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qemu-irix
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support of long calls for PPC (malc) 

git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@4629 c046a42c-6fe2-441c-8c8c-71466251a162
This commit is contained in:
bellard 2008-05-30 20:56:52 +00:00
parent da260249a4
commit 932a690969
3 changed files with 82 additions and 34 deletions
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15
exec-all.h
View File

@ -187,12 +187,23 @@ extern int code_gen_max_blocks;
static inline void tb_set_jmp_target1(unsigned long jmp_addr, unsigned long addr)
{
uint32_t val, *ptr;
long disp = addr - jmp_addr;
/* patch the branch destination */
ptr = (uint32_t *)jmp_addr;
val = *ptr;
val = (val & ~0x03fffffc) | ((addr - jmp_addr) & 0x03fffffc);
if ((disp << 6) >> 6 != disp) {
uint16_t *p1;
p1 = (uint16_t *) ptr;
*ptr = (val & ~0x03fffffc) | 4;
p1[3] = addr >> 16;
p1[5] = addr & 0xffff;
} else {
/* patch the branch destination */
val = (val & ~0x03fffffc) | (disp & 0x03fffffc);
*ptr = val;
}
/* flush icache */
asm volatile ("dcbst 0,%0" : : "r"(ptr) : "memory");
asm volatile ("sync" : : : "memory");

