[PULL 10/54] target/ppc: Implement pextd instruction

[David Gibson]

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

Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Matheus Ferst <matheus.ferst@eldorado.org.br>
Message-Id: <20211029202424.175401-11-matheus.ferst@eldorado.org.br>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
---
 target/ppc/helper.h                        |  1 +
 target/ppc/insn32.decode                   |  1 +
 target/ppc/int_helper.c                    | 18 ++++++++++++++++++
 target/ppc/translate/fixedpoint-impl.c.inc | 12 ++++++++++++
 4 files changed, 32 insertions(+)

diff --git a/target/ppc/helper.h b/target/ppc/helper.h
index 3e22957559..808c582382 100644
--- a/target/ppc/helper.h
+++ b/target/ppc/helper.h
@@ -49,6 +49,7 @@ DEF_HELPER_3(sraw, tl, env, tl, tl)
 DEF_HELPER_FLAGS_2(cfuged, TCG_CALL_NO_RWG_SE, i64, i64, i64)
 #if defined(TARGET_PPC64)
 DEF_HELPER_FLAGS_2(PDEPD, TCG_CALL_NO_RWG_SE, i64, i64, i64)
+DEF_HELPER_FLAGS_2(PEXTD, TCG_CALL_NO_RWG_SE, i64, i64, i64)
 DEF_HELPER_FLAGS_2(cmpeqb, TCG_CALL_NO_RWG_SE, i32, tl, tl)
 DEF_HELPER_FLAGS_1(popcntw, TCG_CALL_NO_RWG_SE, tl, tl)
 DEF_HELPER_FLAGS_2(bpermd, TCG_CALL_NO_RWG_SE, i64, i64, i64)
diff --git a/target/ppc/insn32.decode b/target/ppc/insn32.decode
index c47a6a02e1..e13f920702 100644
--- a/target/ppc/insn32.decode
+++ b/target/ppc/insn32.decode
@@ -127,6 +127,7 @@ CFUGED          011111 ..... ..... ..... 0011011100 -   @X
 CNTLZDM         011111 ..... ..... ..... 0000111011 -   @X
 CNTTZDM         011111 ..... ..... ..... 1000111011 -   @X
 PDEPD           011111 ..... ..... ..... 0010011100 -   @X
+PEXTD           011111 ..... ..... ..... 0010111100 -   @X
 
 ### Float-Point Load Instructions
 
diff --git a/target/ppc/int_helper.c b/target/ppc/int_helper.c
index 337bb7f4d3..913d76be6e 100644
--- a/target/ppc/int_helper.c
+++ b/target/ppc/int_helper.c
@@ -404,6 +404,24 @@ uint64_t helper_PDEPD(uint64_t src, uint64_t mask)
 
     return result;
 }
+
+uint64_t helper_PEXTD(uint64_t src, uint64_t mask)
+{
+    int i, o;
+    uint64_t result = 0;
+
+    if (mask == -1) {
+        return src;
+    }
+
+    for (o = 0; mask != 0; o++) {
+        i = ctz64(mask);
+        mask &= mask - 1;
+        result |= ((src >> i) & 1) << o;
+    }
+
+    return result;
+}
 #endif
 
 /*****************************************************************************/
diff --git a/target/ppc/translate/fixedpoint-impl.c.inc 
b/target/ppc/translate/fixedpoint-impl.c.inc
index f0bf69fbac..220b099fcd 100644
--- a/target/ppc/translate/fixedpoint-impl.c.inc
+++ b/target/ppc/translate/fixedpoint-impl.c.inc
@@ -481,3 +481,15 @@ static bool trans_PDEPD(DisasContext *ctx, arg_X *a)
 #endif
     return true;
 }
+
+static bool trans_PEXTD(DisasContext *ctx, arg_X *a)
+{
+    REQUIRE_64BIT(ctx);
+    REQUIRE_INSNS_FLAGS2(ctx, ISA310);
+#if defined(TARGET_PPC64)
+    gen_helper_PEXTD(cpu_gpr[a->ra], cpu_gpr[a->rt], cpu_gpr[a->rb]);
+#else
+    qemu_build_not_reached();
+#endif
+    return true;
+}
-- 
2.33.1