Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
---
tcg/sparc/tcg-target-con-str.h | 23 ++++++++++
tcg/sparc/tcg-target.h | 5 +--
tcg/sparc/tcg-target.c.inc | 81 +++++++++++++---------------------
3 files changed, 55 insertions(+), 54 deletions(-)
create mode 100644 tcg/sparc/tcg-target-con-str.h
diff --git a/tcg/sparc/tcg-target-con-str.h b/tcg/sparc/tcg-target-con-str.h
new file mode 100644
index 0000000000..fdb25d9313
--- /dev/null
+++ b/tcg/sparc/tcg-target-con-str.h
@@ -0,0 +1,23 @@
+/* SPDX-License-Identifier: MIT */
+/*
+ * Define Sparc target-specific operand constraints.
+ * Copyright (c) 2021 Linaro
+ */
+
+/*
+ * Define constraint letters for register sets:
+ * REGS(letter, register_mask)
+ */
+REGS('r', ALL_GENERAL_REGS)
+REGS('R', ALL_GENERAL_REGS64)
+REGS('s', ALL_QLDST_REGS)
+REGS('S', ALL_QLDST_REGS64)
+REGS('A', TARGET_LONG_BITS == 64 ? ALL_QLDST_REGS64 : ALL_QLDST_REGS)
+
+/*
+ * Define constraint letters for constants:
+ * CONST(letter, TCG_CT_CONST_* bit set)
+ */
+CONST('I', TCG_CT_CONST_S11)
+CONST('J', TCG_CT_CONST_S13)
+CONST('Z', TCG_CT_CONST_ZERO)
diff --git a/tcg/sparc/tcg-target.h b/tcg/sparc/tcg-target.h
index 95ab9af955..5185b00524 100644
--- a/tcg/sparc/tcg-target.h
+++ b/tcg/sparc/tcg-target.h
@@ -66,10 +66,6 @@ typedef enum {
TCG_REG_I7,
} TCGReg;
-#define TCG_CT_CONST_S11 0x100
-#define TCG_CT_CONST_S13 0x200
-#define TCG_CT_CONST_ZERO 0x400
-
/* used for function call generation */
#define TCG_REG_CALL_STACK TCG_REG_O6
@@ -172,5 +168,6 @@ extern bool use_vis3_instructions;
void tb_target_set_jmp_target(uintptr_t, uintptr_t, uintptr_t, uintptr_t);
#define TCG_TARGET_NEED_POOL_LABELS
+#define TCG_TARGET_CON_STR_H
#endif
diff --git a/tcg/sparc/tcg-target.c.inc b/tcg/sparc/tcg-target.c.inc
index 28b5b6559a..e291eb0b95 100644
--- a/tcg/sparc/tcg-target.c.inc
+++ b/tcg/sparc/tcg-target.c.inc
@@ -67,18 +67,38 @@ static const char * const tcg_target_reg_names[TCG_TARGET_NB_REGS] = {
# define SPARC64 0
#endif
-/* Note that sparcv8plus can only hold 64 bit quantities in %g and %o
- registers. These are saved manually by the kernel in full 64-bit
- slots. The %i and %l registers are saved by the register window
- mechanism, which only allocates space for 32 bits. Given that this
- window spill/fill can happen on any signal, we must consider the
- high bits of the %i and %l registers garbage at all times. */
-#if SPARC64
-# define ALL_64 0xffffffffu
+#define TCG_CT_CONST_S11 0x100
+#define TCG_CT_CONST_S13 0x200
+#define TCG_CT_CONST_ZERO 0x400
+
+/*
+ * For softmmu, we need to avoid conflicts with the first 3
+ * argument registers to perform the tlb lookup, and to call
+ * the helper function.
+ */
+#ifdef CONFIG_SOFTMMU
+#define SOFTMMU_RESERVE_REGS MAKE_64BIT_MASK(TCG_REG_O0, 3)
#else
-# define ALL_64 0xffffu
+#define SOFTMMU_RESERVE_REGS 0
#endif
+/*
+ * Note that sparcv8plus can only hold 64 bit quantities in %g and %o
+ * registers. These are saved manually by the kernel in full 64-bit
+ * slots. The %i and %l registers are saved by the register window
+ * mechanism, which only allocates space for 32 bits. Given that this
+ * window spill/fill can happen on any signal, we must consider the
+ * high bits of the %i and %l registers garbage at all times.
+ */
+#define ALL_GENERAL_REGS MAKE_64BIT_MASK(0, 32)
+#if SPARC64
+# define ALL_GENERAL_REGS64 ALL_GENERAL_REGS
+#else
+# define ALL_GENERAL_REGS64 MAKE_64BIT_MASK(0, 16)
+#endif
+#define ALL_QLDST_REGS (ALL_GENERAL_REGS & ~SOFTMMU_RESERVE_REGS)
+#define ALL_QLDST_REGS64 (ALL_GENERAL_REGS64 & ~SOFTMMU_RESERVE_REGS)
+
/* Define some temporary registers. T2 is used for constant generation. */
#define TCG_REG_T1 TCG_REG_G1
#define TCG_REG_T2 TCG_REG_O7
@@ -320,45 +340,6 @@ static bool patch_reloc(tcg_insn_unit *src_rw, int type,
return true;
}
-/* parse target specific constraints */
-static const char *target_parse_constraint(TCGArgConstraint *ct,
- const char *ct_str, TCGType type)
-{
- switch (*ct_str++) {
- case 'r':
- ct->regs = 0xffffffff;
- break;
- case 'R':
- ct->regs = ALL_64;
- break;
- case 'A': /* qemu_ld/st address constraint */
- ct->regs = TARGET_LONG_BITS == 64 ? ALL_64 : 0xffffffff;
- reserve_helpers:
- tcg_regset_reset_reg(ct->regs, TCG_REG_O0);
- tcg_regset_reset_reg(ct->regs, TCG_REG_O1);
- tcg_regset_reset_reg(ct->regs, TCG_REG_O2);
- break;
- case 's': /* qemu_st data 32-bit constraint */
- ct->regs = 0xffffffff;
- goto reserve_helpers;
- case 'S': /* qemu_st data 64-bit constraint */
- ct->regs = ALL_64;
- goto reserve_helpers;
- case 'I':
- ct->ct |= TCG_CT_CONST_S11;
- break;
- case 'J':
- ct->ct |= TCG_CT_CONST_S13;
- break;
- case 'Z':
- ct->ct |= TCG_CT_CONST_ZERO;
- break;
- default:
- return NULL;
- }
- return ct_str;
-}
-
/* test if a constant matches the constraint */
static inline int tcg_target_const_match(tcg_target_long val, TCGType type,
const TCGArgConstraint *arg_ct)
@@ -1746,8 +1727,8 @@ static void tcg_target_init(TCGContext *s)
}
#endif
- tcg_target_available_regs[TCG_TYPE_I32] = 0xffffffff;
- tcg_target_available_regs[TCG_TYPE_I64] = ALL_64;
+ tcg_target_available_regs[TCG_TYPE_I32] = ALL_GENERAL_REGS;
+ tcg_target_available_regs[TCG_TYPE_I64] = ALL_GENERAL_REGS64;
tcg_target_call_clobber_regs = 0;
tcg_regset_set_reg(tcg_target_call_clobber_regs, TCG_REG_G1);
--
2.25.1