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[PATCH v8 15/17] target/riscv: compressed encodings for sspush and sspop
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From: |
Deepak Gupta |
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Subject: |
[PATCH v8 15/17] target/riscv: compressed encodings for sspush and sspopchk |
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Date: |
Fri, 23 Aug 2024 12:01:37 -0700 |
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(+)
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
- [PATCH v8 08/17] target/riscv: Add zicfiss extension, (continued)
- [PATCH v8 08/17] target/riscv: Add zicfiss extension, Deepak Gupta, 2024/08/23
- [PATCH v8 02/17] target/riscv: Introduce elp state and enabling controls for zicfilp, Deepak Gupta, 2024/08/23
- [PATCH v8 04/17] target/riscv: additional code information for sw check, Deepak Gupta, 2024/08/23
- [PATCH v8 07/17] disas/riscv: enable `lpad` disassembly, Deepak Gupta, 2024/08/23
- [PATCH v8 06/17] target/riscv: zicfilp `lpad` impl and branch tracking, Deepak Gupta, 2024/08/23
- [PATCH v8 11/17] target/riscv: mmu changes for zicfiss shadow stack protection, Deepak Gupta, 2024/08/23
- [PATCH v8 10/17] target/riscv: tb flag for shadow stack instructions, Deepak Gupta, 2024/08/23
- [PATCH v8 12/17] target/riscv: AMO operations always raise store/AMO fault, Deepak Gupta, 2024/08/23
- [PATCH v8 09/17] target/riscv: introduce ssp and enabling controls for zicfiss, Deepak Gupta, 2024/08/23
- [PATCH v8 13/17] target/riscv: update `decode_save_opc` to store extra word2, Deepak Gupta, 2024/08/23
- [PATCH v8 15/17] target/riscv: compressed encodings for sspush and sspopchk,
Deepak Gupta <=
- [PATCH v8 14/17] target/riscv: implement zicfiss instructions, Deepak Gupta, 2024/08/23
- [PATCH v8 17/17] disas/riscv: enable disassembly for compressed sspush/sspopchk, Deepak Gupta, 2024/08/23
- [PATCH v8 16/17] disas/riscv: enable disassembly for zicfiss instructions, Deepak Gupta, 2024/08/23