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authorS. Gilles <sgilles@math.umd.edu>2018-07-31 21:54:30 -0400
committerS. Gilles <sgilles@math.umd.edu>2018-07-31 21:54:30 -0400
commit95d1f61428c4ba5176b341da851b2edee196cb09 (patch)
tree3e39ada49b8de3b3b1807ad870b3b64a327c04e0
parenta00a5db9878af9a52fe84cb1c0a7e9316924c7fa (diff)
downloadmc-95d1f61428c4ba5176b341da851b2edee196cb09.tar.gz
Include test cases for all (relevant) sub-polynomials of atan.
-rw-r--r--lib/math/test/atan-impl.myr466
1 files changed, 459 insertions, 7 deletions
diff --git a/lib/math/test/atan-impl.myr b/lib/math/test/atan-impl.myr
index 1c78639..fa992c8 100644
--- a/lib/math/test/atan-impl.myr
+++ b/lib/math/test/atan-impl.myr
@@ -9,9 +9,10 @@ const main = {
[.name="atan-02", .fn = atan02], /* atan, flt64 */
[.name="atan-03", .fn = atan03], /* atan2, flt32 */
[.name="atan-04", .fn = atan04], /* atan2, flt64 */
- [.name="atan-05", .fn = atan05], /* off-by-1-ulp quarantine */
- [.name="atan-06", .fn = atan06], /* exhaustively test C */
- [.name="atan-07", .fn = atan07], /* NaN handling */
+ [.name="atan-05", .fn = atan05], /* atan, off-by-1-ulp quarantine */
+ [.name="atan-06", .fn = atan06], /* atan2, off-by-1-ulp quarantine */
+ [.name="atan-07", .fn = atan07], /* exhaustively test C */
+ [.name="atan-08", .fn = atan08], /* NaN handling */
][:])
}
@@ -71,7 +72,68 @@ const atan01 = {c
}
const atan02 = {c
- testr.fail(c, "WRITE THIS")
+ var inputs : (uint64, uint64)[:] = [
+ (0x10ba5f16340a0bc9, 0x10ba5f16340a0bc9),
+ (0xd98ac92afca0e53d, 0xbff921fb54442d18),
+ (0xec7a77dca00c3b26, 0xbff921fb54442d18),
+ (0xee57f77337f8e709, 0xbff921fb54442d18),
+ (0x9e25782df360cddd, 0x9e25782df360cddd),
+ (0x9243219f73e1f319, 0x9243219f73e1f319),
+ (0xa4d1ffde70716ab8, 0xa4d1ffde70716ab8),
+ (0x48bcc07018965976, 0x3ff921fb54442d18),
+ (0x1f864ca16540f910, 0x1f864ca16540f910),
+ (0x15cb61e0de4d0245, 0x15cb61e0de4d0245),
+ (0xd9bd7e5a3d6bc814, 0xbff921fb54442d18),
+ (0x75cd7563af1d13f2, 0x3ff921fb54442d18),
+ (0xed91a27ee1cf7fd4, 0xbff921fb54442d18),
+ (0xc41d55b172ee68ee, 0xbff921fb54442d18),
+ (0x558fe35fd3a69e4b, 0x3ff921fb54442d18),
+ (0xa3cfec3df7c1c356, 0xa3cfec3df7c1c356),
+ (0x38de5d01bc664ea9, 0x38de5d01bc664ea9),
+ (0x190e8e5960b38edb, 0x190e8e5960b38edb),
+ (0x03bd0fd0a2cdf14e, 0x03bd0fd0a2cdf14e),
+ (0xb24e849d7122766b, 0xb24e849d7122766b),
+ (0xda4ee410df592fdd, 0xbff921fb54442d18),
+ (0xc76fb300ce286b3f, 0xbff921fb54442d18),
