Richard Henderson <richard.hender...@linaro.org> writes:
> These instructions shift left or right depending on the sign
> of the input, and 7 bits are significant to the shift. This
> requires several masks and selects in addition to the actual
> shifts to form the complete answer.
>
> That said, the operation is still a small improvement even for
> two 64-bit elements -- 13 vector operations instead of 2 * 7
> integer operations.
>
> Signed-off-by: Richard Henderson <richard.hender...@linaro.org>
> ---
> v2: Fix operand ordering for aa32 VSHL.
> ---
> target/arm/helper.h | 11 +-
> target/arm/translate.h | 6 +
> target/arm/neon_helper.c | 33 ----
> target/arm/translate-a64.c | 18 +--
> target/arm/translate.c | 301 +++++++++++++++++++++++++++++++++++--
> target/arm/vec_helper.c | 88 +++++++++++
> 6 files changed, 391 insertions(+), 66 deletions(-)
>
> diff --git a/target/arm/helper.h b/target/arm/helper.h
> index 1fb2cb5a77..fc0d594a14 100644
> --- a/target/arm/helper.h
> +++ b/target/arm/helper.h
> @@ -296,14 +296,8 @@ DEF_HELPER_2(neon_abd_s16, i32, i32, i32)
> DEF_HELPER_2(neon_abd_u32, i32, i32, i32)
> DEF_HELPER_2(neon_abd_s32, i32, i32, i32)
>
> -DEF_HELPER_2(neon_shl_u8, i32, i32, i32)
> -DEF_HELPER_2(neon_shl_s8, i32, i32, i32)
> DEF_HELPER_2(neon_shl_u16, i32, i32, i32)
> DEF_HELPER_2(neon_shl_s16, i32, i32, i32)
> -DEF_HELPER_2(neon_shl_u32, i32, i32, i32)
> -DEF_HELPER_2(neon_shl_s32, i32, i32, i32)
> -DEF_HELPER_2(neon_shl_u64, i64, i64, i64)
> -DEF_HELPER_2(neon_shl_s64, i64, i64, i64)
> DEF_HELPER_2(neon_rshl_u8, i32, i32, i32)
> DEF_HELPER_2(neon_rshl_s8, i32, i32, i32)
> DEF_HELPER_2(neon_rshl_u16, i32, i32, i32)
> @@ -690,6 +684,11 @@ DEF_HELPER_FLAGS_2(frint64_s, TCG_CALL_NO_RWG, f32, f32,
> ptr)
> DEF_HELPER_FLAGS_2(frint32_d, TCG_CALL_NO_RWG, f64, f64, ptr)
> DEF_HELPER_FLAGS_2(frint64_d, TCG_CALL_NO_RWG, f64, f64, ptr)
>
> +DEF_HELPER_FLAGS_4(gvec_sshl_b, TCG_CALL_NO_RWG, void, ptr, ptr, ptr, i32)
> +DEF_HELPER_FLAGS_4(gvec_sshl_h, TCG_CALL_NO_RWG, void, ptr, ptr, ptr, i32)
> +DEF_HELPER_FLAGS_4(gvec_ushl_b, TCG_CALL_NO_RWG, void, ptr, ptr, ptr, i32)
> +DEF_HELPER_FLAGS_4(gvec_ushl_h, TCG_CALL_NO_RWG, void, ptr, ptr, ptr, i32)
> +
> #ifdef TARGET_AARCH64
> #include "helper-a64.h"
> #include "helper-sve.h"
> diff --git a/target/arm/translate.h b/target/arm/translate.h
> index dd24f91f26..0c4e6e4bbd 100644
> --- a/target/arm/translate.h
> +++ b/target/arm/translate.h
> @@ -274,6 +274,8 @@ uint64_t vfp_expand_imm(int size, uint8_t imm8);
> extern const GVecGen3 mla_op[4];
> extern const GVecGen3 mls_op[4];
> extern const GVecGen3 cmtst_op[4];
> +extern const GVecGen3 sshl_op[4];
> +extern const GVecGen3 ushl_op[4];
> extern const GVecGen2i ssra_op[4];
> extern const GVecGen2i usra_op[4];
> extern const GVecGen2i sri_op[4];
> @@ -283,6 +285,10 @@ extern const GVecGen4 sqadd_op[4];
> extern const GVecGen4 uqsub_op[4];
> extern const GVecGen4 sqsub_op[4];
> void gen_cmtst_i64(TCGv_i64 d, TCGv_i64 a, TCGv_i64 b);
> +void gen_ushl_i32(TCGv_i32 d, TCGv_i32 a, TCGv_i32 b);
> +void gen_sshl_i32(TCGv_i32 d, TCGv_i32 a, TCGv_i32 b);
> +void gen_ushl_i64(TCGv_i64 d, TCGv_i64 a, TCGv_i64 b);
> +void gen_sshl_i64(TCGv_i64 d, TCGv_i64 a, TCGv_i64 b);
>
> /*
> * Forward to the isar_feature_* tests given a DisasContext pointer.
