TCGLabelQemuLdst *lb)
tcg_out_b(s, 0, lb->raddr); tcg_out_b(s, 0, lb->raddr);
return true; return true;
} }
#else
static bool tcg_out_fail_alignment(TCGContext *s, TCGLabelQemuLdst *l)
{
if (!reloc_pc14(l->label_ptr[0], tcg_splitwx_to_rx(s->code_ptr))) {
return false;
}
if (TCG_TARGET_REG_BITS < TARGET_LONG_BITS) {
TCGReg arg = TCG_REG_R4;
arg |= (TCG_TARGET_CALL_ARG_I64 == TCG_CALL_ARG_EVEN);
if (l->addrlo_reg != arg) {
tcg_out_mov(s, TCG_TYPE_I32, arg, l->addrhi_reg);
tcg_out_mov(s, TCG_TYPE_I32, arg + 1, l->addrlo_reg);
} else if (l->addrhi_reg != arg + 1) {
tcg_out_mov(s, TCG_TYPE_I32, arg + 1, l->addrlo_reg);
tcg_out_mov(s, TCG_TYPE_I32, arg, l->addrhi_reg);
} else {
tcg_out_mov(s, TCG_TYPE_I32, TCG_REG_R0, arg);
tcg_out_mov(s, TCG_TYPE_I32, arg, arg + 1);
tcg_out_mov(s, TCG_TYPE_I32, arg + 1, TCG_REG_R0);
}
} else {
tcg_out_mov(s, TCG_TYPE_TL, TCG_REG_R4, l->addrlo_reg);
}
tcg_out_mov(s, TCG_TYPE_TL, TCG_REG_R3, TCG_AREG0);
/* "Tail call" to the helper, with the return address back inline. */
tcg_out_call_int(s, 0, (const void *)(l->is_ld ? helper_unaligned_ld
: helper_unaligned_st));
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 /* SOFTMMU */
typedef struct { typedef struct {
TCGReg base; TCGReg base;