From: Richard Henderson <richard.henderson@linaro.org>
To: qemu-devel@nongnu.org
Cc: alistair.francis@wdc.com, bin.meng@windriver.com, qemu-riscv@nongnu.org
Subject: [PATCH v3 12/21] target/riscv: Add gen_greviw
Date: Wed, 18 Aug 2021 23:04:53 -1000 [thread overview]
Message-ID: <20210819090502.428068-13-richard.henderson@linaro.org> (raw)
In-Reply-To: <20210819090502.428068-1-richard.henderson@linaro.org>
Replicate the bswap special case from gen_grevi for
the word-sized operation.
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
---
target/riscv/insn_trans/trans_rvb.c.inc | 14 +++++++++++++-
1 file changed, 13 insertions(+), 1 deletion(-)
diff --git a/target/riscv/insn_trans/trans_rvb.c.inc b/target/riscv/insn_trans/trans_rvb.c.inc
index b97c3ca5da..af7694ed29 100644
--- a/target/riscv/insn_trans/trans_rvb.c.inc
+++ b/target/riscv/insn_trans/trans_rvb.c.inc
@@ -568,12 +568,24 @@ static bool trans_grevw(DisasContext *ctx, arg_grevw *a)
return gen_shift(ctx, a, EXT_ZERO, gen_helper_grev);
}
+static void gen_greviw(TCGv dest, TCGv src, target_long shamt)
+{
+#if TARGET_LONG_BITS == 64
+ if (shamt == 32 - 8) {
+ /* rev4, byte swaps */
+ tcg_gen_bswap32_i64(dest, src, TCG_BSWAP_IZ | TCG_BSWAP_OS);
+ return;
+ }
+#endif
+ gen_helper_grev(dest, src, tcg_constant_tl(shamt));
+}
+
static bool trans_greviw(DisasContext *ctx, arg_greviw *a)
{
REQUIRE_64BIT(ctx);
REQUIRE_EXT(ctx, RVB);
ctx->w = true;
- return gen_shift_imm_tl(ctx, a, EXT_ZERO, gen_helper_grev);
+ return gen_shift_imm_fn(ctx, a, EXT_ZERO, gen_greviw);
}
static bool trans_gorcw(DisasContext *ctx, arg_gorcw *a)
--
2.25.1
next prev parent reply other threads:[~2021-08-19 9:16 UTC|newest]
Thread overview: 26+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-08-19 9:04 [PATCH v3 00/21] target/riscv: Use tcg_constant_* Richard Henderson
2021-08-19 9:04 ` [PATCH v3 01/21] " Richard Henderson
2021-08-19 9:04 ` [PATCH v3 02/21] target/riscv: Clean up division helpers Richard Henderson
2021-08-19 11:00 ` Bin Meng
2021-08-19 17:23 ` Richard Henderson
2021-08-19 9:04 ` [PATCH v3 03/21] target/riscv: Add DisasContext to gen_get_gpr, gen_set_gpr Richard Henderson
2021-08-19 9:04 ` [PATCH v3 04/21] target/riscv: Introduce DisasExtend and new helpers Richard Henderson
2021-08-19 11:01 ` Bin Meng
2021-08-19 9:04 ` [PATCH v3 05/21] target/riscv: Add DisasExtend to gen_arith* Richard Henderson
2021-08-19 9:04 ` [PATCH v3 06/21] target/riscv: Remove gen_arith_div* Richard Henderson
2021-08-19 9:04 ` [PATCH v3 07/21] target/riscv: Use gen_arith for mulh and mulhu Richard Henderson
2021-08-19 9:04 ` [PATCH v3 08/21] target/riscv: Move gen_* helpers for RVM Richard Henderson
2021-08-20 1:35 ` Alistair Francis
2021-08-19 9:04 ` [PATCH v3 09/21] target/riscv: Move gen_* helpers for RVB Richard Henderson
2021-08-19 9:04 ` [PATCH v3 10/21] target/riscv: Add DisasExtend to gen_unary Richard Henderson
2021-08-19 9:04 ` [PATCH v3 11/21] target/riscv: Use DisasExtend in shift operations Richard Henderson
2021-08-19 9:04 ` Richard Henderson [this message]
2021-08-19 9:04 ` [PATCH v3 13/21] target/riscv: Use get_gpr in branches Richard Henderson
2021-08-19 9:04 ` [PATCH v3 14/21] target/riscv: Use {get, dest}_gpr for integer load/store Richard Henderson
2021-08-19 9:04 ` [PATCH v3 15/21] target/riscv: Reorg csr instructions Richard Henderson
2021-08-19 9:04 ` [PATCH v3 16/21] target/riscv: Use {get,dest}_gpr for RVA Richard Henderson
2021-08-19 9:04 ` [PATCH v3 17/21] target/riscv: Use gen_shift_imm_fn for slli_uw Richard Henderson
2021-08-19 9:04 ` [PATCH v3 18/21] target/riscv: Use {get,dest}_gpr for RVF Richard Henderson
2021-08-19 9:05 ` [PATCH v3 19/21] target/riscv: Use {get,dest}_gpr for RVD Richard Henderson
2021-08-19 9:05 ` [PATCH v3 20/21] target/riscv: Tidy trans_rvh.c.inc Richard Henderson
2021-08-19 9:05 ` [PATCH v3 21/21] target/riscv: Use {get,dest}_gpr for RVV Richard Henderson
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