diff mbox series

[v4,09/17] target/riscv: support for 128-bit bitwise instructions

Message ID 20211025122818.168890-10-frederic.petrot@univ-grenoble-alpes.fr (mailing list archive)
State New, archived
Headers show
Series Adding partial support for 128-bit riscv target | expand

Commit Message

Frédéric Pétrot Oct. 25, 2021, 12:28 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 <frederic.petrot@univ-grenoble-alpes.fr>
Co-authored-by: Fabien Portas <fabien.portas@grenoble-inp.org>
---
 target/riscv/translate.c | 21 +++++++++++++++++++--
 1 file changed, 19 insertions(+), 2 deletions(-)

Comments

Richard Henderson Oct. 31, 2021, 3:44 a.m. UTC | #1 
On 10/25/21 5:28 AM, Frédéric Pétrot wrote:
> 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<frederic.petrot@univ-grenoble-alpes.fr>
> Co-authored-by: Fabien Portas<fabien.portas@grenoble-inp.org>
> ---
>   target/riscv/translate.c | 21 +++++++++++++++++++--
>   1 file changed, 19 insertions(+), 2 deletions(-)

Reviewed-by: Richard Henderson <richard.henderson@linaro.org>

r~
diff mbox series

Patch

diff --git a/target/riscv/translate.c b/target/riscv/translate.c
index 070db77ca5..b183ad2b6e 100644
--- a/target/riscv/translate.c
+++ b/target/riscv/translate.c
@@ -426,7 +426,15 @@  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;
 }
@@ -440,7 +448,16 @@  static bool gen_logic(DisasContext *ctx, arg_r *a, DisasExtend ext,
 
     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;
 }