authorgravatar for joachim.schmidt557@outlook.comJoachim Schmidt <joachim.schmidt557@outlook.com> 2021-12-26 17:05:08+01:00
committergravatar for joachim.schmidt557@outlook.comJoachim Schmidt <joachim.schmidt557@outlook.com> 2021-12-26 17:05:08+01:00
log8a0e86cd5cfd13792ce74ebac7a0cd20fb9e3c11
tree362af302cba25a78d169585b94419cc94c31e358
parent15f0f9240d1183e5c6c60006b5ff4e02d3d98ce7
signaturelock-open Commit is signed but in an unrecognized format.

stage2 ARM: implement load for types with size 8 (e.g. slices)

1 files changed, 31 insertions(+), 2 deletions(-)

src/arch/arm/CodeGen.zig+31-2
...@@ -1317,8 +1317,37 @@ fn load(self: *Self, dst_mcv: MCValue, ptr: MCValue, ptr_ty: Type) InnerError!vo...@@ -1317,8 +1317,37 @@ fn load(self: *Self, dst_mcv: MCValue, ptr: MCValue, ptr_ty: Type) InnerError!vo
1317 .stack_offset => |off| {1317 .stack_offset => |off| {
1318 if (elem_ty.abiSize(self.target.*) <= 4) {1318 if (elem_ty.abiSize(self.target.*) <= 4) {
1319 const tmp_reg = try self.register_manager.allocReg(null, &.{});1319 const tmp_reg = try self.register_manager.allocReg(null, &.{});
1320 try self.load(.{ .register = tmp_reg }, ptr, elem_ty);1320 try self.load(.{ .register = tmp_reg }, ptr, ptr_ty);
1321 return self.genSetStack(elem_ty, off, MCValue{ .register = tmp_reg });1321 try self.genSetStack(elem_ty, off, MCValue{ .register = tmp_reg });
1322 } else if (elem_ty.abiSize(self.target.*) == 8) {
1323 // TODO generalize this: maybe add a
1324 // genArmMemcpy function which manually copies
1325 // data if the size is below a certain
1326 // threshold and calls "memcpy" if the size is
1327 // larger
1328
1329 const usize_ty = Type.initTag(.usize);
1330 const tmp_regs = try self.register_manager.allocRegs(2, .{ null, null }, &.{});
1331 _ = try self.addInst(.{
1332 .tag = .ldr,
1333 .cond = .al,
1334 .data = .{ .rr_offset = .{
1335 .rt = tmp_regs[0],
1336 .rn = reg,
1337 .offset = .{ .offset = Instruction.Offset.none },
1338 } },
1339 });
1340 _ = try self.addInst(.{
1341 .tag = .ldr,
1342 .cond = .al,
1343 .data = .{ .rr_offset = .{
1344 .rt = tmp_regs[1],
1345 .rn = reg,
1346 .offset = .{ .offset = Instruction.Offset.imm(4) },
1347 } },
1348 });
1349 try self.genSetStack(usize_ty, off, MCValue{ .register = tmp_regs[0] });
1350 try self.genSetStack(usize_ty, off + 4, MCValue{ .register = tmp_regs[1] });
1322 } else {1351 } else {
1323 return self.fail("TODO implement memcpy", .{});1352 return self.fail("TODO implement memcpy", .{});
1324 }1353 }