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| author | John Hauser <31252952+jhauser-us@users.noreply.github.com> | 2021-08-13 14:13:29 -0700 |
|---|---|---|
| committer | GitHub <noreply@github.com> | 2021-08-13 14:13:29 -0700 |
| commit | 7d0006ed81cfab6a4a09578e91e238e88b1b4b62 (patch) | |
| tree | 6111736a693fe9ba21ce8f0e7d28754ba1fac6bc /src/machine.tex | |
| parent | 06ec2b2e3698b20b08446ec0bf84df85d8b9debf (diff) | |
| download | riscv-isa-manual-7d0006ed81cfab6a4a09578e91e238e88b1b4b62.zip riscv-isa-manual-7d0006ed81cfab6a4a09578e91e238e88b1b4b62.tar.gz riscv-isa-manual-7d0006ed81cfab6a4a09578e91e238e88b1b4b62.tar.bz2 | |
Clarify when mstatus.FS may be hardwired zero (#707)
Diffstat (limited to 'src/machine.tex')
| -rw-r--r-- | src/machine.tex | 8 |
1 files changed, 5 insertions, 3 deletions
diff --git a/src/machine.tex b/src/machine.tex index c231534..4618eef 100644 --- a/src/machine.tex +++ b/src/machine.tex @@ -916,10 +916,12 @@ Status & FS Meaning & XS Meaning\\ \end{table*} If the F extension is implemented, the FS field shall not be -hardwired to zero, regardless of the setting of {\tt misa}.F. +hardwired to zero. -If neither S-mode nor the F extension is implemented, the FS -field shall be hardwired to zero. +If neither the F extension nor S-mode is implemented, then FS is +hardwired to zero. +If S-mode is implemented but the F extension is not, FS may optionally +be hardwired to zero. \begin{commentary} Implementations with S-mode but without the F extension are |