94
tcg/ppc/tcg-target.c
View File

@ -24,9 +24,6 @@
static uint8_t *tb_ret_addr;
#define TCG_CT_PC14 0x100
#define TCG_CT_PC24 0x200
#define FAST_PATH
#if TARGET_PHYS_ADDR_BITS <= 32
#define ADDEND_OFFSET 0
@ -140,7 +137,13 @@ static const int tcg_target_callee_save_regs[] = {
static uint32_t reloc_pc24_val (void *pc, tcg_target_long target)
{
return (target - (tcg_target_long) pc) & 0x3fffffc;
tcg_target_long disp;
disp = target - (tcg_target_long) pc;
if ((disp << 6) >> 6 != disp)
tcg_abort ();
return disp & 0x3fffffc;
}
static void reloc_pc24 (void *pc, tcg_target_long target)
@ -151,7 +154,13 @@ static void reloc_pc24 (void *pc, tcg_target_long target)
static uint16_t reloc_pc14_val (void *pc, tcg_target_long target)
{
return (target - (tcg_target_long) pc) & 0xfffc;
tcg_target_long disp;
disp = target - (tcg_target_long) pc;
if (disp != (int16_t) disp)
tcg_abort ();
return disp & 0xfffc;
}
static void reloc_pc14 (void *pc, tcg_target_long target)
@ -218,12 +227,6 @@ static int target_parse_constraint(TCGArgConstraint *ct, const char **pct_str)
tcg_regset_reset_reg(ct->u.regs, TCG_REG_R6);
tcg_regset_reset_reg(ct->u.regs, TCG_REG_R7);
break;
case 'J': /* 24 bit displacement */
ct->ct |= TCG_CT_PC24;
break;
case 'j': /* 16 bit displacement */
ct->ct |= TCG_CT_PC14;
break;
default:
return -1;
}
@ -241,13 +244,6 @@ static int tcg_target_const_match(tcg_target_long val,
ct = arg_ct->ct;
if (ct & TCG_CT_CONST)
return 1;
else if (ct & TCG_CT_PC14) {
return val == (int16_t) val;
}
else if (ct & TCG_CT_PC24) {
if (val < 0) return val > -0x800000;
return val < 0x7fffff;
}
return 0;
}
@ -407,6 +403,20 @@ static void tcg_out_ldst (TCGContext *s, int ret, int addr,
}
}
static void tcg_out_b (TCGContext *s, int mask, tcg_target_long target)
{
tcg_target_long disp;
disp = target - (tcg_target_long) s->code_ptr;
if ((disp << 6) >> 6 == disp)
tcg_out32 (s, B | disp | mask);
else {
tcg_out_movi (s, TCG_TYPE_I32, 0, (tcg_target_long) target);
tcg_out32 (s, MTSPR | RS (0) | CTR);
tcg_out32 (s, BCCTR | BO_ALWAYS | mask);
}
}
#if defined(CONFIG_SOFTMMU)
extern void __ldb_mmu(void);
extern void __ldw_mmu(void);
@ -507,8 +517,7 @@ static void tcg_out_qemu_ld (TCGContext *s, const TCGArg *args, int opc)
tcg_out_movi (s, TCG_TYPE_I32, 5, mem_index);
#endif
tcg_out32 (s, B | reloc_pc24_val (s->code_ptr,
(tcg_target_long) qemu_ld_helpers[s_bits]) | LK);
tcg_out_b (s, LK, (tcg_target_long) qemu_ld_helpers[s_bits]);
switch (opc) {
case 0|4:
tcg_out32 (s, EXTSB | RA (data_reg) | RS (3));
@ -727,8 +736,7 @@ static void tcg_out_qemu_st (TCGContext *s, const TCGArg *args, int opc)
ir++;
tcg_out_movi (s, TCG_TYPE_I32, ir, mem_index);
tcg_out32 (s, B | reloc_pc24_val (s->code_ptr,
(tcg_target_long) qemu_st_helpers[opc]) | LK);
tcg_out_b (s, LK, (tcg_target_long) qemu_st_helpers[opc]);
label2_ptr = s->code_ptr;
tcg_out32 (s, B);
@ -932,6 +940,12 @@ static void tcg_out_brcond(TCGContext *s, int cond,
}
if (l->has_value) {
tcg_target_long disp;
disp = (tcg_target_long) s->code_ptr - l->u.value;
if (disp != (int16_t) disp)
tcg_abort ();
tcg_out32 (s, tcg_to_bc[cond] | reloc_pc14_val (s->code_ptr,
l->u.value));
}
@ -1010,14 +1024,31 @@ static void tcg_out_op(TCGContext *s, int opc, const TCGArg *args,
switch (opc) {
case INDEX_op_exit_tb:
tcg_out_movi (s, TCG_TYPE_I32, TCG_REG_R3, args[0]);
tcg_out32 (s, B | reloc_pc24_val (s->code_ptr, (tcg_target_long) tb_ret_addr));
tcg_out_b (s, 0, (tcg_target_long) tb_ret_addr);
break;
case INDEX_op_goto_tb:
if (s->tb_jmp_offset) {
/* direct jump method */
uint32_t val;
uint16_t *p;
s->tb_jmp_offset[args[0]] = s->code_ptr - s->code_buf;
tcg_out32 (s, B | 4);
} else {
/* Thanks to Andrzej Zaborowski for this */
val = *(uint32_t *) s->code_ptr & 0x3fffffc;
tcg_out32 (s, B | val);
/* For branches outside of LL range
This must be in concord with tb_set_jmp_target1 */
p = (uint16_t *) s->code_ptr;
p[0] = (ADDIS | RT (0) | RA (0)) >> 16;
p[2] = (ORI | RT (0) | RA (0)) >> 16;
s->code_ptr += 8;
tcg_out32 (s, MTSPR | RS (0) | CTR);
tcg_out32 (s, BCCTR | BO_ALWAYS);
}
else {
tcg_abort ();
}
s->tb_next_offset[args[0]] = s->code_ptr - s->code_buf;
@ -1027,7 +1058,7 @@ static void tcg_out_op(TCGContext *s, int opc, const TCGArg *args,
TCGLabel *l = &s->labels[args[0]];
if (l->has_value) {
tcg_out32 (s, B | reloc_pc24_val (s->code_ptr, l->u.value));
tcg_out_b (s, 0, l->u.value);
}
else {
tcg_out32 (s, B);
@ -1037,7 +1068,7 @@ static void tcg_out_op(TCGContext *s, int opc, const TCGArg *args,
break;
case INDEX_op_call:
if (const_args[0]) {
tcg_out32 (s, B | reloc_pc24_val (s->code_ptr, args[0]) | LK);
tcg_out_b (s, LK, args[0]);
}
else {
tcg_out32 (s, MTSPR | RS (args[0]) | LR);
@ -1046,7 +1077,7 @@ static void tcg_out_op(TCGContext *s, int opc, const TCGArg *args,
break;
case INDEX_op_jmp:
if (const_args[0]) {
tcg_out32 (s, B | reloc_pc24_val (s->code_ptr, args[0]));
tcg_out_b (s, 0, args[0]);
}
else {
tcg_out32 (s, MTSPR | RS (args[0]) | CTR);
@ -1122,7 +1153,8 @@ static void tcg_out_op(TCGContext *s, int opc, const TCGArg *args,
if (const_args[2]) {
if (args[2]) {
if (args[2] & 0xffff) {
tcg_out32 (s, ORI | RS (args[1]) | RA (args[0]) | (args[2] & 0xffff));
tcg_out32 (s, ORI | RS (args[1]) | RA (args[0])
| (args[2] & 0xffff));
if (args[2] >> 16)
tcg_out32 (s, ORIS | RS (args[0]) | RA (args[0])
| ((args[2] >> 16) & 0xffff));
@ -1338,8 +1370,8 @@ static void tcg_out_op(TCGContext *s, int opc, const TCGArg *args,
static const TCGTargetOpDef ppc_op_defs[] = {
{ INDEX_op_exit_tb, { } },
{ INDEX_op_goto_tb, { } },
{ INDEX_op_call, { "rJ" } },
{ INDEX_op_jmp, { "rJ" } },
{ INDEX_op_call, { "ri" } },
{ INDEX_op_jmp, { "ri" } },
{ INDEX_op_br, { } },
{ INDEX_op_mov_i32, { "r", "r" } },

5
tcg/tcg.h
View File

@ -410,4 +410,9 @@ uint64_t tcg_helper_divu_i64(uint64_t arg1, uint64_t arg2);
uint64_t tcg_helper_remu_i64(uint64_t arg1, uint64_t arg2);
extern uint8_t code_gen_prologue[];
#ifdef __powerpc__
#define tcg_qemu_tb_exec(tb_ptr) \
((long REGPARM __attribute__ ((longcall)) (*)(void *))code_gen_prologue)(tb_ptr)
#else
#define tcg_qemu_tb_exec(tb_ptr) ((long REGPARM (*)(void *))code_gen_prologue)(tb_ptr)
#endif