target/s390x: Implement DIVIDE TO INTEGER

[PATCH 0/3] target/s390x: Implement DIVIDE TO INTEGER

Ilya Leoshkevich posted 3 patches 3 days, 10 hours ago

Download series mbox

Patches applied successfully (tree, apply log)
git fetch https://github.com/patchew-project/qemu tags/patchew/20260121222116.713325-1-iii@linux.ibm.com

Maintainers: Richard Henderson <richard.henderson@linaro.org>, Ilya Leoshkevich <iii@linux.ibm.com>, David Hildenbrand <david@kernel.org>, Thomas Huth <thuth@redhat.com>

target/s390x/cpu-dump.c             |   1 +
target/s390x/helper.h               |   2 +
target/s390x/tcg/fpu_helper.c       | 199 +++++++++++++++++++++++++
target/s390x/tcg/insn-data.h.inc    |   5 +-
target/s390x/tcg/translate.c        |  26 ++++
tests/tcg/s390x/Makefile.target     |   3 +
tests/tcg/s390x/divide-to-integer.c | 215 ++++++++++++++++++++++++++++
7 files changed, 450 insertions(+), 1 deletion(-)
create mode 100644 tests/tcg/s390x/divide-to-integer.c

Expand all Fold all

[PATCH 0/3] target/s390x: Implement DIVIDE TO INTEGER

Posted by Ilya Leoshkevich 3 days, 10 hours ago

Hi,

This series implements DIVIDE TO INTEGER instruction, which is
required to run LuaJIT.

Patch 1 is a debugging helper. Patch 2 is the implementation.

Since the instruction is quite complex, I've extensively tested it
using a libFuzzer-based harness [1] that compares emulation with native
execution at ~15k exec/s. The tests (patch 3) use data generated
this way.

Best regards,
Ilya

[1] https://github.com/iii-i/qemu/commits/iii/wip/fuzz-tcg-v1/

Ilya Leoshkevich (3):
  target/s390x: Dump Floating-Point-Control Register
  target/s390x: Implement DIVIDE TO INTEGER
  tests/tcg/s390x: Test DIVIDE TO INTEGER

 target/s390x/cpu-dump.c             |   1 +
 target/s390x/helper.h               |   2 +
 target/s390x/tcg/fpu_helper.c       | 199 +++++++++++++++++++++++++
 target/s390x/tcg/insn-data.h.inc    |   5 +-
 target/s390x/tcg/translate.c        |  26 ++++
 tests/tcg/s390x/Makefile.target     |   3 +
 tests/tcg/s390x/divide-to-integer.c | 215 ++++++++++++++++++++++++++++
 7 files changed, 450 insertions(+), 1 deletion(-)
 create mode 100644 tests/tcg/s390x/divide-to-integer.c

-- 
2.52.0