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PPC TCG Fixes 

* Fix typo in aliased div2
* "Optimize" aliased div2/divu2
* Fix two remaining branch retranslation problems
  (Kudos to Andrzej Zaborowski)
* Rework goto_tb and set_jmp_target1
* Use correct size when flushing icache
* Use correct register selection for ORI
  (Was harmless since in both cases srcreg was equal to dstreg)



git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@4691 c046a42c-6fe2-441c-8c8c-71466251a162
This commit is contained in:
malc 2008-06-07 20:31:33 +00:00
parent 1a14026e11
commit 0a878c4760
2 changed files with 37 additions and 48 deletions
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35
exec-all.h
View File

@ -184,32 +184,37 @@ extern int code_gen_max_blocks;
#if defined(USE_DIRECT_JUMP)
#if defined(__powerpc__)
static inline void flush_icache_range(unsigned long start, unsigned long stop);
static inline void tb_set_jmp_target1(unsigned long jmp_addr, unsigned long addr)
{
uint32_t val, *ptr;
/* This must be in concord with INDEX_op_goto_tb inside tcg_out_op */
uint32_t *ptr;
long disp = addr - jmp_addr;
unsigned long patch_size;
ptr = (uint32_t *)jmp_addr;
val = *ptr;
if ((disp << 6) >> 6 != disp) {
uint16_t *p1;
p1 = (uint16_t *) ptr;
*ptr = (val & ~0x03fffffc) | 4;
p1[3] = addr >> 16;
p1[5] = addr & 0xffff;
ptr[0] = 0x3c000000 | (addr >> 16); /* lis 0,addr@ha */
ptr[1] = 0x60000000 | (addr & 0xffff); /* la 0,addr@l(0) */
ptr[2] = 0x7c0903a6; /* mtctr 0 */
ptr[3] = 0x4e800420; /* brctr */
patch_size = 16;
} else {
/* patch the branch destination */
val = (val & ~0x03fffffc) | (disp & 0x03fffffc);
*ptr = val;
if (disp != 16) {
*ptr = 0x48000000 | (disp & 0x03fffffc); /* b disp */
patch_size = 4;
} else {
ptr[0] = 0x60000000; /* nop */
ptr[1] = 0x60000000;
ptr[2] = 0x60000000;
ptr[3] = 0x60000000;
patch_size = 16;
}
}
/* flush icache */
asm volatile ("dcbst 0,%0" : : "r"(ptr) : "memory");
asm volatile ("sync" : : : "memory");
asm volatile ("icbi 0,%0" : : "r"(ptr) : "memory");
asm volatile ("sync" : : : "memory");
asm volatile ("isync" : : : "memory");
flush_icache_range(jmp_addr, jmp_addr + patch_size);
}
#elif defined(__i386__) || defined(__x86_64__)
static inline void tb_set_jmp_target1(unsigned long jmp_addr, unsigned long addr)

50
tcg/ppc/tcg-target.c
View File

@ -388,7 +388,7 @@ static void tcg_out_movi(TCGContext *s, TCGType type,
else {
tcg_out32 (s, ADDIS | RT (ret) | RA (0) | ((arg >> 16) & 0xffff));
if (arg & 0xffff)
tcg_out32 (s, ORI | RT (ret) | RA (ret) | (arg & 0xffff));
tcg_out32 (s, ORI | RS (ret) | RA (ret) | (arg & 0xffff));
}
}
@ -939,18 +939,14 @@ static void tcg_out_brcond(TCGContext *s, int cond,
tcg_out32 (s, op | RA (arg1) | RB (arg2));
}
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 ();
if (l->has_value)
tcg_out32 (s, tcg_to_bc[cond] | reloc_pc14_val (s->code_ptr,
l->u.value));
}
else {
tcg_out32 (s, tcg_to_bc[cond]);
uint16_t val = *(uint16_t *) &s->code_ptr[2];
/* Thanks to Andrzej Zaborowski */
tcg_out32 (s, tcg_to_bc[cond] | (val & 0xfffc));
tcg_out_reloc (s, s->code_ptr - 4, R_PPC_REL14, label_index, 0);
}
}
@ -1029,24 +1025,9 @@ static void tcg_out_op(TCGContext *s, int opc, const TCGArg *args,
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;
/* 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);
s->code_ptr += 16;
}
else {
tcg_abort ();
@ -1061,7 +1042,10 @@ static void tcg_out_op(TCGContext *s, int opc, const TCGArg *args,
tcg_out_b (s, 0, l->u.value);
}
else {
tcg_out32 (s, B);
uint32_t val = *(uint32_t *) s->code_ptr;
/* Thanks to Andrzej Zaborowski */
tcg_out32 (s, B | (val & 0x3fffffc));
tcg_out_reloc (s, s->code_ptr - 4, R_PPC_REL24, args[0], 0);
}
}
@ -1222,10 +1206,10 @@ static void tcg_out_op(TCGContext *s, int opc, const TCGArg *args,
case INDEX_op_div2_i32:
if (args[0] == args[2] || args[0] == args[3]) {
tcg_out32 (s, DIVW | TAB (0, args[2], args[3]));
tcg_out32 (s, MTSPR | RS (0) | CTR);
tcg_out32 (s, MULLW | TAB (0, 0, args[3]));
tcg_out32 (s, SUBF | TAB (0, 0, args[2]));
tcg_out32 (s, DIVW | TAB (args[0], args[2], args[3]));
tcg_out_mov (s, args[1], 0);
tcg_out32 (s, SUBF | TAB (args[1], 0, args[2]));
tcg_out32 (s, MFSPR | RT (args[0]) | CTR);
}
else {
tcg_out32 (s, DIVW | TAB (args[0], args[2], args[3]));
@ -1236,10 +1220,10 @@ static void tcg_out_op(TCGContext *s, int opc, const TCGArg *args,
case INDEX_op_divu2_i32:
if (args[0] == args[2] || args[0] == args[3]) {
tcg_out32 (s, DIVWU | TAB (0, args[2], args[3]));
tcg_out32 (s, MTSPR | RS (0) | CTR);
tcg_out32 (s, MULLW | TAB (0, 0, args[3]));
tcg_out32 (s, SUBF | TAB (0, 0, args[2]));
tcg_out32 (s, DIVWU | TAB (args[0], args[2], args[3]));
tcg_out_mov (s, args[1], 0);
tcg_out32 (s, SUBF | TAB (args[1], 0, args[2]));
tcg_out32 (s, MFSPR | RT (args[0]) | CTR);
}
else {
tcg_out32 (s, DIVWU | TAB (args[0], args[2], args[3]));