[PATCH v5 21/23] target/ppc: Implement vcfuged instruction

[matheus.ferst@eldorado.org.br]

From: Matheus Ferst <matheus.ferst@eldorado.org.br>

Signed-off-by: Matheus Ferst <matheus.ferst@eldorado.org.br>
---
v5:
- New REQUIRE_ALTIVEC macro;
- REQUIRE_INSNS_FLAGS2.
---
 target/ppc/insn32.decode               |  7 ++++
 target/ppc/translate.c                 |  1 +
 target/ppc/translate/vector-impl.c.inc | 56 ++++++++++++++++++++++++++
 3 files changed, 64 insertions(+)
 create mode 100644 target/ppc/translate/vector-impl.c.inc

diff --git a/target/ppc/insn32.decode b/target/ppc/insn32.decode
index d4044d9069..77edf407ab 100644
--- a/target/ppc/insn32.decode
+++ b/target/ppc/insn32.decode
@@ -23,6 +23,9 @@
 %ds_si          2:s14  !function=times_4
 @DS             ...... rt:5 ra:5 .............. ..      &D si=%ds_si
 
+&VX             vrt vra vrb
+@VX             ...... vrt:5 vra:5 vrb:5 .......... .   &VX
+
 &X              rt ra rb
 @X              ...... rt:5 ra:5 rb:5 .......... .      &X
 
@@ -97,3 +100,7 @@ SETBC           011111 ..... ..... ----- 0110000000 -   @X_bi
 SETBCR          011111 ..... ..... ----- 0110100000 -   @X_bi
 SETNBC          011111 ..... ..... ----- 0111000000 -   @X_bi
 SETNBCR         011111 ..... ..... ----- 0111100000 -   @X_bi
+
+## Vector Bit Manipulation Instruction
+
+VCFUGED         000100 ..... ..... ..... 10101001101    @VX
diff --git a/target/ppc/translate.c b/target/ppc/translate.c
index bf624edba6..f56ed5866e 100644
--- a/target/ppc/translate.c
+++ b/target/ppc/translate.c
@@ -7624,6 +7624,7 @@ static int times_4(DisasContext *ctx, int x)
 #include "translate/vmx-impl.c.inc"
 
 #include "translate/vsx-impl.c.inc"
+#include "translate/vector-impl.c.inc"
 
 #include "translate/dfp-impl.c.inc"
 
diff --git a/target/ppc/translate/vector-impl.c.inc b/target/ppc/translate/vector-impl.c.inc
new file mode 100644
index 0000000000..4f986cf53f
--- /dev/null
+++ b/target/ppc/translate/vector-impl.c.inc
@@ -0,0 +1,56 @@
+/*
+ * Power ISA decode for Vector Facility instructions
+ *
+ * Copyright (c) 2021 Instituto de Pesquisas Eldorado (eldorado.org.br)
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, see <http://www.gnu.org/licenses/>.
+ */
+
+#define REQUIRE_ALTIVEC(CTX) \
+    do {                                                \
+        if (unlikely(!(CTX)->altivec_enabled)) {        \
+            gen_exception((CTX), POWERPC_EXCP_VPU);     \
+            return true;                                \
+        }                                               \
+    } while (0)
+
+static bool trans_VCFUGED(DisasContext *ctx, arg_VX *a)
+{
+    TCGv_i64 tgt, src, mask;
+
+    REQUIRE_INSNS_FLAGS2(ctx, ISA310);
+    REQUIRE_ALTIVEC(ctx);
+
+    tgt = tcg_temp_new_i64();
+    src = tcg_temp_new_i64();
+    mask = tcg_temp_new_i64();
+
+    // centrifuge lower double word
+    get_cpu_vsrl(src, a->vra + 32);
+    get_cpu_vsrl(mask, a->vrb + 32);
+    gen_helper_cfuged(tgt, src, mask);
+    set_cpu_vsrl(a->vrt + 32, tgt);
+
+    // centrifuge higher double word
+    get_cpu_vsrh(src, a->vra + 32);
+    get_cpu_vsrh(mask, a->vrb + 32);
+    gen_helper_cfuged(tgt, src, mask);
+    set_cpu_vsrh(a->vrt + 32, tgt);
+
+    tcg_temp_free_i64(tgt);
+    tcg_temp_free_i64(src);
+    tcg_temp_free_i64(mask);
+
+    return true;
+}
-- 
2.25.1