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target/arm: Implement SME LDR, STR 

We can reuse the SVE functions for LDR and STR, passing in the
base of the ZA vector and a zero offset.

Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20220708151540.18136-23-richard.henderson@linaro.org
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
This commit is contained in:
Richard Henderson 2022-07-08 20:45:17 +05:30 committed by Peter Maydell
parent 8713f73e53
commit 4c46a5f12c
2 changed files with 31 additions and 0 deletions
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7
target/arm/sme.decode
View File

@ -46,3 +46,10 @@ LDST1 1110000 0 esz:2 st:1 rm:5 v:1 .. pg:3 rn:5 0 za_imm:4 \
&ldst rs=%mova_rs
LDST1 1110000 111 st:1 rm:5 v:1 .. pg:3 rn:5 0 za_imm:4 \
&ldst esz=4 rs=%mova_rs
&ldstr rv rn imm
@ldstr ....... ... . ...... .. ... rn:5 . imm:4 \
&ldstr rv=%mova_rs
LDR 1110000 100 0 000000 .. 000 ..... 0 .... @ldstr
STR 1110000 100 1 000000 .. 000 ..... 0 .... @ldstr

24
target/arm/translate-sme.c
View File

@ -243,3 +243,27 @@ static bool trans_LDST1(DisasContext *s, arg_LDST1 *a)
tcg_temp_free_i64(addr);
return true;
}
typedef void GenLdStR(DisasContext *, TCGv_ptr, int, int, int, int);
static bool do_ldst_r(DisasContext *s, arg_ldstr *a, GenLdStR *fn)
{
int svl = streaming_vec_reg_size(s);
int imm = a->imm;
TCGv_ptr base;
if (!sme_za_enabled_check(s)) {
return true;
}
/* ZA[n] equates to ZA0H.B[n]. */
base = get_tile_rowcol(s, MO_8, a->rv, imm, false);
fn(s, base, 0, svl, a->rn, imm * svl);
tcg_temp_free_ptr(base);
return true;
}
TRANS_FEAT(LDR, aa64_sme, do_ldst_r, a, gen_sve_ldr)
TRANS_FEAT(STR, aa64_sme, do_ldst_r, a, gen_sve_str)