tcg: add vaddr type for helpers

Defined as an alias of i32/i64 depending on host pointer size.

Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Pierrick Bouvier <pierrick.bouvier@linaro.org>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Message-id: 20250512180502.2395029-13-pierrick.bouvier@linaro.org
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>

4 files changed, 31 insertions, 0 deletions

diff --git a/include/exec/helper-head.h.inc b/include/exec/helper-head.h.inc
index bce5db06ef..5b248fd713 100644
--- a/include/exec/helper-head.h.inc
+++ b/include/exec/helper-head.h.inc
@@ -58,6 +58,17 @@
 # define dh_ctype_tl target_ulong
 #endif /* COMPILING_PER_TARGET */
 
+#if __SIZEOF_POINTER__ == 4
+# define dh_alias_vaddr i32
+# define dh_typecode_vaddr dh_typecode_i32
+#elif __SIZEOF_POINTER__ == 8
+# define dh_alias_vaddr i64
+# define dh_typecode_vaddr dh_typecode_i64
+#else
+# error "sizeof pointer is different from {4,8}"
+#endif /* __SIZEOF_POINTER__ */
+# define dh_ctype_vaddr uintptr_t
+
 /* We can't use glue() here because it falls foul of C preprocessor
    recursive expansion rules.  */
 #define dh_retvar_decl0_void void
diff --git a/include/tcg/tcg-op-common.h b/include/tcg/tcg-op-common.h
index b439bdb385..e1071adebf 100644
--- a/include/tcg/tcg-op-common.h
+++ b/include/tcg/tcg-op-common.h
@@ -14,6 +14,7 @@
 
 TCGv_i32 tcg_constant_i32(int32_t val);
 TCGv_i64 tcg_constant_i64(int64_t val);
+TCGv_vaddr tcg_constant_vaddr(uintptr_t val);
 TCGv_vec tcg_constant_vec(TCGType type, unsigned vece, int64_t val);
 TCGv_vec tcg_constant_vec_matching(TCGv_vec match, unsigned vece, int64_t val);
 
diff --git a/include/tcg/tcg.h b/include/tcg/tcg.h
index a8c00c72cc..3fa5a7aed2 100644
--- a/include/tcg/tcg.h
+++ b/include/tcg/tcg.h
@@ -189,6 +189,7 @@ typedef tcg_target_ulong TCGArg;
     * TCGv_i64  : 64 bit integer type
     * TCGv_i128 : 128 bit integer type
     * TCGv_ptr  : a host pointer type
+    * TCGv_vaddr: an integer type wide enough to hold a target pointer type
     * TCGv_vec  : a host vector type; the exact size is not exposed
                   to the CPU front-end code.
     * TCGv      : an integer type the same size as target_ulong
@@ -217,6 +218,14 @@ typedef struct TCGv_ptr_d *TCGv_ptr;
 typedef struct TCGv_vec_d *TCGv_vec;
 typedef TCGv_ptr TCGv_env;
 
+#if __SIZEOF_POINTER__ == 4
+typedef TCGv_i32 TCGv_vaddr;
+#elif __SIZEOF_POINTER__ == 8
+typedef TCGv_i64 TCGv_vaddr;
+#else
+# error "sizeof pointer is different from {4,8}"
+#endif /* __SIZEOF_POINTER__ */
+
 /* call flags */
 /* Helper does not read globals (either directly or through an exception). It
    implies TCG_CALL_NO_WRITE_GLOBALS. */
@@ -577,6 +586,11 @@ static inline TCGv_ptr temp_tcgv_ptr(TCGTemp *t)
     return (TCGv_ptr)temp_tcgv_i32(t);
 }
 
+static inline TCGv_vaddr temp_tcgv_vaddr(TCGTemp *t)
+{
+    return (TCGv_vaddr)temp_tcgv_i32(t);
+}
+
 static inline TCGv_vec temp_tcgv_vec(TCGTemp *t)
 {
     return (TCGv_vec)temp_tcgv_i32(t);
diff --git a/tcg/tcg.c b/tcg/tcg.c
index 648333a9fb..ae27a2607d 100644
--- a/tcg/tcg.c
+++ b/tcg/tcg.c
@@ -2367,6 +2367,11 @@ TCGv_i64 tcg_constant_i64(int64_t val)
     return temp_tcgv_i64(tcg_constant_internal(TCG_TYPE_I64, val));
 }
 
+TCGv_vaddr tcg_constant_vaddr(uintptr_t val)
+{
+    return temp_tcgv_vaddr(tcg_constant_internal(TCG_TYPE_PTR, val));
+}
+
 TCGv_ptr tcg_constant_ptr_int(intptr_t val)
 {
     return temp_tcgv_ptr(tcg_constant_internal(TCG_TYPE_PTR, val));