Unverified Commit 35bc1883 authored by Inochi Amaoto's avatar Inochi Amaoto Committed by Alexandre Ghiti
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dt-bindings: riscv: add bfloat16 ISA extension description 



Add description for the BFloat16 precision Floating-Point ISA extension,
(Zfbfmin, Zvfbfmin, Zvfbfwma). which was ratified in commit 4dc23d62
("Added Chapter title to BF16") of the riscv-isa-manual.

Signed-off-by: default avatarInochi Amaoto <inochiama@gmail.com>
Acked-by: default avatarConor Dooley <conor.dooley@microchip.com>
Link: https://lore.kernel.org/r/20250213003849.147358-2-inochiama@gmail.com


Signed-off-by: default avatarAlexandre Ghiti <alexghiti@rivosinc.com>
parent 75ad0231

Documentation/devicetree/bindings/riscv/extensions.yaml

+45 −0
Original line number Diff line number Diff line
@@ -329,6 +329,12 @@ properties: 
            instructions, as ratified in commit 056b6ff ("Zfa is ratified") of

            riscv-isa-manual.



        - const: zfbfmin

          description:

            The standard Zfbfmin extension which provides minimal support for

            16-bit half-precision brain floating-point instructions, as ratified

            in commit 4dc23d62 ("Added Chapter title to BF16") of riscv-isa-manual.



        - const: zfh

          description:

            The standard Zfh extension for 16-bit half-precision binary
@@ -525,6 +531,18 @@ properties: 
            in commit 6f702a2 ("Vector extensions are now ratified") of

            riscv-v-spec.



        - const: zvfbfmin

          description:

            The standard Zvfbfmin extension for minimal support for vectored

            16-bit half-precision brain floating-point instructions, as ratified

            in commit 4dc23d62 ("Added Chapter title to BF16") of riscv-isa-manual.



        - const: zvfbfwma

          description:

            The standard Zvfbfwma extension for vectored half-precision brain

            floating-point widening multiply-accumulate instructions, as ratified

            in commit 4dc23d62 ("Added Chapter title to BF16") of riscv-isa-manual.



        - const: zvfh

          description:

            The standard Zvfh extension for vectored half-precision
@@ -663,6 +681,33 @@ properties: 
        then:

          contains:

            const: zca

      # Zfbfmin depends on F

      - if:

          contains:

            const: zfbfmin

        then:

          contains:

            const: f

      # Zvfbfmin depends on V or Zve32f

      - if:

          contains:

            const: zvfbfmin

        then:

          oneOf:

            - contains:

                const: v

            - contains:

                const: zve32f

      # Zvfbfwma depends on Zfbfmin and Zvfbfmin

      - if:

          contains:

            const: zvfbfwma

        then:

          allOf:

            - contains:

                const: zfbfmin

            - contains:

                const: zvfbfmin



allOf:

  # Zcf extension does not exist on rv64