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Diffstat (limited to 'arch/riscv/cpu/cpu.c')
-rw-r--r-- | arch/riscv/cpu/cpu.c | 22 |
1 files changed, 16 insertions, 6 deletions
diff --git a/arch/riscv/cpu/cpu.c b/arch/riscv/cpu/cpu.c index 8445c58..ecfefa1 100644 --- a/arch/riscv/cpu/cpu.c +++ b/arch/riscv/cpu/cpu.c @@ -49,14 +49,24 @@ static inline bool supports_extension(char ext) } if (!cpu_get_desc(dev, desc, sizeof(desc))) { /* - * skip the first 4 characters (rv32|rv64) and - * check until underscore + * skip the first 4 characters (rv32|rv64) */ for (i = 4; i < sizeof(desc); i++) { - if (desc[i] == '_' || desc[i] == '\0') - break; - if (desc[i] == ext) - return true; + switch (desc[i]) { + case 's': + case 'x': + case 'z': + case '_': + case '\0': + /* + * Any of these characters mean the single + * letter extensions have all been consumed. + */ + return false; + default: + if (desc[i] == ext) + return true; + } } } |