authorgravatar for thatlemon@gmail.comLemonBoy <thatlemon@gmail.com> 2019-05-10 13:25:54+02:00
committergravatar for thatlemon@gmail.comLemonBoy <thatlemon@gmail.com> 2019-05-10 13:26:33+02:00
log7fb55ce2bbbe51f4becaef257b72c95e7d078c19
treecd48b97ff417c9c87b25d5845a1fabb585213c89
parentfbffece1b5b46d0102011baf9a605fc1a4bec2f2

compiler-rt: Add __ashrti3

4 files changed, 102 insertions(+), 0 deletions(-)

CMakeLists.txt+1
......@@ -696,6 +696,7 @@ set(ZIG_STD_FILES
696696 "special/compiler_rt/mulodi4.zig"
697697 "special/compiler_rt/multi3.zig"
698698 "special/compiler_rt/ashlti3.zig"
699 "special/compiler_rt/ashrti3.zig"
699700 "special/compiler_rt/lshrti3.zig"
700701 "special/compiler_rt/negXf2.zig"
701702 "special/compiler_rt/popcountdi2.zig"
std/special/compiler_rt.zig+1
......@@ -64,6 +64,7 @@ comptime {
6464
6565 @export("__ashlti3", @import("compiler_rt/ashlti3.zig").__ashlti3, linkage);
6666 @export("__lshrti3", @import("compiler_rt/lshrti3.zig").__lshrti3, linkage);
67 @export("__ashrti3", @import("compiler_rt/ashrti3.zig").__ashrti3, linkage);
6768
6869 @export("__floatsidf", @import("compiler_rt/floatsiXf.zig").__floatsidf, linkage);
6970 @export("__floatsisf", @import("compiler_rt/floatsiXf.zig").__floatsisf, linkage);
std/special/compiler_rt/ashrti3.zig created+42
......@@ -0,0 +1,42 @@
1const builtin = @import("builtin");
2const compiler_rt = @import("../compiler_rt.zig");
3
4pub extern fn __ashrti3(a: i128, b: i32) i128 {
5 var input = twords{ .all = a };
6 var result: twords = undefined;
7
8 if (b > 63) {
9 // 64 <= b < 128
10 result.s.low = input.s.high >> @intCast(u6, b - 64);
11 result.s.high = input.s.high >> 63;
12 } else {
13 // 0 <= b < 64
14 if (b == 0) return a;
15 result.s.low = input.s.high << @intCast(u6, 64 - b);
16 // Avoid sign-extension here
17 result.s.low |= @bitCast(i64, @bitCast(u64, input.s.low) >> @intCast(u6, b));
18 result.s.high = input.s.high >> @intCast(u6, b);
19 }
20
21 return result.all;
22}
23
24const twords = extern union {
25 all: i128,
26 s: S,
27
28 const S = if (builtin.endian == builtin.Endian.Little)
29 struct {
30 low: i64,
31 high: i64,
32 }
33 else
34 struct {
35 high: i64,
36 low: i64,
37 };
38};
39
40test "import ashrti3" {
41 _ = @import("ashrti3_test.zig");
42}
std/special/compiler_rt/ashrti3_test.zig created+58
......@@ -0,0 +1,58 @@
1const __ashrti3 = @import("ashrti3.zig").__ashrti3;
2const testing = @import("std").testing;
3
4fn test__ashrti3(a: i128, b: i32, expected: i128) void {
5 const x = __ashrti3(a, b);
6 // @import("std").debug.warn("got 0x{x}\nexp 0x{x}\n", @truncate(u64,
7// @bitCast(u128, x) >> 64), @truncate(u64, @bitCast(u128, expected)) >> 64);
8 testing.expect(x == expected);
9}
10
11test "ashrti3" {
12 test__ashrti3(@bitCast(i128, @intCast(u128, 0xFEDCBA9876543215FEDCBA9876543215)), 0, @bitCast(i128, @intCast(u128, 0xFEDCBA9876543215FEDCBA9876543215)));
