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x86_64: simplify genInlineMemset() when setting value in memory

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This commit is contained in:
Jakub Konka 2023-04-12 10:36:00 +02:00
parent 4e3573955f
commit e07120d704
1 changed files with 16 additions and 2 deletions
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18
src/arch/x86_64/CodeGen.zig
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@ -7564,11 +7564,25 @@ fn genInlineMemset(
try self.spillRegisters(&.{ .rdi, .al, .rcx });
switch (dst_ptr) {
.memory, .linker_load => {
try self.loadMemPtrIntoRegister(.rdi, Type.usize, dst_ptr);
.memory => |addr| {
try self.genSetReg(Type.usize, .rdi, .{ .immediate = addr });
// Load the pointer, which is stored in memory
try self.asmRegisterMemory(.mov, .rdi, Memory.sib(.qword, .{ .base = .rdi }));
},
.linker_load => |load_struct| {
const atom_index = if (self.bin_file.cast(link.File.MachO)) |macho_file| blk: {
const atom = try macho_file.getOrCreateAtomForDecl(self.mod_fn.owner_decl);
break :blk macho_file.getAtom(atom).getSymbolIndex().?;
} else if (self.bin_file.cast(link.File.Coff)) |coff_file| blk: {
const atom = try coff_file.getOrCreateAtomForDecl(self.mod_fn.owner_decl);
break :blk coff_file.getAtom(atom).getSymbolIndex().?;
} else unreachable;
switch (load_struct.type) {
.import => unreachable,
.got, .direct => try self.asmMovLinker(.rdi, atom_index, load_struct),
}
},
.stack_offset, .ptr_stack_offset => |off| {
try self.asmRegisterMemory(switch (dst_ptr) {
.stack_offset => .mov,