tcg: Combine dh_is_64bit and dh_is_signed to dh_typecode

We will shortly be interested in distinguishing pointers
from integers in the helper's declaration, as well as a
true void return.  We currently have two parallel 1 bit
fields; merge them and expand to a 3 bit field.

Our current maximum is 7 helper arguments, plus the return
makes 8 * 3 = 24 bits used within the uint32_t typemask.

Tested-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>

7 files changed, 67 insertions, 85 deletions

diff --git a/include/exec/helper-head.h b/include/exec/helper-head.h
index 3094c79..b974eb3 100644
--- a/include/exec/helper-head.h
+++ b/include/exec/helper-head.h
@@ -85,32 +85,14 @@
 #define dh_retvar_ptr tcgv_ptr_temp(retval)
 #define dh_retvar(t) glue(dh_retvar_, dh_alias(t))
 
-#define dh_is_64bit_void 0
-#define dh_is_64bit_noreturn 0
-#define dh_is_64bit_i32 0
-#define dh_is_64bit_i64 1
-#define dh_is_64bit_ptr (sizeof(void *) == 8)
-#define dh_is_64bit_cptr dh_is_64bit_ptr
-#define dh_is_64bit(t) glue(dh_is_64bit_, dh_alias(t))
-
-#define dh_is_signed_void 0
-#define dh_is_signed_noreturn 0
-#define dh_is_signed_i32 0
-#define dh_is_signed_s32 1
-#define dh_is_signed_i64 0
-#define dh_is_signed_s64 1
-#define dh_is_signed_f16 0
-#define dh_is_signed_f32 0
-#define dh_is_signed_f64 0
-#define dh_is_signed_tl  0
-#define dh_is_signed_int 1
-/* ??? This is highly specific to the host cpu.  There are even special
-   extension instructions that may be required, e.g. ia64's addp4.  But
-   for now we don't support any 64-bit targets with 32-bit pointers.  */
-#define dh_is_signed_ptr 0
-#define dh_is_signed_cptr dh_is_signed_ptr
-#define dh_is_signed_env dh_is_signed_ptr
-#define dh_is_signed(t) dh_is_signed_##t
+#define dh_typecode_void 0
+#define dh_typecode_noreturn 0
+#define dh_typecode_i32 2
+#define dh_typecode_s32 3
+#define dh_typecode_i64 4
+#define dh_typecode_s64 5
+#define dh_typecode_ptr 6
+#define dh_typecode(t) glue(dh_typecode_, dh_alias(t))
 
 #define dh_callflag_i32  0
 #define dh_callflag_s32  0
@@ -126,8 +108,7 @@
 #define dh_callflag_noreturn TCG_CALL_NO_RETURN
 #define dh_callflag(t) glue(dh_callflag_, dh_alias(t))
 
-#define dh_sizemask(t, n) \
-  ((dh_is_64bit(t) << (n*2)) | (dh_is_signed(t) << (n*2+1)))
+#define dh_typemask(t, n)  (dh_typecode(t) << (n * 3))
 
 #define dh_arg(t, n) \
   glue(glue(tcgv_, dh_alias(t)), _temp)(glue(arg, n))
diff --git a/include/exec/helper-tcg.h b/include/exec/helper-tcg.h
index 6888514..16cd318 100644
--- a/include/exec/helper-tcg.h
+++ b/include/exec/helper-tcg.h
@@ -13,50 +13,50 @@
 #define DEF_HELPER_FLAGS_0(NAME, FLAGS, ret) \
   { .func = HELPER(NAME), .name = str(NAME), \
     .flags = FLAGS | dh_callflag(ret), \
-    .sizemask = dh_sizemask(ret, 0) },
+    .typemask = dh_typemask(ret, 0) },
 
 #define DEF_HELPER_FLAGS_1(NAME, FLAGS, ret, t1) \
   { .func = HELPER(NAME), .name = str(NAME), \
     .flags = FLAGS | dh_callflag(ret), \
-    .sizemask = dh_sizemask(ret, 0) | dh_sizemask(t1, 1) },
+    .typemask = dh_typemask(ret, 0) | dh_typemask(t1, 1) },
 
