tcg: Relax requirement for mulu2_i32 on 32-bit hosts

Instead require either mulu2_i32 or muluh_i32.  The code in tcg-op.h
already supports looking for both.  Previous incomplete conversion?

Signed-off-by: Richard Henderson <rth@twiddle.net>

tcg/arm/tcg-target.h

@@ -79,6 +79,7 @@ extern bool use_idiv_instructions;
 #define TCG_TARGET_HAS_nor_i32          0
 #define TCG_TARGET_HAS_deposit_i32      1
 #define TCG_TARGET_HAS_movcond_i32      1
+#define TCG_TARGET_HAS_mulu2_i32        1
 #define TCG_TARGET_HAS_muls2_i32        1
 #define TCG_TARGET_HAS_muluh_i32        0
 #define TCG_TARGET_HAS_mulsh_i32        0

tcg/mips/tcg-target.h

@@ -109,6 +109,7 @@ extern bool use_mips32r2_instructions;
 #define TCG_TARGET_HAS_orc_i32          0
 #define TCG_TARGET_HAS_eqv_i32          0
 #define TCG_TARGET_HAS_nand_i32         0
+#define TCG_TARGET_HAS_mulu2_i32        1
 #define TCG_TARGET_HAS_muls2_i32        1
 #define TCG_TARGET_HAS_muluh_i32        1
 #define TCG_TARGET_HAS_mulsh_i32        1

tcg/ppc/tcg-target.h

@@ -95,6 +95,7 @@ typedef enum {
 #define TCG_TARGET_HAS_nor_i32          1
 #define TCG_TARGET_HAS_deposit_i32      1
 #define TCG_TARGET_HAS_movcond_i32      1
+#define TCG_TARGET_HAS_mulu2_i32        1
 #define TCG_TARGET_HAS_muls2_i32        0
 #define TCG_TARGET_HAS_muluh_i32        0
 #define TCG_TARGET_HAS_mulsh_i32        0

tcg/tcg.h

@@ -97,7 +97,6 @@ typedef uint64_t TCGRegSet;
 /* Turn some undef macros into true macros.  */
 #define TCG_TARGET_HAS_add2_i32         1
 #define TCG_TARGET_HAS_sub2_i32         1
-#define TCG_TARGET_HAS_mulu2_i32        1
 #endif
 
 #ifndef TCG_TARGET_deposit_i32_valid
@@ -121,6 +120,13 @@ typedef uint64_t TCGRegSet;
 #define TCG_TARGET_HAS_rem_i64          0
 #endif
 
+/* For 32-bit targets, some sort of unsigned widening multiply is required.  */
+#if TCG_TARGET_REG_BITS == 32 \
+    && !(defined(TCG_TARGET_HAS_mulu2_i32) \
+         || defined(TCG_TARGET_HAS_muluh_i32))
+# error "Missing unsigned widening multiply"
+#endif
+
 typedef enum TCGOpcode {
 #define DEF(name, oargs, iargs, cargs, flags) INDEX_op_ ## name,
 #include "tcg-opc.h"

tcg/tci/tcg-target.h

@@ -118,6 +118,8 @@
 #define TCG_TARGET_HAS_mulu2_i64        0
 #define TCG_TARGET_HAS_muluh_i64        0
 #define TCG_TARGET_HAS_mulsh_i64        0
+#else
+#define TCG_TARGET_HAS_mulu2_i32        1
 #endif /* TCG_TARGET_REG_BITS == 64 */
 
 #define TCG_TARGET_HAS_new_ldst         0