This reverts commit 7eab365219 and fixes
the pattern rule requirement "% must match a non-empty stem" to match at
least '.' in the pattern.
This whole file could actually be substantially simplified to just:
%.$(SUFFIX): %.c
$(CC) $(CFLAGS) -c $< -o $(@F)
%.$(PSUFFIX): %.c
$(CC) $(PFLAGS) -c $< -o $(@F)
if desired to entirely avoid the copy-paste duplication, but the net
effect is the same.
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This adds all the relevant bits and pieces to add a `shgemv` path as
well as a future `hgemm`/`hgemv` path in a similar model to `sb` and `b`
interfaces.
I've also fixed a few bits and pieces around `shgemm` which didn't build
in a few situations.
There were a couple of issues with the detection code used to check
for RVV 1.0 on kernels that do not support hwprobe.
1. The vtype clobber was missing
2. The wrong form of vsetvli was being used. The vsetvli x0, x0 form
is inappropriate for this use case as it can only be safely used
in code where the value of vtype is known. The use of vsetvli
x0, x0 here can lead to a failure to detect RVV 1.0, if,
for example, the vill bit happens to be set before
detect_riscv64_rvv100 is called.
We fix both issues by adding the missing clobber and replacing the
first parameter to vsetvli with t0 (which we add to our clobbers).
Ludovic Henry