13 test__ashrti3(@bitCast(i128, @intCast(u128, 0xFEDCBA9876543215FEDCBA9876543215)), 1, @bitCast(i128, @intCast(u128, 0xFF6E5D4C3B2A190AFF6E5D4C3B2A190A)));
14 test__ashrti3(@bitCast(i128, @intCast(u128, 0xFEDCBA9876543215FEDCBA9876543215)), 2, @bitCast(i128, @intCast(u128, 0xFFB72EA61D950C857FB72EA61D950C85)));
15 test__ashrti3(@bitCast(i128, @intCast(u128, 0xFEDCBA9876543215FEDCBA9876543215)), 3, @bitCast(i128, @intCast(u128, 0xFFDB97530ECA8642BFDB97530ECA8642)));
16 test__ashrti3(@bitCast(i128, @intCast(u128, 0xFEDCBA9876543215FEDCBA9876543215)), 4, @bitCast(i128, @intCast(u128, 0xFFEDCBA9876543215FEDCBA987654321)));
17
18 test__ashrti3(@bitCast(i128, @intCast(u128, 0xFEDCBA9876543215FEDCBA9876543215)), 28, @bitCast(i128, @intCast(u128, 0xFFFFFFFFEDCBA9876543215FEDCBA987)));
19 test__ashrti3(@bitCast(i128, @intCast(u128, 0xFEDCBA9876543215FEDCBA9876543215)), 29, @bitCast(i128, @intCast(u128, 0xFFFFFFFFF6E5D4C3B2A190AFF6E5D4C3)));
20 test__ashrti3(@bitCast(i128, @intCast(u128, 0xFEDCBA9876543215FEDCBA9876543215)), 30, @bitCast(i128, @intCast(u128, 0xFFFFFFFFFB72EA61D950C857FB72EA61)));
21 test__ashrti3(@bitCast(i128, @intCast(u128, 0xFEDCBA9876543215FEDCBA9876543215)), 31, @bitCast(i128, @intCast(u128, 0xFFFFFFFFFDB97530ECA8642BFDB97530)));
22
23 test__ashrti3(@bitCast(i128, @intCast(u128, 0xFEDCBA9876543215FEDCBA9876543215)), 32, @bitCast(i128, @intCast(u128, 0xFFFFFFFFFEDCBA9876543215FEDCBA98)));
24
25 test__ashrti3(@bitCast(i128, @intCast(u128, 0xFEDCBA9876543215FEDCBA9876543215)), 33, @bitCast(i128, @intCast(u128, 0xFFFFFFFFFF6E5D4C3B2A190AFF6E5D4C)));
26 test__ashrti3(@bitCast(i128, @intCast(u128, 0xFEDCBA9876543215FEDCBA9876543215)), 34, @bitCast(i128, @intCast(u128, 0xFFFFFFFFFFB72EA61D950C857FB72EA6)));
27 test__ashrti3(@bitCast(i128, @intCast(u128, 0xFEDCBA9876543215FEDCBA9876543215)), 35, @bitCast(i128, @intCast(u128, 0xFFFFFFFFFFDB97530ECA8642BFDB9753)));
28 test__ashrti3(@bitCast(i128, @intCast(u128, 0xFEDCBA9876543215FEDCBA9876543215)), 36, @bitCast(i128, @intCast(u128, 0xFFFFFFFFFFEDCBA9876543215FEDCBA9)));
29
30 test__ashrti3(@bitCast(i128, @intCast(u128, 0xFEDCBA9876543215FEDCBA9876543215)), 60, @bitCast(i128, @intCast(u128, 0xFFFFFFFFFFFFFFFFEDCBA9876543215F)));
31 test__ashrti3(@bitCast(i128, @intCast(u128, 0xFEDCBA9876543215FEDCBA9876543215)), 61, @bitCast(i128, @intCast(u128, 0xFFFFFFFFFFFFFFFFF6E5D4C3B2A190AF)));
32 test__ashrti3(@bitCast(i128, @intCast(u128, 0xFEDCBA9876543215FEDCBA9876543215)), 62, @bitCast(i128, @intCast(u128, 0xFFFFFFFFFFFFFFFFFB72EA61D950C857)));
33 test__ashrti3(@bitCast(i128, @intCast(u128, 0xFEDCBA9876543215FEDCBA9876543215)), 63, @bitCast(i128, @intCast(u128, 0xFFFFFFFFFFFFFFFFFDB97530ECA8642B)));
34
35 test__ashrti3(@bitCast(i128, @intCast(u128, 0xFEDCBA9876543215FEDCBA9876543215)), 64, @bitCast(i128, @intCast(u128, 0xFFFFFFFFFFFFFFFFFEDCBA9876543215)));
