TCG variable type checking.

Signed-off-by: Paul Brook <paul@codesourcery.com>


git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@5729 c046a42c-6fe2-441c-8c8c-71466251a162

1 files changed, 221 insertions, 0 deletions

diff --git a/def-helper.h b/def-helper.h
new file mode 100644
index 000000000..98a5f6807
--- /dev/null
+++ b/def-helper.h
@@ -0,0 +1,221 @@
+/* Helper file for declaring TCG helper functions.
+   Should be included at the start and end of target-foo/helper.h.
+
+   Targets should use DEF_HELPER_N and DEF_HELPER_FLAGS_N to declare helper
+   functions.  Names should be specified without the helper_ prefix, and
+   the return and argument types specified.  3 basic types are understood
+   (i32, i64 and ptr).  Additional aliases are provided for convenience and
+   to match the types used by the C helper implementation.
+
+   The target helper.h should be included in all files that use/define
+   helper functions.  THis will ensure that function prototypes are
+   consistent.  In addition it should be included an extra two times for
+   helper.c, defining:
+    GEN_HELPER 1 to produce op generation functions (gen_helper_*)
+    GEN_HELPER 2 to do runtime registration helper functions.
+ */
+
+#ifndef DEF_HELPER_H
+#define DEF_HELPER_H 1
+
+#define HELPER(name) glue(helper_, name)
+
+#define GET_TCGV_i32 GET_TCGV_I32
+#define GET_TCGV_i64 GET_TCGV_I64
+#define GET_TCGV_ptr GET_TCGV_PTR
+
+/* Some types that make sense in C, but not for TCG.  */
+#define dh_alias_i32 i32
+#define dh_alias_s32 i32
+#define dh_alias_int i32
+#define dh_alias_i64 i64
+#define dh_alias_s64 i64
+#define dh_alias_f32 i32
+#define dh_alias_f64 i64
+#if TARGET_LONG_BITS == 32
+#define dh_alias_tl i32
+#else
+#define dh_alias_tl i64
+#endif
+#define dh_alias_ptr ptr
+#define dh_alias_void void
+#define dh_alias_env ptr
+#define dh_alias(t) glue(dh_alias_, t)
+
+#define dh_ctype_i32 uint32_t
+#define dh_ctype_s32 int32_t
+#define dh_ctype_int int
+#define dh_ctype_i64 uint64_t
+#define dh_ctype_s64 int64_t
+#define dh_ctype_f32 float32
+#define dh_ctype_f64 float64
+#define dh_ctype_tl target_ulong
+#define dh_ctype_ptr void *
+#define dh_ctype_void void
+#define dh_ctype_env CPUState *
+#define dh_ctype(t) dh_ctype_##t
+
+/* We can't use glue() here because it falls foul of C preprocessor
+   recursive expansion rules.  */
+#define dh_retvar_decl0_void void
+#define dh_retvar_decl0_i32 TCGv_i32 retval
+#define dh_retvar_decl0_i64 TCGv_i64 retval
+#define dh_retvar_decl0_ptr TCGv_iptr retval
+#define dh_retvar_decl0(t) glue(dh_retvar_decl0_, dh_alias(t))
+
+#define dh_retvar_decl_void
+#define dh_retvar_decl_i32 TCGv_i32 retval,
+#define dh_retvar_decl_i64 TCGv_i64 retval,
+#define dh_retvar_decl_ptr TCGv_iptr retval,
+#define dh_retvar_decl(t) glue(dh_retvar_decl_, dh_alias(t))
+
+#define dh_retvar_void TCG_CALL_DUMMY_ARG
+#define dh_retvar_i32 GET_TCGV_i32(retval)
+#define dh_retvar_i64 GET_TCGV_i64(retval)
+#define dh_retvar_ptr GET_TCGV_ptr(retval)
+#define dh_retvar(t) glue(dh_retvar_, dh_alias(t))
+
+#define dh_is_64bit_void 0
+#define dh_is_64bit_i32 0
+#define dh_is_64bit_i64 1
+#define dh_is_64bit_ptr (TCG_TARGET_REG_BITS == 64)
+#define dh_is_64bit(t) glue(dh_is_64bit_, dh_alias(t))
+
+#define dh_arg(t, n) \
+  args[n - 1] = glue(GET_TCGV_, dh_alias(t))(glue(arg, n)); \
+  sizemask |= dh_is_64bit(t) << n
+
+#define dh_arg_decl(t, n) glue(TCGv_, dh_alias(t)) glue(arg, n)
+
+
+#define DEF_HELPER_0(name, ret) \
+    DEF_HELPER_FLAGS_0(name, 0, ret)
+#define DEF_HELPER_1(name, ret, t1) \
+    DEF_HELPER_FLAGS_1(name, 0, ret, t1)
+#define DEF_HELPER_2(name, ret, t1, t2) \
+    DEF_HELPER_FLAGS_2(name, 0, ret, t1, t2)
