accel/tcg: Un-inline translator_is_same_page()

Remove the single target-specific definition used in
"exec/translator.h" (TARGET_PAGE_MASK) by un-inlining
is_same_page().
Rename the method as translator_is_same_page() and
improve its documentation.
Use it in translator_use_goto_tb().

Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <20241218154145.71353-1-philmd@linaro.org>

accel/tcg/translator.c

@@ -104,6 +104,11 @@ static void gen_tb_end(const TranslationBlock *tb, uint32_t cflags,
     }
 }
 
+bool translator_is_same_page(const DisasContextBase *db, vaddr addr)
+{
+    return ((addr ^ db->pc_first) & TARGET_PAGE_MASK) == 0;
+}
+
 bool translator_use_goto_tb(DisasContextBase *db, vaddr dest)
 {
     /* Suppress goto_tb if requested. */
@@ -112,7 +117,7 @@ bool translator_use_goto_tb(DisasContextBase *db, vaddr dest)
     }
 
     /* Check for the dest on the same page as the start of the TB.  */
-    return ((db->pc_first ^ dest) & TARGET_PAGE_MASK) == 0;
+    return translator_is_same_page(db, dest);
 }
 
 void translator_loop(CPUState *cpu, TranslationBlock *tb, int *max_insns,

include/exec/translator.h

@@ -267,16 +267,15 @@ bool translator_st(const DisasContextBase *db, void *dest,
  */
 size_t translator_st_len(const DisasContextBase *db);
 
-#ifdef COMPILING_PER_TARGET
+/**
-/*
+ * translator_is_same_page
- * Return whether addr is on the same page as where disassembly started.
+ * @db: disassembly context
+ * @addr: virtual address within TB
+ *
+ * Return whether @addr is on the same page as where disassembly started.
  * Translators can use this to enforce the rule that only single-insn
  * translation blocks are allowed to cross page boundaries.
  */
-static inline bool is_same_page(const DisasContextBase *db, vaddr addr)
+bool translator_is_same_page(const DisasContextBase *db, vaddr addr);
-{
-    return ((addr ^ db->pc_first) & TARGET_PAGE_MASK) == 0;
-}
-#endif
 
 #endif /* EXEC__TRANSLATOR_H */

target/i386/tcg/translate.c

@@ -1512,7 +1512,7 @@ static uint64_t advance_pc(CPUX86State *env, DisasContext *s, int num_bytes)
 
     /* This is a subsequent insn that crosses a page boundary.  */
     if (s->base.num_insns > 1 &&
-        !is_same_page(&s->base, s->pc + num_bytes - 1)) {
+        !translator_is_same_page(&s->base, s->pc + num_bytes - 1)) {
         siglongjmp(s->jmpbuf, 2);
     }
 
@@ -2226,7 +2226,7 @@ static void gen_jmp_rel(DisasContext *s, MemOp ot, int diff, int tb_num)
          * no extra masking to apply (data16 branch in code32, see above),
          * then we have also proven that the addition does not wrap.
          */
-        if (!use_goto_tb || !is_same_page(&s->base, new_pc)) {
+        if (!use_goto_tb || !translator_is_same_page(&s->base, new_pc)) {
             tcg_gen_andi_tl(cpu_eip, cpu_eip, mask);
             use_goto_tb = false;
         }
@@ -3763,7 +3763,7 @@ static void i386_tr_translate_insn(DisasContextBase *dcbase, CPUState *cpu)
              * chance to happen.
              */
             dc->base.is_jmp = DISAS_EOB_NEXT;
-        } else if (!is_same_page(&dc->base, dc->base.pc_next)) {
+        } else if (!translator_is_same_page(&dc->base, dc->base.pc_next)) {
             dc->base.is_jmp = DISAS_TOO_MANY;
         }
     }

target/riscv/translate.c

@@ -1305,7 +1305,7 @@ static void riscv_tr_translate_insn(DisasContextBase *dcbase, CPUState *cpu)
 
     /* Only the first insn within a TB is allowed to cross a page boundary. */
     if (ctx->base.is_jmp == DISAS_NEXT) {
-        if (ctx->itrigger || !is_same_page(&ctx->base, ctx->base.pc_next)) {
+        if (ctx->itrigger || !translator_is_same_page(&ctx->base, ctx->base.pc_next)) {
             ctx->base.is_jmp = DISAS_TOO_MANY;
         } else {
             unsigned page_ofs = ctx->base.pc_next & ~TARGET_PAGE_MASK;
@@ -1315,7 +1315,7 @@ static void riscv_tr_translate_insn(DisasContextBase *dcbase, CPUState *cpu)
                     translator_lduw(env, &ctx->base, ctx->base.pc_next);
                 int len = insn_len(next_insn);
 
-                if (!is_same_page(&ctx->base, ctx->base.pc_next + len - 1)) {
+                if (!translator_is_same_page(&ctx->base, ctx->base.pc_next + len - 1)) {
                     ctx->base.is_jmp = DISAS_TOO_MANY;
                 }
             }

target/s390x/tcg/translate.c

@@ -6423,8 +6423,8 @@ static void s390x_tr_translate_insn(DisasContextBase *dcbase, CPUState *cs)
     dc->base.is_jmp = translate_one(env, dc);
     if (dc->base.is_jmp == DISAS_NEXT) {
         if (dc->ex_value ||
-            !is_same_page(dcbase, dc->base.pc_next) ||
+            !translator_is_same_page(dcbase, dc->base.pc_next) ||
-            !is_same_page(dcbase, get_next_pc(env, dc, dc->base.pc_next))) {
+            !translator_is_same_page(dcbase, get_next_pc(env, dc, dc->base.pc_next))) {
             dc->base.is_jmp = DISAS_TOO_MANY;
         }
     }