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stage2 sparcv9: Add Format 4 encoder

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Flandre Scarlet 2022-03-14 06:43:33 +07:00 committed by Koakuma
parent f64ce3abaf
commit f5a4d24cc0
1 changed files with 106 additions and 0 deletions
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106
src/arch/sparcv9/bits.zig
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@ -471,6 +471,7 @@ pub const Instruction = union(enum) {
// TODO: Need to define an enum for `cond` values
// This is kinda challenging since the cond values have different meanings
// depending on whether it's operating on integer or FP CCR.
pub const Condition = u4;
pub fn toU32(self: Instruction) u32 {
return @bitCast(u32, self);
@ -556,4 +557,109 @@ pub const Instruction = union(enum) {
},
};
}
fn format4a(rd: Register, op3: u6, rs1: Register, cc: CCR, rs2: Register) Instruction {
const ccr_cc1 = @truncate(u1, @enumToInt(cc) >> 1);
const ccr_cc0 = @truncate(u1, @enumToInt(cc));
return Instruction{
.format4a = .{
.rd = rd.enc(),
.op3 = op3,
.rs1 = rs1.enc(),
.cc1 = ccr_cc1,
.cc0 = ccr_cc0,
.rs2 = rs2.enc(),
},
};
}
fn format4b(rd: Register, op3: u6, rs1: Register, cc: CCR, simm11: u11) Instruction {
const ccr_cc1 = @truncate(u1, @enumToInt(cc) >> 1);
const ccr_cc0 = @truncate(u1, @enumToInt(cc));
return Instruction{
.format4b = .{
.rd = rd.enc(),
.op3 = op3,
.rs1 = rs1.enc(),
.cc1 = ccr_cc1,
.cc0 = ccr_cc0,
.simm11 = simm11,
},
};
}
fn format4c(rd: Register, op3: u6, cc: CCR, cond: Condition, rs2: Register) Instruction {
const ccr_cc2 = @truncate(u1, @enumToInt(cc) >> 2);
const ccr_cc1 = @truncate(u1, @enumToInt(cc) >> 1);
const ccr_cc0 = @truncate(u1, @enumToInt(cc));
return Instruction{
.format4c = .{
.rd = rd.enc(),
.op3 = op3,
.cc2 = ccr_cc2,
.cond = cond,
.cc1 = ccr_cc1,
.cc0 = ccr_cc0,
.rs2 = rs2.enc(),
},
};
}
fn format4d(rd: Register, op3: u6, cc: CCR, cond: Condition, simm11: u11) Instruction {
const ccr_cc2 = @truncate(u1, @enumToInt(cc) >> 2);
const ccr_cc1 = @truncate(u1, @enumToInt(cc) >> 1);
const ccr_cc0 = @truncate(u1, @enumToInt(cc));
return Instruction{
.format4d = .{
.rd = rd.enc(),
.op3 = op3,
.cc2 = ccr_cc2,
.cond = cond,
.cc1 = ccr_cc1,
.cc0 = ccr_cc0,
.simm11 = simm11,
},
};
}
fn format4e(rd: Register, op3: u6, rs1: Register, cc: CCR, sw_trap: u7) Instruction {
const ccr_cc1 = @truncate(u1, @enumToInt(cc) >> 1);
const ccr_cc0 = @truncate(u1, @enumToInt(cc));
return Instruction{
.format4e = .{
.rd = rd.enc(),
.op3 = op3,
.rs1 = rs1.enc(),
.cc1 = ccr_cc1,
.cc0 = ccr_cc0,
.sw_trap = sw_trap,
},
};
}
fn format4f(rd: Register, op3: u6, rs1: Register, rcond: RCondition, opf_low: u5, rs2: Register) Instruction {
return Instruction{
.format4f = .{
.rd = rd.enc(),
.op3 = op3,
.rs1 = rs1.enc(),
.rcond = @enumToInt(rcond),
.opf_low = opf_low,
.rs2 = rs2.enc(),
},
};
}
fn format4g(rd: Register, op3: u6, cond: Condition, opf_cc: u3, opf_low: u6, rs2: Register) Instruction {
return Instruction{
.format4g = .{
.rd = rd.enc(),
.op3 = op3,
.cond = cond,
.opf_cc = opf_cc,
.opf_low = opf_low,
.rs2 = rs2.enc(),
},
};
}
};