From: Deepak Gupta Date: Tue, 8 Oct 2024 22:50:07 +0000 (-0700) Subject: target/riscv: compressed encodings for sspush and sspopchk X-Git-Tag: v9.2.0-rc0~28^2~18 X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=905c032417ca90776df840cdef696c633f420868;p=thirdparty%2Fqemu.git target/riscv: compressed encodings for sspush and sspopchk 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 Co-developed-by: Jim Shu Co-developed-by: Andy Chiu Reviewed-by: Richard Henderson Reviewed-by: Alistair Francis Message-ID: <20241008225010.1861630-18-debug@rivosinc.com> Signed-off-by: Alistair Francis --- diff --git a/target/riscv/insn16.decode b/target/riscv/insn16.decode index 3953bcf82d6..bf893d1c2e9 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