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Diffstat (limited to 'src/rv32e.adoc')
| -rw-r--r-- | src/rv32e.adoc | 10 |
1 files changed, 5 insertions, 5 deletions
diff --git a/src/rv32e.adoc b/src/rv32e.adoc index dca0858..ac6e74f 100644 --- a/src/rv32e.adoc +++ b/src/rv32e.adoc @@ -6,7 +6,7 @@ instruction sets, designed for microcontrollers in embedded systems. RV32E and RV64E are reduced versions of RV32I and RV64I, respectively: the only change is to reduce the number of integer registers to 16. This chapter only outlines the differences between RV32E/RV64E and -RV32I/RV64I, and so should be read after Chapters<<rv32>> and +RV32I/RV64I, and so should be read after <<rv32>> and <<rv64>>. (((RV32E, design))) [NOTE] @@ -23,7 +23,7 @@ RV64I are also compatible with RV32E and RV64E, respectively. === RV32E and RV64E Programmers’ Model RV32E and RV64E reduce the integer register count to 16 general-purpose -registers, (`x-0x15`), where `x0` is a dedicated zero register. +registers, ('x0-x15'), where 'x0' is a dedicated zero register. [TIP] ==== @@ -37,13 +37,13 @@ corresponding core power reduction. (((RV32E, difference from RV32I))) RV32E and RV64E use the same instruction-set encoding as RV32I and RV64I -respectively, except that only registers `x0-x15` are provided. All -encodings specifying the other registers `x16-x31` are reserved. +respectively, except that only registers 'x0-x15' are provided. All +encodings specifying the other registers 'x16-x31' are reserved. [NOTE] ==== The previous draft of this chapter made all encodings using the -` x16-x31` registers available as custom. This version takes a more +'x16-x31' registers available as custom. This version takes a more conservative approach, making these reserved so that they can be allocated between custom space or new standard encodings at a later date. |