> diff --git a/target/arm/neon_helper.c b/target/arm/neon_helper.c
> index 4259056723..c581ffb7d3 100644
> --- a/target/arm/neon_helper.c
> +++ b/target/arm/neon_helper.c
> @@ -615,24 +615,9 @@ NEON_VOP(abd_u32, neon_u32, 1)
> } else { \
> dest = src1 << tmp; \
> }} while (0)
> -NEON_VOP(shl_u8, neon_u8, 4)
> NEON_VOP(shl_u16, neon_u16, 2)
> -NEON_VOP(shl_u32, neon_u32, 1)
> #undef NEON_FN
>
> -uint64_t HELPER(neon_shl_u64)(uint64_t val, uint64_t shiftop)
> -{
> - int8_t shift = (int8_t)shiftop;
> - if (shift >= 64 || shift <= -64) {
> - val = 0;
> - } else if (shift < 0) {
> - val >>= -shift;
> - } else {
> - val <<= shift;
> - }
> - return val;
> -}
> -
> #define NEON_FN(dest, src1, src2) do { \
> int8_t tmp; \
> tmp = (int8_t)src2; \
> @@ -645,27 +630,9 @@ uint64_t HELPER(neon_shl_u64)(uint64_t val, uint64_t
> shiftop)
> } else { \
> dest = src1 << tmp; \
> }} while (0)
> -NEON_VOP(shl_s8, neon_s8, 4)
> NEON_VOP(shl_s16, neon_s16, 2)
> -NEON_VOP(shl_s32, neon_s32, 1)
> #undef NEON_FN
>
> -uint64_t HELPER(neon_shl_s64)(uint64_t valop, uint64_t shiftop)
> -{
> - int8_t shift = (int8_t)shiftop;
> - int64_t val = valop;
> - if (shift >= 64) {
> - val = 0;
> - } else if (shift <= -64) {
> - val >>= 63;
> - } else if (shift < 0) {
> - val >>= -shift;
> - } else {
> - val <<= shift;
> - }
> - return val;
> -}
> -
> #define NEON_FN(dest, src1, src2) do { \
> int8_t tmp; \
> tmp = (int8_t)src2; \
> diff --git a/target/arm/translate-a64.c b/target/arm/translate-a64.c
> index 2d6cd09634..255a168df6 100644
> --- a/target/arm/translate-a64.c
> +++ b/target/arm/translate-a64.c
> @@ -8685,9 +8685,9 @@ static void handle_3same_64(DisasContext *s, int
> opcode, bool u,
> break;
> case 0x8: /* SSHL, USHL */
> if (u) {
> - gen_helper_neon_shl_u64(tcg_rd, tcg_rn, tcg_rm);
> + gen_ushl_i64(tcg_rd, tcg_rn, tcg_rm);
> } else {
> - gen_helper_neon_shl_s64(tcg_rd, tcg_rn, tcg_rm);
> + gen_sshl_i64(tcg_rd, tcg_rn, tcg_rm);
> }
> break;
> case 0x9: /* SQSHL, UQSHL */
> @@ -11082,6 +11082,10 @@ static void disas_simd_3same_int(DisasContext *s,
> uint32_t insn)
> is_q ? 16 : 8, vec_full_reg_size(s),
> (u ? uqsub_op : sqsub_op) + size);
> return;
> + case 0x08: /* SSHL, USHL */
> + gen_gvec_op3(s, is_q, rd, rn, rm,
> + u ? &ushl_op[size] : &sshl_op[size]);
> + return;
> case 0x0c: /* SMAX, UMAX */
> if (u) {
> gen_gvec_fn3(s, is_q, rd, rn, rm, tcg_gen_gvec_umax, size);
> @@ -11197,16 +11201,6 @@ static void disas_simd_3same_int(DisasContext *s,
> uint32_t insn)
> genfn = fns[size][u];
> break;
> }
> - case 0x8: /* SSHL, USHL */
> - {
> - static NeonGenTwoOpFn * const fns[3][2] = {
> - { gen_helper_neon_shl_s8, gen_helper_neon_shl_u8 },