+ (0x9f3dc5e92e95d81b, 0x9f3dc5e92e95d81b),
+ (0x22ebeafb26c4e1cd, 0x22ebeafb26c4e1cd),
+ (0x85af77b27a6c9ebd, 0x85af77b27a6c9ebd),
+ (0x060bdb1f2d9809c8, 0x060bdb1f2d9809c8),
+ (0xeaefd066fb169d3e, 0xbff921fb54442d18),
+ (0x55036c3913a92f51, 0x3ff921fb54442d18),
+ (0x5049f3035f2e17b9, 0x3ff921fb54442d18),
+ (0xa6032d5682f84540, 0xa6032d5682f84540),
+ (0xf33fb18d1d5b162a, 0xbff921fb54442d18),
+ (0x9c88441ff7f72238, 0x9c88441ff7f72238),
+ (0xbbd17263c0f5c1dc, 0xbbd17263c0f5c1dc),
+ (0x4d82ee8ecba53872, 0x3ff921fb54442d18),
+ (0x32f4e9594348833e, 0x32f4e9594348833e),
+ (0xdc5ca2769af7825f, 0xbff921fb54442d18),
+ (0xcfcc1defc79fc30b, 0xbff921fb54442d18),
+ (0xcf7ce4fad9366c04, 0xbff921fb54442d18),
+ (0x2919d12d8e3ce4ea, 0x2919d12d8e3ce4ea),
+ (0x43914f32a6c79113, 0x3ff921fb54442d18),
+ (0x3dc0726cc985fcb4, 0x3dc0726cc985fcb4),
+ (0x39279f3510ab6c1c, 0x39279f3510ab6c1c),
+ (0x888f53f3ef5a64eb, 0x888f53f3ef5a64eb),
+ (0xf6698a51e74bc635, 0xbff921fb54442d18),
+ ][:]
+
+ for (x, y) : inputs
+ var xf : flt64 = std.flt64frombits(x)
+ var yf : flt64 = std.flt64frombits(y)
+ var a1f : flt64 = math.atan(xf)
+ var a2f : flt64 = math.atan2(xf, 1.0)
+ var a1u : uint64 = std.flt64bits(a1f)
+ var a2u : uint64 = std.flt64bits(a2f)
+ testr.check(c, same64(a1u, a2u),
+ "atan(0x{b=16,w=16,p=0}) = 0x{b=16,w=16,p=0}, but atan2(0x{b=16,w=16,p=0}, 1.0) = 0x{b=16,w=16,p=0}",
+ x, a1u, x, a2u)
+
+ testr.check(c, same64(a1u, y),
+ "atan(0x{b=16,w=16,p=0}) = 0x{b=16,w=16,p=0}, should be 0x{b=16,w=16,p=0}",
+ x, a1u, y)
+ ;;
}
const atan03 = {c
@@ -148,18 +210,408 @@ const atan03 = {c
}
const atan04 = {c
- testr.fail(c, "WRITE THIS")
+ var inputs : (uint64, uint64, uint64)[:] = [
+ (0x0000000000000000, 0x8000000000000000, 0x400921fb54442d18), /* atan2(+0, -0) = +Pi */
+ (0x8000000000000000, 0x8000000000000000, 0xc00921fb54442d18), /* atan2(-0, -0) = -Pi */
+ (0x0000000000000000, 0x0000000000000000, 0x0000000000000000), /* atan2(+0, +0) = +0 */
+ (0x8000000000000000, 0x0000000000000000, 0x8000000000000000), /* atan2(-0, +0) = -0 */
+ (0x0000000000000000, 0xc678962c36789c22, 0x400921fb54442d18), /* atan2(+0, x < 0) = +Pi */
+ (0x0000000000000000, 0x8000000200000000, 0x400921fb54442d18),
+ (0x0000000000000000, 0xdddddddddddddddd, 0x400921fb54442d18),
+ (0x8000000000000000, 0xc678962c36789c22, 0xc00921fb54442d18), /* atan2(-0, x < 0) = -Pi */
+ (0x8000000000000000, 0x8000000200000000, 0xc00921fb54442d18),
+ (0x8000000000000000, 0xdddddddddddddddd, 0xc00921fb54442d18),
