Jerin Joy has uploaded this change for review. (
https://gem5-review.googlesource.com/c/public/gem5/+/58632 )
Change subject: arch-riscv: Added the Zbs bitmanip instructions
......................................................................
arch-riscv: Added the Zbs bitmanip instructions
Added the bclr, bclri, bext, bexti, binv, binvi, bset, bseti
instructions.
Change-Id: I126d659d973b250b642bd56b3b149f0ee6a3323e
Signed-off-by: Jerin Joy <j...@rivosinc.com>
---
M src/arch/riscv/isa/decoder.isa
1 file changed, 50 insertions(+), 3 deletions(-)
diff --git a/src/arch/riscv/isa/decoder.isa b/src/arch/riscv/isa/decoder.isa
index e1f540c..17258d0 100644
--- a/src/arch/riscv/isa/decoder.isa
+++ b/src/arch/riscv/isa/decoder.isa
@@ -432,9 +432,23 @@
0x04: decode FUNCT3 {
0x1: decode FS3 {
- 0x00: IOp::slli({{
- Rd = Rs1 << imm;
- }}, imm_type = uint64_t, imm_code = {{ imm = SHAMT6; }});
+ format IOp {
+ 0x00: slli({{
+ Rd = Rs1 << imm;
+ }}, imm_type = uint64_t, imm_code = {{ imm = SHAMT6;
}});
+ 0x05: bseti({{
+ uint64_t index = imm & (64 - 1);
+ Rd = Rs1 | (UINT64_C(1) << index);
+ }}, imm_type = uint64_t, imm_code = {{ imm = SHAMT6;
}});
+ 0x09: bclri({{
+ uint64_t index = imm & (64 - 1);
+ Rd = Rs1 & (~(UINT64_C(1) << index));
+ }}, imm_type = uint64_t, imm_code = {{ imm = SHAMT6;
}});
+ 0x0d: binvi({{
+ uint64_t index = imm & (64 - 1);
+ Rd = Rs1 ^ (UINT64_C(1) << index);
+ }}, imm_type = uint64_t, imm_code = {{ imm = SHAMT6;
}});
+ }
format ROp {
0x0c: decode RS2 {
0x00: clz({{
@@ -487,6 +501,10 @@
0x8: srai({{
Rd_sd = Rs1_sd >> imm;
}}, imm_type = uint64_t, imm_code = {{ imm = SHAMT6;
}});
+ 0x9: bexti({{
+ uint64_t index = imm & (64 - 1);
+ Rd = (Rs1 >> index) & 0x1;
+ }}, imm_type = uint64_t, imm_code = {{ imm = SHAMT6;
}});
0xc: rori({{
Rd = (Rs1 >> imm) | (Rs1 << ((64 - imm) & (64 -
1)));
}}, imm_type = uint64_t, imm_code = {{ imm = SHAMT6;
}});
@@ -782,10 +800,22 @@
}
}
}});
+ 0x14: bset({{
+ Rs2 &= (64 - 1);
+ Rd = Rs1 | (UINT64_C(1) << Rs2);
+ }});
+ 0x24: bclr({{
+ Rs2 &= (64 - 1);
+ Rd = Rs1 & (~(UINT64_C(1) << Rs2));
+ }});
0x30: rol({{
int shamt = Rs2 & (64 - 1);
Rd = (Rs1 << shamt) | (Rs1 >> ((64 - shamt) & (64
- 1)));
}});
+ 0x34: binv({{
+ Rs2 &= (64 - 1);
+ Rd = Rs1 ^ (UINT64_C(1) << Rs2);
+ }});
}
0x2: decode FUNCT7 {
0x0: slt({{
@@ -893,6 +923,10 @@
0x5: minu({{
Rd = Rs1 < Rs2 ? Rs1 : Rs2;
}});
+ 0x24: bext({{
+ Rs2 &= (64 - 1);
+ Rd = (Rs1 >> Rs2) & 0x1;
+ }});
0x30: ror({{
int shamt = Rs2 & (64 - 1);
Rd = (Rs1 >> shamt) | (Rs1 << ((64 - shamt) & (64
- 1)));
--
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Gerrit-Project: public/gem5
Gerrit-Branch: develop
Gerrit-Change-Id: I126d659d973b250b642bd56b3b149f0ee6a3323e
Gerrit-Change-Number: 58632
Gerrit-PatchSet: 1
Gerrit-Owner: Jerin Joy <j...@rivosinc.com>
Gerrit-MessageType: newchange
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