authorgravatar for flandere@synkhronix.comFlandre Scarlet <flandere@synkhronix.com> 2022-03-14 06:43:33+07:00
committergravatar for koachan@protonmail.comKoakuma <koachan@protonmail.com> 2022-03-16 21:38:43+07:00
logf5a4d24cc0ddb65911a9ede1d364577afde696b4
tree0bf1755e7d1bd2297374043ee064b9678007f39d
parentf64ce3abaf4cad2ab158c754d1d818cd8c8ad1de

stage2 sparcv9: Add Format 4 encoder

1 files changed, 106 insertions(+), 0 deletions(-)

src/arch/sparcv9/bits.zig+106
......@@ -471,6 +471,7 @@ pub const Instruction = union(enum) {
471471 // TODO: Need to define an enum for `cond` values
472472 // This is kinda challenging since the cond values have different meanings
473473 // depending on whether it's operating on integer or FP CCR.
474 pub const Condition = u4;
474475
475476 pub fn toU32(self: Instruction) u32 {
476477 return @bitCast(u32, self);
......@@ -556,4 +557,109 @@ pub const Instruction = union(enum) {
556557 },
557558 };
558559 }
560
561 fn format4a(rd: Register, op3: u6, rs1: Register, cc: CCR, rs2: Register) Instruction {
562 const ccr_cc1 = @truncate(u1, @enumToInt(cc) >> 1);
563 const ccr_cc0 = @truncate(u1, @enumToInt(cc));
564 return Instruction{
565 .format4a = .{
566 .rd = rd.enc(),
567 .op3 = op3,
568 .rs1 = rs1.enc(),
569 .cc1 = ccr_cc1,
570 .cc0 = ccr_cc0,
571 .rs2 = rs2.enc(),
572 },
573 };
574 }
575
576 fn format4b(rd: Register, op3: u6, rs1: Register, cc: CCR, simm11: u11) Instruction {
577 const ccr_cc1 = @truncate(u1, @enumToInt(cc) >> 1);
578 const ccr_cc0 = @truncate(u1, @enumToInt(cc));
579 return Instruction{
580 .format4b = .{
581 .rd = rd.enc(),
582 .op3 = op3,
583 .rs1 = rs1.enc(),
584 .cc1 = ccr_cc1,
585 .cc0 = ccr_cc0,
586 .simm11 = simm11,
587 },
588 };
589 }
590
591 fn format4c(rd: Register, op3: u6, cc: CCR, cond: Condition, rs2: Register) Instruction {
592 const ccr_cc2 = @truncate(u1, @enumToInt(cc) >> 2);
593 const ccr_cc1 = @truncate(u1, @enumToInt(cc) >> 1);
594 const ccr_cc0 = @truncate(u1, @enumToInt(cc));
595 return Instruction{
596 .format4c = .{
597 .rd = rd.enc(),
598 .op3 = op3,
599 .cc2 = ccr_cc2,
600 .cond = cond,
601 .cc1 = ccr_cc1,
602 .cc0 = ccr_cc0,
603 .rs2 = rs2.enc(),
604 },
605 };
606 }
607
608 fn format4d(rd: Register, op3: u6, cc: CCR, cond: Condition, simm11: u11) Instruction {
609 const ccr_cc2 = @truncate(u1, @enumToInt(cc) >> 2);
610 const ccr_cc1 = @truncate(u1, @enumToInt(cc) >> 1);
611 const ccr_cc0 = @truncate(u1, @enumToInt(cc));
612 return Instruction{
613 .format4d = .{
614 .rd = rd.enc(),
615 .op3 = op3,
616 .cc2 = ccr_cc2,
617 .cond = cond,
618 .cc1 = ccr_cc1,
619 .cc0 = ccr_cc0,
620 .simm11 = simm11,
621 },
622 };
623 }
624
625 fn format4e(rd: Register, op3: u6, rs1: Register, cc: CCR, sw_trap: u7) Instruction {
626 const ccr_cc1 = @truncate(u1, @enumToInt(cc) >> 1);
627 const ccr_cc0 = @truncate(u1, @enumToInt(cc));
628 return Instruction{
629 .format4e = .{
630 .rd = rd.enc(),
631 .op3 = op3,
632 .rs1 = rs1.enc(),
633 .cc1 = ccr_cc1,
634 .cc0 = ccr_cc0,
635 .sw_trap = sw_trap,
636 },
637 };
638 }
639
640 fn format4f(rd: Register, op3: u6, rs1: Register, rcond: RCondition, opf_low: u5, rs2: Register) Instruction {
641 return Instruction{
642 .format4f = .{
643 .rd = rd.enc(),
644 .op3 = op3,
645 .rs1 = rs1.enc(),
646 .rcond = @enumToInt(rcond),
647 .opf_low = opf_low,
648 .rs2 = rs2.enc(),
649 },
650 };
651 }
652
653 fn format4g(rd: Register, op3: u6, cond: Condition, opf_cc: u3, opf_low: u6, rs2: Register) Instruction {
654 return Instruction{
655 .format4g = .{
656 .rd = rd.enc(),
657 .op3 = op3,
658 .cond = cond,
659 .opf_cc = opf_cc,
660 .opf_low = opf_low,
661 .rs2 = rs2.enc(),
662 },
663 };
664 }
559665};