 #define DEF_HELPER_FLAGS_2(NAME, FLAGS, ret, t1, t2) \
   { .func = HELPER(NAME), .name = str(NAME), \
     .flags = FLAGS | dh_callflag(ret), \
-    .sizemask = dh_sizemask(ret, 0) | dh_sizemask(t1, 1) \
-    | dh_sizemask(t2, 2) },
+    .typemask = dh_typemask(ret, 0) | dh_typemask(t1, 1) \
+    | dh_typemask(t2, 2) },
 
 #define DEF_HELPER_FLAGS_3(NAME, FLAGS, ret, t1, t2, t3) \
   { .func = HELPER(NAME), .name = str(NAME), \
     .flags = FLAGS | dh_callflag(ret), \
-    .sizemask = dh_sizemask(ret, 0) | dh_sizemask(t1, 1) \
-    | dh_sizemask(t2, 2) | dh_sizemask(t3, 3) },
+    .typemask = dh_typemask(ret, 0) | dh_typemask(t1, 1) \
+    | dh_typemask(t2, 2) | dh_typemask(t3, 3) },
 
 #define DEF_HELPER_FLAGS_4(NAME, FLAGS, ret, t1, t2, t3, t4) \
   { .func = HELPER(NAME), .name = str(NAME), \
     .flags = FLAGS | dh_callflag(ret), \
-    .sizemask = dh_sizemask(ret, 0) | dh_sizemask(t1, 1) \
-    | dh_sizemask(t2, 2) | dh_sizemask(t3, 3) | dh_sizemask(t4, 4) },
+    .typemask = dh_typemask(ret, 0) | dh_typemask(t1, 1) \
+    | dh_typemask(t2, 2) | dh_typemask(t3, 3) | dh_typemask(t4, 4) },
 
 #define DEF_HELPER_FLAGS_5(NAME, FLAGS, ret, t1, t2, t3, t4, t5) \
   { .func = HELPER(NAME), .name = str(NAME), \
     .flags = FLAGS | dh_callflag(ret), \
-    .sizemask = dh_sizemask(ret, 0) | dh_sizemask(t1, 1) \
-    | dh_sizemask(t2, 2) | dh_sizemask(t3, 3) | dh_sizemask(t4, 4) \
-    | dh_sizemask(t5, 5) },
+    .typemask = dh_typemask(ret, 0) | dh_typemask(t1, 1) \
+    | dh_typemask(t2, 2) | dh_typemask(t3, 3) | dh_typemask(t4, 4) \
+    | dh_typemask(t5, 5) },
 
 #define DEF_HELPER_FLAGS_6(NAME, FLAGS, ret, t1, t2, t3, t4, t5, t6) \
   { .func = HELPER(NAME), .name = str(NAME), \
     .flags = FLAGS | dh_callflag(ret), \
-    .sizemask = dh_sizemask(ret, 0) | dh_sizemask(t1, 1) \
-    | dh_sizemask(t2, 2) | dh_sizemask(t3, 3) | dh_sizemask(t4, 4) \
-    | dh_sizemask(t5, 5) | dh_sizemask(t6, 6) },
+    .typemask = dh_typemask(ret, 0) | dh_typemask(t1, 1) \
+    | dh_typemask(t2, 2) | dh_typemask(t3, 3) | dh_typemask(t4, 4) \
+    | dh_typemask(t5, 5) | dh_typemask(t6, 6) },
 
