Reviewed-by: Peter Maydell <peter.mayd...@linaro.org>
Signed-off-by: Richard Henderson <richard.hender...@linaro.org>
---
tcg/ppc/tcg-target.h | 2 -
tcg/ppc/tcg-target.c.inc | 98 ++++++++++++++++++++++++++++++++++++----
2 files changed, 90 insertions(+), 10 deletions(-)
diff --git a/tcg/ppc/tcg-target.h b/tcg/ppc/tcg-target.h
index 0943192cde..c775c97b61 100644
--- a/tcg/ppc/tcg-target.h
+++ b/tcg/ppc/tcg-target.h
@@ -182,9 +182,7 @@ void tb_target_set_jmp_target(uintptr_t, uintptr_t,
uintptr_t, uintptr_t);
#define TCG_TARGET_DEFAULT_MO (0)
#define TCG_TARGET_HAS_MEMORY_BSWAP 1
-#ifdef CONFIG_SOFTMMU
#define TCG_TARGET_NEED_LDST_LABELS
-#endif
#define TCG_TARGET_NEED_POOL_LABELS
#endif
diff --git a/tcg/ppc/tcg-target.c.inc b/tcg/ppc/tcg-target.c.inc
index 9e79a7edee..dea24f23c4 100644
--- a/tcg/ppc/tcg-target.c.inc
+++ b/tcg/ppc/tcg-target.c.inc
@@ -24,6 +24,7 @@
#include "elf.h"
#include "../tcg-pool.c.inc"
+#include "../tcg-ldst.c.inc"
/*
* Standardize on the _CALL_FOO symbols used by GCC:
@@ -1881,7 +1882,8 @@ void tb_target_set_jmp_target(uintptr_t tc_ptr, uintptr_t
jmp_rx,
}
}
-static void tcg_out_call(TCGContext *s, const tcg_insn_unit *target)
+static void tcg_out_call_int(TCGContext *s, int lk,
+ const tcg_insn_unit *target)
{
#ifdef _CALL_AIX
/* Look through the descriptor. If the branch is in range, and we
@@ -1892,7 +1894,7 @@ static void tcg_out_call(TCGContext *s, const
tcg_insn_unit *target)
if (in_range_b(diff) && toc == (uint32_t)toc) {
tcg_out_movi(s, TCG_TYPE_PTR, TCG_REG_TMP1, toc);
- tcg_out_b(s, LK, tgt);
+ tcg_out_b(s, lk, tgt);
} else {
/* Fold the low bits of the constant into the addresses below. */
intptr_t arg = (intptr_t)target;
@@ -1907,7 +1909,7 @@ static void tcg_out_call(TCGContext *s, const
tcg_insn_unit *target)
tcg_out_ld(s, TCG_TYPE_PTR, TCG_REG_R0, TCG_REG_TMP1, ofs);
tcg_out32(s, MTSPR | RA(TCG_REG_R0) | CTR);
tcg_out_ld(s, TCG_TYPE_PTR, TCG_REG_R2, TCG_REG_TMP1, ofs + SZP);
- tcg_out32(s, BCCTR | BO_ALWAYS | LK);
+ tcg_out32(s, BCCTR | BO_ALWAYS | lk);
}
#elif defined(_CALL_ELF) && _CALL_ELF == 2
intptr_t diff;
@@ -1921,16 +1923,21 @@ static void tcg_out_call(TCGContext *s, const
tcg_insn_unit *target)
diff = tcg_pcrel_diff(s, target);
if (in_range_b(diff)) {
- tcg_out_b(s, LK, target);
+ tcg_out_b(s, lk, target);
} else {
tcg_out32(s, MTSPR | RS(TCG_REG_R12) | CTR);
- tcg_out32(s, BCCTR | BO_ALWAYS | LK);
+ tcg_out32(s, BCCTR | BO_ALWAYS | lk);
}
#else
- tcg_out_b(s, LK, target);
+ tcg_out_b(s, lk, target);
#endif
}
+static void tcg_out_call(TCGContext *s, const tcg_insn_unit *target)
+{
