[PATCH v2 00/12] VMX/VSX instructions with gvec

[Lucas Mateus Castro(alqotel)]

From: "Lucas Mateus Castro (alqotel)" <lucas.araujo@eldorado.org.br>

Patches missing review: 3,5,9,11,12

v1 -> v2:
    - Implemented instructions with fni4/fni8 and dropped the helper:
        * VSUBCUW
        * VADDCUW
        * VPRTYBW
        * VPRTYBD
    - Reworked patch12 to only use gvec implementation with a few
      immediates.
    - Used bitsel_ver on patch9
    - Changed vec variables to tcg_constant_vec when possible

This patch series moves some instructions from decode legacy to
decodetree and translate said instructions with gvec. Some cases using
gvec ended up with a bigger, more complex and slower so those
instructions were only moved to decodetree.

In each patch there's a comparison of the execution time before the
patch being applied and after. Said result is the sum of 10 executions.

The program used to time the execution worked like this:

clock_t start = clock();
for (int i = 0; i < LOOP; i++) {
    asm (
         load values in registers, between 2 and 3 instructions
         ".rept REPT\n\t"
         "INSTRUCTION registers\n\t"
         ".endr\n\t"
         save result from register, 1 instruction
    );
}
clock_t end = clock();
printf("INSTRUCTION rept=REPT loop=LOOP, time taken: %.12lf\n",
       ((double)(end - start))/ CLOCKS_PER_SEC);

Where the column rept in the value used in .rept in the inline assembly
and loop column is the value used for the for loop. All of those tests
were executed on a Power9. When comparing the TCGop the data used was
gathered using '-d op' and '-d op_opt'.

Lucas Mateus Castro (alqotel) (12):
  target/ppc: Moved VMLADDUHM to decodetree and use gvec
  target/ppc: Move VMH[R]ADDSHS instruction to decodetree
  target/ppc: Move V(ADD|SUB)CUW to decodetree and use gvec
  target/ppc: Move VNEG[WD] to decodtree and use gvec
  target/ppc: Move VPRTYB[WDQ] to decodetree and use gvec
  target/ppc: Move VAVG[SU][BHW] to decodetree and use gvec
  target/ppc: Move VABSDU[BHW] to decodetree and use gvec
  target/ppc: Use gvec to decode XV[N]ABS[DS]P/XVNEG[DS]P
  target/ppc: Use gvec to decode XVCPSGN[SD]P
  target/ppc: Moved XVTSTDC[DS]P to decodetree
  target/ppc: Moved XSTSTDC[QDS]P to decodetree
  target/ppc: Use gvec to decode XVTSTDC[DS]P

 target/ppc/fpu_helper.c             | 140 +++++-----
 target/ppc/helper.h                 |  42 ++-
 target/ppc/insn32.decode            |  50 ++++
 target/ppc/int_helper.c             | 107 ++------
 target/ppc/translate.c              |   1 -
 target/ppc/translate/vmx-impl.c.inc | 364 +++++++++++++++++++++----
 target/ppc/translate/vmx-ops.c.inc  |  15 +-
 target/ppc/translate/vsx-impl.c.inc | 394 +++++++++++++++++++++++-----
 target/ppc/translate/vsx-ops.c.inc  |  21 --
 9 files changed, 808 insertions(+), 326 deletions(-)

-- 
2.37.3