> - { gen_helper_neon_shl_s16, gen_helper_neon_shl_u16 },
> - { gen_helper_neon_shl_s32, gen_helper_neon_shl_u32 },
> - };
> - genfn = fns[size][u];
> - break;
> - }
> case 0x9: /* SQSHL, UQSHL */
> {
> static NeonGenTwoOpEnvFn * const fns[3][2] = {
> diff --git a/target/arm/translate.c b/target/arm/translate.c
> index 698c594e8c..598bb1cc00 100644
> --- a/target/arm/translate.c
> +++ b/target/arm/translate.c
> @@ -3580,13 +3580,13 @@ static inline void gen_neon_shift_narrow(int size,
> TCGv_i32 var, TCGv_i32 shift,
> if (u) {
> switch (size) {
> case 1: gen_helper_neon_shl_u16(var, var, shift); break;
> - case 2: gen_helper_neon_shl_u32(var, var, shift); break;
> + case 2: gen_ushl_i32(var, var, shift); break;
> default: abort();
> }
> } else {
> switch (size) {
> case 1: gen_helper_neon_shl_s16(var, var, shift); break;
> - case 2: gen_helper_neon_shl_s32(var, var, shift); break;
> + case 2: gen_sshl_i32(var, var, shift); break;
> default: abort();
> }
> }
> @@ -4389,6 +4389,282 @@ const GVecGen3 cmtst_op[4] = {
> .vece = MO_64 },
> };
>
> +void gen_ushl_i32(TCGv_i32 d, TCGv_i32 a, TCGv_i32 b)
nit: this would have been nicer to read if the ops where dst, src, shift
or some such.
> +{
> + TCGv_i32 lval = tcg_temp_new_i32();
> + TCGv_i32 rval = tcg_temp_new_i32();
> + TCGv_i32 lsh = tcg_temp_new_i32();
> + TCGv_i32 rsh = tcg_temp_new_i32();
> + TCGv_i32 zero = tcg_const_i32(0);
> + TCGv_i32 max = tcg_const_i32(32);
> +
> + /*
> + * Rely on the TCG guarantee that out of range shifts produce
> + * unspecified results, not undefined behaviour (i.e. no trap).
> + * Discard out-of-range results after the fact.
> + */
> + tcg_gen_ext8s_i32(lsh, b);
> + tcg_gen_neg_i32(rsh, lsh);
> + tcg_gen_shl_i32(lval, a, lsh);
> + tcg_gen_shr_i32(rval, a, rsh);
> + tcg_gen_movcond_i32(TCG_COND_LTU, d, lsh, max, lval, zero);
> + tcg_gen_movcond_i32(TCG_COND_LTU, d, rsh, max, rval, d);
Do these get dead coded away if the shift is a const?
> +
> + tcg_temp_free_i32(lval);
> + tcg_temp_free_i32(rval);
> + tcg_temp_free_i32(lsh);
> + tcg_temp_free_i32(rsh);
> + tcg_temp_free_i32(zero);
> + tcg_temp_free_i32(max);
> +}
> +
> +void gen_ushl_i64(TCGv_i64 d, TCGv_i64 a, TCGv_i64 b)
> +{
> + TCGv_i64 lval = tcg_temp_new_i64();
> + TCGv_i64 rval = tcg_temp_new_i64();
> + TCGv_i64 lsh = tcg_temp_new_i64();
> + TCGv_i64 rsh = tcg_temp_new_i64();
> + TCGv_i64 zero = tcg_const_i64(0);
> + TCGv_i64 max = tcg_const_i64(64);
> +
> + /*
> + * Rely on the TCG guarantee that out of range shifts produce
> + * unspecified results, not undefined behaviour (i.e. no trap).
> + * Discard out-of-range results after the fact.
