motiejus/zig
1
Fork 0
Code Releases Activity

stage2 AArch64: add logical (shifted register) instructions

Browse Source
This commit is contained in:
joachimschmidt557
2020-11-14 18:25:23 +01:00
committed by Andrew Kelley
parent 6c0c275b27
commit c5ec096b2f
2 changed files with 125 additions and 98 deletions
Download Patch File Download Diff File Expand all files Collapse all files

23
src/codegen.zig
View File

@@ -2415,19 +2415,10 @@ fn Function(comptime arch: std.Target.Cpu.Arch) type {
try self.genSetReg(inst.base.src, reg, arg);
}
// TODO move this to lib/std/{elf, macho}.zig, etc.
const is_syscall_inst = switch (self.bin_file.tag) {
.macho => mem.eql(u8, inst.asm_source, "svc #0x80"),
.elf => mem.eql(u8, inst.asm_source, "svc #0"),
else => |tag| return self.fail(inst.base.src, "TODO implement aarch64 support for other syscall instructions for file format: '{}'", .{tag}),
};
if (is_syscall_inst) {
const imm16: u16 = switch (self.bin_file.tag) {
.macho => 0x80,
.elf => 0,
else => unreachable,
};
mem.writeIntLittle(u32, try self.code.addManyAsArray(4), Instruction.svc(imm16).toU32());
if (mem.eql(u8, inst.asm_source, "svc #0")) {
mem.writeIntLittle(u32, try self.code.addManyAsArray(4), Instruction.svc(0x0).toU32());
} else if (mem.eql(u8, inst.asm_source, "svc #0x80")) {
mem.writeIntLittle(u32, try self.code.addManyAsArray(4), Instruction.svc(0x80).toU32());
} else {
return self.fail(inst.base.src, "TODO implement support for more aarch64 assembly instructions", .{});
}
@@ -2876,8 +2867,9 @@ fn Function(comptime arch: std.Target.Cpu.Arch) type {
// mov r, x0
mem.writeIntLittle(u32, try self.code.addManyAsArray(4), Instruction.orr(
reg,
.xzr,
.x0,
Instruction.RegisterShift.none(),
Instruction.Shift.none,
).toU32());
// ldr x28, [sp], #16
mem.writeIntLittle(u32, try self.code.addManyAsArray(4), Instruction.ldr(.x28, .{
@@ -2908,8 +2900,9 @@ fn Function(comptime arch: std.Target.Cpu.Arch) type {
// mov r, x0
mem.writeIntLittle(u32, try self.code.addManyAsArray(4), Instruction.orr(
reg,
.xzr,
.x0,
Instruction.RegisterShift.none(),
Instruction.Shift.none,
).toU32());
// ldp x0, x28, [sp, #16]
mem.writeIntLittle(u32, try self.code.addManyAsArray(4), Instruction.ldp(