target/hppa: Implement HSUB

Signed-off-by: Richard Henderson <richard.henderson@linaro.org>

1 files changed, 32 insertions, 0 deletions

diff --git a/target/hppa/op_helper.c b/target/hppa/op_helper.c
index d93801ca47..de51905428 100644
--- a/target/hppa/op_helper.c
+++ b/target/hppa/op_helper.c
@@ -409,3 +409,35 @@ uint64_t HELPER(hadd_us)(uint64_t r1, uint64_t r2)
     }
     return ret;
 }
+
+uint64_t HELPER(hsub_ss)(uint64_t r1, uint64_t r2)
+{
+    uint64_t ret = 0;
+
+    for (int i = 0; i < 64; i += 16) {
+        int f1 = sextract64(r1, i, 16);
+        int f2 = sextract64(r2, i, 16);
+        int fr = f1 - f2;
+
+        fr = MIN(fr, INT16_MAX);
+        fr = MAX(fr, INT16_MIN);
+        ret = deposit64(ret, i, 16, fr);
+    }
+    return ret;
+}
+
+uint64_t HELPER(hsub_us)(uint64_t r1, uint64_t r2)
+{
+    uint64_t ret = 0;
+
+    for (int i = 0; i < 64; i += 16) {
+        int f1 = extract64(r1, i, 16);
+        int f2 = sextract64(r2, i, 16);
+        int fr = f1 - f2;
+
+        fr = MIN(fr, UINT16_MAX);
+        fr = MAX(fr, 0);
+        ret = deposit64(ret, i, 16, fr);
+    }
+    return ret;
+}