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[PULL,05/38] target/sparc: Fix helper_fmul8ulx16

Message ID 20240605172253.356302-6-richard.henderson@linaro.org
State Accepted
Commit b5c960470d0d7a976aa83e6e3a9b0fdc1d83c7cd
Headers show
Series [PULL,01/38] linux-user: Add ioctl for BLKBSZSET | expand

Commit Message

Richard Henderson June 5, 2024, 5:22 p.m. UTC 
This operation returns the high 16 bits of a 24-bit multiply
that has been sign-extended to 32 bits.

Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
---
 target/sparc/vis_helper.c | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)
diff mbox series

Patch

diff --git a/target/sparc/vis_helper.c b/target/sparc/vis_helper.c
index f46fcf1f6a..41312deda4 100644
--- a/target/sparc/vis_helper.c
+++ b/target/sparc/vis_helper.c
@@ -174,10 +174,10 @@  uint64_t helper_fmul8ulx16(uint64_t src1, uint64_t src2)
     s.ll = src1;
     d.ll = src2;
 
-    d.VIS_W64(0) = do_ms16b(s.VIS_B64(0), d.VIS_SW64(0));
-    d.VIS_W64(1) = do_ms16b(s.VIS_B64(2), d.VIS_SW64(1));
-    d.VIS_W64(2) = do_ms16b(s.VIS_B64(4), d.VIS_SW64(2));
-    d.VIS_W64(3) = do_ms16b(s.VIS_B64(6), d.VIS_SW64(3));
+    d.VIS_W64(0) = (s.VIS_B64(0) * d.VIS_SW64(0) + 0x8000) >> 16;
+    d.VIS_W64(1) = (s.VIS_B64(2) * d.VIS_SW64(1) + 0x8000) >> 16;
+    d.VIS_W64(2) = (s.VIS_B64(4) * d.VIS_SW64(2) + 0x8000) >> 16;
+    d.VIS_W64(3) = (s.VIS_B64(6) * d.VIS_SW64(3) + 0x8000) >> 16;
 
     return d.ll;
 }