Reimplement brcond2 and refactor brcond
git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@4738 c046a42c-6fe2-441c-8c8c-71466251a162
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malc
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200ae688b2
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c596defdb9
@ -285,6 +285,9 @@ static int tcg_target_const_match(tcg_target_long val,
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#define BCLR XO19( 16)
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#define BCCTR XO19(528)
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#define CRAND XO19(257)
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#define CRANDC XO19(129)
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#define CRNAND XO19(225)
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#define CROR XO19(449)
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#define EXTSB XO31(954)
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#define EXTSH XO31(922)
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@ -870,11 +873,9 @@ static void tcg_out_addi(TCGContext *s, int reg, tcg_target_long val)
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ppc_addi (s, reg, reg, val);
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}
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static void tcg_out_brcond(TCGContext *s, int cond,
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TCGArg arg1, TCGArg arg2, int const_arg2,
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int label_index)
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static void tcg_out_cmp (TCGContext *s, int cond, TCGArg arg1, TCGArg arg2,
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int const_arg2, int cr)
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{
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TCGLabel *l = &s->labels[label_index];
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int imm;
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uint32_t op;
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@ -930,7 +931,7 @@ static void tcg_out_brcond(TCGContext *s, int cond,
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default:
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tcg_abort ();
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}
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op |= BF (7);
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op |= BF (cr);
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if (imm)
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tcg_out32 (s, op | RA (arg1) | (arg2 & 0xffff));
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@ -943,79 +944,79 @@ static void tcg_out_brcond(TCGContext *s, int cond,
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tcg_out32 (s, op | RA (arg1) | RB (arg2));
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}
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}
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static void tcg_out_bc (TCGContext *s, int bc, int label_index)
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{
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TCGLabel *l = &s->labels[label_index];
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if (l->has_value)
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tcg_out32 (s, tcg_to_bc[cond] | reloc_pc14_val (s->code_ptr,
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l->u.value));
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tcg_out32 (s, bc | reloc_pc14_val (s->code_ptr, l->u.value));
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else {
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uint16_t val = *(uint16_t *) &s->code_ptr[2];
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/* Thanks to Andrzej Zaborowski */
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tcg_out32 (s, tcg_to_bc[cond] | (val & 0xfffc));
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tcg_out32 (s, bc | (val & 0xfffc));
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tcg_out_reloc (s, s->code_ptr - 4, R_PPC_REL14, label_index, 0);
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}
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}
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/* brcond2 is taken verbatim from i386 tcg-target */
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static void tcg_out_brcond (TCGContext *s, int cond,
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TCGArg arg1, TCGArg arg2, int const_arg2,
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int label_index)
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{
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tcg_out_cmp (s, cond, arg1, arg2, const_arg2, 7);
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tcg_out_bc (s, tcg_to_bc[cond], label_index);
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}
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/* XXX: we implement it at the target level to avoid having to
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handle cross basic blocks temporaries */
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static void tcg_out_brcond2(TCGContext *s,
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const TCGArg *args, const int *const_args)
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static void tcg_out_brcond2 (TCGContext *s, const TCGArg *args,
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const int *const_args)
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{
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int label_next;
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label_next = gen_new_label();
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switch(args[4]) {
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int cond = args[4], label_index = args[5], op;
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struct { int bit1; int bit2; int cond2; } bits[] = {
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[TCG_COND_LT ] = { CR_LT, CR_LT, TCG_COND_LT },
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[TCG_COND_LE ] = { CR_LT, CR_GT, TCG_COND_LT },
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[TCG_COND_GT ] = { CR_GT, CR_GT, TCG_COND_GT },
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[TCG_COND_GE ] = { CR_GT, CR_LT, TCG_COND_GT },
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[TCG_COND_LTU] = { CR_LT, CR_LT, TCG_COND_LTU },
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[TCG_COND_LEU] = { CR_LT, CR_GT, TCG_COND_LTU },
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[TCG_COND_GTU] = { CR_GT, CR_GT, TCG_COND_GTU },
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[TCG_COND_GEU] = { CR_GT, CR_LT, TCG_COND_GTU },
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}, *b = &bits[cond];
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switch (cond) {
