zig/lib/compiler_rt/negsi2_test.zig
Andrew Kelley ec95e00e28 flatten lib/std/special and improve "pkg inside another" logic
stage2: change logic for detecting whether the main package is inside
the std package. Previously it relied on realpath() which is not portable.
This uses resolve() which is how imports already work.

 * stage2: fix cleanup bug when creating Module
 * flatten lib/std/special/* to lib/*
   - this was motivated by making main_pkg_is_inside_std false for
     compiler_rt & friends.
 * rename "mini libc" to "universal libc"
2022-05-06 22:41:00 -07:00

262 lines
9.5 KiB
Zig

const std = @import("std");
const neg = @import("negXi2.zig");
const testing = std.testing;
const print = std.debug.print;
fn test__negsi2(a: i32, expected: i32) !void {
var result = neg.__negsi2(a);
try testing.expectEqual(expected, result);
}
test "negsi2" {
// TODO ensuring that math.minInt(i32); returns error
try test__negsi2(-3, 3);
try test__negsi2(-2, 2);
try test__negsi2(-1, 1);
try test__negsi2(0, 0); // special case for 2s complement
try test__negsi2(1, -1);
try test__negsi2(2, -2);
try test__negsi2(3, -3);
// max_usable == MAX(i32) == -MIN(i32) == 2147483647 == 7fffffff
// divTrunc: max_usable / i, i=1,2,3,5,100
// 7fffffff / i
try test__negsi2(-715827882, 715827882);
try test__negsi2(715827882, -715827882);
try test__negsi2(-429496729, 429496729);
try test__negsi2(429496729, -429496729);
try test__negsi2(-214748364, 214748364);
try test__negsi2(214748364, -214748364);
// shifting: max_usable >> i, i=0..bitsize-4
// 7fffffff >> i
// 7fffffff >> i + 1
// 7fffffff >> i + 3
// 7fffffff >> i + 7
try test__negsi2(-2147483647, 2147483647);
try test__negsi2(2147483647, -2147483647);
try test__negsi2(-2147483646, 2147483646);
try test__negsi2(2147483646, -2147483646);
try test__negsi2(-2147483644, 2147483644);
try test__negsi2(2147483644, -2147483644);
try test__negsi2(-2147483640, 2147483640);
try test__negsi2(2147483640, -2147483640);
try test__negsi2(-1073741823, 1073741823);
try test__negsi2(1073741823, -1073741823);
try test__negsi2(-1073741822, 1073741822);
try test__negsi2(1073741822, -1073741822);
try test__negsi2(-1073741820, 1073741820);
try test__negsi2(1073741820, -1073741820);
try test__negsi2(-1073741816, 1073741816);
try test__negsi2(1073741816, -1073741816);
try test__negsi2(-536870911, 536870911);
try test__negsi2(536870911, -536870911);
try test__negsi2(-536870910, 536870910);
try test__negsi2(536870910, -536870910);
try test__negsi2(-536870908, 536870908);
try test__negsi2(536870908, -536870908);
try test__negsi2(-536870904, 536870904);
try test__negsi2(536870904, -536870904);
try test__negsi2(-268435455, 268435455);
try test__negsi2(268435455, -268435455);
try test__negsi2(-268435454, 268435454);
try test__negsi2(268435454, -268435454);
try test__negsi2(-268435452, 268435452);
try test__negsi2(268435452, -268435452);
try test__negsi2(-268435448, 268435448);
try test__negsi2(268435448, -268435448);
try test__negsi2(-134217727, 134217727);
try test__negsi2(134217727, -134217727);
try test__negsi2(-134217726, 134217726);
try test__negsi2(134217726, -134217726);
try test__negsi2(-134217724, 134217724);
try test__negsi2(134217724, -134217724);
try test__negsi2(-134217720, 134217720);
try test__negsi2(134217720, -134217720);
try test__negsi2(-67108863, 67108863);
try test__negsi2(67108863, -67108863);
try test__negsi2(-67108862, 67108862);
try test__negsi2(67108862, -67108862);
try test__negsi2(-67108860, 67108860);
try test__negsi2(67108860, -67108860);
try test__negsi2(-67108856, 67108856);
try test__negsi2(67108856, -67108856);
try test__negsi2(-33554431, 33554431);
try test__negsi2(33554431, -33554431);
try test__negsi2(-33554430, 33554430);
try test__negsi2(33554430, -33554430);
try test__negsi2(-33554428, 33554428);
try test__negsi2(33554428, -33554428);
try test__negsi2(-33554424, 33554424);
try test__negsi2(33554424, -33554424);
try test__negsi2(-16777215, 16777215);
try test__negsi2(16777215, -16777215);
try test__negsi2(-16777214, 16777214);
try test__negsi2(16777214, -16777214);
try test__negsi2(-16777212, 16777212);
try test__negsi2(16777212, -16777212);
try test__negsi2(-16777208, 16777208);
try test__negsi2(16777208, -16777208);
try test__negsi2(-8388607, 8388607);
try test__negsi2(8388607, -8388607);
try test__negsi2(-8388606, 8388606);
try test__negsi2(8388606, -8388606);
try test__negsi2(-8388604, 8388604);
try test__negsi2(8388604, -8388604);
try test__negsi2(-8388600, 8388600);
try test__negsi2(8388600, -8388600);
try test__negsi2(-4194303, 4194303);
try test__negsi2(4194303, -4194303);
try test__negsi2(-4194302, 4194302);
try test__negsi2(4194302, -4194302);
