[Qemu-devel] [PATCH v2 0/3] Improve 128-bit multiply primitives

[Richard Henderson]

Changes v1->v2:
  * Use __[u]int128_t as per Blue's comment.  I'd actually forgotten
    that gcc automatically addeds those typedefs.

  * Keep the internal mul64 routine, but mark it inline.  The v1
    patch relied in gcc's pre-c99 inlining semantics.  The v2 patch
    ought to compile in strict c99 mode.

  * Add unit tests, as per Andreas' comment.

Tested on x86_64, i686, and arm hosts.


r~
    

Richard Henderson (3):
  host-utils: Use __int128_t for mul[us]64
  host-utils: Improve mulu64 and muls64
  tests: Add unit tests for mulu64 and muls64

 configure                 | 20 ++++++++++
 include/qemu/host-utils.h | 17 ++++-----
 tests/Makefile            |  7 +++-
 tests/test-mul64.c        | 69 ++++++++++++++++++++++++++++++++++
 util/host-utils.c         | 96 ++++++++++++++++++++---------------------------
 5 files changed, 143 insertions(+), 66 deletions(-)
 create mode 100644 tests/test-mul64.c

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1.7.11.7