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提交 c596defd 编写于 作者: M malc
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Reimplement brcond2 and refactor brcond 


git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@4738 c046a42c-6fe2-441c-8c8c-71466251a162
上级 200ae688
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Showing with 52 addition and 51 deletion
tcg/ppc/tcg-target.c
浏览文件 @ c596defd
...@@ -282,9 +282,12 @@ static int tcg_target_const_match(tcg_target_long val, ...@@ -282,9 +282,12 @@ static int tcg_target_const_match(tcg_target_long val,
#define RLWINM OPCD(21) #define RLWINM OPCD(21)
#define BCLR XO19(16) #define BCLR XO19( 16)
#define BCCTR XO19(528) #define BCCTR XO19(528)
#define CRAND XO19(257) #define CRAND XO19(257)
#define CRANDC XO19(129)
#define CRNAND XO19(225)
#define CROR XO19(449)
#define EXTSB XO31(954) #define EXTSB XO31(954)
#define EXTSH XO31(922) #define EXTSH XO31(922)
...@@ -870,11 +873,9 @@ static void tcg_out_addi(TCGContext *s, int reg, tcg_target_long val) ...@@ -870,11 +873,9 @@ static void tcg_out_addi(TCGContext *s, int reg, tcg_target_long val)
ppc_addi (s, reg, reg, val); ppc_addi (s, reg, reg, val);
} }
static void tcg_out_brcond(TCGContext *s, int cond, static void tcg_out_cmp (TCGContext *s, int cond, TCGArg arg1, TCGArg arg2,
TCGArg arg1, TCGArg arg2, int const_arg2, int const_arg2, int cr)
int label_index)
{ {
TCGLabel *l = &s->labels[label_index];
int imm; int imm;
uint32_t op; uint32_t op;
...@@ -930,7 +931,7 @@ static void tcg_out_brcond(TCGContext *s, int cond, ...@@ -930,7 +931,7 @@ static void tcg_out_brcond(TCGContext *s, int cond,
default: default:
tcg_abort (); tcg_abort ();
} }
op |= BF (7); op |= BF (cr);
if (imm) if (imm)
tcg_out32 (s, op | RA (arg1) | (arg2 & 0xffff)); tcg_out32 (s, op | RA (arg1) | (arg2 & 0xffff));
...@@ -943,79 +944,79 @@ static void tcg_out_brcond(TCGContext *s, int cond, ...@@ -943,79 +944,79 @@ static void tcg_out_brcond(TCGContext *s, int cond,
tcg_out32 (s, op | RA (arg1) | RB (arg2)); tcg_out32 (s, op | RA (arg1) | RB (arg2));
} }
}
static void tcg_out_bc (TCGContext *s, int bc, int label_index)
{
TCGLabel *l = &s->labels[label_index];
if (l->has_value) if (l->has_value)
tcg_out32 (s, tcg_to_bc[cond] | reloc_pc14_val (s->code_ptr, tcg_out32 (s, bc | reloc_pc14_val (s->code_ptr, l->u.value));
l->u.value));
else { else {
uint16_t val = *(uint16_t *) &s->code_ptr[2]; uint16_t val = *(uint16_t *) &s->code_ptr[2];
/* Thanks to Andrzej Zaborowski */ /* Thanks to Andrzej Zaborowski */
tcg_out32 (s, tcg_to_bc[cond] | (val & 0xfffc)); tcg_out32 (s, bc | (val & 0xfffc));
tcg_out_reloc (s, s->code_ptr - 4, R_PPC_REL14, label_index, 0); tcg_out_reloc (s, s->code_ptr - 4, R_PPC_REL14, label_index, 0);
} }
} }
/* brcond2 is taken verbatim from i386 tcg-target */ static void tcg_out_brcond (TCGContext *s, int cond,
TCGArg arg1, TCGArg arg2, int const_arg2,
int label_index)
{
tcg_out_cmp (s, cond, arg1, arg2, const_arg2, 7);
tcg_out_bc (s, tcg_to_bc[cond], label_index);
}
/* XXX: we implement it at the target level to avoid having to /* XXX: we implement it at the target level to avoid having to
handle cross basic blocks temporaries */ handle cross basic blocks temporaries */
static void tcg_out_brcond2(TCGContext *s, static void tcg_out_brcond2 (TCGContext *s, const TCGArg *args,
const TCGArg *args, const int *const_args) const int *const_args)
{ {
int label_next; int cond = args[4], label_index = args[5], op;
label_next = gen_new_label(); struct { int bit1; int bit2; int cond2; } bits[] = {
switch(args[4]) { [TCG_COND_LT ] = { CR_LT, CR_LT, TCG_COND_LT },
[TCG_COND_LE ] = { CR_LT, CR_GT, TCG_COND_LT },
[TCG_COND_GT ] = { CR_GT, CR_GT, TCG_COND_GT },
[TCG_COND_GE ] = { CR_GT, CR_LT, TCG_COND_GT },
[TCG_COND_LTU] = { CR_LT, CR_LT, TCG_COND_LTU },
[TCG_COND_LEU] = { CR_LT, CR_GT, TCG_COND_LTU },
