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8 bit floating point#1910

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rbuchner-aril wants to merge 19 commits intoriscv-software-src:masterriscv-software-src/riscv-isa-sim:masterfrom rbuchner-aril:rbuchner/FP8rbuchner-aril/riscv-isa-sim:rbuchner/FP8Copy head branch name to clipboard

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Commits on Feb 7, 2025

• Implement f8_to_f16 and f16_to_f8 conversion functions

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• Implement F8 multiply

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  rbuchner-aril

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• Extract logic for emulating f8 function using f16 from f8_mul into f8_emulation module

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• Implement f8_sqrt, f8_rsqrte7, f8_recip7 in softfloat

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• Implement f8_div in softfloat

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• Implement f8_add/f8_sub in softfloat

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• Implement f8_madd instruction in softfloat

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• Implement f8_to_(u)i16 in softfloat

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• Implement f8_to_(u)i8 in softfloat

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• Implement (u)i32_to_f8 in softfloat

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• Update vector FP classify to support FP8

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• Implement F8 min/max

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• Implement f8 comparsion functions

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• Add thread local softfloat_fp8Mode variable to control the 8 bit floating point format

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• Extract expF8UI and fracF8UI based on fp8Mode

  

  Omar Almatov

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• (1/4) Add OCP e4m3 and e5m2 to list of f8 modes

  

  Omar Almatov

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  rbuchner-aril

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• (2/4) Add macros to support new OCP f8 modes

  

  Omar Almatov

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• (3/4) Support e4m3/e5m2 modes in f8 to f16 conversion

  

  Omar Almatov

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  rbuchner-aril

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• (4/4) Support e4m3/e5m2 modes in f16 to f8 conversion

  

  Omar Almatov

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