target/ppc: Implement pextd instruction

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>

1 files changed, 18 insertions, 0 deletions

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
 
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