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cmp.zig (1971B) - Raw

      1 const std = @import("std");
      2 const builtin = @import("builtin");
      3 const common = @import("common.zig");
      4 
      5 pub const panic = common.panic;
      6 
      7 comptime {
      8     @export(&__cmpsi2, .{ .name = "__cmpsi2", .linkage = common.linkage, .visibility = common.visibility });
      9     @export(&__cmpdi2, .{ .name = "__cmpdi2", .linkage = common.linkage, .visibility = common.visibility });
     10     @export(&__cmpti2, .{ .name = "__cmpti2", .linkage = common.linkage, .visibility = common.visibility });
     11     @export(&__ucmpsi2, .{ .name = "__ucmpsi2", .linkage = common.linkage, .visibility = common.visibility });
     12     @export(&__ucmpdi2, .{ .name = "__ucmpdi2", .linkage = common.linkage, .visibility = common.visibility });
     13     @export(&__ucmpti2, .{ .name = "__ucmpti2", .linkage = common.linkage, .visibility = common.visibility });
     14 }
     15 
     16 // cmp - signed compare
     17 // - cmpXi2_generic for unoptimized little and big endian
     18 
     19 // ucmp - unsigned compare
     20 // - ucmpXi2_generic for unoptimized little and big endian
     21 
     22 // a <  b => 0
     23 // a == b => 1
     24 // a >  b => 2
     25 
     26 inline fn XcmpXi2(comptime T: type, a: T, b: T) i32 {
     27     var cmp1: i32 = 0;
     28     var cmp2: i32 = 0;
     29     if (a > b)
     30         cmp1 = 1;
     31     if (a < b)
     32         cmp2 = 1;
     33     return cmp1 - cmp2 + 1;
     34 }
     35 
     36 pub fn __cmpsi2(a: i32, b: i32) callconv(.c) i32 {
     37     return XcmpXi2(i32, a, b);
     38 }
     39 
     40 pub fn __cmpdi2(a: i64, b: i64) callconv(.c) i32 {
     41     return XcmpXi2(i64, a, b);
     42 }
     43 
     44 pub fn __cmpti2(a: i128, b: i128) callconv(.c) i32 {
     45     return XcmpXi2(i128, a, b);
     46 }
     47 
     48 pub fn __ucmpsi2(a: u32, b: u32) callconv(.c) i32 {
     49     return XcmpXi2(u32, a, b);
     50 }
     51 
     52 pub fn __ucmpdi2(a: u64, b: u64) callconv(.c) i32 {
     53     return XcmpXi2(u64, a, b);
     54 }
     55 
     56 pub fn __ucmpti2(a: u128, b: u128) callconv(.c) i32 {
     57     return XcmpXi2(u128, a, b);
     58 }
     59 
     60 test {
     61     _ = @import("cmpsi2_test.zig");
     62     _ = @import("cmpdi2_test.zig");
     63     _ = @import("cmpti2_test.zig");
     64 
     65     _ = @import("ucmpsi2_test.zig");
     66     _ = @import("ucmpdi2_test.zig");
     67     _ = @import("ucmpti2_test.zig");
     68 }