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| author | Andrew Waterman <andrew@sifive.com> | 2019-09-06 15:08:09 -0700 |
|---|---|---|
| committer | Andrew Waterman <andrew@sifive.com> | 2019-09-06 15:08:09 -0700 |
| commit | 5e8bf5c789cc8a0deb909b2a65c66b7dec673940 (patch) | |
| tree | 7ddcabfe7cf6f603ccde8997396868e59d016c20 /src/rv32.tex | |
| parent | fb2ea70991e94771ee9824a0a110a07d95186214 (diff) | |
| download | riscv-isa-manual-5e8bf5c789cc8a0deb909b2a65c66b7dec673940.zip riscv-isa-manual-5e8bf5c789cc8a0deb909b2a65c66b7dec673940.tar.gz riscv-isa-manual-5e8bf5c789cc8a0deb909b2a65c66b7dec673940.tar.bz2 | |
Remove outdated commentary
There's no reason for simple pedagogical implementations to trap
FENCE; they can probably just execute it as a NOP. (In situations
where that statement is false, the implementation isn't simple!)
I think the sentence was written with FENCE.I in mind, but since that
instruction has been moved to an extension, the sentence doesn't apply
in this context anymore.
Diffstat (limited to 'src/rv32.tex')
| -rw-r--r-- | src/rv32.tex | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/src/rv32.tex b/src/rv32.tex index ba8e169..233109a 100644 --- a/src/rv32.tex +++ b/src/rv32.tex @@ -22,7 +22,7 @@ Subsets of the base integer ISA might be useful for pedagogical purposes, but the base has been defined such that there should be little incentive to subset a real hardware implementation beyond omitting support for misaligned memory accesses and treating all -SYSTEM and FENCE instructions as a single trap. +SYSTEM instructions as a single trap. \end{commentary} \begin{commentary} |