| Message ID | 20240828174739.714313-18-debug@rivosinc.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | riscv support for control flow integrity extensions | expand |
On Thu, Aug 29, 2024 at 3:50 AM Deepak Gupta <debug@rivosinc.com> wrote: > > 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 <debug@rivosinc.com> > Co-developed-by: Jim Shu <jim.shu@sifive.com> > Co-developed-by: Andy Chiu <andy.chiu@sifive.com> > Reviewed-by: Richard Henderson <richard.henderson@linaro.org> Reviewed-by: Alistair Francis <alistair.francis@wdc.com> Alistair > --- > target/riscv/insn16.decode | 4 ++++ > 1 file changed, 4 insertions(+) > > diff --git a/target/riscv/insn16.decode b/target/riscv/insn16.decode > index 3953bcf82d..bf893d1c2e 100644 > --- a/target/riscv/insn16.decode > +++ b/target/riscv/insn16.decode > @@ -140,6 +140,10 @@ sw 110 ... ... .. ... 00 @cs_w > addi 000 . ..... ..... 01 @ci > addi 010 . ..... ..... 01 @c_li > { > + # c.sspush x1 carving out of zcmops > + sspush 011 0 00001 00000 01 &r2_s rs2=1 rs1=0 > + # c.sspopchk x5 carving out of zcmops > + sspopchk 011 0 00101 00000 01 &r2 rs1=5 rd=0 > 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 > >
diff --git a/target/riscv/insn16.decode b/target/riscv/insn16.decode index 3953bcf82d..bf893d1c2e 100644 --- a/target/riscv/insn16.decode +++ b/target/riscv/insn16.decode @@ -140,6 +140,10 @@ sw 110 ... ... .. ... 00 @cs_w addi 000 . ..... ..... 01 @ci addi 010 . ..... ..... 01 @c_li { + # c.sspush x1 carving out of zcmops + sspush 011 0 00001 00000 01 &r2_s rs2=1 rs1=0 + # c.sspopchk x5 carving out of zcmops + sspopchk 011 0 00101 00000 01 &r2 rs1=5 rd=0 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