diff options
author | Richard Henderson <richard.henderson@linaro.org> | 2020-04-20 04:03:09 +0000 |
---|---|---|
committer | Richard Henderson <richard.henderson@linaro.org> | 2020-06-02 08:42:37 -0700 |
commit | 7cff8988fade36f20659aad80f2f763ff054ef48 (patch) | |
tree | e33d4d39b4af880915fcf6911d264e79082aaf83 /tcg/aarch64 | |
parent | 885b1706df6f0211a22e120fac910fb3abf3e733 (diff) | |
download | qemu-7cff8988fade36f20659aad80f2f763ff054ef48.zip qemu-7cff8988fade36f20659aad80f2f763ff054ef48.tar.gz qemu-7cff8988fade36f20659aad80f2f763ff054ef48.tar.bz2 |
tcg/aarch64: Implement INDEX_op_rotl{i,v}_vec
For immediate rotate , we can implement this in two instructions,
using SLI. For variable rotate, the oddness of aarch64 right-shift-
as-negative-left-shift means a backend-specific expansion works best.
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Diffstat (limited to 'tcg/aarch64')
-rw-r--r-- | tcg/aarch64/tcg-target.inc.c | 53 | ||||
-rw-r--r-- | tcg/aarch64/tcg-target.opc.h | 1 |
2 files changed, 52 insertions, 2 deletions
diff --git a/tcg/aarch64/tcg-target.inc.c b/tcg/aarch64/tcg-target.inc.c index 843fd0c..760b0e7 100644 --- a/tcg/aarch64/tcg-target.inc.c +++ b/tcg/aarch64/tcg-target.inc.c @@ -557,6 +557,7 @@ typedef enum { I3614_SSHR = 0x0f000400, I3614_SSRA = 0x0f001400, I3614_SHL = 0x0f005400, + I3614_SLI = 0x2f005400, I3614_USHR = 0x2f000400, I3614_USRA = 0x2f001400, @@ -2411,6 +2412,9 @@ static void tcg_out_vec_op(TCGContext *s, TCGOpcode opc, case INDEX_op_sari_vec: tcg_out_insn(s, 3614, SSHR, is_q, a0, a1, (16 << vece) - a2); break; + case INDEX_op_aa64_sli_vec: + tcg_out_insn(s, 3614, SLI, is_q, a0, a2, args[3] + (8 << vece)); + break; case INDEX_op_shlv_vec: tcg_out_insn(s, 3616, USHL, is_q, vece, a0, a1, a2); break; @@ -2498,8 +2502,11 @@ int tcg_can_emit_vec_op(TCGOpcode opc, TCGType type, unsigned vece) case INDEX_op_shlv_vec: case INDEX_op_bitsel_vec: return 1; + case INDEX_op_rotli_vec: case INDEX_op_shrv_vec: case INDEX_op_sarv_vec: + case INDEX_op_rotlv_vec: + case INDEX_op_rotrv_vec: return -1; case INDEX_op_mul_vec: case INDEX_op_smax_vec: @@ -2517,14 +2524,24 @@ void tcg_expand_vec_op(TCGOpcode opc, TCGType type, unsigned vece, TCGArg a0, ...) { va_list va; - TCGv_vec v0, v1, v2, t1; + TCGv_vec v0, v1, v2, t1, t2; + TCGArg a2; va_start(va, a0); v0 = temp_tcgv_vec(arg_temp(a0)); v1 = temp_tcgv_vec(arg_temp(va_arg(va, TCGArg))); - v2 = temp_tcgv_vec(arg_temp(va_arg(va, TCGArg))); + a2 = va_arg(va, TCGArg); + v2 = temp_tcgv_vec(arg_temp(a2)); switch (opc) { + case INDEX_op_rotli_vec: + t1 = tcg_temp_new_vec(type); + tcg_gen_shri_vec(vece, t1, v1, -a2 & ((8 << vece) - 1)); + vec_gen_4(INDEX_op_aa64_sli_vec, type, vece, + tcgv_vec_arg(v0), tcgv_vec_arg(t1), tcgv_vec_arg(v1), a2); + tcg_temp_free_vec(t1); + break; + case INDEX_op_shrv_vec: case INDEX_op_sarv_vec: /* Right shifts are negative left shifts for AArch64. */ @@ -2537,6 +2554,35 @@ void tcg_expand_vec_op(TCGOpcode opc, TCGType type, unsigned vece, tcg_temp_free_vec(t1); break; + case INDEX_op_rotlv_vec: + t1 = tcg_temp_new_vec(type); + tcg_gen_dupi_vec(vece, t1, 8 << vece); + tcg_gen_sub_vec(vece, t1, v2, t1); + /* Right shifts are negative left shifts for AArch64. */ + vec_gen_3(INDEX_op_shlv_vec, type, vece, tcgv_vec_arg(t1), + tcgv_vec_arg(v1), tcgv_vec_arg(t1)); + vec_gen_3(INDEX_op_shlv_vec, type, vece, tcgv_vec_arg(v0), + tcgv_vec_arg(v1), tcgv_vec_arg(v2)); + tcg_gen_or_vec(vece, v0, v0, t1); + tcg_temp_free_vec(t1); + break; + + case INDEX_op_rotrv_vec: + t1 = tcg_temp_new_vec(type); + t2 = tcg_temp_new_vec(type); + tcg_gen_neg_vec(vece, t1, v2); + tcg_gen_dupi_vec(vece, t2, 8 << vece); + tcg_gen_add_vec(vece, t2, t1, t2); + /* Right shifts are negative left shifts for AArch64. */ + vec_gen_3(INDEX_op_shlv_vec, type, vece, tcgv_vec_arg(t1), + tcgv_vec_arg(v1), tcgv_vec_arg(t1)); + vec_gen_3(INDEX_op_shlv_vec, type, vece, tcgv_vec_arg(t2), + tcgv_vec_arg(v1), tcgv_vec_arg(t2)); + tcg_gen_or_vec(vece, v0, t1, t2); + tcg_temp_free_vec(t1); + tcg_temp_free_vec(t2); + break; + default: g_assert_not_reached(); } @@ -2557,6 +2603,7 @@ static const TCGTargetOpDef *tcg_target_op_def(TCGOpcode op) static const TCGTargetOpDef lZ_l = { .args_ct_str = { "lZ", "l" } }; static const TCGTargetOpDef r_r_r = { .args_ct_str = { "r", "r", "r" } }; static const TCGTargetOpDef w_w_w = { .args_ct_str = { "w", "w", "w" } }; + static const TCGTargetOpDef w_0_w = { .args_ct_str = { "w", "0", "w" } }; static const TCGTargetOpDef w_w_wO = { .args_ct_str = { "w", "w", "wO" } }; static const TCGTargetOpDef w_w_wN = { .args_ct_str = { "w", "w", "wN" } }; static const TCGTargetOpDef w_w_wZ = { .args_ct_str = { "w", "w", "wZ" } }; @@ -2751,6 +2798,8 @@ static const TCGTargetOpDef *tcg_target_op_def(TCGOpcode op) return &w_w_wZ; case INDEX_op_bitsel_vec: return &w_w_w_w; + case INDEX_op_aa64_sli_vec: + return &w_0_w; default: return NULL; diff --git a/tcg/aarch64/tcg-target.opc.h b/tcg/aarch64/tcg-target.opc.h index 26bfd9c..bce30ac 100644 --- a/tcg/aarch64/tcg-target.opc.h +++ b/tcg/aarch64/tcg-target.opc.h @@ -12,3 +12,4 @@ */ DEF(aa64_sshl_vec, 1, 2, 0, IMPLVEC) +DEF(aa64_sli_vec, 1, 2, 1, IMPLVEC) |