+ (0x0000000000000000, 0x36789ac6987e678a, 0x0000000000000000), /* atan2(+0, x > 0) = +0 */
+ (0x0000000000000000, 0x0000000000000002, 0x0000000000000000),
+ (0x0000000000000000, 0x4ddddddd00000000, 0x0000000000000000),
+ (0x8000000000000000, 0x36789ac6987e678a, 0x8000000000000000), /* atan2(-0, x > 0) = -0 */
+ (0x8000000000000000, 0x0000000000000002, 0x8000000000000000),
+ (0x8000000000000000, 0x4ddddddddddddddd, 0x8000000000000000),
+ (0xdddddddddddddddd, 0x0000000000000000, 0xbff921fb54442d18), /* atan2(y < 0, 0) = -Pi/2 */
+ (0xc678962c36789c22, 0x0000000000000000, 0xbff921fb54442d18),
+ (0x8000000000000002, 0x0000000000000000, 0xbff921fb54442d18),
+ (0x4ddddddddddddddd, 0x0000000000000000, 0x3ff921fb54442d18), /* atan2(y > 0, 0) = +Pi/2 */
+ (0x36789ac6987e678a, 0x0000000000000000, 0x3ff921fb54442d18),
+ (0x0000000000000002, 0x0000000000000000, 0x3ff921fb54442d18),
+ (0x7ff0000000000000, 0xfff0000000000000, 0x4002d97c7f3321d2), /* atan2(+Inf, -Inf) = +3*Pi/4 */
+ (0xfff0000000000000, 0xfff0000000000000, 0xc002d97c7f3321d2), /* atan2(-Inf, -Inf) = -3*Pi/4 */
+ (0x7ff0000000000000, 0x7ff0000000000000, 0x3fe921fb54442d18), /* atan2(+Inf, +Inf) = +Pi/4 */
+ (0xfff0000000000000, 0x7ff0000000000000, 0xbfe921fb54442d18), /* atan2(-Inf, +Inf) = -Pi/4 */
+ (0x7ff0000000000000, 0x4ddddddddddddddd, 0x3ff921fb54442d18), /* atan2(+Inf, finite) = +Pi/2 */
+ (0x7ff0000000000000, 0x0000000000000001, 0x3ff921fb54442d18),
+ (0x7ff0000000000000, 0x8000000000000004, 0x3ff921fb54442d18),
+ (0x7ff0000000000000, 0xf6789ac6987e678a, 0x3ff921fb54442d18),
+ (0xfff0000000000000, 0x4ddddddddddddddd, 0xbff921fb54442d18), /* atan2(-Inf, finite) = -Pi/2 */
+ (0xfff0000000000000, 0x0000000000000001, 0xbff921fb54442d18),
+ (0xfff0000000000000, 0x8000000000000004, 0xbff921fb54442d18),
+ (0xfff0000000000000, 0xf6789ac6987e678a, 0xbff921fb54442d18),
+ (0x6a53a787aa520b4c, 0xfff0000000000000, 0x400921fb54442d18), /* atan2(finite > 0, -Inf) = +Pi */
+ (0x3553a787aaa33ab8, 0xfff0000000000000, 0x400921fb54442d18),
+ (0x5553a787aaa33ab8, 0xfff0000000000000, 0x400921fb54442d18),
+ (0xea53a787aa520b4c, 0xfff0000000000000, 0xc00921fb54442d18), /* atan2(finite < 0, -Inf) = -Pi */
+ (0x9553a787aaa33ab8, 0xfff0000000000000, 0xc00921fb54442d18),
+ (0xc553a787aaa33ab8, 0xfff0000000000000, 0xc00921fb54442d18),
+ (0x6a53a787aa520b4c, 0x7ff0000000000000, 0x0000000000000000), /* atan2(finite > 0, +Inf) = +0 */
+ (0x3553a787aaa33ab8, 0x7ff0000000000000, 0x0000000000000000),
