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tcg-sparc: Preserve branch destinations during retranslation 

Signed-off-by: Richard Henderson <rth@twiddle.net>
Signed-off-by: Michael Roth <mdroth@linux.vnet.ibm.com>
This commit is contained in:
Richard Henderson 2012-09-21 11:00:23 -07:00 committed by Michael Roth
parent 38df9027ce
commit fef28a4336
1 changed files with 11 additions and 8 deletions
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19
tcg/sparc/tcg-target.c
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@ -488,30 +488,33 @@ static inline void tcg_out_nop(TCGContext *s)
static void tcg_out_branch_i32(TCGContext *s, int opc, int label_index) static void tcg_out_branch_i32(TCGContext *s, int opc, int label_index)
{ {
TCGLabel *l = &s->labels[label_index]; TCGLabel *l = &s->labels[label_index];
uint32_t off22;
if (l->has_value) { if (l->has_value) {
tcg_out32(s, (INSN_OP(0) | INSN_COND(opc, 0) | INSN_OP2(0x2) off22 = INSN_OFF22(l->u.value - (unsigned long)s->code_ptr);
| INSN_OFF22(l->u.value - (unsigned long)s->code_ptr)));
} else { } else {
/* Make sure to preserve destinations during retranslation. */
off22 = *(uint32_t *)s->code_ptr & INSN_OFF22(-1);
tcg_out_reloc(s, s->code_ptr, R_SPARC_WDISP22, label_index, 0); tcg_out_reloc(s, s->code_ptr, R_SPARC_WDISP22, label_index, 0);
tcg_out32(s, (INSN_OP(0) | INSN_COND(opc, 0) | INSN_OP2(0x2) | 0));
} }
tcg_out32(s, INSN_OP(0) | INSN_COND(opc, 0) | INSN_OP2(0x2) | off22);
} }
#if TCG_TARGET_REG_BITS == 64 #if TCG_TARGET_REG_BITS == 64
static void tcg_out_branch_i64(TCGContext *s, int opc, int label_index) static void tcg_out_branch_i64(TCGContext *s, int opc, int label_index)
{ {
TCGLabel *l = &s->labels[label_index]; TCGLabel *l = &s->labels[label_index];
uint32_t off19;
if (l->has_value) { if (l->has_value) {
tcg_out32(s, (INSN_OP(0) | INSN_COND(opc, 0) | INSN_OP2(0x1) | off19 = INSN_OFF19(l->u.value - (unsigned long)s->code_ptr);
(0x5 << 19) |
INSN_OFF19(l->u.value - (unsigned long)s->code_ptr)));
} else { } else {
/* Make sure to preserve destinations during retranslation. */
off19 = *(uint32_t *)s->code_ptr & INSN_OFF19(-1);
tcg_out_reloc(s, s->code_ptr, R_SPARC_WDISP19, label_index, 0); tcg_out_reloc(s, s->code_ptr, R_SPARC_WDISP19, label_index, 0);
tcg_out32(s, (INSN_OP(0) | INSN_COND(opc, 0) | INSN_OP2(0x1) |
(0x5 << 19) | 0));
} }
tcg_out32(s, (INSN_OP(0) | INSN_COND(opc, 0) | INSN_OP2(0x1) |
(0x5 << 19) | off19));
} }
#endif #endif