Hi,
I think the PseudoOps.txt has a bug in the instructions below, where rd register should be replaced by RG1 register, according to:

rdcycle t1 ; csrrs RG1, 0xC00, x0 ;# Read from cycle
rdtime t1 ; csrrs RG1, 0xC01, x0 ;# Read from time
rdinstret t1 ; csrrs RG1, 0xC02, x0 ;# Read from instret
rdcycleh t1 ; csrrs RG1, 0xC80, x0 ;# Read from cycleh
rdtimeh t1 ; csrrs RG1, 0xC81, x0 ;# Read from timeh
rdinstreth t1 ; csrrs RG1, 0xC82, x0 ;# Read from instreth

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Marcus Vinicius