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target/arm: Implement MVE VNEG 

Implement the MVE VNEG insn (both integer and floating point forms).

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20210617121628.20116-9-peter.maydell@linaro.org
This commit is contained in:
Peter Maydell 2021-06-17 13:15:52 +01:00
parent 59c9177338
commit 399a8c766c
4 changed files with 35 additions and 0 deletions
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6
target/arm/helper-mve.h
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@ -55,3 +55,9 @@ DEF_HELPER_FLAGS_3(mve_vabsh, TCG_CALL_NO_WG, void, env, ptr, ptr)
DEF_HELPER_FLAGS_3(mve_vabsw, TCG_CALL_NO_WG, void, env, ptr, ptr)
DEF_HELPER_FLAGS_3(mve_vfabsh, TCG_CALL_NO_WG, void, env, ptr, ptr)
DEF_HELPER_FLAGS_3(mve_vfabss, TCG_CALL_NO_WG, void, env, ptr, ptr)
DEF_HELPER_FLAGS_3(mve_vnegb, TCG_CALL_NO_WG, void, env, ptr, ptr)
DEF_HELPER_FLAGS_3(mve_vnegh, TCG_CALL_NO_WG, void, env, ptr, ptr)
DEF_HELPER_FLAGS_3(mve_vnegw, TCG_CALL_NO_WG, void, env, ptr, ptr)
DEF_HELPER_FLAGS_3(mve_vfnegh, TCG_CALL_NO_WG, void, env, ptr, ptr)
DEF_HELPER_FLAGS_3(mve_vfnegs, TCG_CALL_NO_WG, void, env, ptr, ptr)

2
target/arm/mve.decode
View File

@ -80,3 +80,5 @@ VMVN 1111 1111 1 . 11 00 00 ... 0 0101 11 . 0 ... 0 @1op_nosz
VABS 1111 1111 1 . 11 .. 01 ... 0 0011 01 . 0 ... 0 @1op
VABS_fp 1111 1111 1 . 11 .. 01 ... 0 0111 01 . 0 ... 0 @1op
VNEG 1111 1111 1 . 11 .. 01 ... 0 0011 11 . 0 ... 0 @1op
VNEG_fp 1111 1111 1 . 11 .. 01 ... 0 0111 11 . 0 ... 0 @1op

12
target/arm/mve_helper.c
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@ -294,3 +294,15 @@ DO_1OP(vabsw, 4, int32_t, DO_ABS)
/* We can do these 64 bits at a time */
DO_1OP(vfabsh, 8, uint64_t, DO_FABSH)
DO_1OP(vfabss, 8, uint64_t, DO_FABSS)
#define DO_NEG(N) (-(N))
#define DO_FNEGH(N) ((N) ^ dup_const(MO_16, 0x8000))
#define DO_FNEGS(N) ((N) ^ dup_const(MO_32, 0x80000000))
DO_1OP(vnegb, 1, int8_t, DO_NEG)
DO_1OP(vnegh, 2, int16_t, DO_NEG)
DO_1OP(vnegw, 4, int32_t, DO_NEG)
/* We can do these 64 bits at a time */
DO_1OP(vfnegh, 8, uint64_t, DO_FNEGH)
DO_1OP(vfnegs, 8, uint64_t, DO_FNEGS)

15
target/arm/translate-mve.c
View File

@ -200,6 +200,7 @@ static bool do_1op(DisasContext *s, arg_1op *a, MVEGenOneOpFn fn)
DO_1OP(VCLZ, vclz)
DO_1OP(VCLS, vcls)
DO_1OP(VABS, vabs)
DO_1OP(VNEG, vneg)
static bool trans_VREV16(DisasContext *s, arg_1op *a)
{
@ -252,3 +253,17 @@ static bool trans_VABS_fp(DisasContext *s, arg_1op *a)
}
return do_1op(s, a, fns[a->size]);
}
static bool trans_VNEG_fp(DisasContext *s, arg_1op *a)
{
static MVEGenOneOpFn * const fns[] = {
NULL,
gen_helper_mve_vfnegh,
gen_helper_mve_vfnegs,
NULL,
};
if (!dc_isar_feature(aa32_mve_fp, s)) {
return false;
}
return do_1op(s, a, fns[a->size]);
}