[PULL 12/87] target/ppc: Implement vmsumudm instruction

[Cédric Le Goater]

From: Víctor Colombo <victor.colombo@eldorado.org.br>

Based on [1] by Lijun Pan <ljp@linux.ibm.com>, which was never merged
into master.

[1]: https://lists.gnu.org/archive/html/qemu-ppc/2020-07/msg00419.html

Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Víctor Colombo <victor.colombo@eldorado.org.br>
Signed-off-by: Matheus Ferst <matheus.ferst@eldorado.org.br>
Message-Id: <20220225210936.1749575-7-matheus.ferst@eldorado.org.br>
Signed-off-by: Cédric Le Goater <clg@kaod.org>
---
 target/ppc/insn32.decode            |  1 +
 target/ppc/translate/vmx-impl.c.inc | 34 +++++++++++++++++++++++++++++
 2 files changed, 35 insertions(+)

diff --git a/target/ppc/insn32.decode b/target/ppc/insn32.decode
index e85a75db2ff7..732a2bb79ed4 100644
--- a/target/ppc/insn32.decode
+++ b/target/ppc/insn32.decode
@@ -471,6 +471,7 @@ VMULLD          000100 ..... ..... ..... 00111001001    @VX
 ## Vector Multiply-Sum Instructions
 
 VMSUMCUD        000100 ..... ..... ..... ..... 010111   @VA
+VMSUMUDM        000100 ..... ..... ..... ..... 100011   @VA
 
 # VSX Load/Store Instructions
 
diff --git a/target/ppc/translate/vmx-impl.c.inc 
b/target/ppc/translate/vmx-impl.c.inc
index 4f528dc82018..fcff3418c5c8 100644
--- a/target/ppc/translate/vmx-impl.c.inc
+++ b/target/ppc/translate/vmx-impl.c.inc
@@ -2081,6 +2081,40 @@ static bool trans_VPEXTD(DisasContext *ctx, arg_VX *a)
     return true;
 }
 
+static bool trans_VMSUMUDM(DisasContext *ctx, arg_VA *a)
+{
+    TCGv_i64 rl, rh, src1, src2;
+    int dw;
+
+    REQUIRE_INSNS_FLAGS2(ctx, ISA300);
+    REQUIRE_VECTOR(ctx);
+
+    rh = tcg_temp_new_i64();
+    rl = tcg_temp_new_i64();
+    src1 = tcg_temp_new_i64();
+    src2 = tcg_temp_new_i64();
+
+    get_avr64(rl, a->rc, false);
+    get_avr64(rh, a->rc, true);
+
+    for (dw = 0; dw < 2; dw++) {
+        get_avr64(src1, a->vra, dw);
+        get_avr64(src2, a->vrb, dw);
+        tcg_gen_mulu2_i64(src1, src2, src1, src2);
+        tcg_gen_add2_i64(rl, rh, rl, rh, src1, src2);
+    }
+
+    set_avr64(a->vrt, rl, false);
+    set_avr64(a->vrt, rh, true);
+
+    tcg_temp_free_i64(rl);
+    tcg_temp_free_i64(rh);
+    tcg_temp_free_i64(src1);
+    tcg_temp_free_i64(src2);
+
+    return true;
+}
+
 static bool trans_VMSUMCUD(DisasContext *ctx, arg_VA *a)
 {
     TCGv_i64 tmp0, tmp1, prod1h, prod1l, prod0h, prod0l, zero;
-- 
2.34.1