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Diffstat (limited to 'tcg/arm/tcg-target.c')
-rw-r--r--tcg/arm/tcg-target.c105
1 files changed, 44 insertions, 61 deletions
diff --git a/tcg/arm/tcg-target.c b/tcg/arm/tcg-target.c
index 6c8717ee32..e26dc727fb 100644
--- a/tcg/arm/tcg-target.c
+++ b/tcg/arm/tcg-target.c
@@ -90,8 +90,6 @@ static inline int tcg_target_get_call_iarg_regs_count(int flags)
return 4;
}
-#define USE_TLB
-
/* parse target specific constraints */
int target_parse_constraint(TCGArgConstraint *ct, const char **pct_str)
{
@@ -115,22 +113,8 @@ int target_parse_constraint(TCGArgConstraint *ct, const char **pct_str)
case 'x':
ct->ct |= TCG_CT_REG;
tcg_regset_set32(ct->u.regs, 0, (1 << TCG_TARGET_NB_REGS) - 1);
-# ifdef USE_TLB
tcg_regset_reset_reg(ct->u.regs, TCG_REG_R0);
tcg_regset_reset_reg(ct->u.regs, TCG_REG_R1);
-# endif
- break;
-
- /* qemu_ld/st data_reg */
- case 'd':
- ct->ct |= TCG_CT_REG;
- tcg_regset_set32(ct->u.regs, 0, (1 << TCG_TARGET_NB_REGS) - 1);
- /* r0 and optionally r1 will be overwritten by the address
- * so don't use these. */
- tcg_regset_reset_reg(ct->u.regs, TCG_REG_R0);
-# if TARGET_LONG_BITS == 64 || defined(USE_TLB)
- tcg_regset_reset_reg(ct->u.regs, TCG_REG_R1);
-# endif
break;
/* qemu_ld/st64 data_reg2 */
@@ -153,9 +137,7 @@ int target_parse_constraint(TCGArgConstraint *ct, const char **pct_str)
tcg_regset_set32(ct->u.regs, 0, (1 << TCG_TARGET_NB_REGS) - 1);
/* r0 will be overwritten by the low word of base, so don't use it. */
tcg_regset_reset_reg(ct->u.regs, TCG_REG_R0);
-# ifdef USE_TLB
tcg_regset_reset_reg(ct->u.regs, TCG_REG_R1);
-# endif
break;
# endif
#endif
@@ -210,6 +192,7 @@ enum arm_data_opc_e {
ARITH_ADC = 0x5,
ARITH_SBC = 0x6,
ARITH_RSC = 0x7,
+ ARITH_TST = 0x8,
ARITH_CMP = 0xa,
ARITH_CMN = 0xb,
ARITH_ORR = 0xc,
@@ -218,7 +201,8 @@ enum arm_data_opc_e {
ARITH_MVN = 0xf,
};
-#define TO_CPSR(opc) ((opc == ARITH_CMP || opc == ARITH_CMN) << 20)
+#define TO_CPSR(opc) \
+ ((opc == ARITH_CMP || opc == ARITH_CMN || opc == ARITH_TST) << 20)
#define SHIFT_IMM_LSL(im) (((im) << 7) | 0x00)
#define SHIFT_IMM_LSR(im) (((im) << 7) | 0x20)
@@ -309,7 +293,7 @@ static inline void tcg_out_dat_reg2(TCGContext *s,
static inline void tcg_out_dat_imm(TCGContext *s,
int cond, int opc, int rd, int rn, int im)
{
- tcg_out32(s, (cond << 28) | (1 << 25) | (opc << 21) |
+ tcg_out32(s, (cond << 28) | (1 << 25) | (opc << 21) | TO_CPSR(opc) |
(rn << 16) | (rd << 12) | im);
}
@@ -428,6 +412,21 @@ static inline void tcg_out_st32_r(TCGContext *s, int cond,
(rn << 16) | (rd << 12) | rm);
}
+/* Register pre-increment with base writeback. */
+static inline void tcg_out_ld32_rwb(TCGContext *s, int cond,
+ int rd, int rn, int rm)
+{
+ tcg_out32(s, (cond << 28) | 0x07b00000 |
+ (rn << 16) | (rd << 12) | rm);
+}
+
+static inline void tcg_out_st32_rwb(TCGContext *s, int cond,
+ int rd, int rn, int rm)
+{
+ tcg_out32(s, (cond << 28) | 0x07a00000 |
+ (rn << 16) | (rd << 12) | rm);
+}
+
static inline void tcg_out_ld16u_8(TCGContext *s, int cond,
int rd, int rn, tcg_target_long im)
{
@@ -826,6 +825,8 @@ static void *qemu_st_helpers[4] = {
