Use the new primitive for RISBG.
Cc: Alexander Graf <[email protected]>
Signed-off-by: Richard Henderson <[email protected]>
---
target-s390x/translate.c | 24 +++++++++++++++---------
1 file changed, 15 insertions(+), 9 deletions(-)
diff --git a/target-s390x/translate.c b/target-s390x/translate.c
index 02bc705..477238d 100644
--- a/target-s390x/translate.c
+++ b/target-s390x/translate.c
@@ -3134,20 +3134,26 @@ static ExitStatus op_risbg(DisasContext *s, DisasOps *o)
}
}
- /* In some cases we can implement this with deposit, which can be more
- efficient on some hosts. */
- if (~mask == imask && i3 <= i4) {
+ len = i4 - i3 + 1;
+ pos = 63 - i4;
+ rot = i5 & 63;
+
+ /* In some cases we can implement this with extract. */
+ if (imask == 0 && pos == 0 && len > 0 && rot + len <= 64) {
+ tcg_gen_extract_i64(o->out, o->in2, rot, len);
+ return NO_EXIT;
+ }
+
+ /* In some cases we can implement this with deposit. */
+ if (~mask == imask && len > 0) {
if (s->fields->op2 == 0x5d) {
- i3 += 32, i4 += 32;
+ pos += 32;
}
/* Note that we rotate the bits to be inserted to the lsb, not to
the position as described in the PoO. */
- len = i4 - i3 + 1;
- pos = 63 - i4;
- rot = (i5 - pos) & 63;
+ rot = (rot - pos) & 63;
} else {
- pos = len = -1;
- rot = i5 & 63;
+ pos = -1;
}
/* Rotate the input as necessary. */
--
2.7.4