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case TCG_COND_EQ:
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tcg_out_brcond(s, TCG_COND_NE, args[0], args[2], const_args[2], label_next);
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tcg_out_brcond(s, TCG_COND_EQ, args[1], args[3], const_args[3], args[5]);
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tcg_out_cmp (s, TCG_COND_EQ, args[0], args[2], const_args[2], 6);
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tcg_out_cmp (s, TCG_COND_EQ, args[1], args[3], const_args[3], 7);
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tcg_out32 (s, CRAND | BT (7, CR_EQ) | BA (6, CR_EQ) | BB (7, CR_EQ));
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break;
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case TCG_COND_NE:
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tcg_out_brcond(s, TCG_COND_NE, args[0], args[2], const_args[2], args[5]);
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tcg_out_brcond(s, TCG_COND_NE, args[1], args[3], const_args[3], args[5]);
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tcg_out_cmp (s, TCG_COND_NE, args[0], args[2], const_args[2], 6);
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tcg_out_cmp (s, TCG_COND_NE, args[1], args[3], const_args[3], 7);
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tcg_out32 (s, CRNAND | BT (7, CR_EQ) | BA (6, CR_EQ) | BB (7, CR_EQ));
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break;
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case TCG_COND_LT:
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tcg_out_brcond(s, TCG_COND_LT, args[1], args[3], const_args[3], args[5]);
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tcg_out_brcond(s, TCG_COND_NE, args[1], args[3], const_args[3], label_next);
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tcg_out_brcond(s, TCG_COND_LT, args[0], args[2], const_args[2], args[5]);
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break;
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case TCG_COND_LE:
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tcg_out_brcond(s, TCG_COND_LT, args[1], args[3], const_args[3], args[5]);
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tcg_out_brcond(s, TCG_COND_NE, args[1], args[3], const_args[3], label_next);
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tcg_out_brcond(s, TCG_COND_LE, args[0], args[2], const_args[2], args[5]);
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break;
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case TCG_COND_GT:
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tcg_out_brcond(s, TCG_COND_GT, args[1], args[3], const_args[3], args[5]);
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tcg_out_brcond(s, TCG_COND_NE, args[1], args[3], const_args[3], label_next);
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tcg_out_brcond(s, TCG_COND_GT, args[0], args[2], const_args[2], args[5]);
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break;
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case TCG_COND_GE:
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tcg_out_brcond(s, TCG_COND_GT, args[1], args[3], const_args[3], args[5]);
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tcg_out_brcond(s, TCG_COND_NE, args[1], args[3], const_args[3], label_next);
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tcg_out_brcond(s, TCG_COND_GE, args[0], args[2], const_args[2], args[5]);
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break;
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case TCG_COND_LTU:
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tcg_out_brcond(s, TCG_COND_LTU, args[1], args[3], const_args[3], args[5]);
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tcg_out_brcond(s, TCG_COND_NE, args[1], args[3], const_args[3], label_next);
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tcg_out_brcond(s, TCG_COND_LTU, args[0], args[2], const_args[2], args[5]);
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break;
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case TCG_COND_LEU:
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tcg_out_brcond(s, TCG_COND_LTU, args[1], args[3], const_args[3], args[5]);
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tcg_out_brcond(s, TCG_COND_NE, args[1], args[3], const_args[3], label_next);
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tcg_out_brcond(s, TCG_COND_LEU, args[0], args[2], const_args[2], args[5]);
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break;
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case TCG_COND_GTU:
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tcg_out_brcond(s, TCG_COND_GTU, args[1], args[3], const_args[3], args[5]);
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tcg_out_brcond(s, TCG_COND_NE, args[1], args[3], const_args[3], label_next);
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tcg_out_brcond(s, TCG_COND_GTU, args[0], args[2], const_args[2], args[5]);
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break;
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case TCG_COND_GEU:
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tcg_out_brcond(s, TCG_COND_GTU, args[1], args[3], const_args[3], args[5]);
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tcg_out_brcond(s, TCG_COND_NE, args[1], args[3], const_args[3], label_next);
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tcg_out_brcond(s, TCG_COND_GEU, args[0], args[2], const_args[2], args[5]);
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op = (b->bit1 != b->bit2) ? CRANDC : CRAND;
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tcg_out_cmp (s, b->cond2, args[1], args[3], const_args[3], 5);
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tcg_out_cmp (s, TCG_COND_EQ, args[1], args[3], const_args[3], 6);
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tcg_out_cmp (s, cond, args[0], args[2], const_args[2], 7);
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tcg_out32 (s, op | BT (7, CR_EQ) | BA (6, CR_EQ) | BB (7, b->bit2));
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tcg_out32 (s, CROR | BT (7, CR_EQ) | BA (5, b->bit1) | BB (7, CR_EQ));
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break;
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default:
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tcg_abort();
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}
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tcg_out_label(s, label_next, (tcg_target_long)s->code_ptr);
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tcg_out_bc (s, (BC | BI (7, CR_EQ) | BO_COND_TRUE), label_index);
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}
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static void tcg_out_op(TCGContext *s, int opc, const TCGArg *args,
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