[PULL 17/37] s390x/tcg: Implement 32/128 bit for VECTOR FP COMPARE (AND SIGNAL) SCALAR

[Cornelia Huck <cohuck@redhat.com>]

From: David Hildenbrand <david@redhat.com>

Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: David Hildenbrand <david@redhat.com>
Message-Id: <20210608092337.12221-17-david@redhat.com>
Signed-off-by: Cornelia Huck <cohuck@redhat.com>
---
 target/s390x/helper.h           |  4 +++
 target/s390x/translate_vx.c.inc | 38 ++++++++++++++++++++++------
 target/s390x/vec_fpu_helper.c   | 44 ++++++++++++++++++++++++++++++++-
 3 files changed, 77 insertions(+), 9 deletions(-)

diff --git a/target/s390x/helper.h b/target/s390x/helper.h
index 146836126c4c..dca436f710cd 100644
--- a/target/s390x/helper.h
+++ b/target/s390x/helper.h
@@ -250,8 +250,12 @@ DEF_HELPER_6(gvec_vstrc_cc_rt32, void, ptr, cptr, cptr, cptr, env, i32)
 DEF_HELPER_FLAGS_5(gvec_vfa32, TCG_CALL_NO_WG, void, ptr, cptr, cptr, env, i32)
 DEF_HELPER_FLAGS_5(gvec_vfa64, TCG_CALL_NO_WG, void, ptr, cptr, cptr, env, i32)
 DEF_HELPER_FLAGS_5(gvec_vfa128, TCG_CALL_NO_WG, void, ptr, cptr, cptr, env, i32)
+DEF_HELPER_4(gvec_wfc32, void, cptr, cptr, env, i32)
+DEF_HELPER_4(gvec_wfk32, void, cptr, cptr, env, i32)
 DEF_HELPER_4(gvec_wfc64, void, cptr, cptr, env, i32)
 DEF_HELPER_4(gvec_wfk64, void, cptr, cptr, env, i32)
+DEF_HELPER_4(gvec_wfc128, void, cptr, cptr, env, i32)
+DEF_HELPER_4(gvec_wfk128, void, cptr, cptr, env, i32)
 DEF_HELPER_FLAGS_5(gvec_vfce32, TCG_CALL_NO_WG, void, ptr, cptr, cptr, env, i32)
 DEF_HELPER_5(gvec_vfce32_cc, void, ptr, cptr, cptr, env, i32)
 DEF_HELPER_FLAGS_5(gvec_vfce64, TCG_CALL_NO_WG, void, ptr, cptr, cptr, env, i32)
diff --git a/target/s390x/translate_vx.c.inc b/target/s390x/translate_vx.c.inc
index 6f6ef6b6b84d..822a9d05134b 100644
--- a/target/s390x/translate_vx.c.inc
+++ b/target/s390x/translate_vx.c.inc
@@ -2598,19 +2598,41 @@ static DisasJumpType op_wfc(DisasContext *s, DisasOps *o)
 {
     const uint8_t fpf = get_field(s, m3);
     const uint8_t m4 = get_field(s, m4);
+    gen_helper_gvec_2_ptr *fn = NULL;
 
-    if (fpf != FPF_LONG || m4) {
+    switch (fpf) {
+    case FPF_SHORT:
+        if (s390_has_feat(S390_FEAT_VECTOR_ENH)) {
+            fn = gen_helper_gvec_wfk32;
+            if (s->fields.op2 == 0xcb) {
+                fn = gen_helper_gvec_wfc32;
+            }
+        }
+        break;
+    case FPF_LONG:
+        fn = gen_helper_gvec_wfk64;
+        if (s->fields.op2 == 0xcb) {
+            fn = gen_helper_gvec_wfc64;
+        }
+        break;
+    case FPF_EXT:
+        if (s390_has_feat(S390_FEAT_VECTOR_ENH)) {
+            fn = gen_helper_gvec_wfk128;
+            if (s->fields.op2 == 0xcb) {
+                fn = gen_helper_gvec_wfc128;
+            }
+        }
+        break;
+    default:
+        break;
+    };
+
+    if (!fn || m4) {
         gen_program_exception(s, PGM_SPECIFICATION);
         return DISAS_NORETURN;
     }
 