 #define DEF_HELPER_FLAGS_7(NAME, FLAGS, ret, t1, t2, t3, t4, t5, t6, t7) \
   { .func = HELPER(NAME), .name = str(NAME), .flags = FLAGS, \
-    .sizemask = dh_sizemask(ret, 0) | dh_sizemask(t1, 1) \
-    | dh_sizemask(t2, 2) | dh_sizemask(t3, 3) | dh_sizemask(t4, 4) \
-    | dh_sizemask(t5, 5) | dh_sizemask(t6, 6) | dh_sizemask(t7, 7) },
+    .typemask = dh_typemask(ret, 0) | dh_typemask(t1, 1) \
+    | dh_typemask(t2, 2) | dh_typemask(t3, 3) | dh_typemask(t4, 4) \
+    | dh_typemask(t5, 5) | dh_typemask(t6, 6) | dh_typemask(t7, 7) },
 
 #include "helper.h"
 #include "trace/generated-helpers.h"
diff --git a/target/hppa/helper.h b/target/hppa/helper.h
index 2d483aa..0a629ff 100644
--- a/target/hppa/helper.h
+++ b/target/hppa/helper.h
@@ -1,12 +1,9 @@
 #if TARGET_REGISTER_BITS == 64
 # define dh_alias_tr     i64
-# define dh_is_64bit_tr  1
 #else
 # define dh_alias_tr     i32
-# define dh_is_64bit_tr  0
 #endif
 #define dh_ctype_tr      target_ureg
-#define dh_is_signed_tr  0
 
 DEF_HELPER_2(excp, noreturn, env, int)
 DEF_HELPER_FLAGS_2(tsv, TCG_CALL_NO_WG, void, env, tr)
diff --git a/target/i386/ops_sse_header.h b/target/i386/ops_sse_header.h
index 6c0c849..e68af5c 100644
--- a/target/i386/ops_sse_header.h
+++ b/target/i386/ops_sse_header.h
@@ -30,9 +30,6 @@
 #define dh_ctype_Reg Reg *
 #define dh_ctype_ZMMReg ZMMReg *
 #define dh_ctype_MMXReg MMXReg *
-#define dh_is_signed_Reg dh_is_signed_ptr
-#define dh_is_signed_ZMMReg dh_is_signed_ptr
-#define dh_is_signed_MMXReg dh_is_signed_ptr
 
 DEF_HELPER_3(glue(psrlw, SUFFIX), void, env, Reg, Reg)
 DEF_HELPER_3(glue(psraw, SUFFIX), void, env, Reg, Reg)
diff --git a/target/m68k/helper.h b/target/m68k/helper.h
index 7780849..9842eea 100644
--- a/target/m68k/helper.h
+++ b/target/m68k/helper.h
@@ -17,7 +17,6 @@ DEF_HELPER_4(cas2l_parallel, void, env, i32, i32, i32)
 
 #define dh_alias_fp ptr
 #define dh_ctype_fp FPReg *
-#define dh_is_signed_fp dh_is_signed_ptr
 
 DEF_HELPER_3(exts32, void, env, fp, s32)
 DEF_HELPER_3(extf32, void, env, fp, f32)
diff --git a/target/ppc/helper.h b/target/ppc/helper.h
index c517b9f..4076aa2 100644
--- a/target/ppc/helper.h
+++ b/target/ppc/helper.h
@@ -109,11 +109,9 @@ DEF_HELPER_FLAGS_1(ftsqrt, TCG_CALL_NO_RWG_SE, i32, i64)
 
 #define dh_alias_avr ptr
 #define dh_ctype_avr ppc_avr_t *
-#define dh_is_signed_avr dh_is_signed_ptr
 
 #define dh_alias_vsr ptr
 #define dh_ctype_vsr ppc_vsr_t *
-#define dh_is_signed_vsr dh_is_signed_ptr
 
 DEF_HELPER_3(vavgub, void, avr, avr, avr)
 DEF_HELPER_3(vavguh, void, avr, avr, avr)
@@ -697,7 +695,6 @@ DEF_HELPER_3(store_601_batu, void, env, i32, tl)
 
 #define dh_alias_fprp ptr
 #define dh_ctype_fprp ppc_fprp_t *
-#define dh_is_signed_fprp dh_is_signed_ptr
 
