[v2,24/29] target/s390x: implement PACK UNICODE

Commit Message

Aurelien Jarno May 29, 2017, 7:24 p.m. UTC

Use a common helper with PACK ASCII as the differences are limited to
the stride of the source operand.

Signed-off-by: Aurelien Jarno <[e-mail]>
---
 target/s390x/helper.h      |  1 +
 target/s390x/insn-data.def |  2 ++
 target/s390x/mem_helper.c  | 30 +++++++++++++++++++++---------
 target/s390x/translate.c   | 16 ++++++++++++++++
 4 files changed, 40 insertions(+), 9 deletions(-)

Comments

Richard Henderson May 30, 2017, 8:16 p.m. UTC | #1

On 05/29/2017 12:24 PM, Aurelien Jarno wrote:
> Use a common helper with PACK ASCII as the differences are limited to
> the stride of the source operand.
> 
> Signed-off-by: Aurelien Jarno<[e-mail]>
> ---
>   target/s390x/helper.h      |  1 +
>   target/s390x/insn-data.def |  2 ++
>   target/s390x/mem_helper.c  | 30 +++++++++++++++++++++---------
>   target/s390x/translate.c   | 16 ++++++++++++++++
>   4 files changed, 40 insertions(+), 9 deletions(-)

Reviewed-by: Richard Henderson <[e-mail]>


r~

Patch

diff --git a/target/s390x/helper.h b/target/s390x/helper.h
index 9d6b59d3cc..6e167d9643 100644
--- a/target/s390x/helper.h
+++ b/target/s390x/helper.h
@@ -84,6 +84,7 @@  DEF_HELPER_FLAGS_3(sqxb, TCG_CALL_NO_WG, i64, env, i64, i64)
 DEF_HELPER_FLAGS_1(cvd, TCG_CALL_NO_RWG_SE, i64, s32)
 DEF_HELPER_FLAGS_4(pack, TCG_CALL_NO_WG, void, env, i32, i64, i64)
 DEF_HELPER_FLAGS_4(pka, TCG_CALL_NO_WG, void, env, i64, i64, i32)
+DEF_HELPER_FLAGS_4(pku, TCG_CALL_NO_WG, void, env, i64, i64, i32)
 DEF_HELPER_FLAGS_4(unpk, TCG_CALL_NO_WG, void, env, i32, i64, i64)
 DEF_HELPER_FLAGS_4(tr, TCG_CALL_NO_WG, void, env, i32, i64, i64)
 DEF_HELPER_4(tre, i64, env, i64, i64, i64)
diff --git a/target/s390x/insn-data.def b/target/s390x/insn-data.def
index 41431affe6..16f788c86a 100644
--- a/target/s390x/insn-data.def
+++ b/target/s390x/insn-data.def
@@ -669,6 +669,8 @@ 
     C(0xf200, PACK,    SS_a,  Z,   la1, a2, 0, 0, pack, 0)
 /* PACK ASCII */
     C(0xe900, PKA,     SS_f,  E2,  la1, a2, 0, 0, pka, 0)
+/* PACK UNICODE */
+    C(0xe100, PKU,     SS_f,  E2,  la1, a2, 0, 0, pku, 0)
 
 /* PREFETCH */
     /* Implemented as nops of course.  */
diff --git a/target/s390x/mem_helper.c b/target/s390x/mem_helper.c
index 01d6734860..4044dc4eb0 100644
--- a/target/s390x/mem_helper.c
+++ b/target/s390x/mem_helper.c
@@ -914,10 +914,9 @@  void HELPER(pack)(CPUS390XState *env, uint32_t len, uint64_t dest, uint64_t src)
     }
 }
 
-void HELPER(pka)(CPUS390XState *env, uint64_t dest, uint64_t src,
-                 uint32_t srclen)
+static inline void do_pkau(CPUS390XState *env, uint64_t dest, uint64_t src,
+                           uint32_t srclen, int ssize, uintptr_t ra)
 {
-    uintptr_t ra = GETPC();
     int i;
     /* The destination operand is always 16 bytes long.  */
     const int destlen = 16;
@@ -932,16 +931,16 @@  void HELPER(pka)(CPUS390XState *env, uint64_t dest, uint64_t src,
         /* Start with a positive sign */
         if (i == 0) {
             b = 0xc;
-        } else if (srclen > 1) {
+        } else if (srclen > ssize) {
             b = cpu_ldub_data_ra(env, src, ra) & 0x0f;
-            src--;
-            srclen--;
+            src -= ssize;
+            srclen -= ssize;
         }
 
-        if (srclen > 1) {
+        if (srclen > ssize) {
             b |= cpu_ldub_data_ra(env, src, ra) << 4;
-            src--;
-            srclen--;
+            src -= ssize;
+            srclen -= ssize;
         }
 
         cpu_stb_data_ra(env, dest, b, ra);
@@ -949,6 +948,19 @@  void HELPER(pka)(CPUS390XState *env, uint64_t dest, uint64_t src,
     }
 }
 
+
+void HELPER(pka)(CPUS390XState *env, uint64_t dest, uint64_t src,
+                 uint32_t srclen)
+{
+    do_pkau(env, dest, src, srclen, 1, GETPC());
+}
+
+void HELPER(pku)(CPUS390XState *env, uint64_t dest, uint64_t src,
+                 uint32_t srclen)
+{
+    do_pkau(env, dest, src, srclen, 2, GETPC());
+}
+
 void HELPER(unpk)(CPUS390XState *env, uint32_t len, uint64_t dest,
                   uint64_t src)
 {
diff --git a/target/s390x/translate.c b/target/s390x/translate.c
index 5093995f9a..d8b0515f17 100644
--- a/target/s390x/translate.c
+++ b/target/s390x/translate.c
@@ -3317,6 +3317,22 @@  static ExitStatus op_pka(DisasContext *s, DisasOps *o)
     return NO_EXIT;
 }
 
+static ExitStatus op_pku(DisasContext *s, DisasOps *o)
+{
+    int l2 = get_field(s->fields, l2) + 1;
+    TCGv_i32 l;
+
+    /* The length must be even and should not exceed 64 bytes.  */
+    if ((l2 & 1) || (l2 > 64)) {
+        gen_program_exception(s, PGM_SPECIFICATION);
+        return EXIT_NORETURN;
+    }
+    l = tcg_const_i32(l2);
+    gen_helper_pku(cpu_env, o->addr1, o->in2, l);
+    tcg_temp_free_i32(l);
+    return NO_EXIT;
+}
+
 static ExitStatus op_popcnt(DisasContext *s, DisasOps *o)
 {
     gen_helper_popcnt(o->out, o->in2);