sspush/sspopchk have compressed encodings carved out of zcmops.
compressed sspush is designated as c.mop.1 while compressed sspopchk
is designated as c.mop.5.
Note that c.sspush x1 exists while c.sspush x5 doesn't. Similarly
c.sspopchk x5 exists while c.sspopchk x1 doesn't.
Signed-off-by: Deepak Gupta <de...@rivosinc.com>
Co-developed-by: Jim Shu <jim....@sifive.com>
Co-developed-by: Andy Chiu <andy.c...@sifive.com>
---
target/riscv/insn16.decode | 4 ++++
1 file changed, 4 insertions(+)
diff --git a/target/riscv/insn16.decode b/target/riscv/insn16.decode
index 3953bcf82d..d9fb74fef6 100644
--- a/target/riscv/insn16.decode
+++ b/target/riscv/insn16.decode
@@ -69,10 +69,12 @@
# Formats 16:
@cr .... ..... ..... .. &r rs2=%rs2_5 rs1=%rd %rd
@ci ... . ..... ..... .. &i imm=%imm_ci rs1=%rd %rd
+@c_sspop ... . ..... ..... .. &i imm=0 rs1=5 rd=0
@cl_q ... . ..... ..... .. &i imm=%uimm_cl_q rs1=%rs1_3 rd=%rs2_3
@cl_d ... ... ... .. ... .. &i imm=%uimm_cl_d rs1=%rs1_3 rd=%rs2_3
@cl_w ... ... ... .. ... .. &i imm=%uimm_cl_w rs1=%rs1_3 rd=%rs2_3
@cs_2 ... ... ... .. ... .. &r rs2=%rs2_3 rs1=%rs1_3 rd=%rs1_3
+@c_sspush ... ... ... .. ... .. &s imm=0 rs1=0 rs2=1
@cs_q ... ... ... .. ... .. &s imm=%uimm_cl_q rs1=%rs1_3
rs2=%rs2_3
@cs_d ... ... ... .. ... .. &s imm=%uimm_cl_d rs1=%rs1_3
rs2=%rs2_3
@cs_w ... ... ... .. ... .. &s imm=%uimm_cl_w rs1=%rs1_3
rs2=%rs2_3
@@ -140,6 +142,8 @@ sw 110 ... ... .. ... 00 @cs_w
addi 000 . ..... ..... 01 @ci
addi 010 . ..... ..... 01 @c_li
{
+ sspush 011 0 00001 00000 01 @c_sspush # c.sspush x1 carving out
of zcmops
+ sspopchk 011 0 00101 00000 01 @c_sspop # c.sspopchk x5 carving out
of zcmops
c_mop_n 011 0 0 n:3 1 00000 01
illegal 011 0 ----- 00000 01 # c.addi16sp and c.lui, RES nzimm=0
addi 011 . 00010 ..... 01 @c_addi16sp
--
2.44.0
