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[Qemu-devel] [PATCH v3 0/7] TriCore FPU patches

From: Bastian Koppelmann
Subject: [Qemu-devel] [PATCH v3 0/7] TriCore FPU patches
Date: Wed, 9 Mar 2016 11:42:09 +0100


this patch-series adds the inital infrastructure for FPU instructions and adds
the first few: add, sub, mul, div, cmp, ftoi, and itof. Patch [02/07] moves
the general CHECK_REG_PAIR to each single instruction since add.f and sub.f
do not use 64-bit registers and would generate a false exception.


v2 -> v3:
    - substitute f_get_excp_flags() with get_float_exception_flags() for 
    - remove float32_squash_input_denormal() for fadd/fsub/fmul/fdiv
    - remove f_get_excp_flags(), which used a magic number
    - f_update_psw_flags() now computes FPU_FS conditionally 
    - remove double check on float_flag_invalid in f_update_psw_flags()

v1 -> v2:
    - ftoi/itof now use f_update_psw_flags to update exception flags
    - fcmp now uses float32_compare_quiet instead of doing it by hand
    - fcmp now uses f_update_psw_flags to set excp flags 
    - Make exceptional case exceptional for fadd/fsub/fmul/fdiv
    - switch arg1 and arg2 in float32_##op() since sub would otherwise
      produce false results
    - add TriCore to softfloat-specialize.h
    - add fpu_set_state() which sets fpu config on psw_write() and cpu_reset
    - add f_get_excp_flags which is used to ignore input_denormal flag

Bastian Koppelmann (7):
  target-tricore: Add FPU infrastructure
  target-tricore: Move general CHECK_REG_PAIR of decode_rrr_divide
  target-tricore: add add.f/sub.f instructions
  target-tricore: Add mul.f instruction
  target-tricore: Add div.f instruction
  target-tricore: Add cmp.f instruction
  target-tricore: Add ftoi and itof instructions

 fpu/softfloat-specialize.h       |   2 +-
 target-tricore/Makefile.objs     |   2 +-
 target-tricore/cpu.h             |   6 +-
 target-tricore/fpu_helper.c      | 215 +++++++++++++++++++++++++++++++++++++++
 target-tricore/helper.c          |  10 ++
 target-tricore/helper.h          |   7 ++
 target-tricore/translate.c       |  32 +++++-
 target-tricore/tricore-opcodes.h |  18 ++++
 8 files changed, 286 insertions(+), 6 deletions(-)
 create mode 100644 target-tricore/fpu_helper.c


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