在 2022/2/28 上午3:21, Richard Henderson 写道:
On 2/27/22 04:25, Weiwei Li wrote:
- add sha256sig0, sha256sig1, sha256sum0 and sha256sum1 instructions
Co-authored-by: Zewen Ye <lust...@foxmail.com>
Signed-off-by: Weiwei Li <liwei...@iscas.ac.cn>
Signed-off-by: Junqiang Wang <wangjunqi...@iscas.ac.cn>
---
target/riscv/crypto_helper.c | 31 +++++++++++++
target/riscv/helper.h | 5 +++
target/riscv/insn32.decode | 5 +++
target/riscv/insn_trans/trans_rvk.c.inc | 58 +++++++++++++++++++++++++
4 files changed, 99 insertions(+)
diff --git a/target/riscv/crypto_helper.c b/target/riscv/crypto_helper.c
index 9e56668627..f5ffc262f2 100644
--- a/target/riscv/crypto_helper.c
+++ b/target/riscv/crypto_helper.c
@@ -272,4 +272,35 @@ target_ulong HELPER(aes64im)(target_ulong rs1)
return result;
}
+
+#define ROR32(a, amt) ((a << (-amt & 31)) | (a >> (amt & 31)))
We already have a ror32 function. However...
OK. I'll change to use it.
+target_ulong HELPER(sha256sig0)(target_ulong rs1)
+{
+ uint32_t a = rs1;
+
+ return sext_xlen(ROR32(a, 7) ^ ROR32(a, 18) ^ (a >> 3));
+}
+
+target_ulong HELPER(sha256sig1)(target_ulong rs1)
+{
+ uint32_t a = rs1;
+
+ return sext_xlen(ROR32(a, 17) ^ ROR32(a, 19) ^ (a >> 10));
+}
+
+target_ulong HELPER(sha256sum0)(target_ulong rs1)
+{
+ uint32_t a = rs1;
+
+ return sext_xlen(ROR32(a, 2) ^ ROR32(a, 13) ^ ROR32(a, 22));
+}
+
+target_ulong HELPER(sha256sum1)(target_ulong rs1)
+{
+ uint32_t a = rs1;
+
+ return sext_xlen(ROR32(a, 6) ^ ROR32(a, 11) ^ ROR32(a, 25));
+}
All of these functions are quite small, and could easily be generated
inline.
tcg_gen_trunc_tl_i32(a, reg);
tcg_gen_rotri_i32(t1, a, 7);
tcg_gen_rotri_i32(t2, a, 18);
tcg_gen_xor_i32(t1, t1, t2);
tcg_gen_shri_i32(t2, a, 3);
tcg_gen_xor_i32(t1, t1, t2);
tcg_gen_ext_i32_tl(reg, t1);
OK. I'll change to this.
+static bool trans_sha256sig0(DisasContext *ctx, arg_sha256sig0 *a)
+{
+ REQUIRE_ZKNH(ctx);
+
+ TCGv dest = dest_gpr(ctx, a->rd);
+ TCGv src1 = get_gpr(ctx, a->rs1, EXT_NONE);
+
+ gen_helper_sha256sig0(dest, src1);
+ gen_set_gpr(ctx, a->rd, dest);
+
+ return true;
+}
gen_unary, etc.
OK. I'll fix it.
Regards,
Weiwei Li
r~