> + */
> + tcg_gen_ext8s_i64(lsh, b);
> + tcg_gen_neg_i64(rsh, lsh);
> + tcg_gen_shl_i64(lval, a, lsh);
> + tcg_gen_shr_i64(rval, a, rsh);
> + tcg_gen_movcond_i64(TCG_COND_LTU, d, lsh, max, lval, zero);
> + tcg_gen_movcond_i64(TCG_COND_LTU, d, rsh, max, rval, d);
> +
> + tcg_temp_free_i64(lval);
> + tcg_temp_free_i64(rval);
> + tcg_temp_free_i64(lsh);
> + tcg_temp_free_i64(rsh);
> + tcg_temp_free_i64(zero);
> + tcg_temp_free_i64(max);
> +}
> +
> +static void gen_ushl_vec(unsigned vece, TCGv_vec d, TCGv_vec a, TCGv_vec b)
> +{
> + TCGv_vec lval = tcg_temp_new_vec_matching(d);
> + TCGv_vec rval = tcg_temp_new_vec_matching(d);
> + TCGv_vec lsh = tcg_temp_new_vec_matching(d);
> + TCGv_vec rsh = tcg_temp_new_vec_matching(d);
> + TCGv_vec msk, max;
> +
> + /*
> + * Rely on the TCG guarantee that out of range shifts produce
> + * unspecified results, not undefined behaviour (i.e. no trap).
> + * Discard out-of-range results after the fact.
> + */
> + tcg_gen_neg_vec(vece, rsh, b);
> + if (vece == MO_8) {
> + tcg_gen_mov_vec(lsh, b);
> + } else {
> + msk = tcg_temp_new_vec_matching(d);
> + tcg_gen_dupi_vec(vece, msk, 0xff);
> + tcg_gen_and_vec(vece, lsh, b, msk);
> + tcg_gen_and_vec(vece, rsh, rsh, msk);
> + tcg_temp_free_vec(msk);
> + }
> +
> + /*
> + * Perform possibly out of range shifts, trusting that the operation
> + * does not trap. Discard unused results after the fact.
> + */
> + tcg_gen_shlv_vec(vece, lval, a, lsh);
> + tcg_gen_shrv_vec(vece, rval, a, rsh);
> +
> + max = tcg_temp_new_vec_matching(d);
> + tcg_gen_dupi_vec(vece, max, 8 << vece);
> +
> + /*
> + * The choice of LT (signed) and GEU (unsigned) are biased toward
> + * the instructions of the x86_64 host. For MO_8, the whole byte
> + * is significant so we must use an unsigned compare; otherwise we
> + * have already masked to a byte and so a signed compare works.
> + * Other tcg hosts have a full set of comparisons and do not care.
> + */
> + if (vece == MO_8) {
> + tcg_gen_cmp_vec(TCG_COND_GEU, vece, lsh, lsh, max);
> + tcg_gen_cmp_vec(TCG_COND_GEU, vece, rsh, rsh, max);
> + tcg_gen_andc_vec(vece, lval, lval, lsh);
> + tcg_gen_andc_vec(vece, rval, rval, rsh);
> + } else {
> + tcg_gen_cmp_vec(TCG_COND_LT, vece, lsh, lsh, max);
> + tcg_gen_cmp_vec(TCG_COND_LT, vece, rsh, rsh, max);
> + tcg_gen_and_vec(vece, lval, lval, lsh);
> + tcg_gen_and_vec(vece, rval, rval, rsh);
> + }
> + tcg_gen_or_vec(vece, d, lval, rval);
> +
> + tcg_temp_free_vec(max);
> + tcg_temp_free_vec(lval);
> + tcg_temp_free_vec(rval);
> + tcg_temp_free_vec(lsh);
> + tcg_temp_free_vec(rsh);
> +}
> +
> +static const TCGOpcode ushl_list[] = {
> + INDEX_op_neg_vec, INDEX_op_shlv_vec,
> + INDEX_op_shrv_vec, INDEX_op_cmp_vec, 0
> +};
> +
> +const GVecGen3 ushl_op[4] = {
> + { .fniv = gen_ushl_vec,
> + .fno = gen_helper_gvec_ushl_b,
> + .opt_opc = ushl_list,
> + .vece = MO_8 },
> + { .fniv = gen_ushl_vec,
> + .fno = gen_helper_gvec_ushl_h,
> + .opt_opc = ushl_list,
> + .vece = MO_16 },
> + { .fni4 = gen_ushl_i32,
> + .fniv = gen_ushl_vec,
> + .opt_opc = ushl_list,
> + .vece = MO_32 },
> + { .fni8 = gen_ushl_i64,
> + .fniv = gen_ushl_vec,
> + .opt_opc = ushl_list,
> + .vece = MO_64 },
> +};
> +
> +void gen_sshl_i32(TCGv_i32 d, TCGv_i32 a, TCGv_i32 b)
> +{
> + TCGv_i32 lval = tcg_temp_new_i32();
> + TCGv_i32 rval = tcg_temp_new_i32();
> + TCGv_i32 lsh = tcg_temp_new_i32();
> + TCGv_i32 rsh = tcg_temp_new_i32();
> + TCGv_i32 zero = tcg_const_i32(0);
> + TCGv_i32 max = tcg_const_i32(31);
> +
> + /*
> + * Rely on the TCG guarantee that out of range shifts produce
> + * unspecified results, not undefined behaviour (i.e. no trap).
