From 0496389680a1d5e27e81fc0153b956a763defe4b Mon Sep 17 00:00:00 2001 From: Weiwei Li Date: Sat, 23 Apr 2022 10:35:00 +0800 Subject: [PATCH] target/riscv: rvk: add support for zbkx extension - add xperm4 and xperm8 instructions Signed-off-by: Weiwei Li Signed-off-by: Junqiang Wang Reviewed-by: Richard Henderson Acked-by: Alistair Francis Message-Id: <20220423023510.30794-5-liweiwei@iscas.ac.cn> Signed-off-by: Alistair Francis --- target/riscv/bitmanip_helper.c | 27 +++++++++++++++++++++++++ target/riscv/helper.h | 2 ++ target/riscv/insn32.decode | 4 ++++ target/riscv/insn_trans/trans_rvb.c.inc | 18 +++++++++++++++++ 4 files changed, 51 insertions(+) diff --git a/target/riscv/bitmanip_helper.c b/target/riscv/bitmanip_helper.c index e003e8b25b..b99c4a39a1 100644 --- a/target/riscv/bitmanip_helper.c +++ b/target/riscv/bitmanip_helper.c @@ -102,3 +102,30 @@ target_ulong HELPER(zip)(target_ulong rs1) x = do_shuf_stage(x, shuf_masks[0], shuf_masks[0] >> 1, 1); return x; } + +static inline target_ulong do_xperm(target_ulong rs1, target_ulong rs2, + uint32_t sz_log2) +{ + target_ulong r = 0; + target_ulong sz = 1LL << sz_log2; + target_ulong mask = (1LL << sz) - 1; + target_ulong pos; + + for (int i = 0; i < TARGET_LONG_BITS; i += sz) { + pos = ((rs2 >> i) & mask) << sz_log2; + if (pos < sizeof(target_ulong) * 8) { + r |= ((rs1 >> pos) & mask) << i; + } + } + return r; +} + +target_ulong HELPER(xperm4)(target_ulong rs1, target_ulong rs2) +{ + return do_xperm(rs1, rs2, 2); +} + +target_ulong HELPER(xperm8)(target_ulong rs1, target_ulong rs2) +{ + return do_xperm(rs1, rs2, 3); +} diff --git a/target/riscv/helper.h b/target/riscv/helper.h index 8a3a7615f2..cfead7abfc 100644 --- a/target/riscv/helper.h +++ b/target/riscv/helper.h @@ -69,6 +69,8 @@ DEF_HELPER_FLAGS_2(clmulr, TCG_CALL_NO_RWG_SE, tl, tl, tl) DEF_HELPER_FLAGS_1(brev8, TCG_CALL_NO_RWG_SE, tl, tl) DEF_HELPER_FLAGS_1(unzip, TCG_CALL_NO_RWG_SE, tl, tl) DEF_HELPER_FLAGS_1(zip, TCG_CALL_NO_RWG_SE, tl, tl) +DEF_HELPER_FLAGS_2(xperm4, TCG_CALL_NO_RWG_SE, tl, tl, tl) +DEF_HELPER_FLAGS_2(xperm8, TCG_CALL_NO_RWG_SE, tl, tl, tl) /* Floating Point - Half Precision */ DEF_HELPER_FLAGS_3(fadd_h, TCG_CALL_NO_RWG, i64, env, i64, i64) diff --git a/target/riscv/insn32.decode b/target/riscv/insn32.decode index 3a49acab37..75ffac9c81 100644 --- a/target/riscv/insn32.decode +++ b/target/riscv/insn32.decode @@ -776,6 +776,10 @@ clmulh 0000101 .......... 011 ..... 0110011 @r # *** RV32 extra Zbc Standard Extension *** clmulr 0000101 .......... 010 ..... 0110011 @r +# *** RV32 Zbkx Standard Extension *** +xperm4 0010100 .......... 010 ..... 0110011 @r +xperm8 0010100 .......... 100 ..... 0110011 @r + # *** RV32 Zbs Standard Extension *** bclr 0100100 .......... 001 ..... 0110011 @r bclri 01001. ........... 001 ..... 0010011 @sh diff --git a/target/riscv/insn_trans/trans_rvb.c.inc b/target/riscv/insn_trans/trans_rvb.c.inc index 5a5751557d..e2b8329f1e 100644 --- a/target/riscv/insn_trans/trans_rvb.c.inc +++ b/target/riscv/insn_trans/trans_rvb.c.inc @@ -48,6 +48,12 @@ } \ } while (0) +#define REQUIRE_ZBKX(ctx) do { \ + if (!ctx->cfg_ptr->ext_zbkx) { \ + return false; \ + } \ +} while (0) + static void gen_clz(TCGv ret, TCGv arg1) { tcg_gen_clzi_tl(ret, arg1, TARGET_LONG_BITS); @@ -574,3 +580,15 @@ static bool trans_zip(DisasContext *ctx, arg_zip *a) REQUIRE_ZBKB(ctx); return gen_unary(ctx, a, EXT_NONE, gen_helper_zip); } + +static bool trans_xperm4(DisasContext *ctx, arg_xperm4 *a) +{ + REQUIRE_ZBKX(ctx); + return gen_arith(ctx, a, EXT_NONE, gen_helper_xperm4, NULL); +} + +static bool trans_xperm8(DisasContext *ctx, arg_xperm8 *a) +{ + REQUIRE_ZBKX(ctx); + return gen_arith(ctx, a, EXT_NONE, gen_helper_xperm8, NULL); +}