add gitlab issues in toml format

1 files changed, 51 insertions, 0 deletions

diff --git a/gitlab/issues/target_missing/host_missing/accel_missing/2386.toml b/gitlab/issues/target_missing/host_missing/accel_missing/2386.toml
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+id = 2386
+title = "RISCV - Incorrect behaviour of the SLL instruction"
+state = "closed"
+created_at = "2024-06-09T18:31:27.404Z"
+closed_at = "2024-06-09T18:38:34.624Z"
+labels = ["Closed::Invalid"]
+url = "https://gitlab.com/qemu-project/qemu/-/issues/2386"
+host-os = "WSL2, Windows 10"
+host-arch = "x86"
+qemu-version = "qemu-riscv64 version 9.0.50 (v9.0.0-1377-g3e246da2c3)"
+guest-os = "n/a"
+guest-arch = "n/a"
+description = """`SLL` (and probably other similar instructions) produce incorrect results. To quote the [RISCV ISA manual](https://drive.google.com/file/d/1uviu1nH-tScFfgrovvFCrj7Omv8tFtkp/view):
+
+> SLL, SRL, and SRA perform logical left, logical right, and arithmetic right shifts on the value in register
+rs1 by the shift amount held in the lower 5 bits of register rs2.
+
+This instruction should perform a logical shift left by the shift amount from the lower 5 bits held in the third operand, however, it doesn't seem to be the case. As can be seen from the result of the snippet below: `55c3585000000000`, it seems that it calculates the correct value, but then shifts it by another 32 bits to the left:
+
+```python
+correct_shift_res = (0xDB4D6868655C3585 << (0x69C99AB9B9401024 & 0b11111)) & (2 ** 64 - 1)
+incorrect_qemu_produced = (correct_shift_res << 32) & (2 ** 64 - 1)
+```"""
+reproduce = """1. Compile the attached source file: `riscv64-linux-gnu-gcc -static repro.c -o ./repro.elf`
+
+```c
+#include <stdint.h>
+#include <stdio.h>
+
+int main() {
+  uint64_t a = 0x69C99AB9B9401024;
+  uint64_t b = 0xDB4D6868655C3585;
+  uint64_t c;
+
+  asm volatile("sll %0, %1, %2" : "=r"(c) : "r"(b), "r"(a));
+
+  printf("s8      : %lx\\n", c);
+  printf("expected: %lx\\n", 0xb4d6868655c35850);
+
+  return 0;
+}
+```
+
+2. Run qemu: `./qemu-riscv64 ./repro.elf`
+3. You will see the output and what the result of the computation should really be:
+
+```
+s8      : 55c3585000000000
+expected: b4d6868655c35850
+```"""
+additional = """"""