lavc/flacdsp: fix sign extension in R-V V wasted33

We need to use either VWCVT.X.X.V or VSEXT.VF2. The later is preferable to avoid changing VTYPE.

Rémi Denis-Courmont committed 2 years ago

Commit c3dbbb31 parent 5939f721 file · +2 −3Browse files

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         ret
 2:      // Pessimistic case: wasted >= 32
-        vsetvli      t0, a3, e32, m4, ta, ma
+        vsetvli      t0, a3, e64, m8, ta, ma
         vle32.v      v8, (a1)
         sub          a3, a3, t0
-        vwcvtu.x.x.v v16, v8
+        vsext.vf2    v16, v8
         sh2add       a1, t0, a1
-        vsetvli      zero, zero, e64, m8, ta, ma
         vsll.vx      v16, v16, a2
         vse64.v      v16, (a0)
         sh3add       a0, t0, a0

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