riscv: Support XUANTIE extended CSR save/restore during task switching #206
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This patch focuses on two XUANTIE extended CSRs: - FXCR[31]: Process 16-bit floating point numbers according to the BFloat 16 format. - UTNMODE: FP8 output can be ovf or sat mode. Introduced by XUANTIE C908X. When using, first enable CONFIG_XUANTIE_CSR_EXT, then set the 'riscv,isa' fields of dts to dynamically control whether to save/restore the corresponding CSR. For example, for FXCR, you need to add 'xtheadfxcr', and for UTNMODE, you need to add 'xtheadutnmode'. Signed-off-by: Chen Pei <[email protected]>
RevySR
approved these changes
Dec 24, 2024
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This patch focuses on two XUANTIE extended CSRs:
When using, first enable CONFIG_XUANTIE_CSR_EXT, then set the 'riscv,isa' fields of dts to dynamically control whether to save/restore the corresponding CSR. For example, for FXCR, you need to add 'xtheadfxcr', and for UTNMODE, you need to add 'xtheadutnmode'.