 DEF_HELPER_4(dadd, void, env, fprp, fprp, fprp)
 DEF_HELPER_4(daddq, void, env, fprp, fprp, fprp)
diff --git a/tcg/tcg.c b/tcg/tcg.c
index ca482c2..3d6e6b2 100644
--- a/tcg/tcg.c
+++ b/tcg/tcg.c
@@ -536,7 +536,7 @@ typedef struct TCGHelperInfo {
     void *func;
     const char *name;
     unsigned flags;
-    unsigned sizemask;
+    unsigned typemask;
 } TCGHelperInfo;
 
 #include "exec/helper-proto.h"
@@ -1395,13 +1395,13 @@ bool tcg_op_supported(TCGOpcode op)
 void tcg_gen_callN(void *func, TCGTemp *ret, int nargs, TCGTemp **args)
 {
     int i, real_args, nb_rets, pi;
-    unsigned sizemask, flags;
+    unsigned typemask, flags;
     TCGHelperInfo *info;
     TCGOp *op;
 
     info = g_hash_table_lookup(helper_table, (gpointer)func);
     flags = info->flags;
-    sizemask = info->sizemask;
+    typemask = info->typemask;
 
 #ifdef CONFIG_PLUGIN
     /* detect non-plugin helpers */
@@ -1414,36 +1414,41 @@ void tcg_gen_callN(void *func, TCGTemp *ret, int nargs, TCGTemp **args)
     && !defined(CONFIG_TCG_INTERPRETER)
     /* We have 64-bit values in one register, but need to pass as two
        separate parameters.  Split them.  */
-    int orig_sizemask = sizemask;
+    int orig_typemask = typemask;
     int orig_nargs = nargs;
     TCGv_i64 retl, reth;
     TCGTemp *split_args[MAX_OPC_PARAM];
 
     retl = NULL;
     reth = NULL;
-    if (sizemask != 0) {
-        for (i = real_args = 0; i < nargs; ++i) {
-            int is_64bit = sizemask & (1 << (i+1)*2);
-            if (is_64bit) {
-                TCGv_i64 orig = temp_tcgv_i64(args[i]);
-                TCGv_i32 h = tcg_temp_new_i32();
-                TCGv_i32 l = tcg_temp_new_i32();
-                tcg_gen_extr_i64_i32(l, h, orig);
-                split_args[real_args++] = tcgv_i32_temp(h);
-                split_args[real_args++] = tcgv_i32_temp(l);
-            } else {
-                split_args[real_args++] = args[i];
-            }
+    typemask = 0;
+    for (i = real_args = 0; i < nargs; ++i) {
+        int argtype = extract32(orig_typemask, (i + 1) * 3, 3);
+        bool is_64bit = (argtype & ~1) == dh_typecode_i64;
+
+        if (is_64bit) {
+            TCGv_i64 orig = temp_tcgv_i64(args[i]);
+            TCGv_i32 h = tcg_temp_new_i32();
+            TCGv_i32 l = tcg_temp_new_i32();
+            tcg_gen_extr_i64_i32(l, h, orig);
+            split_args[real_args++] = tcgv_i32_temp(h);
+            typemask |= dh_typecode_i32 << (real_args * 3);
+            split_args[real_args++] = tcgv_i32_temp(l);
+            typemask |= dh_typecode_i32 << (real_args * 3);
+        } else {
+            split_args[real_args++] = args[i];
+            typemask |= argtype << (real_args * 3);
         }
-        nargs = real_args;
-        args = split_args;
-        sizemask = 0;
     }
+    nargs = real_args;
+    args = split_args;
 #elif defined(TCG_TARGET_EXTEND_ARGS) && TCG_TARGET_REG_BITS == 64
     for (i = 0; i < nargs; ++i) {
-        int is_64bit = sizemask & (1 << (i+1)*2);
-        int is_signed = sizemask & (2 << (i+1)*2);
-        if (!is_64bit) {
+        int argtype = extract32(typemask, (i + 1) * 3, 3);
+        bool is_32bit = (argtype & ~1) == dh_typecode_i32;
+        bool is_signed = argtype & 1;
+
+        if (is_32bit) {
             TCGv_i64 temp = tcg_temp_new_i64();
             TCGv_i64 orig = temp_tcgv_i64(args[i]);
             if (is_signed) {
@@ -1462,7 +1467,7 @@ void tcg_gen_callN(void *func, TCGTemp *ret, int nargs, TCGTemp **args)
     if (ret != NULL) {
 #if defined(__sparc__) && !defined(__arch64__) \
     && !defined(CONFIG_TCG_INTERPRETER)
-        if (orig_sizemask & 1) {
+        if ((typemask & 6) == dh_typecode_i64) {
             /* The 32-bit ABI is going to return the 64-bit value in
                the %o0/%o1 register pair.  Prepare for this by using
                two return temporaries, and reassemble below.  */
@@ -1476,7 +1481,7 @@ void tcg_gen_callN(void *func, TCGTemp *ret, int nargs, TCGTemp **args)
             nb_rets = 1;
         }
 #else
-        if (TCG_TARGET_REG_BITS < 64 && (sizemask & 1)) {
+        if (TCG_TARGET_REG_BITS < 64 && (typemask & 6) == dh_typecode_i64) {
 #ifdef HOST_WORDS_BIGENDIAN
             op->args[pi++] = temp_arg(ret + 1);
             op->args[pi++] = temp_arg(ret);
@@ -1497,7 +1502,9 @@ void tcg_gen_callN(void *func, TCGTemp *ret, int nargs, TCGTemp **args)
 
