target/i386: support x86_64-v3 for user mode applications

[PATCH 0/4] target/i386: support x86_64-v3 for user mode applications

Paolo Bonzini posted 4 patches 1 year, 6 months ago

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Patches applied successfully (tree, apply log)
git fetch https://github.com/patchew-project/qemu tags/patchew/20221019150616.929463-1-pbonzini@redhat.com

Maintainers: Paolo Bonzini <pbonzini@redhat.com>, Richard Henderson <richard.henderson@linaro.org>, Eduardo Habkost <eduardo@habkost.net>

target/i386/cpu.c                |   8 +-
target/i386/cpu.h                |   3 +
target/i386/ops_sse.h            | 152 +++++++++++++++++++------------
target/i386/ops_sse_header.h     |  34 +++++++
target/i386/tcg/decode-new.c.inc |  46 ++++++++++
target/i386/tcg/decode-new.h     |   3 +
target/i386/tcg/emit.c.inc       |  60 +++++++++++-
target/i386/tcg/fpu_helper.c     |  60 +++++-------
tests/tcg/i386/test-avx.c        |  17 ++++
tests/tcg/i386/test-avx.py       |   8 +-
10 files changed, 289 insertions(+), 102 deletions(-)

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[PATCH 0/4] target/i386: support x86_64-v3 for user mode applications

Posted by Paolo Bonzini 1 year, 6 months ago

The v3 ISA for x86_64 includes F16C and FMA instructions in addition to
AVX2 that was just committed for QEMU 7.2.  This small series implements
these two features and terminates my excursion into x86 TCG. :)

Patch 1 is a bugfix for the new decoder (sob).

Patch 2 introduces a common function to convert an x86 2-bit rounding
mode (as specified in FSTCW, STMXCSR and VROUND instructions).  Since
the same operand is used by the F16C instruction VCVTPS2PH, it is time
to reduce the code duplication instead of adding more.

Patches 3 and 4 is the actual implementation, which includes all of
helpers, decoding, TCG op emission and tests.  Output from QEMU
matches that from native x86.

Paolo Bonzini (4):
  target/i386: decode-new: avoid out-of-bounds access to xmm_regs[-1]
  target/i386: introduce function to set rounding mode from FPCW or
    MXCSR bits
  target/i386: implement F16C instructions
  target/i386: implement FMA instructions

 target/i386/cpu.c                |   8 +-
 target/i386/cpu.h                |   3 +
 target/i386/ops_sse.h            | 152 +++++++++++++++++++------------
 target/i386/ops_sse_header.h     |  34 +++++++
 target/i386/tcg/decode-new.c.inc |  46 ++++++++++
 target/i386/tcg/decode-new.h     |   3 +
 target/i386/tcg/emit.c.inc       |  60 +++++++++++-
 target/i386/tcg/fpu_helper.c     |  60 +++++-------
 tests/tcg/i386/test-avx.c        |  17 ++++
 tests/tcg/i386/test-avx.py       |   8 +-
 10 files changed, 289 insertions(+), 102 deletions(-)

-- 
2.37.3