+#define DEF_HELPER_3(name, ret, t1, t2, t3) \
+    DEF_HELPER_FLAGS_3(name, 0, ret, t1, t2, t3)
+#define DEF_HELPER_4(name, ret, t1, t2, t3, t4) \
+    DEF_HELPER_FLAGS_4(name, 0, ret, t1, t2, t3, t4)
+
+#endif /* DEF_HELPER_H */
+
+#ifndef GEN_HELPER
+/* Function prototypes.  */
+
+#define DEF_HELPER_FLAGS_0(name, flags, ret) \
+dh_ctype(ret) HELPER(name) (void);
+
+#define DEF_HELPER_FLAGS_1(name, flags, ret, t1) \
+dh_ctype(ret) HELPER(name) (dh_ctype(t1));
+
+#define DEF_HELPER_FLAGS_2(name, flags, ret, t1, t2) \
+dh_ctype(ret) HELPER(name) (dh_ctype(t1), dh_ctype(t2));
+
+#define DEF_HELPER_FLAGS_3(name, flags, ret, t1, t2, t3) \
+dh_ctype(ret) HELPER(name) (dh_ctype(t1), dh_ctype(t2), dh_ctype(t3));
+
+#define DEF_HELPER_FLAGS_4(name, flags, ret, t1, t2, t3, t4) \
+dh_ctype(ret) HELPER(name) (dh_ctype(t1), dh_ctype(t2), dh_ctype(t3), \
+                                   dh_ctype(t4));
+
+#undef GEN_HELPER
+#define GEN_HELPER -1
+
+#elif GEN_HELPER == 1
+/* Gen functions.  */
+
+#define DEF_HELPER_FLAGS_0(name, flags, ret) \
+static inline void glue(gen_helper_, name)(dh_retvar_decl0(ret)) \
+{ \
+  int sizemask; \
+  sizemask = dh_is_64bit(ret); \
+  tcg_gen_helperN(HELPER(name), flags, sizemask, dh_retvar(ret), 0, NULL); \
+}
+
+#define DEF_HELPER_FLAGS_1(name, flags, ret, t1) \
+static inline void glue(gen_helper_, name)(dh_retvar_decl(ret) dh_arg_decl(t1, 1)) \
+{ \
+  TCGArg args[1]; \
+  int sizemask; \
+  sizemask = dh_is_64bit(ret); \
+  dh_arg(t1, 1); \
+  tcg_gen_helperN(HELPER(name), flags, sizemask, dh_retvar(ret), 1, args); \
+}
+
+#define DEF_HELPER_FLAGS_2(name, flags, ret, t1, t2) \
+static inline void glue(gen_helper_, name)(dh_retvar_decl(ret) dh_arg_decl(t1, 1), \
+    dh_arg_decl(t2, 2)) \
+{ \
+  TCGArg args[2]; \
+  int sizemask; \
+  sizemask = dh_is_64bit(ret); \
+  dh_arg(t1, 1); \
+  dh_arg(t2, 2); \
+  tcg_gen_helperN(HELPER(name), flags, sizemask, dh_retvar(ret), 2, args); \
+}
+
+#define DEF_HELPER_FLAGS_3(name, flags, ret, t1, t2, t3) \
+static inline void glue(gen_helper_, name)(dh_retvar_decl(ret) dh_arg_decl(t1, 1), \
+    dh_arg_decl(t2, 2), dh_arg_decl(t3, 3)) \
+{ \
+  TCGArg args[3]; \
+  int sizemask; \
+  sizemask = dh_is_64bit(ret); \
+  dh_arg(t1, 1); \
+  dh_arg(t2, 2); \
+  dh_arg(t3, 3); \
+  tcg_gen_helperN(HELPER(name), flags, sizemask, dh_retvar(ret), 3, args); \
+}
+
+#define DEF_HELPER_FLAGS_4(name, flags, ret, t1, t2, t3, t4) \
+static inline void glue(gen_helper_, name)(dh_retvar_decl(ret) dh_arg_decl(t1, 1), \
+    dh_arg_decl(t2, 2), dh_arg_decl(t3, 3), dh_arg_decl(t4, 4)) \
+{ \
+  TCGArg args[4]; \
+  int sizemask; \
+  sizemask = dh_is_64bit(ret); \
+  dh_arg(t1, 1); \
+  dh_arg(t2, 2); \
+  dh_arg(t3, 3); \
+  dh_arg(t4, 4); \
+  tcg_gen_helperN(HELPER(name), flags, sizemask, dh_retvar(ret), 4, args); \
+}
+
+#undef GEN_HELPER
+#define GEN_HELPER -1
+
+#elif GEN_HELPER == 2
+/* Register helpers.  */
+
+#define DEF_HELPER_FLAGS_0(name, flags, ret) \
+tcg_register_helper(HELPER(name), #name);
+
+#define DEF_HELPER_FLAGS_1(name, flags, ret, t1) \
+DEF_HELPER_FLAGS_0(name, flags, ret)
+
+#define DEF_HELPER_FLAGS_2(name, flags, ret, t1, t2) \
+DEF_HELPER_FLAGS_0(name, flags, ret)
+
+#define DEF_HELPER_FLAGS_3(name, flags, ret, t1, t2, t3) \
+DEF_HELPER_FLAGS_0(name, flags, ret)
+
+#define DEF_HELPER_FLAGS_4(name, flags, ret, t1, t2, t3, t4) \
+DEF_HELPER_FLAGS_0(name, flags, ret)
+
+#undef GEN_HELPER
+#define GEN_HELPER -1
+
+#elif GEN_HELPER == -1
+/* Undefine macros.  */
+
+#undef DEF_HELPER_FLAGS_0
+#undef DEF_HELPER_FLAGS_1
+#undef DEF_HELPER_FLAGS_2
+#undef DEF_HELPER_FLAGS_3
+#undef DEF_HELPER_FLAGS_4
+#undef GEN_HELPER
+
+#endif
+