try test__negsi2(-4194300, 4194300);
try test__negsi2(4194300, -4194300);
try test__negsi2(-4194296, 4194296);
try test__negsi2(4194296, -4194296);
try test__negsi2(-2097151, 2097151);
try test__negsi2(2097151, -2097151);
try test__negsi2(-2097150, 2097150);
try test__negsi2(2097150, -2097150);
try test__negsi2(-2097148, 2097148);
try test__negsi2(2097148, -2097148);
try test__negsi2(-2097144, 2097144);
try test__negsi2(2097144, -2097144);
try test__negsi2(-1048575, 1048575);
try test__negsi2(1048575, -1048575);
try test__negsi2(-1048574, 1048574);
try test__negsi2(1048574, -1048574);
try test__negsi2(-1048572, 1048572);
try test__negsi2(1048572, -1048572);
try test__negsi2(-1048568, 1048568);
try test__negsi2(1048568, -1048568);
try test__negsi2(-524287, 524287);
try test__negsi2(524287, -524287);
try test__negsi2(-524286, 524286);
try test__negsi2(524286, -524286);
try test__negsi2(-524284, 524284);
try test__negsi2(524284, -524284);
try test__negsi2(-524280, 524280);
try test__negsi2(524280, -524280);
try test__negsi2(-262143, 262143);
try test__negsi2(262143, -262143);
try test__negsi2(-262142, 262142);
try test__negsi2(262142, -262142);
try test__negsi2(-262140, 262140);
try test__negsi2(262140, -262140);
try test__negsi2(-262136, 262136);
try test__negsi2(262136, -262136);
try test__negsi2(-131071, 131071);
try test__negsi2(131071, -131071);
try test__negsi2(-131070, 131070);
try test__negsi2(131070, -131070);
try test__negsi2(-131068, 131068);
try test__negsi2(131068, -131068);
try test__negsi2(-131064, 131064);
try test__negsi2(131064, -131064);
try test__negsi2(-65535, 65535);
try test__negsi2(65535, -65535);
try test__negsi2(-65534, 65534);
try test__negsi2(65534, -65534);
try test__negsi2(-65532, 65532);
try test__negsi2(65532, -65532);
try test__negsi2(-65528, 65528);
try test__negsi2(65528, -65528);
try test__negsi2(-32767, 32767);
try test__negsi2(32767, -32767);
try test__negsi2(-32766, 32766);
try test__negsi2(32766, -32766);
try test__negsi2(-32764, 32764);
try test__negsi2(32764, -32764);
try test__negsi2(-32760, 32760);
try test__negsi2(32760, -32760);
try test__negsi2(-16383, 16383);
try test__negsi2(16383, -16383);
try test__negsi2(-16382, 16382);
try test__negsi2(16382, -16382);
try test__negsi2(-16380, 16380);
try test__negsi2(16380, -16380);
try test__negsi2(-16376, 16376);
try test__negsi2(16376, -16376);
try test__negsi2(-8191, 8191);
try test__negsi2(8191, -8191);
try test__negsi2(-8190, 8190);
try test__negsi2(8190, -8190);
try test__negsi2(-8188, 8188);
try test__negsi2(8188, -8188);
try test__negsi2(-8184, 8184);
try test__negsi2(8184, -8184);
try test__negsi2(-4095, 4095);
try test__negsi2(4095, -4095);
try test__negsi2(-4094, 4094);
try test__negsi2(4094, -4094);
try test__negsi2(-4092, 4092);
try test__negsi2(4092, -4092);
try test__negsi2(-4088, 4088);
try test__negsi2(4088, -4088);
try test__negsi2(-2047, 2047);
try test__negsi2(2047, -2047);
try test__negsi2(-2046, 2046);
try test__negsi2(2046, -2046);
try test__negsi2(-2044, 2044);
try test__negsi2(2044, -2044);
try test__negsi2(-2040, 2040);
try test__negsi2(2040, -2040);
try test__negsi2(-1023, 1023);
try test__negsi2(1023, -1023);
try test__negsi2(-1022, 1022);
try test__negsi2(1022, -1022);
try test__negsi2(-1020, 1020);
try test__negsi2(1020, -1020);
try test__negsi2(-1016, 1016);
try test__negsi2(1016, -1016);
try test__negsi2(-511, 511);
try test__negsi2(511, -511);
try test__negsi2(-510, 510);
try test__negsi2(510, -510);
try test__negsi2(-508, 508);
try test__negsi2(508, -508);
try test__negsi2(-504, 504);
try test__negsi2(504, -504);
try test__negsi2(-255, 255);
try test__negsi2(255, -255);
try test__negsi2(-254, 254);
try test__negsi2(254, -254);
try test__negsi2(-252, 252);
try test__negsi2(252, -252);
try test__negsi2(-248, 248);
try test__negsi2(248, -248);
try test__negsi2(-127, 127);
try test__negsi2(127, -127);
try test__negsi2(-126, 126);
try test__negsi2(126, -126);
try test__negsi2(-124, 124);
try test__negsi2(124, -124);
try test__negsi2(-120, 120);
try test__negsi2(120, -120);
try test__negsi2(-63, 63);
try test__negsi2(63, -63);
try test__negsi2(-62, 62);
try test__negsi2(62, -62);
try test__negsi2(-60, 60);
try test__negsi2(60, -60);
try test__negsi2(-56, 56);
try test__negsi2(56, -56);
try test__negsi2(-31, 31);
try test__negsi2(31, -31);
try test__negsi2(-30, 30);
try test__negsi2(30, -30);
try test__negsi2(-28, 28);
try test__negsi2(28, -28);
try test__negsi2(-24, 24);
try test__negsi2(24, -24);
try test__negsi2(-15, 15);
try test__negsi2(15, -15);
try test__negsi2(-14, 14);
try test__negsi2(14, -14);
try test__negsi2(-12, 12);
try test__negsi2(12, -12);
try test__negsi2(-8, 8);
try test__negsi2(8, -8);
}