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From 2cbc27913eb9eb7cdc4a41fc6efafccf3db7ebe6 Mon Sep 17 00:00:00 2001
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From: Richard Henderson <rth@twiddle.net>
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Date: Fri, 21 Sep 2012 11:00:23 -0700
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Subject: [PATCH] tcg-sparc: Preserve branch destinations during retranslation
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Signed-off-by: Richard Henderson <rth@twiddle.net>
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Signed-off-by: Michael Roth <mdroth@linux.vnet.ibm.com>
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---
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tcg/sparc/tcg-target.c | 19 +++++++++++--------
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1 file changed, 11 insertions(+), 8 deletions(-)
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diff --git a/tcg/sparc/tcg-target.c b/tcg/sparc/tcg-target.c
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index 1db0c9d..876da4f 100644
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--- a/tcg/sparc/tcg-target.c
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+++ b/tcg/sparc/tcg-target.c
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@@ -488,30 +488,33 @@ static inline void tcg_out_nop(TCGContext *s)
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static void tcg_out_branch_i32(TCGContext *s, int opc, int label_index)
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{
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TCGLabel *l = &s->labels[label_index];
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+ uint32_t off22;
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if (l->has_value) {
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- tcg_out32(s, (INSN_OP(0) | INSN_COND(opc, 0) | INSN_OP2(0x2)
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- | INSN_OFF22(l->u.value - (unsigned long)s->code_ptr)));
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+ off22 = INSN_OFF22(l->u.value - (unsigned long)s->code_ptr);
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} else {
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+ /* Make sure to preserve destinations during retranslation. */
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+ off22 = *(uint32_t *)s->code_ptr & INSN_OFF22(-1);
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tcg_out_reloc(s, s->code_ptr, R_SPARC_WDISP22, label_index, 0);
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- tcg_out32(s, (INSN_OP(0) | INSN_COND(opc, 0) | INSN_OP2(0x2) | 0));
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}
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+ tcg_out32(s, INSN_OP(0) | INSN_COND(opc, 0) | INSN_OP2(0x2) | off22);
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}
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#if TCG_TARGET_REG_BITS == 64
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static void tcg_out_branch_i64(TCGContext *s, int opc, int label_index)
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{
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TCGLabel *l = &s->labels[label_index];
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+ uint32_t off19;
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if (l->has_value) {
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- tcg_out32(s, (INSN_OP(0) | INSN_COND(opc, 0) | INSN_OP2(0x1) |
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- (0x5 << 19) |
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- INSN_OFF19(l->u.value - (unsigned long)s->code_ptr)));
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+ off19 = INSN_OFF19(l->u.value - (unsigned long)s->code_ptr);
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} else {
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+ /* Make sure to preserve destinations during retranslation. */
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+ off19 = *(uint32_t *)s->code_ptr & INSN_OFF19(-1);
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tcg_out_reloc(s, s->code_ptr, R_SPARC_WDISP19, label_index, 0);
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- tcg_out32(s, (INSN_OP(0) | INSN_COND(opc, 0) | INSN_OP2(0x1) |
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- (0x5 << 19) | 0));
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}
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+ tcg_out32(s, (INSN_OP(0) | INSN_COND(opc, 0) | INSN_OP2(0x1) |
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+ (0x5 << 19) | off19));
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}
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#endif
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