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from 975bb17e2f6 So another constant synthesis improvement. new 6ffea3e3738 RISC-V: Document -mcmodel=large new 8c7cee80eb5 [RISC-V] Add support for _Bfloat16

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Summary of changes: gcc/config/riscv/iterators.md | 2 + gcc/config/riscv/riscv-builtins.cc | 16 +++++ gcc/config/riscv/riscv-modes.def | 3 + gcc/config/riscv/riscv.cc | 64 +++++++++++------ gcc/config/riscv/riscv.md | 24 +++---- gcc/doc/invoke.texi | 7 +- gcc/testsuite/gcc.target/riscv/bf16_arithmetic.c | 42 +++++++++++ gcc/testsuite/gcc.target/riscv/bf16_call.c | 12 ++++ gcc/testsuite/gcc.target/riscv/bf16_comparison.c | 36 ++++++++++ .../gcc.target/riscv/bf16_float_libcall_convert.c | 57 +++++++++++++++ .../riscv/bf16_integer_libcall_convert.c | 81 ++++++++++++++++++++++ libgcc/config/riscv/sfp-machine.h | 3 + libgcc/config/riscv/t-softfp32 | 10 ++- libgcc/config/riscv/t-softfp64 | 3 +- libgcc/soft-fp/{floatdibf.c => floatsibf.c} | 8 +-- libgcc/soft-fp/{floatdibf.c => floatunsibf.c} | 8 +-- 16 files changed, 331 insertions(+), 45 deletions(-) create mode 100644 gcc/testsuite/gcc.target/riscv/bf16_arithmetic.c create mode 100644 gcc/testsuite/gcc.target/riscv/bf16_call.c create mode 100644 gcc/testsuite/gcc.target/riscv/bf16_comparison.c create mode 100644 gcc/testsuite/gcc.target/riscv/bf16_float_libcall_convert.c create mode 100644 gcc/testsuite/gcc.target/riscv/bf16_integer_libcall_convert.c copy libgcc/soft-fp/{floatdibf.c => floatsibf.c} (89%) copy libgcc/soft-fp/{floatdibf.c => floatunsibf.c} (89%)