1 files changed, 0 insertions, 84 deletions
diff --git a/gitlab/issues_text/target_arm/host_missing/accel_TCG/1833 b/gitlab/issues_text/target_arm/host_missing/accel_TCG/1833
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index a74f7bdb9..000000000
--- a/gitlab/issues_text/target_arm/host_missing/accel_TCG/1833
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@@ -1,84 +0,0 @@
-ARM64 SME ST1Q incorrectly stores 9 bytes (rather than 16) per 128-bit element
-Description of problem:
-QEMU incorrectly stores 9 bytes instead of 16 per 128-bit element in the ST1Q SME instruction (https://developer.arm.com/documentation/ddi0602/2022-06/SME-Instructions/ST1Q--Contiguous-store-of-quadwords-from-128-bit-element-ZA-tile-slice-). It copies the first byte of the upper 64-bits, then lower the 64-bits.
-
-This seems to be a simple issue; I tracked it down to:
-https://gitlab.com/qemu-project/qemu/-/blob/master/target/arm/tcg/sme_helper.c?ref_type=heads#L382
-
-Updating that `+ 1` to a `+ 8` fixes the problem.
-Steps to reproduce:
-```c
-#include <stdio.h>
-#include <stdint.h>
-#include <string.h>
-
-void st1q_sme_copy_test(uint8_t* src,  uint8_t* dest) {
-  asm volatile(
-    "smstart sm\n"
-    "smstart za\n"
-    "ptrue p0.b\n"
-    "mov x12, xzr\n"
-    "ld1q {za0h.q[w12, 0]}, p0/z, %0\n"
-    "st1q {za0h.q[w12, 0]}, p0, %1\n"
-    "smstop za\n"
-    "smstop sm\n" : : "m"(*src), "m"(*dest) : "w12", "p0");
-}
-
-void print_first_128(uint8_t* data) {
-  putchar('[');
-  for (int i = 0; i < 16; i++) {
-    printf("%02d", data[i]);
-    if (i != 15)
-      printf(", ");
-  }
-  printf("]\n");
-}
-
-int main() {
-  _Alignas(16) uint8_t dest[512] = { };
-  _Alignas(16) uint8_t src[512] = { };
-  for (int i = 0; i < sizeof(src); i++)
-    src[i] = i;
-  puts("Before");
-  printf(" src: ");
-  print_first_128(src);
-  printf("dest: ");
-  print_first_128(dest);
-  st1q_sme_copy_test(src, dest);
-  puts("\nAfter ");
-  printf(" src: ");
-  print_first_128(src);
-  printf("dest: ");
-  print_first_128(dest);
-}
-```
-
-Compile with (requires at least clang ~14, tested with clang 16):<br/>
-`clang ./qemu_repro.c -march=armv9-a+sme+sve -o ./qemu_repro` 
-
-Run with:<br/>
-`qemu-aarch64 -cpu max,sme=on ./qemu_repro`
-
-It's expected just to copy from `src` to `dest` and output:
-```
-Before
- src: [00, 01, 02, 03, 04, 05, 06, 07, 08, 09, 10, 11, 12, 13, 14, 15]
-dest: [00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00]
-
-After 
- src: [00, 01, 02, 03, 04, 05, 06, 07, 08, 09, 10, 11, 12, 13, 14, 15]
-dest: [00, 01, 02, 03, 04, 05, 06, 07, 08, 09, 10, 11, 12, 13, 14, 15]
-```
-
-But currently outputs:
-```
-Before
- src: [00, 01, 02, 03, 04, 05, 06, 07, 08, 09, 10, 11, 12, 13, 14, 15]
-dest: [00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00]
-
-After 
- src: [00, 01, 02, 03, 04, 05, 06, 07, 08, 09, 10, 11, 12, 13, 14, 15]
-dest: [00, 08, 09, 10, 11, 12, 13, 14, 15, 00, 00, 00, 00, 00, 00, 00]
-```
-Additional information:
-N/A