Patchwork [131/147] target-s390: Implement POPCNT

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Submitter Richard Henderson
Date Sept. 28, 2012, 1:07 a.m.
Message ID <1348794467-28365-1-git-send-email-rth@twiddle.net>
Download mbox | patch
Permalink /patch/187671/
State New
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Richard Henderson - Sept. 28, 2012, 1:07 a.m.
Signed-off-by: Richard Henderson <rth@twiddle.net>
---
 target-s390x/helper.h      |  1 +
 target-s390x/insn-data.def |  3 +++
 target-s390x/int_helper.c  | 12 ++++++++++++
 target-s390x/translate.c   |  6 ++++++
 4 files changed, 22 insertions(+)

Patch

diff --git a/target-s390x/helper.h b/target-s390x/helper.h
index fba3b70..03effd1 100644
--- a/target-s390x/helper.h
+++ b/target-s390x/helper.h
@@ -86,6 +86,7 @@  DEF_HELPER_4(unpk, void, env, i32, i64, i64)
 DEF_HELPER_4(tr, void, env, i32, i64, i64)
 DEF_HELPER_4(cksm, i64, env, i64, i64, i64)
 DEF_HELPER_FLAGS_2(sfpc, TCG_CALL_CONST, void, env, i64)
+DEF_HELPER_FLAGS_1(popcnt, TCG_CALL_PURE|TCG_CALL_CONST, i64, i64)
 
 DEF_HELPER_FLAGS_5(calc_cc, TCG_CALL_PURE|TCG_CALL_CONST,
                    i32, env, i32, i64, i64, i64)
diff --git a/target-s390x/insn-data.def b/target-s390x/insn-data.def
index 0777b55..49e4a44 100644
--- a/target-s390x/insn-data.def
+++ b/target-s390x/insn-data.def
@@ -539,6 +539,9 @@ 
     C(0xe336, PFD,     RXY_b, GIE, 0, 0, 0, 0, 0, 0)
     C(0xc602, PFDRL,   RIL_c, GIE, 0, 0, 0, 0, 0, 0)
 
+/* POPULATION COUNT */
+    C(0xb9e1, POPCNT,  RRE,   PC,  0, r2_o, r1, 0, popcnt, nz64)
+
 /* ROTATE LEFT SINGLE LOGICAL */
     C(0xeb1d, RLL,     RSY_a, Z,   r3_o, sh32, new, r1_32, rll32, 0)
     C(0xeb1c, RLLG,    RSY_a, Z,   r3_o, sh64, r1, 0, rll64, 0)
diff --git a/target-s390x/int_helper.c b/target-s390x/int_helper.c
index 00f764c..3a86fba 100644
--- a/target-s390x/int_helper.c
+++ b/target-s390x/int_helper.c
@@ -191,3 +191,15 @@  uint64_t HELPER(cvd)(int32_t bin)
 
     return dec;
 }
+
+uint64_t HELPER(popcnt)(uint64_t r2)
+{
+    uint64_t ret = 0;
+    int i;
+
+    for (i = 0; i < 64; i += 8) {
+        uint64_t t = ctpop32((r2 >> i) & 0xff);
+        ret |= t << i;
+    }
+    return ret;
+}
diff --git a/target-s390x/translate.c b/target-s390x/translate.c
index dddd822..6c23729 100644
--- a/target-s390x/translate.c
+++ b/target-s390x/translate.c
@@ -2558,6 +2558,12 @@  static ExitStatus op_ori(DisasContext *s, DisasOps *o)
     return NO_EXIT;
 }
 
+static ExitStatus op_popcnt(DisasContext *s, DisasOps *o)
+{
+    gen_helper_popcnt(o->out, o->in2);
+    return NO_EXIT;
+}
+
 #ifndef CONFIG_USER_ONLY
 static ExitStatus op_ptlb(DisasContext *s, DisasOps *o)
 {