[Qemu-devel] [PATCH 077/126] target-s390: Convert LOAD ZERO

[Richard Henderson <rth@twiddle.net>]

Signed-off-by: Richard Henderson <rth@twiddle.net>
---
 target-s390x/fpu_helper.c  | 22 ----------------------
 target-s390x/helper.h      |  3 ---
 target-s390x/insn-data.def |  4 ++++
 target-s390x/translate.c   | 29 ++++++++++++++---------------
 4 files changed, 18 insertions(+), 40 deletions(-)

diff --git a/target-s390x/fpu_helper.c b/target-s390x/fpu_helper.c
index 7d08aae..4844f1e 100644
--- a/target-s390x/fpu_helper.c
+++ b/target-s390x/fpu_helper.c
@@ -495,28 +495,6 @@ uint32_t HELPER(cfxbr)(CPUS390XState *env, uint32_t r1, uint32_t f2,
     return set_cc_nz_f128(v2.q);
 }
 
-/* load 32-bit FP zero */
-void HELPER(lzer)(CPUS390XState *env, uint32_t f1)
-{
-    env->fregs[f1].l.upper = float32_zero;
-}
-
-/* load 64-bit FP zero */
-void HELPER(lzdr)(CPUS390XState *env, uint32_t f1)
-{
-    env->fregs[f1].d = float64_zero;
-}
-
-/* load 128-bit FP zero */
-void HELPER(lzxr)(CPUS390XState *env, uint32_t f1)
-{
-    CPU_QuadU x;
-
-    x.q = float64_to_float128(float64_zero, &env->fpu_status);
-    env->fregs[f1].ll = x.ll.upper;
-    env->fregs[f1 + 1].ll = x.ll.lower;
-}
-
 /* 32-bit FP multiply and add */
 uint64_t HELPER(maeb)(CPUS390XState *env, uint64_t f1,
                       uint64_t f2, uint64_t f3)
diff --git a/target-s390x/helper.h b/target-s390x/helper.h
index a7dcee9..348f4cd 100644
--- a/target-s390x/helper.h
+++ b/target-s390x/helper.h
@@ -73,9 +73,6 @@ DEF_HELPER_FLAGS_5(cxb, TCG_CALL_PURE, i32, env, i64, i64, i64, i64)
 DEF_HELPER_4(cgebr, i32, env, i32, i32, i32)
 DEF_HELPER_4(cgdbr, i32, env, i32, i32, i32)
 DEF_HELPER_4(cgxbr, i32, env, i32, i32, i32)
-DEF_HELPER_2(lzer, void, env, i32)
-DEF_HELPER_2(lzdr, void, env, i32)
-DEF_HELPER_2(lzxr, void, env, i32)
 DEF_HELPER_4(cfebr, i32, env, i32, i32, i32)
 DEF_HELPER_4(cfdbr, i32, env, i32, i32, i32)
 DEF_HELPER_4(cfxbr, i32, env, i32, i32, i32)
diff --git a/target-s390x/insn-data.def b/target-s390x/insn-data.def
index 97c38f2..912c1fa 100644
--- a/target-s390x/insn-data.def
+++ b/target-s390x/insn-data.def
@@ -329,6 +329,10 @@
     C(0xe31f, LRVH,    RXY_a, Z,   0, m2_16u, new, r1_16, rev16, 0)
     C(0xe31e, LRV,     RXY_a, Z,   0, m2_32u, new, r1_32, rev32, 0)
     C(0xe30f, LRVG,    RXY_a, Z,   0, m2_64, r1, 0, rev64, 0)
+/* LOAD ZERO */
+    C(0xb374, LZER,    RRE,   Z,   0, 0, 0, e1, zero, 0)
+    C(0xb375, LZDR,    RRE,   Z,   0, 0, 0, f1, zero, 0)
+    C(0xb376, LZXR,    RRE,   Z,   0, 0, 0, x1, zero2, 0)
 
 /* LOAD LENGTHENED */
     C(0xb304, LDEBR,   RRE,   Z,   0, e2, f1, 0, ldeb, 0)
diff --git a/target-s390x/translate.c b/target-s390x/translate.c
index 86b222a..3c69079 100644
--- a/target-s390x/translate.c
+++ b/target-s390x/translate.c
@@ -1381,21 +1381,6 @@ static void disas_b3(DisasContext *s, int op, int m3, int r1, int r2)
     tcg_temp_free_i32(tmp32_2);
 
     switch (op) {
-    case 0x74: /* LZER        R1                [RRE] */
-        tmp32_1 = tcg_const_i32(r1);
-        gen_helper_lzer(cpu_env, tmp32_1);
-        tcg_temp_free_i32(tmp32_1);
-        break;
-    case 0x75: /* LZDR        R1                [RRE] */
-        tmp32_1 = tcg_const_i32(r1);
-        gen_helper_lzdr(cpu_env, tmp32_1);
-        tcg_temp_free_i32(tmp32_1);
-        break;
-    case 0x76: /* LZXR        R1                [RRE] */
-        tmp32_1 = tcg_const_i32(r1);
-        gen_helper_lzxr(cpu_env, tmp32_1);
-        tcg_temp_free_i32(tmp32_1);
-        break;
     case 0x84: /* SFPC        R1                [RRE] */
         tmp32_1 = load_reg32(r1);
         tcg_gen_st_i32(tmp32_1, cpu_env, offsetof(CPUS390XState, fpc));
@@ -3232,6 +3217,20 @@ static ExitStatus op_xori(DisasContext *s, DisasOps *o)
     return NO_EXIT;
 }
 
+static ExitStatus op_zero(DisasContext *s, DisasOps *o)
+{
+    o->out = tcg_const_i64(0);
+    return NO_EXIT;
+}
+
+static ExitStatus op_zero2(DisasContext *s, DisasOps *o)
+{
+    o->out = tcg_const_i64(0);
+    o->out2 = o->out;
+    o->g_out2 = true;
+    return NO_EXIT;
+}
+
 /* ====================================================================== */
 /* The "Cc OUTput" generators.  Given the generated output (and in some cases
    the original inputs), update the various cc data structures in order to
-- 
1.7.11.4