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tcg: Implement gvec support for rotate by immediate

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No host backend support yet, but the interfaces for rotli
are in place.  Canonicalize immediate rotate to the left,
based on a survey of architectures, but provide both left
and right shift interfaces to the translators.

Reviewed-by: Alex Bennée <alex.bennee@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
This commit is contained in:
Richard Henderson 2020-04-19 18:01:52 -07:00
parent cccdd8c797
commit b0f7e7444c
13 changed files with 150 additions and 1 deletions
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12
tcg/tcg-op-vec.c
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@ -545,6 +545,18 @@ void tcg_gen_sari_vec(unsigned vece, TCGv_vec r, TCGv_vec a, int64_t i)
do_shifti(INDEX_op_sari_vec, vece, r, a, i);
}
void tcg_gen_rotli_vec(unsigned vece, TCGv_vec r, TCGv_vec a, int64_t i)
{
do_shifti(INDEX_op_rotli_vec, vece, r, a, i);
}
void tcg_gen_rotri_vec(unsigned vece, TCGv_vec r, TCGv_vec a, int64_t i)
{
int bits = 8 << vece;
tcg_debug_assert(i >= 0 && i < bits);
do_shifti(INDEX_op_rotli_vec, vece, r, a, -i & (bits - 1));
}
void tcg_gen_cmp_vec(TCGCond cond, unsigned vece,
TCGv_vec r, TCGv_vec a, TCGv_vec b)
{