     real_args = 0;
     for (i = 0; i < nargs; i++) {
-        int is_64bit = sizemask & (1 << (i+1)*2);
+        int argtype = extract32(typemask, (i + 1) * 3, 3);
+        bool is_64bit = (argtype & ~1) == dh_typecode_i64;
+
         if (TCG_TARGET_REG_BITS < 64 && is_64bit) {
 #ifdef TCG_TARGET_CALL_ALIGN_ARGS
             /* some targets want aligned 64 bit args */
@@ -1542,7 +1549,9 @@ void tcg_gen_callN(void *func, TCGTemp *ret, int nargs, TCGTemp **args)
     && !defined(CONFIG_TCG_INTERPRETER)
     /* Free all of the parts we allocated above.  */
     for (i = real_args = 0; i < orig_nargs; ++i) {
-        int is_64bit = orig_sizemask & (1 << (i+1)*2);
+        int argtype = extract32(orig_typemask, (i + 1) * 3, 3);
+        bool is_64bit = (argtype & ~1) == dh_typecode_i64;
+
         if (is_64bit) {
             tcg_temp_free_internal(args[real_args++]);
             tcg_temp_free_internal(args[real_args++]);
@@ -1550,7 +1559,7 @@ void tcg_gen_callN(void *func, TCGTemp *ret, int nargs, TCGTemp **args)
             real_args++;
         }
     }
-    if (orig_sizemask & 1) {
+    if ((orig_typemask & 6) == dh_typecode_i64) {
         /* The 32-bit ABI returned two 32-bit pieces.  Re-assemble them.
            Note that describing these as TCGv_i64 eliminates an unnecessary
            zero-extension that tcg_gen_concat_i32_i64 would create.  */
@@ -1560,8 +1569,10 @@ void tcg_gen_callN(void *func, TCGTemp *ret, int nargs, TCGTemp **args)
     }
 #elif defined(TCG_TARGET_EXTEND_ARGS) && TCG_TARGET_REG_BITS == 64
     for (i = 0; i < nargs; ++i) {
-        int is_64bit = sizemask & (1 << (i+1)*2);
-        if (!is_64bit) {
+        int argtype = extract32(typemask, (i + 1) * 3, 3);
+        bool is_32bit = (argtype & ~1) == dh_typecode_i32;
+
+        if (is_32bit) {
             tcg_temp_free_internal(args[i]);
         }
     }