[v3] tcg/ppc: direct branching, power9, power10

[PATCH v3 00/14] tcg/ppc: direct branching, power9, power10

Richard Henderson posted 14 patches 9 months ago

Diff against v4
Download series mbox

Patches applied successfully (tree, apply log)
git fetch https://github.com/patchew-project/qemu tags/patchew/20230815195741.8325-1-richard.henderson@linaro.org

Maintainers: Richard Henderson <richard.henderson@linaro.org>, WANG Xuerui <git@xen0n.name>, "Philippe Mathieu-Daudé" <philmd@linaro.org>, Aurelien Jarno <aurelien@aurel32.net>, Huacai Chen <chenhuacai@kernel.org>, Jiaxun Yang <jiaxun.yang@flygoat.com>, Aleksandar Rikalo <aleksandar.rikalo@syrmia.com>, Palmer Dabbelt <palmer@dabbelt.com>, Alistair Francis <Alistair.Francis@wdc.com>, Stefan Weil <sw@weilnetz.de>

There is a newer version of this series

tcg/tcg.c                        |   3 +
tcg/aarch64/tcg-target.c.inc     |   5 +
tcg/arm/tcg-target.c.inc         |   5 +
tcg/i386/tcg-target.c.inc        |   5 +
tcg/loongarch64/tcg-target.c.inc |   5 +
tcg/mips/tcg-target.c.inc        |   5 +
tcg/ppc/tcg-target.c.inc         | 280 ++++++++++++++++++++++++++-----
tcg/riscv/tcg-target.c.inc       |   5 +
tcg/s390x/tcg-target.c.inc       |   5 +
tcg/sparc64/tcg-target.c.inc     |   5 +
tcg/tci/tcg-target.c.inc         |   5 +
11 files changed, 288 insertions(+), 40 deletions(-)

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[PATCH v3 00/14] tcg/ppc: direct branching, power9, power10

Posted by Richard Henderson 9 months ago

Supercedes: 20230808030250.50602-1-richard.henderson@linaro.org
Supercedes: 20230815050117.34731-1-jniethe5@gmail.com

Build on Jordan's patch to allow direct branching and USE_REG_TB
to co-exist.  Use the power9 addpcis wherever pc-relative addrs
might be handy.  Merge in my power10 patches for prefixed insns.

Finish up with an RFC to disable TCG_REG_TB for power9+, when
pc-relative code sequences exist.  I've only lightly tested this,
and it seems to increase code size by a few insns per TB.  It
really depends on how much we end up using the constant pool.

What is needed is to determine if !TCG_REG_TB helps.  If it doesn't,
then some of these patches could be dropped as unreachable.


r~


Jordan Niethe (1):
  tcg/ppc: Enable direct branching tcg_out_goto_tb with TCG_REG_TB

Richard Henderson (13):
  tcg/ppc: Untabify tcg-target.c.inc
  tcg: Add tcg_out_tb_start backend hook
  tcg/ppc: Reinterpret tb-relative to TB+4
  tcg/ppc: Use ADDPCIS in tcg_out_tb_start
  tcg/ppc: Use ADDPCIS in tcg_out_movi_int
  tcg/ppc: Use ADDPCIS for the constant pool
  tcg/ppc: Use ADDPCIS in tcg_out_goto_tb
  tcg/ppc: Use PADDI in tcg_out_movi
  tcg/ppc: Use prefixed instructions in tcg_out_mem_long
  tcg/ppc: Use PLD in tcg_out_movi for constant pool
  tcg/ppc: Use prefixed instructions in tcg_out_dupi_vec
  tcg/ppc: Use PLD in tcg_out_goto_tb
  RFC tcg/ppc: Disable TCG_REG_TB for Power9/Power10

 tcg/tcg.c                        |   3 +
 tcg/aarch64/tcg-target.c.inc     |   5 +
 tcg/arm/tcg-target.c.inc         |   5 +
 tcg/i386/tcg-target.c.inc        |   5 +
 tcg/loongarch64/tcg-target.c.inc |   5 +
 tcg/mips/tcg-target.c.inc        |   5 +
 tcg/ppc/tcg-target.c.inc         | 280 ++++++++++++++++++++++++++-----
 tcg/riscv/tcg-target.c.inc       |   5 +
 tcg/s390x/tcg-target.c.inc       |   5 +
 tcg/sparc64/tcg-target.c.inc     |   5 +
 tcg/tci/tcg-target.c.inc         |   5 +
 11 files changed, 288 insertions(+), 40 deletions(-)

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2.34.1