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riscv: math progress

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This commit is contained in:
David Rubin
2024-04-16 16:39:31 -07:00
parent a615fbc1f8
commit a30af172e8
32 changed files with 73 additions and 191 deletions
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6
src/arch/riscv64/Encoding.zig
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@@ -16,6 +16,7 @@ pub const Mnemonic = enum {
andi,
slli,
srli,
srai,
addi,
jalr,
@@ -69,6 +70,7 @@ pub const Mnemonic = enum {
.jalr => .{ .opcode = 0b1100111, .funct3 = 0b000, .funct7 = null },
.slli => .{ .opcode = 0b0010011, .funct3 = 0b001, .funct7 = null },
.srli => .{ .opcode = 0b0010011, .funct3 = 0b101, .funct7 = null },
.srai => .{ .opcode = 0b0010011, .funct3 = 0b101, .funct7 = null, .offset = 1 << 10 },
.lui => .{ .opcode = 0b0110111, .funct3 = null, .funct7 = null },
@@ -123,6 +125,7 @@ pub const InstEnc = enum {
.andi,
.slli,
.srli,
.srai,
=> .I,
.lui,
@@ -299,7 +302,7 @@ pub const Data = union(InstEnc) {
.I = .{
.rd = ops[0].reg.id(),
.rs1 = ops[1].reg.id(),
.imm0_11 = ops[2].imm.asBits(u12),
.imm0_11 = ops[2].imm.asBits(u12) + enc.offset,
.opcode = enc.opcode,
.funct3 = enc.funct3.?,
@@ -374,6 +377,7 @@ const Enc = struct {
opcode: u7,
funct3: ?u3,
funct7: ?u7,
offset: u12 = 0,
};
fn verifyOps(mnem: Mnemonic, ops: []const Operand) bool {