-    if (s->fields.op2 == 0xcb) {
-        gen_gvec_2_ptr(get_field(s, v1), get_field(s, v2),
-                       cpu_env, 0, gen_helper_gvec_wfc64);
-    } else {
-        gen_gvec_2_ptr(get_field(s, v1), get_field(s, v2),
-                       cpu_env, 0, gen_helper_gvec_wfk64);
-    }
+    gen_gvec_2_ptr(get_field(s, v1), get_field(s, v2), cpu_env, 0, fn);
     set_cc_static(s);
     return DISAS_NEXT;
 }
diff --git a/target/s390x/vec_fpu_helper.c b/target/s390x/vec_fpu_helper.c
index 67dcd8b50af0..fba5261ac4c1 100644
--- a/target/s390x/vec_fpu_helper.c
+++ b/target/s390x/vec_fpu_helper.c
@@ -307,6 +307,26 @@ DEF_GVEC_VOP3(vfs, sub)
 DEF_GVEC_VOP3(vfd, div)
 DEF_GVEC_VOP3(vfm, mul)
 
+static int wfc32(const S390Vector *v1, const S390Vector *v2,
+                 CPUS390XState *env, bool signal, uintptr_t retaddr)
+{
+    /* only the zero-indexed elements are compared */
+    const float32 a = s390_vec_read_float32(v1, 0);
+    const float32 b = s390_vec_read_float32(v2, 0);
+    uint8_t vxc, vec_exc = 0;
+    int cmp;
+
+    if (signal) {
+        cmp = float32_compare(a, b, &env->fpu_status);
+    } else {
+        cmp = float32_compare_quiet(a, b, &env->fpu_status);
+    }
+    vxc = check_ieee_exc(env, 0, false, &vec_exc);
+    handle_ieee_exc(env, vxc, vec_exc, retaddr);
+
+    return float_comp_to_cc(env, cmp);
+}
+
 static int wfc64(const S390Vector *v1, const S390Vector *v2,
                  CPUS390XState *env, bool signal, uintptr_t retaddr)
 {
@@ -327,6 +347,26 @@ static int wfc64(const S390Vector *v1, const S390Vector *v2,
     return float_comp_to_cc(env, cmp);
 }
 
+static int wfc128(const S390Vector *v1, const S390Vector *v2,
+                  CPUS390XState *env, bool signal, uintptr_t retaddr)
+{
+    /* only the zero-indexed elements are compared */
+    const float128 a = s390_vec_read_float128(v1);
+    const float128 b = s390_vec_read_float128(v2);
+    uint8_t vxc, vec_exc = 0;
+    int cmp;
+
+    if (signal) {
+        cmp = float128_compare(a, b, &env->fpu_status);
+    } else {
+        cmp = float128_compare_quiet(a, b, &env->fpu_status);
+    }
+    vxc = check_ieee_exc(env, 0, false, &vec_exc);
+    handle_ieee_exc(env, vxc, vec_exc, retaddr);
+
+    return float_comp_to_cc(env, cmp);
+}
+
 #define DEF_GVEC_WFC_B(NAME, SIGNAL, BITS)                                     \
 void HELPER(gvec_##NAME##BITS)(const void *v1, const void *v2,                 \
                                CPUS390XState *env, uint32_t desc)              \
@@ -335,7 +375,9 @@ void HELPER(gvec_##NAME##BITS)(const void *v1, const void *v2,                 \
 }
 
 #define DEF_GVEC_WFC(NAME, SIGNAL)                                             \
-     DEF_GVEC_WFC_B(NAME, SIGNAL, 64)
+     DEF_GVEC_WFC_B(NAME, SIGNAL, 32)                                          \
+     DEF_GVEC_WFC_B(NAME, SIGNAL, 64)                                          \
+     DEF_GVEC_WFC_B(NAME, SIGNAL, 128)
 
 DEF_GVEC_WFC(wfc, false)
 DEF_GVEC_WFC(wfk, true)
-- 
2.31.1