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authorLucas Mateus Castro (alqotel)2022-05-24 16:05:30 +0200
committerDaniel Henrique Barboza2022-05-26 22:11:33 +0200
commita702c5339eda791b969ed531ce99456df7ca8451 (patch)
tree4bbff29dd291a3a3518204e4af0ddf4fc04116f1 /target/ppc/translate
parenttarget/ppc: Implement lwsync with weaker memory ordering (diff)
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target/ppc: Implement xxm[tf]acc and xxsetaccz
Implement the following PowerISA v3.1 instructions: xxmfacc: VSX Move From Accumulator xxmtacc: VSX Move To Accumulator xxsetaccz: VSX Set Accumulator to Zero The PowerISA 3.1 mentions that for the current version of the architecture, "the hardware implementation provides the effect of ACC[i] and VSRs 4*i to 4*i + 3 logically containing the same data" and "The Accumulators introduce no new logical state at this time" (page 501). For now it seems unnecessary to create new structures, so this patch just uses ACC[i] as VSRs 4*i to 4*i+3 and therefore move to and from accumulators are no-ops. Signed-off-by: Lucas Mateus Castro (alqotel) <lucas.araujo@eldorado.org.br> Reviewed-by: Richard Henderson <richard.henderson@linaro.org> Message-Id: <20220524140537.27451-2-lucas.araujo@eldorado.org.br> Signed-off-by: Daniel Henrique Barboza <danielhb413@gmail.com>
Diffstat (limited to 'target/ppc/translate')
-rw-r--r--target/ppc/translate/vsx-impl.c.inc31
1 files changed, 31 insertions, 0 deletions
diff --git a/target/ppc/translate/vsx-impl.c.inc b/target/ppc/translate/vsx-impl.c.inc
index 900c1a1ab2..235be360e2 100644
--- a/target/ppc/translate/vsx-impl.c.inc
+++ b/target/ppc/translate/vsx-impl.c.inc
@@ -2816,6 +2816,37 @@ static bool trans_XVCVBF16SPN(DisasContext *ctx, arg_XX2 *a)
return true;
}
+ /*
+ * The PowerISA 3.1 mentions that for the current version of the
+ * architecture, "the hardware implementation provides the effect of
+ * ACC[i] and VSRs 4*i to 4*i + 3 logically containing the same data"
+ * and "The Accumulators introduce no new logical state at this time"
+ * (page 501). For now it seems unnecessary to create new structures,
+ * so ACC[i] is the same as VSRs 4*i to 4*i+3 and therefore
+ * move to and from accumulators are no-ops.
+ */
+static bool trans_XXMFACC(DisasContext *ctx, arg_X_a *a)
+{
+ REQUIRE_INSNS_FLAGS2(ctx, ISA310);
+ REQUIRE_VSX(ctx);
+ return true;
+}
+
+static bool trans_XXMTACC(DisasContext *ctx, arg_X_a *a)
+{
+ REQUIRE_INSNS_FLAGS2(ctx, ISA310);
+ REQUIRE_VSX(ctx);
+ return true;
+}
+
+static bool trans_XXSETACCZ(DisasContext *ctx, arg_X_a *a)
+{
+ REQUIRE_INSNS_FLAGS2(ctx, ISA310);
+ REQUIRE_VSX(ctx);
+ tcg_gen_gvec_dup_imm(MO_64, acc_full_offset(a->ra), 64, 64, 0);
+ return true;
+}
+
#undef GEN_XX2FORM
#undef GEN_XX3FORM
#undef GEN_XX2IFORM