+ (0x5553a787aaa33ab8, 0x7ff0000000000000, 0x0000000000000000),
+ (0xea53a787aa520b4c, 0x7ff0000000000000, 0x8000000000000000), /* atan2(finite < 0, +Inf) = -0 */
+ (0x9553a787aaa33ab8, 0x7ff0000000000000, 0x8000000000000000),
+ (0xc553a787aaa33ab8, 0x7ff0000000000000, 0x8000000000000000),
+ (0xc3a19e952471b77e, 0x3787d6fbb86b73be, 0xbff921fb54442d18), /* misc */
+ (0x27aa78e1d1f0495c, 0xddd13f5bd464f1a5, 0x400921fb54442d18),
+ (0xb8402fae1dfc652c, 0xba6fcc2cc1ed7e10, 0xc00921fb54432877),
+ (0x66dce7f72e6044ad, 0x275302c43652a638, 0x3ff921fb54442d18),
+ (0x4e4b96b837a90109, 0x0f6e0a35d7a1c7ae, 0x3ff921fb54442d18),
+ (0x39e3f59d2cdaf453, 0xc1c9eec772632c8b, 0x400921fb54442d18),
+ (0x0e80d207f7fc1dee, 0xdc3ccf9de59c1620, 0x400921fb54442d18),
+ (0xc53a12760a738704, 0x013d7cd6b38fd663, 0xbff921fb54442d18),
+ (0x24c9826368e2bab6, 0x673ee065b77f3411, 0x000000000000069c),
+ (0x8648f8f528372eef, 0x70bdc29525e17f3d, 0x8000000000000000),
+ (0x949d1ddd9d2c70d9, 0xed7a82c886f9b2b5, 0xc00921fb54442d18),
+ (0x953f916c39b9967c, 0x0e43ed486cdf330c, 0xbff921fb54442d18),
+ (0x9e3633326b5d0ef3, 0xf5c8913f8e308a65, 0xc00921fb54442d18),
+ (0xaf1c2b5cfb3e9c97, 0xae2582384f4c4364, 0xbff92213c33fcf98),
+ (0x13a48905d9e021e7, 0x764d46c054f3e5f8, 000000000000000000),
+ (0x1c8142b5bce1d2a8, 0xe7f6c7dc0f16862c, 0x400921fb54442d18),
+ (0xfb0f7a74951ff0d7, 0x0bb323507b3cbacf, 0xbff921fb54442d18),
+ (0x4eac767a5766fcd1, 0xf8b2a6b240350c57, 0x400921fb54442d18),
+ (0x2fb71a162e3ea604, 0x60d683328bfc7d57, 0x0ed06b3d4cc87ec9),
+ (0xc5e748de4fffadde, 0x10ba5f16340a0bc9, 0xbff921fb54442d18),
+ (0xd98ac92afca0e53d, 0xec7a77dca00c3b26, 0xc00921fb54442d18),
+ (0x9243219f73e1f319, 0xa4d1ffde70716ab8, 0xc00921fb54442d18),
+ (0x48bcc07018965976, 0x1f864ca16540f910, 0x3ff921fb54442d18),
+ (0x15cb61e0de4d0245, 0xd9bd7e5a3d6bc814, 0x400921fb54442d18),
+ (0xc41d55b172ee68ee, 0x558fe35fd3a69e4b, 0xae7d7006d1d45ebc),
+ (0xa3cfec3df7c1c356, 0x38de5d01bc664ea9, 0xaae0d260b47f817c),
+ (0xbee29ab450ee989f, 0x190e8e5960b38edb, 0xbff921fb54442d18),
+ (0x03bd0fd0a2cdf14e, 0xb24e849d7122766b, 0x400921fb54442d18),
+ (0x9f3dc5e92e95d81b, 0x22ebeafb26c4e1cd, 0xbc41102fc5241049),
+ (0x85af77b27a6c9ebd, 0x060bdb1f2d9809c8, 0xbf921294a138c466),
+ (0xeaefd066fb169d3e, 0x55036c3913a92f51, 0xbff921fb54442d18),
+ (0xbbd17263c0f5c1dc, 0x4d82ee8ecba53872, 0xae3d7d699b3da6ce),
+ (0xbef4c6bbd5b013f7, 0x32f4e9594348833e, 0xbff921fb54442d18),
