[v6,10/18] target/riscv: support for 128-bit bitwise instructions

Commit Message

Frédéric Pétrot Nov. 28, 2021, 1:57 p.m. UTC

The 128-bit bitwise instructions do not need any function prototype change
as the functions can be applied independently on the lower and upper part of
the registers.

Signed-off-by: Frédéric Pétrot <[e-mail]>
Co-authored-by: Fabien Portas <[e-mail]>
Reviewed-by: Richard Henderson <[e-mail]>
Reviewed-by: Alistair Francis <[e-mail]>
---
 target/riscv/translate.c | 21 +++++++++++++++++++--
 1 file changed, 19 insertions(+), 2 deletions(-)

Patch

diff --git a/target/riscv/translate.c b/target/riscv/translate.c
index b6127783b3..4790dc0cb4 100644
--- a/target/riscv/translate.c
+++ b/target/riscv/translate.c
@@ -448,7 +448,15 @@  static bool gen_logic_imm_fn(DisasContext *ctx, arg_i *a,
 
     func(dest, src1, a->imm);
 
-    gen_set_gpr(ctx, a->rd, dest);
+    if (get_xl(ctx) == MXL_RV128) {
+        TCGv src1h = get_gprh(ctx, a->rs1);
+        TCGv desth = dest_gprh(ctx, a->rd);
+
+        func(desth, src1h, -(a->imm < 0));
+        gen_set_gpr128(ctx, a->rd, dest, desth);
+    } else {
+        gen_set_gpr(ctx, a->rd, dest);
+    }
 
     return true;
 }
@@ -462,7 +470,16 @@  static bool gen_logic(DisasContext *ctx, arg_r *a,
 
     func(dest, src1, src2);
 
-    gen_set_gpr(ctx, a->rd, dest);
+    if (get_xl(ctx) == MXL_RV128) {
+        TCGv src1h = get_gprh(ctx, a->rs1);
+        TCGv src2h = get_gprh(ctx, a->rs2);
+        TCGv desth = dest_gprh(ctx, a->rd);
+
+        func(desth, src1h, src2h);
+        gen_set_gpr128(ctx, a->rd, dest, desth);
+    } else {
+        gen_set_gpr(ctx, a->rd, dest);
+    }
 
     return true;
 }