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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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14
accel/tcg/tcg-runtime-gvec.c
View file

@ -1444,3 +1444,17 @@ void HELPER(gvec_umax64)(void *d, void *a, void *b, uint32_t desc)
}
clear_high(d, oprsz, desc);
}
void HELPER(gvec_bitsel)(void *d, void *a, void *b, void *c, uint32_t desc)
{
intptr_t oprsz = simd_oprsz(desc);
intptr_t i;
for (i = 0; i < oprsz; i += sizeof(vec64)) {
vec64 aa = *(vec64 *)(a + i);
vec64 bb = *(vec64 *)(b + i);
vec64 cc = *(vec64 *)(c + i);
*(vec64 *)(d + i) = (bb & aa) | (cc & ~aa);
}
clear_high(d, oprsz, desc);
}

2
accel/tcg/tcg-runtime.h
View file

@ -303,3 +303,5 @@ DEF_HELPER_FLAGS_4(gvec_leu8, TCG_CALL_NO_RWG, void, ptr, ptr, ptr, i32)
DEF_HELPER_FLAGS_4(gvec_leu16, TCG_CALL_NO_RWG, void, ptr, ptr, ptr, i32)
DEF_HELPER_FLAGS_4(gvec_leu32, TCG_CALL_NO_RWG, void, ptr, ptr, ptr, i32)
DEF_HELPER_FLAGS_4(gvec_leu64, TCG_CALL_NO_RWG, void, ptr, ptr, ptr, i32)
DEF_HELPER_FLAGS_5(gvec_bitsel, TCG_CALL_NO_RWG, void, ptr, ptr, ptr, ptr, i32)