diff mbox series

[01/13] target/arm: Fix VCMLA Dd, Dn, Dm[idx]

Message ID 20240625050810.1475643-2-richard.henderson@linaro.org
State Superseded
Headers show
Series target/arm: AdvSIMD conversion, part 2 | expand

Commit Message

Richard Henderson June 25, 2024, 5:07 a.m. UTC 
The inner loop, bounded by eltspersegment, must not be
larger than the outer loop, bounded by elements.

Cc: qemu-stable@nongnu.org
Fixes: 18fc2405781 ("target/arm: Implement SVE fp complex multiply add (indexed)")
Resolves: https://gitlab.com/qemu-project/qemu/-/issues/2376
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
---
 target/arm/tcg/vec_helper.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

Comments

Peter Maydell June 25, 2024, 11:42 a.m. UTC | #1 
On Tue, 25 Jun 2024 at 06:09, Richard Henderson
<richard.henderson@linaro.org> wrote:
>
> The inner loop, bounded by eltspersegment, must not be
> larger than the outer loop, bounded by elements.
>
> Cc: qemu-stable@nongnu.org
> Fixes: 18fc2405781 ("target/arm: Implement SVE fp complex multiply add (indexed)")
> Resolves: https://gitlab.com/qemu-project/qemu/-/issues/2376
> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
> ---

Reviewed-by: Peter Maydell <peter.maydell@linaro.org>

thanks
-- PMM
diff mbox series

Patch

diff --git a/target/arm/tcg/vec_helper.c b/target/arm/tcg/vec_helper.c
index b05922b425..7b34cc98af 100644
--- a/target/arm/tcg/vec_helper.c
+++ b/target/arm/tcg/vec_helper.c
@@ -907,7 +907,7 @@  void HELPER(gvec_fcmlah_idx)(void *vd, void *vn, void *vm, void *va,
     intptr_t index = extract32(desc, SIMD_DATA_SHIFT + 2, 2);
     uint32_t neg_real = flip ^ neg_imag;
     intptr_t elements = opr_sz / sizeof(float16);
-    intptr_t eltspersegment = 16 / sizeof(float16);
+    intptr_t eltspersegment = MIN(16 / sizeof(float16), elements);
     intptr_t i, j;
 
     /* Shift boolean to the sign bit so we can xor to negate.  */
@@ -969,7 +969,7 @@  void HELPER(gvec_fcmlas_idx)(void *vd, void *vn, void *vm, void *va,
     intptr_t index = extract32(desc, SIMD_DATA_SHIFT + 2, 2);
     uint32_t neg_real = flip ^ neg_imag;
     intptr_t elements = opr_sz / sizeof(float32);
-    intptr_t eltspersegment = 16 / sizeof(float32);
+    intptr_t eltspersegment = MIN(16 / sizeof(float32), elements);
     intptr_t i, j;
 
     /* Shift boolean to the sign bit so we can xor to negate.  */