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Diffstat (limited to 'src/rv32.tex')
| -rw-r--r-- | src/rv32.tex | 4 |
1 files changed, 1 insertions, 3 deletions
diff --git a/src/rv32.tex b/src/rv32.tex index 11cb063..e3075c8 100644 --- a/src/rv32.tex +++ b/src/rv32.tex @@ -32,9 +32,7 @@ which hold integer values. Register {\tt x0} is hardwired to the constant 0. There is no hardwired subroutine return address link register, but the standard software calling convention uses register {\tt x1} to hold the return address on a call. For RV32, the {\tt x} -registers are 32 bits wide, and for RV64, they are 64 bits wide. This -document uses the term XLEN to refer to the current width of an {\tt - x} register in bits (either 32 or 64). +registers are 32 bits wide, and for RV64, they are 64 bits wide. There is one additional user-visible register: the program counter {\tt pc} holds the address of the current instruction. |