+ tcg_out_call_int(s, LK, target);
+}
+
static const uint32_t qemu_ldx_opc[(MO_SSIZE + MO_BSWAP) + 1] = {
[MO_UB] = LBZX,
[MO_UW] = LHZX,
@@ -1960,8 +1967,6 @@ static const uint32_t qemu_exts_opc[4] = {
};
#if defined (CONFIG_SOFTMMU)
-#include "../tcg-ldst.c.inc"
-
/* helper signature: helper_ld_mmu(CPUState *env, target_ulong addr,
* int mmu_idx, uintptr_t ra)
*/
@@ -2227,6 +2232,71 @@ static bool tcg_out_qemu_st_slow_path(TCGContext *s,
TCGLabelQemuLdst *lb)
tcg_out_b(s, 0, lb->raddr);
return true;
}
+#else
+
+static void tcg_out_test_alignment(TCGContext *s, bool is_ld, TCGReg addrlo,
+ TCGReg addrhi, unsigned a_bits)
+{
+ unsigned a_mask = (1 << a_bits) - 1;
+ TCGLabelQemuLdst *label = new_ldst_label(s);
+
+ label->is_ld = is_ld;
+ label->addrlo_reg = addrlo;
+ label->addrhi_reg = addrhi;
+
+ /* We are expecting a_bits to max out at 7, much lower than ANDI. */
+ tcg_debug_assert(a_bits < 16);
+ tcg_out32(s, ANDI | SAI(addrlo, TCG_REG_R0, a_mask));
+
+ label->label_ptr[0] = s->code_ptr;
+ tcg_out32(s, BC | BI(0, CR_EQ) | BO_COND_FALSE | LK);
+
+ label->raddr = tcg_splitwx_to_rx(s->code_ptr);
+}
+
+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;
+#ifdef TCG_TARGET_CALL_ALIGN_ARGS
+ arg |= 1;
+#endif
+ 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 */
static void tcg_out_qemu_ld(TCGContext *s, const TCGArg *args, bool is_64)
@@ -2238,6 +2308,8 @@ static void tcg_out_qemu_ld(TCGContext *s, const TCGArg
*args, bool is_64)
#ifdef CONFIG_SOFTMMU
int mem_index;
tcg_insn_unit *label_ptr;
+#else
+ unsigned a_bits;
#endif
datalo = *args++;
@@ -2258,6 +2330,10 @@ static void tcg_out_qemu_ld(TCGContext *s, const TCGArg
*args, bool is_64)
rbase = TCG_REG_R3;
#else /* !CONFIG_SOFTMMU */
+ a_bits = get_alignment_bits(opc);
+ if (a_bits) {
+ tcg_out_test_alignment(s, true, addrlo, addrhi, a_bits);
+ }
rbase = guest_base ? TCG_GUEST_BASE_REG : 0;
if (TCG_TARGET_REG_BITS > TARGET_LONG_BITS) {
tcg_out_ext32u(s, TCG_REG_TMP1, addrlo);
@@ -2313,6 +2389,8 @@ static void tcg_out_qemu_st(TCGContext *s, const TCGArg
*args, bool is_64)
#ifdef CONFIG_SOFTMMU
int mem_index;
tcg_insn_unit *label_ptr;
+#else
+ unsigned a_bits;
#endif
datalo = *args++;
@@ -2333,6 +2411,10 @@ static void tcg_out_qemu_st(TCGContext *s, const TCGArg
*args, bool is_64)
rbase = TCG_REG_R3;
#else /* !CONFIG_SOFTMMU */
+ a_bits = get_alignment_bits(opc);
+ if (a_bits) {
+ tcg_out_test_alignment(s, false, addrlo, addrhi, a_bits);
+ }
rbase = guest_base ? TCG_GUEST_BASE_REG : 0;
if (TCG_TARGET_REG_BITS > TARGET_LONG_BITS) {
tcg_out_ext32u(s, TCG_REG_TMP1, addrlo);
--
2.25.1
