Reviewed-by: Peter Maydell <peter.mayd...@linaro.org>
Signed-off-by: Richard Henderson <richard.hender...@linaro.org>
---
tcg/s390x/tcg-target.h | 2 --
tcg/s390x/tcg-target.c.inc | 59 ++++++++++++++++++++++++++++++++++++--
2 files changed, 57 insertions(+), 4 deletions(-)
diff --git a/tcg/s390x/tcg-target.h b/tcg/s390x/tcg-target.h
index 527ada0f63..69217d995b 100644
--- a/tcg/s390x/tcg-target.h
+++ b/tcg/s390x/tcg-target.h
@@ -178,9 +178,7 @@ static inline void tb_target_set_jmp_target(uintptr_t
tc_ptr, uintptr_t jmp_rx,
/* no need to flush icache explicitly */
}
-#ifdef CONFIG_SOFTMMU
#define TCG_TARGET_NEED_LDST_LABELS
-#endif
#define TCG_TARGET_NEED_POOL_LABELS
#endif
diff --git a/tcg/s390x/tcg-target.c.inc b/tcg/s390x/tcg-target.c.inc
index 8938c446c8..bc6a13d797 100644
--- a/tcg/s390x/tcg-target.c.inc
+++ b/tcg/s390x/tcg-target.c.inc
@@ -29,6 +29,7 @@
#error "unsupported code generation mode"
#endif
+#include "../tcg-ldst.c.inc"
#include "../tcg-pool.c.inc"
#include "elf.h"
@@ -136,6 +137,7 @@ typedef enum S390Opcode {
RI_OIHL = 0xa509,
RI_OILH = 0xa50a,
RI_OILL = 0xa50b,
+ RI_TMLL = 0xa701,
RIE_CGIJ = 0xec7c,
RIE_CGRJ = 0xec64,
@@ -1804,8 +1806,6 @@ static void tcg_out_qemu_st_direct(TCGContext *s, MemOp
opc, TCGReg data,
}
#if defined(CONFIG_SOFTMMU)
-#include "../tcg-ldst.c.inc"
-
/* We're expecting to use a 20-bit negative offset on the tlb memory ops. */
QEMU_BUILD_BUG_ON(TLB_MASK_TABLE_OFS(0) > 0);
QEMU_BUILD_BUG_ON(TLB_MASK_TABLE_OFS(0) < -(1 << 19));
@@ -1942,6 +1942,53 @@ static bool tcg_out_qemu_st_slow_path(TCGContext *s,
TCGLabelQemuLdst *lb)
return true;
}
#else
+static void tcg_out_test_alignment(TCGContext *s, bool is_ld,
+ TCGReg addrlo, unsigned a_bits)
+{
+ unsigned a_mask = (1 << a_bits) - 1;
+ TCGLabelQemuLdst *l = new_ldst_label(s);
+
+ l->is_ld = is_ld;
+ l->addrlo_reg = addrlo;
+
+ /* We are expecting a_bits to max out at 7, much lower than TMLL. */
+ tcg_debug_assert(a_bits < 16);
+ tcg_out_insn(s, RI, TMLL, addrlo, a_mask);
+
+ tcg_out16(s, RI_BRC | (7 << 4)); /* CC in {1,2,3} */
+ l->label_ptr[0] = s->code_ptr;
+ s->code_ptr += 1;
+
+ l->raddr = tcg_splitwx_to_rx(s->code_ptr);
+}
+
+static bool tcg_out_fail_alignment(TCGContext *s, TCGLabelQemuLdst *l)
+{
+ if (!patch_reloc(l->label_ptr[0], R_390_PC16DBL,
+ (intptr_t)tcg_splitwx_to_rx(s->code_ptr), 2)) {
+ return false;
+ }
+
+ tcg_out_mov(s, TCG_TYPE_TL, TCG_REG_R3, l->addrlo_reg);
+ tcg_out_mov(s, TCG_TYPE_PTR, TCG_REG_R2, TCG_AREG0);
+
+ /* "Tail call" to the helper, with the return address back inline. */
+ tcg_out_movi(s, TCG_TYPE_PTR, TCG_REG_R14, (uintptr_t)l->raddr);
+ tgen_gotoi(s, S390_CC_ALWAYS, (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);
+}
+
static void tcg_prepare_user_ldst(TCGContext *s, TCGReg *addr_reg,
TCGReg *index_reg, tcg_target_long *disp)
{
@@ -1980,7 +2027,11 @@ static void tcg_out_qemu_ld(TCGContext* s, TCGReg
data_reg, TCGReg addr_reg,
#else
TCGReg index_reg;
tcg_target_long disp;
+ unsigned a_bits = get_alignment_bits(opc);
+ if (a_bits) {
+ tcg_out_test_alignment(s, true, addr_reg, a_bits);
+ }
tcg_prepare_user_ldst(s, &addr_reg, &index_reg, &disp);
tcg_out_qemu_ld_direct(s, opc, data_reg, addr_reg, index_reg, disp);
#endif
@@ -2007,7 +2058,11 @@ static void tcg_out_qemu_st(TCGContext* s, TCGReg
data_reg, TCGReg addr_reg,
#else
TCGReg index_reg;
tcg_target_long disp;
+ unsigned a_bits = get_alignment_bits(opc);
+ if (a_bits) {
+ tcg_out_test_alignment(s, false, addr_reg, a_bits);
+ }
tcg_prepare_user_ldst(s, &addr_reg, &index_reg, &disp);
tcg_out_qemu_st_direct(s, opc, data_reg, addr_reg, index_reg, disp);
#endif
--
2.25.1