36
37 test__ashrti3(@bitCast(i128, @intCast(u128, 0xFEDCBA9876543215FEDCBA9876543215)), 65, @bitCast(i128, @intCast(u128, 0xFFFFFFFFFFFFFFFFFF6E5D4C3B2A190A)));
38 test__ashrti3(@bitCast(i128, @intCast(u128, 0xFEDCBA9876543215FEDCBA9876543215)), 66, @bitCast(i128, @intCast(u128, 0xFFFFFFFFFFFFFFFFFFB72EA61D950C85)));
39 test__ashrti3(@bitCast(i128, @intCast(u128, 0xFEDCBA9876543215FEDCBA9876543215)), 67, @bitCast(i128, @intCast(u128, 0xFFFFFFFFFFFFFFFFFFDB97530ECA8642)));
40 test__ashrti3(@bitCast(i128, @intCast(u128, 0xFEDCBA9876543215FEDCBA9876543215)), 68, @bitCast(i128, @intCast(u128, 0xFFFFFFFFFFFFFFFFFFEDCBA987654321)));
41
42 test__ashrti3(@bitCast(i128, @intCast(u128, 0xFEDCBA9876543215FEDCBA9876543215)), 92, @bitCast(i128, @intCast(u128, 0xFFFFFFFFFFFFFFFFFFFFFFFFEDCBA987)));
43 test__ashrti3(@bitCast(i128, @intCast(u128, 0xFEDCBA9876543215FEDCBA9876543215)), 93, @bitCast(i128, @intCast(u128, 0xFFFFFFFFFFFFFFFFFFFFFFFFF6E5D4C3)));
44 test__ashrti3(@bitCast(i128, @intCast(u128, 0xFEDCBA9876543215FEDCBA9876543215)), 94, @bitCast(i128, @intCast(u128, 0xFFFFFFFFFFFFFFFFFFFFFFFFFB72EA61)));
45 test__ashrti3(@bitCast(i128, @intCast(u128, 0xFEDCBA9876543215FEDCBA9876543215)), 95, @bitCast(i128, @intCast(u128, 0xFFFFFFFFFFFFFFFFFFFFFFFFFDB97530)));
46
47 test__ashrti3(@bitCast(i128, @intCast(u128, 0xFEDCBA9876543215FEDCBA9876543215)), 96, @bitCast(i128, @intCast(u128, 0xFFFFFFFFFFFFFFFFFFFFFFFFFEDCBA98)));
48
49 test__ashrti3(@bitCast(i128, @intCast(u128, 0xFEDCBA9876543215FEDCBA9876543215)), 97, @bitCast(i128, @intCast(u128, 0xFFFFFFFFFFFFFFFFFFFFFFFFFF6E5D4C)));
50 test__ashrti3(@bitCast(i128, @intCast(u128, 0xFEDCBA9876543215FEDCBA9876543215)), 98, @bitCast(i128, @intCast(u128, 0xFFFFFFFFFFFFFFFFFFFFFFFFFFB72EA6)));
51 test__ashrti3(@bitCast(i128, @intCast(u128, 0xFEDCBA9876543215FEDCBA9876543215)), 99, @bitCast(i128, @intCast(u128, 0xFFFFFFFFFFFFFFFFFFFFFFFFFFDB9753)));
52 test__ashrti3(@bitCast(i128, @intCast(u128, 0xFEDCBA9876543215FEDCBA9876543215)), 100, @bitCast(i128, @intCast(u128, 0xFFFFFFFFFFFFFFFFFFFFFFFFFFEDCBA9)));
53
54 test__ashrti3(@bitCast(i128, @intCast(u128, 0xFEDCBA9876543215FEDCBA9876543215)), 124, @bitCast(i128, @intCast(u128, 0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF)));
55 test__ashrti3(@bitCast(i128, @intCast(u128, 0xFEDCBA9876543215FEDCBA9876543215)), 125, @bitCast(i128, @intCast(u128, 0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF)));
56 test__ashrti3(@bitCast(i128, @intCast(u128, 0xFEDCBA9876543215FEDCBA9876543215)), 126, @bitCast(i128, @intCast(u128, 0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF)));
57 test__ashrti3(@bitCast(i128, @intCast(u128, 0xFEDCBA9876543215FEDCBA9876543215)), 127, @bitCast(i128, @intCast(u128, 0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF)));
58}