[TCG_COND_GTU] = { CR_GT, CR_GT, TCG_COND_GTU },
[TCG_COND_GEU] = { CR_GT, CR_LT, TCG_COND_GTU },
}, *b = &bits[cond];
switch (cond) {
case TCG_COND_EQ: case TCG_COND_EQ:
tcg_out_brcond(s, TCG_COND_NE, args[0], args[2], const_args[2], label_next); tcg_out_cmp (s, TCG_COND_EQ, args[0], args[2], const_args[2], 6);
tcg_out_brcond(s, TCG_COND_EQ, args[1], args[3], const_args[3], args[5]); tcg_out_cmp (s, TCG_COND_EQ, args[1], args[3], const_args[3], 7);
tcg_out32 (s, CRAND | BT (7, CR_EQ) | BA (6, CR_EQ) | BB (7, CR_EQ));
break; break;
case TCG_COND_NE: case TCG_COND_NE:
tcg_out_brcond(s, TCG_COND_NE, args[0], args[2], const_args[2], args[5]); tcg_out_cmp (s, TCG_COND_NE, args[0], args[2], const_args[2], 6);
tcg_out_brcond(s, TCG_COND_NE, args[1], args[3], const_args[3], args[5]); tcg_out_cmp (s, TCG_COND_NE, args[1], args[3], const_args[3], 7);
tcg_out32 (s, CRNAND | BT (7, CR_EQ) | BA (6, CR_EQ) | BB (7, CR_EQ));
break; break;
case TCG_COND_LT: case TCG_COND_LT:
tcg_out_brcond(s, TCG_COND_LT, args[1], args[3], const_args[3], args[5]);
tcg_out_brcond(s, TCG_COND_NE, args[1], args[3], const_args[3], label_next);
tcg_out_brcond(s, TCG_COND_LT, args[0], args[2], const_args[2], args[5]);
break;
case TCG_COND_LE: case TCG_COND_LE:
tcg_out_brcond(s, TCG_COND_LT, args[1], args[3], const_args[3], args[5]);
tcg_out_brcond(s, TCG_COND_NE, args[1], args[3], const_args[3], label_next);
tcg_out_brcond(s, TCG_COND_LE, args[0], args[2], const_args[2], args[5]);
break;
case TCG_COND_GT: case TCG_COND_GT:
tcg_out_brcond(s, TCG_COND_GT, args[1], args[3], const_args[3], args[5]);
tcg_out_brcond(s, TCG_COND_NE, args[1], args[3], const_args[3], label_next);
tcg_out_brcond(s, TCG_COND_GT, args[0], args[2], const_args[2], args[5]);
break;
case TCG_COND_GE: case TCG_COND_GE:
tcg_out_brcond(s, TCG_COND_GT, args[1], args[3], const_args[3], args[5]);
tcg_out_brcond(s, TCG_COND_NE, args[1], args[3], const_args[3], label_next);
tcg_out_brcond(s, TCG_COND_GE, args[0], args[2], const_args[2], args[5]);
break;
case TCG_COND_LTU: case TCG_COND_LTU:
tcg_out_brcond(s, TCG_COND_LTU, args[1], args[3], const_args[3], args[5]);
tcg_out_brcond(s, TCG_COND_NE, args[1], args[3], const_args[3], label_next);
tcg_out_brcond(s, TCG_COND_LTU, args[0], args[2], const_args[2], args[5]);
break;
case TCG_COND_LEU: case TCG_COND_LEU:
tcg_out_brcond(s, TCG_COND_LTU, args[1], args[3], const_args[3], args[5]);
tcg_out_brcond(s, TCG_COND_NE, args[1], args[3], const_args[3], label_next);
tcg_out_brcond(s, TCG_COND_LEU, args[0], args[2], const_args[2], args[5]);
break;
case TCG_COND_GTU: case TCG_COND_GTU:
tcg_out_brcond(s, TCG_COND_GTU, args[1], args[3], const_args[3], args[5]);
tcg_out_brcond(s, TCG_COND_NE, args[1], args[3], const_args[3], label_next);
tcg_out_brcond(s, TCG_COND_GTU, args[0], args[2], const_args[2], args[5]);
break;
case TCG_COND_GEU: case TCG_COND_GEU:
tcg_out_brcond(s, TCG_COND_GTU, args[1], args[3], const_args[3], args[5]); op = (b->bit1 != b->bit2) ? CRANDC : CRAND;
tcg_out_brcond(s, TCG_COND_NE, args[1], args[3], const_args[3], label_next); tcg_out_cmp (s, b->cond2, args[1], args[3], const_args[3], 5);
tcg_out_brcond(s, TCG_COND_GEU, args[0], args[2], const_args[2], args[5]); tcg_out_cmp (s, TCG_COND_EQ, args[1], args[3], const_args[3], 6);
tcg_out_cmp (s, cond, args[0], args[2], const_args[2], 7);
tcg_out32 (s, op | BT (7, CR_EQ) | BA (6, CR_EQ) | BB (7, b->bit2));
tcg_out32 (s, CROR | BT (7, CR_EQ) | BA (5, b->bit1) | BB (7, CR_EQ));
break; break;
default: default:
tcg_abort(); tcg_abort();
} }
tcg_out_label(s, label_next, (tcg_target_long)s->code_ptr);
tcg_out_bc (s, (BC | BI (7, CR_EQ) | BO_COND_TRUE), label_index);
} }
static void tcg_out_op(TCGContext *s, int opc, const TCGArg *args, static void tcg_out_op(TCGContext *s, int opc, const TCGArg *args,
......
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