+ (0xcf7ce4fad9366c04, 0x2919d12d8e3ce4ea, 0xbff921fb54442d18),
+ (0x3ff0de4d0245d9bd, 0x3ff07e5a3d6bc814, 0x3fe97e0262debf5b),
+ (0x3ff0060bdb1f2d98, 0x3ff009c8eaefd066, 0x3fe91e401d092a68),
+ (0x3ff04348833edc5c, 0x3ff0a2769af7825f, 0x3fe8c566f4d252eb),
+ (0x3ff0d9366c042919, 0x3ff0d12d8e3ce4ea, 0x3fe9299e6eb7eb7f),
+ ][:]
+
+ for (y, x, z_exp) : inputs
+ var xf : flt64 = std.flt64frombits(x)
+ var yf : flt64 = std.flt64frombits(y)
+ var zf_act : flt64 = math.atan2(yf, xf)
+ var z_act : uint64 = std.flt64bits(zf_act)
+
+ testr.check(c, same64(z_act, z_exp),
+ "atan(0x{b=16,w=16,p=0}, 0x{b=16,w=16,p=0}) = 0x{b=16,w=16,p=0}, should be 0x{b=16,w=16,p=0}",
+ y, x, z_act, z_exp)
+ ;;
}
const atan05 = {c
- testr.fail(c, "WRITE THIS")
+ var inputs : (uint64, uint64, uint64)[:] = [
+ (0xbee29ab450ee989f, 0xbee29ab450ec8003, 0xbee29ab450ec8002),
+ (0xbef4c6bbd5b013f7, 0xbef4c6bbd5a46691, 0xbef4c6bbd5a46692),
+ ][:]
+
+ for (x, y_perfect, y_acceptable) : inputs
+ var xf : flt64 = std.flt64frombits(x)
+ var yf : flt64 = math.atan(xf)
+ var yu : uint64 = std.flt64bits(yf)
+
+ if !same64(yu, y_perfect) && !same64(yu, y_acceptable)
+ testr.fail(c,
+ "atan(0x{b=16,w=16,p=0}) should be 0x{b=16,w=16,p=0}, wil also accept 0x{b=16,w=16,p=0}, was 0x{b=16,w=16,p=0}",
+ x, y_perfect, y_acceptable, yu)
+ ;;
+ ;;
}
const atan06 = {c
- testr.fail(c, "WRITE THIS")
+ var inputs : (uint64, uint64, uint64, uint64)[:] = [
+ (0x7ee54b8760669171, 0xb2be78b5d28bd697, 0x3ff921fb54442d18, 0x3ff921fb54442d19),
+ (0x6ac1e65e358fa249, 0xbd59edfa1607e504, 0x3ff921fb54442d18, 0x3ff921fb54442d19),
+ (0xd525a7f2ced4927f, 0x95ede4db7783fcc9, 0xbff921fb54442d18, 0xbff921fb54442d19),
+ (0xccd3a5e34176f426, 0xa8a777c89a5ef6f2, 0xbff921fb54442d18, 0xbff921fb54442d19),
+ (0x3ff075cd7563af1d, 0x3ff013f2ed91a27e, 0x3fe9823675699a92, 0x3fe9823675699a93),
+ (0x3ff0f7c1c35638de, 0x3ff05d01bc664ea9, 0x3fe9b68915c8bb31, 0x3fe9b68915c8bb32),
+ (0x3ff0bef4c6bbd5b0, 0x3ff013f732f4e959, 0x3fe9c8a841c1c952, 0x3fe9c8a841c1c953),
+ (0x3ff0888f53f3ef5a, 0x3ff064ebf6698a51, 0x3fe9449d9c8c9bc0, 0x3fe9449d9c8c9bc1),
+ ][:]
+
+ for (y, x, z_perfect, z_acceptable) : inputs
+ var yf : flt64 = std.flt64frombits(y)
+ var xf : flt64 = std.flt64frombits(x)
+ var zf : flt64 = math.atan2(yf, xf)
+ var zu : uint64 = std.flt64bits(zf)
+
+ if !same64(zu, z_perfect) && !same64(zu, z_acceptable)
+ testr.fail(c,
+ "atan2(0x{b=16,w=16,p=0}, 0x{b=16,w=16,p=0}) should be 0x{b=16,w=16,p=0}, wil also accept 0x{b=16,w=16,p=0}, was 0x{b=16,w=16,p=0}",