> + * Discard out-of-range results after the fact.
> + */
> + tcg_gen_ext8s_i32(lsh, b);
> + tcg_gen_neg_i32(rsh, lsh);
> + tcg_gen_shl_i32(lval, a, lsh);
> + tcg_gen_umin_i32(rsh, rsh, max);
> + tcg_gen_sar_i32(rval, a, rsh);
> + tcg_gen_movcond_i32(TCG_COND_LEU, lval, lsh, max, lval, zero);
> + tcg_gen_movcond_i32(TCG_COND_LT, d, lsh, zero, rval, lval);
> +
> + tcg_temp_free_i32(lval);
> + tcg_temp_free_i32(rval);
> + tcg_temp_free_i32(lsh);
> + tcg_temp_free_i32(rsh);
> + tcg_temp_free_i32(zero);
> + tcg_temp_free_i32(max);
> +}
> +
> +void gen_sshl_i64(TCGv_i64 d, TCGv_i64 a, TCGv_i64 b)
> +{
> + TCGv_i64 lval = tcg_temp_new_i64();
> + TCGv_i64 rval = tcg_temp_new_i64();
> + TCGv_i64 lsh = tcg_temp_new_i64();
> + TCGv_i64 rsh = tcg_temp_new_i64();
> + TCGv_i64 zero = tcg_const_i64(0);
> + TCGv_i64 max = tcg_const_i64(63);
> +
> + /*
> + * Rely on the TCG guarantee that out of range shifts produce
> + * unspecified results, not undefined behaviour (i.e. no trap).
> + * Discard out-of-range results after the fact.
> + */
> + tcg_gen_ext8s_i64(lsh, b);
> + tcg_gen_neg_i64(rsh, lsh);
> + tcg_gen_shl_i64(lval, a, lsh);
> + tcg_gen_umin_i64(rsh, rsh, max);
> + tcg_gen_sar_i64(rval, a, rsh);
> + tcg_gen_movcond_i64(TCG_COND_LEU, lval, lsh, max, lval, zero);
> + tcg_gen_movcond_i64(TCG_COND_LT, d, lsh, zero, rval, lval);
> +
> + tcg_temp_free_i64(lval);
> + tcg_temp_free_i64(rval);
> + tcg_temp_free_i64(lsh);
> + tcg_temp_free_i64(rsh);
> + tcg_temp_free_i64(zero);
> + tcg_temp_free_i64(max);
> +}
> +
> +static void gen_sshl_vec(unsigned vece, TCGv_vec d, TCGv_vec a, TCGv_vec b)
> +{
> + TCGv_vec lval = tcg_temp_new_vec_matching(d);
> + TCGv_vec rval = tcg_temp_new_vec_matching(d);
> + TCGv_vec lsh = tcg_temp_new_vec_matching(d);
> + TCGv_vec rsh = tcg_temp_new_vec_matching(d);
> + TCGv_vec tmp = tcg_temp_new_vec_matching(d);
> +
> + /*
> + * Rely on the TCG guarantee that out of range shifts produce
> + * unspecified results, not undefined behaviour (i.e. no trap).
> + * Discard out-of-range results after the fact.