};
#endif
+#define TLB_SHIFT (CPU_TLB_ENTRY_BITS + CPU_TLB_BITS)
+
static inline void tcg_out_qemu_ld(TCGContext *s, int cond,
const TCGArg *args, int opc)
{
@@ -835,9 +836,7 @@ static inline void tcg_out_qemu_ld(TCGContext *s, int cond,
# if TARGET_LONG_BITS == 64
int addr_reg2;
# endif
-# ifdef USE_TLB
uint32_t *label_ptr;
-# endif
#endif
data_reg = *args++;
@@ -853,17 +852,16 @@ static inline void tcg_out_qemu_ld(TCGContext *s, int cond,
mem_index = *args;
s_bits = opc & 3;
-# ifdef USE_TLB
/* Should generate something like the following:
- * ror r8, addr_reg, #TARGET_PAGE_BITS
+ * shr r8, addr_reg, #TARGET_PAGE_BITS
* and r0, r8, #(CPU_TLB_SIZE - 1) @ Assumption: CPU_TLB_BITS <= 8
- * add r0, T0, r0 lsl #CPU_TLB_ENTRY_BITS
+ * add r0, env, r0 lsl #CPU_TLB_ENTRY_BITS
*/
# if CPU_TLB_BITS > 8
# error
# endif
tcg_out_dat_reg(s, COND_AL, ARITH_MOV,
- 8, 0, addr_reg, SHIFT_IMM_ROR(TARGET_PAGE_BITS));
+ 8, 0, addr_reg, SHIFT_IMM_LSR(TARGET_PAGE_BITS));
tcg_out_dat_imm(s, COND_AL, ARITH_AND,
0, 8, CPU_TLB_SIZE - 1);
tcg_out_dat_reg(s, COND_AL, ARITH_ADD,
@@ -875,7 +873,6 @@ static inline void tcg_out_qemu_ld(TCGContext *s, int cond,
* add r0, r0, #(mem_index * sizeof *CPUState.tlb_table)
* before.
*/
-# define TLB_SHIFT (CPU_TLB_ENTRY_BITS + CPU_TLB_BITS)
if (mem_index)
tcg_out_dat_imm(s, COND_AL, ARITH_ADD, 0, 0,
(mem_index << (TLB_SHIFT & 1)) |
@@ -884,11 +881,10 @@ static inline void tcg_out_qemu_ld(TCGContext *s, int cond,
offsetof(CPUState, tlb_table[0][0].addr_read));
tcg_out_dat_reg(s, COND_AL, ARITH_CMP,
0, 1, 8, SHIFT_IMM_LSL(TARGET_PAGE_BITS));
- /* TODO: alignment check?
- * if (s_bits)
- * tcg_out_data_reg(s, COND_EQ, ARITH_EOR,
- * 0, 1, 8, SHIFT_IMM_LSR(32 - s_bits));
- */
+ /* Check alignment. */
+ if (s_bits)
+ tcg_out_dat_imm(s, COND_EQ, ARITH_TST,
+ 0, addr_reg, (1 << s_bits) - 1);
# if TARGET_LONG_BITS == 64
/* XXX: possibly we could use a block data load or writeback in
* the first access. */
@@ -918,15 +914,13 @@ static inline void tcg_out_qemu_ld(TCGContext *s, int cond,
tcg_out_ld32_r(s, COND_EQ, data_reg, addr_reg, 1);
break;
case 3:
- /* TODO: must write back */
- tcg_out_ld32_r(s, COND_EQ, data_reg, 1, addr_reg);
+ tcg_out_ld32_rwb(s, COND_EQ, data_reg, 1, addr_reg);
tcg_out_ld32_12(s, COND_EQ, data_reg2, 1, 4);
break;
}
label_ptr = (void *) s->code_ptr;
tcg_out_b(s, COND_EQ, 8);
-# endif
# ifdef SAVE_LR
tcg_out_dat_reg(s, cond, ARITH_MOV, 8, 0, 14, SHIFT_IMM_LSL(0));
@@ -969,12 +963,11 @@ static inline void tcg_out_qemu_ld(TCGContext *s, int cond,
data_reg, 0, 0, SHIFT_IMM_LSL(0));
break;
case 3:
+ tcg_out_dat_reg(s, cond, ARITH_MOV,
+ data_reg, 0, 0, SHIFT_IMM_LSL(0));
if (data_reg2 != 1)
tcg_out_dat_reg(s, cond, ARITH_MOV,
data_reg2, 0, 1, SHIFT_IMM_LSL(0));
- if (data_reg != 0)
- tcg_out_dat_reg(s, cond, ARITH_MOV,
- data_reg, 0, 0, SHIFT_IMM_LSL(0));
break;
}
@@ -982,9 +975,7 @@ static inline void tcg_out_qemu_ld(TCGContext *s, int cond,
tcg_out_dat_reg(s, cond, ARITH_MOV, 14, 0, 8, SHIFT_IMM_LSL(0));
# endif
-# ifdef USE_TLB
*label_ptr += ((void *) s->code_ptr - (void *) label_ptr - 8) >> 2;
