tcg/aarch64: Implement ctpop with FEAT_CSSC

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

tcg/aarch64/tcg-target.c.inc

diff --git a/tcg/aarch64/tcg-target.c.inc b/tcg/aarch64/tcg-target.c.inc
index 55b3be0..1f784e8 100644
--- a/tcg/aarch64/tcg-target.c.inc
+++ b/tcg/aarch64/tcg-target.c.inc
@@ -535,6 +535,7 @@
 
     /* Data-processing (1 source) instructions.  */
     Irr_sf_CLZ         = 0x5ac01000,
+    Irr_sf_CNT         = 0x5ac01c00,
     Irr_sf_RBIT        = 0x5ac00000,
     Irr_sf_REV         = 0x5ac00000, /* + size << 10 */
 
@@ -2251,8 +2252,20 @@
     .out_rri = tgen_clzi,
 };
 
+static TCGConstraintSetIndex cset_ctpop(TCGType type, unsigned flags)
+{
+    return cpuinfo & CPUINFO_CSSC ? C_O1_I1(r, r) : C_NotImplemented;
+}
+
+static void tgen_ctpop(TCGContext *s, TCGType type, TCGReg a0, TCGReg a1)
+{
+    tcg_out_insn(s, rr_sf, CNT, type, a0, a1);
+}
+
 static const TCGOutOpUnary outop_ctpop = {
-    .base.static_constraint = C_NotImplemented,
+    .base.static_constraint = C_Dynamic,
+    .base.dynamic_constraint = cset_ctpop,
+    .out_rr = tgen_ctpop,
 };
 
 static void tgen_ctz(TCGContext *s, TCGType type,