Commit 6236f5b8105f4f5ae773190d18ebff2db90e34e5 | zig

author	Jakub Konka <kubkon@jakubkonka.com> 2024-02-21 23:40:44+01:00
committer	Jakub Konka <kubkon@jakubkonka.com> 2024-02-21 23:40:44+01:00
log	6236f5b8105f4f5ae773190d18ebff2db90e34e5
tree	2b5b9e5a3bb389abea35c365e5ff410968533105
parent	2ad2e2f6f5c327187b37619c0d7dd207c29916a1

1 files changed, 10 insertions(+), 6 deletions(-)

src/link/riscv.zig+10-6

...	...	@@ -32,7 +32,7 @@ pub fn writeInstU(code: *[4]u8, value: u32) void {
32	32	), code),
33	33	};
34	34	const compensated: u32 = @bitCast(@as(i32, @bitCast(value)) + 0x800);
35		inst.U.imm12_31 = @truncate(bitSlice(compensated, 31, 12));
	35	inst.U.imm12_31 = bitSlice(compensated, 31, 12);
36	36	mem.writeInt(u32, code, inst.toU32(), .little);
37	37	}
38	38
...	...	@@ -43,7 +43,7 @@ pub fn writeInstI(code: *[4]u8, value: u32) void {
43	43	Instruction.I,
44	44	), code),
45	45	};
46		inst.I.imm0_11 = @truncate(bitSlice(value, 11, 0));
	46	inst.I.imm0_11 = bitSlice(value, 11, 0);
47	47	mem.writeInt(u32, code, inst.toU32(), .little);
48	48	}
49	49
...	...	@@ -54,13 +54,17 @@ pub fn writeInstS(code: *[4]u8, value: u32) void {
54	54	Instruction.S,
55	55	), code),
56	56	};
57		inst.S.imm0_4 = @truncate(bitSlice(value, 4, 0));
58		inst.S.imm5_11 = @truncate(bitSlice(value, 11, 5));
	57	inst.S.imm0_4 = bitSlice(value, 4, 0);
	58	inst.S.imm5_11 = bitSlice(value, 11, 5);
59	59	mem.writeInt(u32, code, inst.toU32(), .little);
60	60	}
61	61
62		fn bitSlice(value: anytype, high: std.math.Log2Int(@TypeOf(value)), low: std.math.Log2Int(@TypeOf(value))) @TypeOf(value) {
63		return (value >> low) & ((@as(@TypeOf(value), 1) << (high - low + 1)) - 1);
	62	fn bitSlice(
	63	value: anytype,
	64	comptime high: comptime_int,
	65	comptime low: comptime_int,
	66	) std.math.IntFittingRange(0, 1 << high - low) {
	67	return @truncate((value >> low) & (1 << (high - low + 1)) - 1);
64	68	}
65	69
66	70	const bits = @import("../arch/riscv64/bits.zig");