target/ppc: Introduce REQUIRE_FPU

Signed-off-by: Fernando Valle <fernando.valle@eldorado.org.br>
Signed-off-by: Luis Pires <luis.pires@eldorado.org.br>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <20211029192417.400707-4-luis.pires@eldorado.org.br>
Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>

target/ppc/translate.c

@@ -7349,6 +7349,14 @@ static int times_16(DisasContext *ctx, int x)
         }                                               \
     } while (0)
 
+#define REQUIRE_FPU(ctx)                                \
+    do {                                                \
+        if (unlikely(!(ctx)->fpu_enabled)) {            \
+            gen_exception((ctx), POWERPC_EXCP_FPU);     \
+            return true;                                \
+        }                                               \
+    } while (0)
+
 /*
  * Helpers for implementing sets of trans_* functions.
  * Defer the implementation of NAME to FUNC, with optional extra arguments.