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middle-end/110541 - VEC_PERM_EXPR documentation is off

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The following adjusts the tree.def documentation about VEC_PERM_EXPR
which wasn't adjusted when the restrictions of permutes with constant
mask were relaxed.

	PR middle-end/110541
	* tree.def (VEC_PERM_EXPR): Adjust documentation to reflect
	reality.
This commit is contained in:
Richard Biener 2023-07-05 08:53:01 +02:00
parent 2d11c99dfc
commit 9fed1ec67f
1 changed files with 11 additions and 6 deletions
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17
gcc/tree.def
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@ -565,13 +565,18 @@ DEFTREECODE (VEC_COND_EXPR, "vec_cond_expr", tcc_expression, 3)
N = length(mask)
foreach i in N:
M = mask[i] % (2*N)
A = M < N ? v0[M] : v1[M-N]
M = mask[i] % (length(v0) + length(v1))
A[i] = M < length(v0) ? v0[M] : v1[M - length(v0)]
V0 and V1 are vectors of the same type. MASK is an integer-typed
vector. The number of MASK elements must be the same with the
number of elements in V0 and V1. The size of the inner type
of the MASK and of the V0 and V1 must be the same.
V0 and V1 are vectors of the same type.
When MASK is not constant:
MASK is an integer-typed vector. The number of MASK elements must
be the same as the number of elements in V0 and V1. The size of
the inner type of the MASK and of the V0 and V1 must be the same.
When MASK is constant:
MASK is an integer-typed vector.
*/
DEFTREECODE (VEC_PERM_EXPR, "vec_perm_expr", tcc_expression, 3)