[PATCH v4 20/57] tcg: Introduce TCG_OPF_TYPE_MASK

[Richard Henderson <richard.henderson@linaro.org>]

Reorg TCG_OPF_64BIT and TCG_OPF_VECTOR into a two-bit field so
that we can add TCG_OPF_128BIT without requiring another bit.

Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
---
 include/tcg/tcg.h            | 22 ++++++++++++----------
 tcg/optimize.c               | 15 ++++++++++++---
 tcg/tcg.c                    |  4 ++--
 tcg/aarch64/tcg-target.c.inc |  8 +++++---
 tcg/tci/tcg-target.c.inc     |  3 ++-
 5 files changed, 33 insertions(+), 19 deletions(-)

diff --git a/include/tcg/tcg.h b/include/tcg/tcg.h
index b19e167e1d..efbd891f87 100644
--- a/include/tcg/tcg.h
+++ b/include/tcg/tcg.h
@@ -932,24 +932,26 @@ typedef struct TCGArgConstraint {
 
 /* Bits for TCGOpDef->flags, 8 bits available, all used.  */
 enum {
+    /* Two bits describing the output type. */
+    TCG_OPF_TYPE_MASK    = 0x03,
+    TCG_OPF_32BIT        = 0x00,
+    TCG_OPF_64BIT        = 0x01,
+    TCG_OPF_VECTOR       = 0x02,
+    TCG_OPF_128BIT       = 0x03,
     /* Instruction exits the translation block.  */
-    TCG_OPF_BB_EXIT      = 0x01,
+    TCG_OPF_BB_EXIT      = 0x04,
     /* Instruction defines the end of a basic block.  */
-    TCG_OPF_BB_END       = 0x02,
+    TCG_OPF_BB_END       = 0x08,
     /* Instruction clobbers call registers and potentially update globals.  */
-    TCG_OPF_CALL_CLOBBER = 0x04,
+    TCG_OPF_CALL_CLOBBER = 0x10,
     /* Instruction has side effects: it cannot be removed if its outputs
        are not used, and might trigger exceptions.  */
-    TCG_OPF_SIDE_EFFECTS = 0x08,
-    /* Instruction operands are 64-bits (otherwise 32-bits).  */
-    TCG_OPF_64BIT        = 0x10,
+    TCG_OPF_SIDE_EFFECTS = 0x20,
     /* Instruction is optional and not implemented by the host, or insn
        is generic and should not be implemened by the host.  */
-    TCG_OPF_NOT_PRESENT  = 0x20,
-    /* Instruction operands are vectors.  */
-    TCG_OPF_VECTOR       = 0x40,
+    TCG_OPF_NOT_PRESENT  = 0x40,
     /* Instruction is a conditional branch. */
-    TCG_OPF_COND_BRANCH  = 0x80
+    TCG_OPF_COND_BRANCH  = 0x80,
 };
 
 typedef struct TCGOpDef {
diff --git a/tcg/optimize.c b/tcg/optimize.c
index 9614fa3638..37d46f2a1f 100644
--- a/tcg/optimize.c
+++ b/tcg/optimize.c
@@ -2051,12 +2051,21 @@ void tcg_optimize(TCGContext *s)
         copy_propagate(&ctx, op, def->nb_oargs, def->nb_iargs);
 
         /* Pre-compute the type of the operation. */
-        if (def->flags & TCG_OPF_VECTOR) {
+        switch (def->flags & TCG_OPF_TYPE_MASK) {
+        case TCG_OPF_VECTOR:
             ctx.type = TCG_TYPE_V64 + TCGOP_VECL(op);
-        } else if (def->flags & TCG_OPF_64BIT) {
+            break;
+        case TCG_OPF_128BIT:
+            ctx.type = TCG_TYPE_I128;
+            break;
+        case TCG_OPF_64BIT:
             ctx.type = TCG_TYPE_I64;
-        } else {
+            break;
+        case TCG_OPF_32BIT:
             ctx.type = TCG_TYPE_I32;
+            break;
+        default:
+            qemu_build_not_reached();
         }
 
         /* Assume all bits affected, no bits known zero, no sign reps. */
diff --git a/tcg/tcg.c b/tcg/tcg.c
index d0afabf194..cb5ca9b612 100644
--- a/tcg/tcg.c
+++ b/tcg/tcg.c
@@ -2294,7 +2294,7 @@ static void tcg_dump_ops(TCGContext *s, FILE *f, bool have_prefs)
             nb_iargs = def->nb_iargs;
             nb_cargs = def->nb_cargs;
 
-            if (def->flags & TCG_OPF_VECTOR) {
+            if ((def->flags & TCG_OPF_TYPE_MASK) == TCG_OPF_VECTOR) {
                 col += ne_fprintf(f, "v%d,e%d,", 64 << TCGOP_VECL(op),
                                   8 << TCGOP_VECE(op));
             }
@@ -4782,7 +4782,7 @@ static void tcg_reg_alloc_op(TCGContext *s, const TCGOp *op)
         tcg_out_extrl_i64_i32(s, new_args[0], new_args[1]);
         break;
     default:
-        if (def->flags & TCG_OPF_VECTOR) {
+        if ((def->flags & TCG_OPF_TYPE_MASK) == TCG_OPF_VECTOR) {
             tcg_out_vec_op(s, op->opc, TCGOP_VECL(op), TCGOP_VECE(op),
                            new_args, const_args);
         } else {
diff --git a/tcg/aarch64/tcg-target.c.inc b/tcg/aarch64/tcg-target.c.inc
index 3adc5fd3a3..43acb4fbcb 100644
--- a/tcg/aarch64/tcg-target.c.inc
+++ b/tcg/aarch64/tcg-target.c.inc
@@ -1921,9 +1921,11 @@ static void tcg_out_op(TCGContext *s, TCGOpcode opc,
                        const TCGArg args[TCG_MAX_OP_ARGS],
                        const int const_args[TCG_MAX_OP_ARGS])
 {
-    /* 99% of the time, we can signal the use of extension registers
-       by looking to see if the opcode handles 64-bit data.  */
-    TCGType ext = (tcg_op_defs[opc].flags & TCG_OPF_64BIT) != 0;
+    /*
+     * 99% of the time, we can signal the use of extension registers
+     * by looking to see if the opcode handles 32-bit data or not.
+     */
+    TCGType ext = (tcg_op_defs[opc].flags & TCG_OPF_TYPE_MASK) != TCG_OPF_32BIT;
 
     /* Hoist the loads of the most common arguments.  */
     TCGArg a0 = args[0];
diff --git a/tcg/tci/tcg-target.c.inc b/tcg/tci/tcg-target.c.inc
index 4cf03a579c..e31640d109 100644
--- a/tcg/tci/tcg-target.c.inc
+++ b/tcg/tci/tcg-target.c.inc
@@ -790,7 +790,8 @@ static void tcg_out_op(TCGContext *s, TCGOpcode opc,
     CASE_32_64(sextract) /* Optional (TCG_TARGET_HAS_sextract_*). */
         {
             TCGArg pos = args[2], len = args[3];
-            TCGArg max = tcg_op_defs[opc].flags & TCG_OPF_64BIT ? 64 : 32;
+            TCGArg max = ((tcg_op_defs[opc].flags & TCG_OPF_TYPE_MASK)
+                          == TCG_OPF_32BIT ? 32 : 64);
 
             tcg_debug_assert(pos < max);
             tcg_debug_assert(pos + len <= max);
-- 
2.34.1