[v4,00/22] target/xtensa: implement double precision FPU

Message

Max Filippov July 11, 2020, 11:06 a.m. UTC

Hello,

this series implements double precision floating point unit option for
target/xtensa, updates FPU tests and adds two new CPU cores, one with
FPU2000 option and one with DFPU option.

It is tagged xtensa-5.1-dfp-v4 in the qemu-xtensa tree at
git://github.com/OSLL/qemu-xtensa.git

I don't post the last two patches as they are too big for the list,
they can be found in the git tree mentioned above.

Changes v3->v4:
- split DFPU option addition into a separate patch, change DFP unit
  detection logic
- avoid calling set_use_first_nan on every FPU operation in FPU2000
  and single-precision only DFPU configurations

Changes v2->v3:
- handle infzero case in pickNaNMulAdd properly and reword commit
  message
- add more infzero tests for FPU2000 and DFPU
- fix test names in test_dfp0_arith.S
- add licenses to newly imported cores
- rename DE_233L_FPU to de233_fpu to be more consistent with other
  core names

Changes v1->v2:
- use inline function for no_signaling_nans property to allow for
  constant folding on architectures that have this property fixed.

Max Filippov (22):
  softfloat: make NO_SIGNALING_NANS runtime property
  softfloat: pass float_status pointer to pickNaN
  softfloat: add xtensa specialization for pickNaNMulAdd
  target/xtensa: add geometry to xtensa_get_regfile_by_name
  target/xtensa: support copying registers up to 64 bits wide
  target/xtensa: rename FPU2000 translators and helpers
  target/xtensa: move FSR/FCR register accessors
  target/xtensa: don't access BR regfile directly
  target/xtensa: add DFPU option
  target/xtensa: add DFPU registers and opcodes
  target/xtensa: implement FPU division and square root
  tests/tcg/xtensa: fix test execution on ISS
  tests/tcg/xtensa: update test_fp0_arith for DFPU
  tests/tcg/xtensa: expand madd tests
  tests/tcg/xtensa: update test_fp0_conv for DFPU
  tests/tcg/xtensa: update test_fp1 for DFPU
  tests/tcg/xtensa: update test_lsc for DFPU
  tests/tcg/xtensa: add fp0 div and sqrt tests
  tests/tcg/xtensa: test double precision load/store
  tests/tcg/xtensa: add DFP0 arithmetic tests
  target/xtensa: import de233_fpu core
  target/xtensa: import DSP3400 core

 fpu/softfloat-specialize.inc.c                |    285 +-
 fpu/softfloat.c                               |      2 +-
 include/fpu/softfloat-helpers.h               |     10 +
 include/fpu/softfloat-types.h                 |      8 +-
 target/xtensa/Makefile.objs                   |      2 +
 target/xtensa/core-de233_fpu.c                |     58 +
 target/xtensa/core-de233_fpu/core-isa.h       |    727 +
 target/xtensa/core-de233_fpu/core-matmap.h    |    717 +
 target/xtensa/core-de233_fpu/gdb-config.inc.c |    277 +
 .../core-de233_fpu/xtensa-modules.inc.c       |  20758 ++
 target/xtensa/core-dsp3400.c                  |     58 +
 target/xtensa/core-dsp3400/core-isa.h         |    452 +
 target/xtensa/core-dsp3400/core-matmap.h      |    312 +
 target/xtensa/core-dsp3400/gdb-config.inc.c   |    400 +
 .../xtensa/core-dsp3400/xtensa-modules.inc.c  | 171906 +++++++++++++++
 target/xtensa/cpu.c                           |      5 +
 target/xtensa/cpu.h                           |      8 +-
 target/xtensa/fpu_helper.c                    |    342 +-
 target/xtensa/helper.c                        |      4 +-
 target/xtensa/helper.h                        |     58 +-
 target/xtensa/overlay_tool.h                  |     24 +
 target/xtensa/translate.c                     |   1437 +-
 tests/tcg/xtensa/fpu.h                        |    142 +
 tests/tcg/xtensa/macros.inc                   |     10 +-
 tests/tcg/xtensa/test_dfp0_arith.S            |    162 +
 tests/tcg/xtensa/test_fp0_arith.S             |    282 +-
 tests/tcg/xtensa/test_fp0_conv.S              |    299 +-
 tests/tcg/xtensa/test_fp0_div.S               |     82 +
 tests/tcg/xtensa/test_fp0_sqrt.S              |     76 +
 tests/tcg/xtensa/test_fp1.S                   |     62 +-
 tests/tcg/xtensa/test_lsc.S                   |    170 +-
 31 files changed, 198581 insertions(+), 554 deletions(-)
 create mode 100644 target/xtensa/core-de233_fpu.c
 create mode 100644 target/xtensa/core-de233_fpu/core-isa.h
 create mode 100644 target/xtensa/core-de233_fpu/core-matmap.h
 create mode 100644 target/xtensa/core-de233_fpu/gdb-config.inc.c
 create mode 100644 target/xtensa/core-de233_fpu/xtensa-modules.inc.c
 create mode 100644 target/xtensa/core-dsp3400.c
 create mode 100644 target/xtensa/core-dsp3400/core-isa.h
 create mode 100644 target/xtensa/core-dsp3400/core-matmap.h
 create mode 100644 target/xtensa/core-dsp3400/gdb-config.inc.c
 create mode 100644 target/xtensa/core-dsp3400/xtensa-modules.inc.c
 create mode 100644 tests/tcg/xtensa/fpu.h
 create mode 100644 tests/tcg/xtensa/test_dfp0_arith.S
 create mode 100644 tests/tcg/xtensa/test_fp0_div.S
 create mode 100644 tests/tcg/xtensa/test_fp0_sqrt.S