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target/arm: Convert Neon 3-reg-same VMAX/VMIN to decodetree

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Convert the Neon 3-reg-same VMAX and VMIN insns to decodetree.

Backports commit 36b59310c38d45213bf860affa90618aa5eeca93 from qemu
This commit is contained in:
Peter Maydell 2020-05-07 09:42:01 -04:00 committed by Lioncash
parent d30f99ca79
commit c6f9fb54fd
3 changed files with 21 additions and 19 deletions
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5
qemu/target/arm/neon-dp.decode
View file

@ -54,5 +54,10 @@ VBSL_3s 1111 001 1 0 . 01 .... .... 0001 ... 1 .... @3same_logic
VBIT_3s 1111 001 1 0 . 10 .... .... 0001 ... 1 .... @3same_logic
VBIF_3s 1111 001 1 0 . 11 .... .... 0001 ... 1 .... @3same_logic
VMAX_S_3s 1111 001 0 0 . .. .... .... 0110 . . . 0 .... @3same
VMAX_U_3s 1111 001 1 0 . .. .... .... 0110 . . . 0 .... @3same
VMIN_S_3s 1111 001 0 0 . .. .... .... 0110 . . . 1 .... @3same
VMIN_U_3s 1111 001 1 0 . .. .... .... 0110 . . . 1 .... @3same
VADD_3s 1111 001 0 0 . .. .... .... 1000 . . . 0 .... @3same
VSUB_3s 1111 001 1 0 . .. .... .... 1000 . . . 0 .... @3same

14
qemu/target/arm/translate-neon.inc.c
View file

@ -630,3 +630,17 @@ DO_3SAME(VEOR, tcg_gen_gvec_xor)
DO_3SAME_BITSEL(VBSL, rd_ofs, rn_ofs, rm_ofs)
DO_3SAME_BITSEL(VBIT, rm_ofs, rn_ofs, rd_ofs)
DO_3SAME_BITSEL(VBIF, rm_ofs, rd_ofs, rn_ofs)
#define DO_3SAME_NO_SZ_3(INSN, FUNC) \
static bool trans_##INSN##_3s(DisasContext *s, arg_3same *a) \
{ \
if (a->size == 3) { \
return false; \
} \
return do_3same(s, a, FUNC); \
}
DO_3SAME_NO_SZ_3(VMAX_S, tcg_gen_gvec_smax)
DO_3SAME_NO_SZ_3(VMAX_U, tcg_gen_gvec_umax)
DO_3SAME_NO_SZ_3(VMIN_S, tcg_gen_gvec_smin)
DO_3SAME_NO_SZ_3(VMIN_U, tcg_gen_gvec_umin)

21
qemu/target/arm/translate.c
View file

@ -5030,25 +5030,6 @@ static int disas_neon_data_insn(DisasContext *s, uint32_t insn)
rd_ofs, rn_ofs, rm_ofs, vec_size, vec_size);
return 0;
case NEON_3R_VMAX:
if (u) {
tcg_gen_gvec_umax(tcg_ctx, size, rd_ofs, rn_ofs, rm_ofs,
vec_size, vec_size);
} else {
tcg_gen_gvec_smax(tcg_ctx, size, rd_ofs, rn_ofs, rm_ofs,
vec_size, vec_size);
}
return 0;
case NEON_3R_VMIN:
if (u) {
tcg_gen_gvec_umin(tcg_ctx, size, rd_ofs, rn_ofs, rm_ofs,
vec_size, vec_size);
} else {
tcg_gen_gvec_smin(tcg_ctx, size, rd_ofs, rn_ofs, rm_ofs,
vec_size, vec_size);
}
return 0;
case NEON_3R_VSHL:
/* Note the operation is vshl vd,vm,vn */
tcg_gen_gvec_3(tcg_ctx, rd_ofs, rm_ofs, rn_ofs, vec_size, vec_size,
@ -5057,6 +5038,8 @@ static int disas_neon_data_insn(DisasContext *s, uint32_t insn)
case NEON_3R_VADD_VSUB:
case NEON_3R_LOGIC:
case NEON_3R_VMAX:
case NEON_3R_VMIN:
/* Already handled by decodetree */
return 1;
}