tcg: Add temp allocation for TCGv_i128

This enables allocation of i128.  The type is not yet
usable, as we have not yet added data movement ops.

Reviewed-by: Alex Bennée <alex.bennee@linaro.org>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>

1 files changed, 42 insertions, 18 deletions

diff --git a/tcg/tcg.c b/tcg/tcg.c
index 163913c..a4a3da6 100644
--- a/tcg/tcg.c
+++ b/tcg/tcg.c
@@ -1273,26 +1273,45 @@ TCGTemp *tcg_temp_new_internal(TCGType type, bool temp_local)
         tcg_debug_assert(ts->base_type == type);
         tcg_debug_assert(ts->kind == kind);
     } else {
-        ts = tcg_temp_alloc(s);
-        if (TCG_TARGET_REG_BITS == 32 && type == TCG_TYPE_I64) {
-            TCGTemp *ts2 = tcg_temp_alloc(s);
+        int i, n;
 
-            ts->base_type = type;
-            ts->type = TCG_TYPE_I32;
-            ts->temp_allocated = 1;
-            ts->kind = kind;
+        switch (type) {
+        case TCG_TYPE_I32:
+        case TCG_TYPE_V64:
+        case TCG_TYPE_V128:
+        case TCG_TYPE_V256:
+            n = 1;
+            break;
+        case TCG_TYPE_I64:
+            n = 64 / TCG_TARGET_REG_BITS;
+            break;
+        case TCG_TYPE_I128:
+            n = 128 / TCG_TARGET_REG_BITS;
+            break;
+        default:
+            g_assert_not_reached();
+        }
 
-            tcg_debug_assert(ts2 == ts + 1);
-            ts2->base_type = TCG_TYPE_I64;
-            ts2->type = TCG_TYPE_I32;
-            ts2->temp_allocated = 1;
-            ts2->temp_subindex = 1;
-            ts2->kind = kind;
-        } else {
-            ts->base_type = type;
+        ts = tcg_temp_alloc(s);
+        ts->base_type = type;
+        ts->temp_allocated = 1;
+        ts->kind = kind;
+
+        if (n == 1) {
             ts->type = type;
-            ts->temp_allocated = 1;
-            ts->kind = kind;
+        } else {
+            ts->type = TCG_TYPE_REG;
+
+            for (i = 1; i < n; ++i) {
+                TCGTemp *ts2 = tcg_temp_alloc(s);
+
+                tcg_debug_assert(ts2 == ts + i);
+                ts2->base_type = type;
+                ts2->type = TCG_TYPE_REG;
+                ts2->temp_allocated = 1;
+                ts2->temp_subindex = i;
+                ts2->kind = kind;
+            }
         }
     }
 
@@ -3384,9 +3403,14 @@ static void temp_allocate_frame(TCGContext *s, TCGTemp *ts)
     case TCG_TYPE_V64:
         align = 8;
         break;
+    case TCG_TYPE_I128:
     case TCG_TYPE_V128:
     case TCG_TYPE_V256:
-        /* Note that we do not require aligned storage for V256. */
+        /*
+         * Note that we do not require aligned storage for V256,
+         * and that we provide alignment for I128 to match V128,
+         * even if that's above what the host ABI requires.
+         */
         align = 16;
         break;
     default: