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tcg: Add support for vector bitwise select

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This operation performs d = (b & a) | (c & ~a), and is present
on a majority of host vector units.  Include gvec expanders.

Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
This commit is contained in:
Richard Henderson 2019-04-30 11:02:23 -07:00
parent 532ba368a1
commit 38dc12947e
12 changed files with 86 additions and 0 deletions
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23
tcg/tcg-op-gvec.c
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@ -3195,3 +3195,26 @@ void tcg_gen_gvec_cmp(TCGCond cond, unsigned vece, uint32_t dofs,
expand_clr(dofs + oprsz, maxsz - oprsz);
}
}
static void tcg_gen_bitsel_i64(TCGv_i64 d, TCGv_i64 a, TCGv_i64 b, TCGv_i64 c)
{
TCGv_i64 t = tcg_temp_new_i64();
tcg_gen_and_i64(t, b, a);
tcg_gen_andc_i64(d, c, a);
tcg_gen_or_i64(d, d, t);
tcg_temp_free_i64(t);
}
void tcg_gen_gvec_bitsel(unsigned vece, uint32_t dofs, uint32_t aofs,
uint32_t bofs, uint32_t cofs,
uint32_t oprsz, uint32_t maxsz)
{
static const GVecGen4 g = {
.fni8 = tcg_gen_bitsel_i64,
.fniv = tcg_gen_bitsel_vec,
.fno = gen_helper_gvec_bitsel,
};
tcg_gen_gvec_4(dofs, aofs, bofs, cofs, oprsz, maxsz, &g);
}