| Message ID | 20240826152949.294506-16-debug@rivosinc.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | riscv support for control flow integrity extensions | expand |
On 8/27/24 01:29, Deepak Gupta 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> > --- > target/riscv/insn16.decode | 4 ++++ > 1 file changed, 4 insertions(+) Reviewed-by: Richard Henderson <richard.henderson@linaro.org> r~
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
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> --- target/riscv/insn16.decode | 4 ++++ 1 file changed, 4 insertions(+)