tcg/mips: Split out tcg_out_movi_one

Emit all constants that can be loaded in exactly one insn.

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

tcg/mips/tcg-target.c.inc

@@ -510,20 +510,34 @@ static bool tcg_out_mov(TCGContext *s, TCGType type, TCGReg ret, TCGReg arg)
     return true;
 }
 
-static void tcg_out_movi(TCGContext *s, TCGType type,
-                         TCGReg ret, tcg_target_long arg)
+static bool tcg_out_movi_one(TCGContext *s, TCGReg ret, tcg_target_long arg)
 {
-    if (TCG_TARGET_REG_BITS == 64 && type == TCG_TYPE_I32) {
-        arg = (int32_t)arg;
-    }
     if (arg == (int16_t)arg) {
         tcg_out_opc_imm(s, OPC_ADDIU, ret, TCG_REG_ZERO, arg);
-        return;
+        return true;
     }
     if (arg == (uint16_t)arg) {
         tcg_out_opc_imm(s, OPC_ORI, ret, TCG_REG_ZERO, arg);
+        return true;
+    }
+    if (arg == (int32_t)arg && (arg & 0xffff) == 0) {
+        tcg_out_opc_imm(s, OPC_LUI, ret, TCG_REG_ZERO, arg >> 16);
+        return true;
+    }
+    return false;
+}
+
+static void tcg_out_movi(TCGContext *s, TCGType type,
+                         TCGReg ret, tcg_target_long arg)
+{
+    if (TCG_TARGET_REG_BITS == 64 && type == TCG_TYPE_I32) {
+        arg = (int32_t)arg;
+    }
+
+    if (tcg_out_movi_one(s, ret, arg)) {
         return;
     }
+
     if (TCG_TARGET_REG_BITS == 32 || arg == (int32_t)arg) {
         tcg_out_opc_imm(s, OPC_LUI, ret, TCG_REG_ZERO, arg >> 16);
     } else {