[PATCH v4 19/31] target/ppc: Move page crossing check to ppc_tr_translate_insn

[matheus.ferst@eldorado.org.br]

From: Richard Henderson <richard.henderson@linaro.org>

With prefixed instructions, the number of instructions
remaining until the page crossing is no longer constant.

Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Matheus Ferst <matheus.ferst@eldorado.org.br>
---
 target/ppc/translate.c | 8 +++++---
 1 file changed, 5 insertions(+), 3 deletions(-)

diff --git a/target/ppc/translate.c b/target/ppc/translate.c
index 153c61e8ec..dec2ff1886 100644
--- a/target/ppc/translate.c
+++ b/target/ppc/translate.c
@@ -9251,9 +9251,6 @@ static void ppc_tr_init_disas_context(DisasContextBase *dcbase, CPUState *cs)
 
     if (ctx->singlestep_enabled & (CPU_SINGLE_STEP | GDBSTUB_SINGLE_STEP)) {
         ctx->base.max_insns = 1;
-    } else {
-        int bound = -(ctx->base.pc_first | TARGET_PAGE_MASK) / 4;
-        ctx->base.max_insns = MIN(ctx->base.max_insns, bound);
     }
 }
 
@@ -9308,6 +9305,11 @@ static void ppc_tr_translate_insn(DisasContextBase *dcbase, CPUState *cs)
     handler->count++;
 #endif
 
+    /* End the TB when crossing a page boundary. */
+    if (ctx->base.is_jmp == DISAS_NEXT && !(pc & ~TARGET_PAGE_MASK)) {
+        ctx->base.is_jmp = DISAS_TOO_MANY;
+    }
+
     translator_loop_temp_check(&ctx->base);
 }
 
-- 
2.25.1