-# endif
#else
switch (opc) {
case 0:
@@ -1021,9 +1012,7 @@ static inline void tcg_out_qemu_st(TCGContext *s, int cond,
# if TARGET_LONG_BITS == 64
int addr_reg2;
# endif
-# ifdef USE_TLB
uint32_t *label_ptr;
-# endif
#endif
data_reg = *args++;
@@ -1039,14 +1028,13 @@ static inline void tcg_out_qemu_st(TCGContext *s, int cond,
mem_index = *args;
s_bits = opc & 3;
-# ifdef USE_TLB
/* Should generate something like the following:
- * ror r8, addr_reg, #TARGET_PAGE_BITS
+ * shr r8, addr_reg, #TARGET_PAGE_BITS
* and r0, r8, #(CPU_TLB_SIZE - 1) @ Assumption: CPU_TLB_BITS <= 8
- * add r0, T0, r0 lsl #CPU_TLB_ENTRY_BITS
+ * add r0, env, r0 lsl #CPU_TLB_ENTRY_BITS
*/
tcg_out_dat_reg(s, COND_AL, ARITH_MOV,
- 8, 0, addr_reg, SHIFT_IMM_ROR(TARGET_PAGE_BITS));
+ 8, 0, addr_reg, SHIFT_IMM_LSR(TARGET_PAGE_BITS));
tcg_out_dat_imm(s, COND_AL, ARITH_AND,
0, 8, CPU_TLB_SIZE - 1);
tcg_out_dat_reg(s, COND_AL, ARITH_ADD,
@@ -1066,11 +1054,10 @@ static inline void tcg_out_qemu_st(TCGContext *s, int cond,
offsetof(CPUState, tlb_table[0][0].addr_write));
tcg_out_dat_reg(s, COND_AL, ARITH_CMP,
0, 1, 8, SHIFT_IMM_LSL(TARGET_PAGE_BITS));
- /* TODO: alignment check?
- * if (s_bits)
- * tcg_out_data_reg(s, COND_EQ, ARITH_EOR,
- * 0, 1, 8, SHIFT_IMM_LSR(32 - s_bits));
- */
+ /* Check alignment. */
+ if (s_bits)
+ tcg_out_dat_imm(s, COND_EQ, ARITH_TST,
+ 0, addr_reg, (1 << s_bits) - 1);
# if TARGET_LONG_BITS == 64
/* XXX: possibly we could use a block data load or writeback in
* the first access. */
@@ -1101,15 +1088,13 @@ static inline void tcg_out_qemu_st(TCGContext *s, int cond,
tcg_out_st32_r(s, COND_EQ, data_reg, addr_reg, 1);
break;
case 3:
- /* TODO: must write back */
- tcg_out_st32_r(s, COND_EQ, data_reg, 1, addr_reg);
+ tcg_out_st32_rwb(s, COND_EQ, data_reg, 1, addr_reg);
tcg_out_st32_12(s, COND_EQ, data_reg2, 1, 4);
break;
}
label_ptr = (void *) s->code_ptr;
tcg_out_b(s, COND_EQ, 8);
-# endif
/* TODO: move this code to where the constants pool will be */
if (addr_reg)
@@ -1195,9 +1180,7 @@ static inline void tcg_out_qemu_st(TCGContext *s, int cond,
tcg_out_dat_reg(s, cond, ARITH_MOV, 14, 0, 8, SHIFT_IMM_LSL(0));
# endif
-# ifdef USE_TLB
*label_ptr += ((void *) s->code_ptr - (void *) label_ptr - 8) >> 2;
-# endif
#else
switch (opc) {
case 0:
@@ -1512,12 +1495,12 @@ static const TCGTargetOpDef arm_op_defs[] = {
{ INDEX_op_qemu_ld16u, { "r", "x", "X" } },
{ INDEX_op_qemu_ld16s, { "r", "x", "X" } },
{ INDEX_op_qemu_ld32u, { "r", "x", "X" } },
- { INDEX_op_qemu_ld64, { "r", "d", "x", "X" } },
+ { INDEX_op_qemu_ld64, { "x", "r", "x", "X" } },
- { INDEX_op_qemu_st8, { "d", "x", "X" } },
- { INDEX_op_qemu_st16, { "d", "x", "X" } },
- { INDEX_op_qemu_st32, { "d", "x", "X" } },
- { INDEX_op_qemu_st64, { "d", "D", "x", "X" } },
+ { INDEX_op_qemu_st8, { "x", "x", "X" } },
+ { INDEX_op_qemu_st16, { "x", "x", "X" } },
+ { INDEX_op_qemu_st32, { "x", "x", "X" } },
+ { INDEX_op_qemu_st64, { "x", "D", "x", "X" } },
{ INDEX_op_ext8s_i32, { "r", "r" } },
{ INDEX_op_ext16s_i32, { "r", "r" } },
generated by cgit v1.2.3 (git 2.26.2) at 2024-11-30 19:32:28 +0000