> + */
> + tcg_gen_neg_vec(vece, rsh, b);
> + if (vece == MO_8) {
> + tcg_gen_mov_vec(lsh, b);
> + } else {
> + tcg_gen_dupi_vec(vece, tmp, 0xff);
> + tcg_gen_and_vec(vece, lsh, b, tmp);
> + tcg_gen_and_vec(vece, rsh, rsh, tmp);
> + }
> +
> + /* Bound rsh so out of bound right shift gets -1. */
> + tcg_gen_dupi_vec(vece, tmp, (8 << vece) - 1);
> + tcg_gen_umin_vec(vece, rsh, rsh, tmp);
> + tcg_gen_cmp_vec(TCG_COND_GT, vece, tmp, lsh, tmp);
> +
> + tcg_gen_shlv_vec(vece, lval, a, lsh);
> + tcg_gen_sarv_vec(vece, rval, a, rsh);
> +
> + /* Select in-bound left shift. */
> + tcg_gen_andc_vec(vece, lval, lval, tmp);
> +
> + /* Select between left and right shift. */
> + if (vece == MO_8) {
> + tcg_gen_dupi_vec(vece, tmp, 0);
> + tcg_gen_cmpsel_vec(TCG_COND_LT, vece, d, lsh, tmp, rval, lval);
> + } else {
> + tcg_gen_dupi_vec(vece, tmp, 0x80);
> + tcg_gen_cmpsel_vec(TCG_COND_LT, vece, d, lsh, tmp, lval, rval);
> + }
> +
> + tcg_temp_free_vec(lval);
> + tcg_temp_free_vec(rval);
> + tcg_temp_free_vec(lsh);
> + tcg_temp_free_vec(rsh);
> + tcg_temp_free_vec(tmp);
> +}
> +
> +static const TCGOpcode sshl_list[] = {
> + INDEX_op_neg_vec, INDEX_op_umin_vec, INDEX_op_shlv_vec,
> + INDEX_op_sarv_vec, INDEX_op_cmp_vec, INDEX_op_cmpsel_vec, 0
> +};
> +
> +const GVecGen3 sshl_op[4] = {
> + { .fniv = gen_sshl_vec,
> + .fno = gen_helper_gvec_sshl_b,
> + .opt_opc = sshl_list,
> + .vece = MO_8 },
> + { .fniv = gen_sshl_vec,
> + .fno = gen_helper_gvec_sshl_h,
> + .opt_opc = sshl_list,
> + .vece = MO_16 },
> + { .fni4 = gen_sshl_i32,
> + .fniv = gen_sshl_vec,
> + .opt_opc = sshl_list,
> + .vece = MO_32 },
> + { .fni8 = gen_sshl_i64,
> + .fniv = gen_sshl_vec,
> + .opt_opc = sshl_list,
> + .vece = MO_64 },
> +};
> +
> static void gen_uqadd_vec(unsigned vece, TCGv_vec t, TCGv_vec sat,
> TCGv_vec a, TCGv_vec b)
> {
> @@ -4792,6 +5068,12 @@ static int disas_neon_data_insn(DisasContext *s,
> uint32_t insn)
> vec_size, vec_size);
> }
> return 0;
> +
> + case NEON_3R_VSHL:
> + /* Note the operation is vshl vd,vm,vn */
> + tcg_gen_gvec_3(rd_ofs, rm_ofs, rn_ofs, vec_size, vec_size,
> + u ? &ushl_op[size] : &sshl_op[size]);
> + return 0;
> }
>
> if (size == 3) {
> @@ -4800,13 +5082,6 @@ static int disas_neon_data_insn(DisasContext *s,
> uint32_t insn)
> neon_load_reg64(cpu_V0, rn + pass);
> neon_load_reg64(cpu_V1, rm + pass);
> switch (op) {
> - case NEON_3R_VSHL:
> - if (u) {
> - gen_helper_neon_shl_u64(cpu_V0, cpu_V1, cpu_V0);
> - } else {
> - gen_helper_neon_shl_s64(cpu_V0, cpu_V1, cpu_V0);
> - }
> - break;
> case NEON_3R_VQSHL:
> if (u) {
> gen_helper_neon_qshl_u64(cpu_V0, cpu_env,
> @@ -4841,7 +5116,6 @@ static int disas_neon_data_insn(DisasContext *s,
> uint32_t insn)
> }
> pairwise = 0;
> switch (op) {
> - case NEON_3R_VSHL:
> case NEON_3R_VQSHL:
> case NEON_3R_VRSHL:
> case NEON_3R_VQRSHL:
> @@ -4921,9 +5195,6 @@ static int disas_neon_data_insn(DisasContext *s,
> uint32_t insn)
> case NEON_3R_VHSUB:
> GEN_NEON_INTEGER_OP(hsub);
> break;
> - case NEON_3R_VSHL:
> - GEN_NEON_INTEGER_OP(shl);
> - break;
> case NEON_3R_VQSHL:
> GEN_NEON_INTEGER_OP_ENV(qshl);
> break;
> @@ -5332,9 +5603,9 @@ static int disas_neon_data_insn(DisasContext *s,
> uint32_t insn)
> }
> } else {
> if (input_unsigned) {
> - gen_helper_neon_shl_u64(cpu_V0, in, tmp64);
> + gen_ushl_i64(cpu_V0, in, tmp64);
> } else {
> - gen_helper_neon_shl_s64(cpu_V0, in, tmp64);
> + gen_sshl_i64(cpu_V0, in, tmp64);
> }
> }
> tmp = tcg_temp_new_i32();
> diff --git a/target/arm/vec_helper.c b/target/arm/vec_helper.c
> index dedef62403..fcb3663903 100644
> --- a/target/arm/vec_helper.c
> +++ b/target/arm/vec_helper.c
> @@ -1046,3 +1046,91 @@ void HELPER(gvec_fmlal_idx_a64)(void *vd, void *vn,
> void *vm,
> do_fmlal_idx(vd, vn, vm, &env->vfp.fp_status, desc,
> get_flush_inputs_to_zero(&env->vfp.fp_status_f16));
> }
> +
> +void HELPER(gvec_sshl_b)(void *vd, void *vn, void *vm, uint32_t desc)
> +{
> + intptr_t i, opr_sz = simd_oprsz(desc);
> + int8_t *d = vd, *n = vn, *m = vm;
> +
> + for (i = 0; i < opr_sz; ++i) {
> + int8_t mm = m[i];
> + int8_t nn = n[i];
> + int8_t res = 0;
> + if (mm >= 0) {
> + if (mm < 8) {
> + res = nn << mm;
> + }
> + } else {
> + res = nn >> (mm > -8 ? -mm : 7);
> + }
> + d[i] = res;
> + }
> + clear_tail(d, opr_sz, simd_maxsz(desc));
> +}
> +
> +void HELPER(gvec_sshl_h)(void *vd, void *vn, void *vm, uint32_t desc)
> +{
> + intptr_t i, opr_sz = simd_oprsz(desc);
> + int16_t *d = vd, *n = vn, *m = vm;
> +
> + for (i = 0; i < opr_sz / 2; ++i) {
> + int8_t mm = m[i]; /* only 8 bits of shift are significant */
> + int16_t nn = n[i];
> + int16_t res = 0;
> + if (mm >= 0) {
> + if (mm < 16) {
> + res = nn << mm;
> + }
> + } else {
> + res = nn >> (mm > -16 ? -mm : 15);
> + }
> + d[i] = res;
> + }
> + clear_tail(d, opr_sz, simd_maxsz(desc));
> +}
> +
> +void HELPER(gvec_ushl_b)(void *vd, void *vn, void *vm, uint32_t desc)
> +{
> + intptr_t i, opr_sz = simd_oprsz(desc);
> + uint8_t *d = vd, *n = vn, *m = vm;
> +
> + for (i = 0; i < opr_sz; ++i) {
> + int8_t mm = m[i];
> + uint8_t nn = n[i];
> + uint8_t res = 0;
> + if (mm >= 0) {
> + if (mm < 8) {
> + res = nn << mm;
> + }
> + } else {
> + if (mm > -8) {
> + res = nn >> -mm;
> + }
> + }
> + d[i] = res;
> + }
> + clear_tail(d, opr_sz, simd_maxsz(desc));
> +}
> +
> +void HELPER(gvec_ushl_h)(void *vd, void *vn, void *vm, uint32_t desc)
> +{
> + intptr_t i, opr_sz = simd_oprsz(desc);
> + uint16_t *d = vd, *n = vn, *m = vm;
> +
> + for (i = 0; i < opr_sz / 2; ++i) {
> + int8_t mm = m[i]; /* only 8 bits of shift are significant */
> + uint16_t nn = n[i];
> + uint16_t res = 0;
> + if (mm >= 0) {
> + if (mm < 16) {
> + res = nn << mm;
> + }
> + } else {
> + if (mm > -16) {
> + res = nn >> -mm;
> + }
> + }
> + d[i] = res;
> + }
> + clear_tail(d, opr_sz, simd_maxsz(desc));
> +}
Anyway otherwise it LGTM:
Reviewed-by: Alex Bennée <alex.ben...@linaro.org>
--
Alex Bennée
