tcg: ppc64: Fix mask generation for vextractdm

In function do_extractm() the mask is calculated as
dup_const(1 << (element_width - 1)). '1' being signed int
works fine for MO_8,16,32. For MO_64, on PPC64 host
this ends up becoming 0 on compilation. The vextractdm
uses MO_64, and it ends up having mask as 0.

Explicitly use 1ULL instead of signed int 1 like its
used everywhere else.

Resolves: https://gitlab.com/qemu-project/qemu/-/issues/1536
Signed-off-by: Shivaprasad G Bhat <sbhat@linux.ibm.com>
Reviewed-by: Alex Bennée <alex.bennee@linaro.org>
Reviewed-by: Lucas Mateus Castro <lucas.araujo@eldorado.org.br>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Cédric Le Goater <clg@redhat.com>
Message-Id: <168319292809.1159309.5817546227121323288.stgit@ltc-boston1.aus.stglabs.ibm.com>
Signed-off-by: Daniel Henrique Barboza <danielhb413@gmail.com>

target/ppc/translate/vmx-impl.c.inc

@@ -2058,7 +2058,7 @@ static bool trans_VEXPANDQM(DisasContext *ctx, arg_VX_tb *a)
 static bool do_vextractm(DisasContext *ctx, arg_VX_tb *a, unsigned vece)
 {
     const uint64_t elem_width = 8 << vece, elem_count_half = 8 >> vece,
-                   mask = dup_const(vece, 1 << (elem_width - 1));
+                   mask = dup_const(vece, 1ULL << (elem_width - 1));
     uint64_t i, j;
     TCGv_i64 lo, hi, t0, t1;