+ y, x, z_perfect, z_acceptable, zu)
+ ;;
+ ;;
}
const atan07 = {c
+ var inputs : (uint64, uint64, uint64)[:] = [
+ (0x18426dc1da370147, 0x988212e3418dac39, 0x40089fa4e7718127), /* start at j = 16 */
+ (0x75f53f43ddf1bea3, 0xf5b664a94607233a, 0x3ffa2f66b9da6113),
+ (0xa70f3b26830c1a94, 0xa74c60b2a9f15203, 0xc0089555472fa904),
+ (0x3937099c00388aaa, 0x38faf7f608176196, 0x3ff7f6d4e7911d74),
+ (0xea2807836bcaf607, 0x69edc29120f8d3db, 0xbff7e58f64ee105c),
+ (0x8b4d90a9fe6bae02, 0x0b869a0bac14cf06, 0xbfb4e20b353d1cd2),
+ (0xb4b65db1cbab83cf, 0xb4efd7158af2665a, 0xc0086e9d9bb6e77d),
+ (0x4716d543d404ae35, 0xc7502d88541a937a, 0x40086dcab757f45c),
+ (0xd821ab3bf346da52, 0xd857a58e9faf7b83, 0xc00863404ebd1155),
+ (0x222a54c254087afe, 0xa260db8f64f01324, 0x40085aae7d9e5ede),
+ (0xbf77a88b96eed0c5, 0x3fad49845988038f, 0xbfb9c332e78b9982),
+ (0x4230048eaf9862bc, 0x41fb16739ee88b27, 0x3ff772a95cc1b5d0),
+ (0x1100f13181258d69, 0x10cd58b7c1ae82ff, 0x3ff76844d0627ee0),
+ (0x7b5c5a93ccb53cd6, 0xfb2a02a3c95263b7, 0x3ffaf59f0e4eb2a5),
+ (0xb247b96c86d56ece, 0x3279bb34f20c78d6, 0xbfbd5fded650f614),
+ (0x115f263dc39ac9a5, 0x112df4339ae6bb12, 0x3ff737fb844962b8),
+ (0x0868e008bbd86562, 0x0838b0561328de61, 0x3ff728666e0adb09),
+ (0xd4bb121d74efe2da, 0xd4ea966130621e4c, 0xc0081eb8c1a4153a),
+ (0x88e5d8329155d426, 0x88b7242e0fc48972, 0xbffb3d3d48336602),
+ (0x0d0ea0219a2c652d, 0x0d3c060e7f8db79d, 0x3fc160c1988f88aa),
+ (0xc643f7c8910fb2aa, 0x46163c97e80a13ef, 0xbff6eb72b043c981),
+ (0xf6e835bc9adeaf59, 0x76bc0ffdf6576c1d, 0xbff6d49ba0ac648b),
+ (0x8c6daee970ffa651, 0x0c9945452e078530, 0xbfc2a918953f600a),
+ (0xda75a3bf208dd25a, 0xdaa1ce8481388f38, 0xc007ed3cd8698716),
+ (0x256084badab69b6f, 0xa58a3e76a1a9ac0f, 0x4007e25710289717),
+ (0x192bbb1d943d1c72, 0x99558053a5ca0554, 0x4007daa06a0fe77a),
+ (0x5ac36b61305c29f0, 0x5a9937845b781436, 0x3ff68ee124470819),
+ (0x5c68b6c9ddb3ba95, 0xdc92798f09125a3b, 0x4007ceaaaa488a83),
+ (0x6391aa182e1d70d9, 0xe3b9d8cda07245bf, 0x4007c76a07bf2989),
+ (0xbc68b545ae310bd6, 0x3c41338754f714d5, 0xbff66029d8a55e48),
+ (0x7d5059dea1719a3a, 0x7d2786542fd88ffd, 0x3ff64924d073ac1c),
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+ (0x0984c57a7e9d51da, 0x8985e00a293f6a14, 0x40030e7acd40c442),
+ (0xf0cb5b77a2c2f56a, 0xf0ccafe7a265b2f1, 0xc0030a129477250a),
+ (0x02740ba4fb4cdb85, 0x8274ef33fe8f8762, 0x400305e720d195af),
+ (0x9357aa6b6e40e4ce, 0x1356ba9fc9b8c04a, 0xbfe9c75ab7859d93),
+ (0xc39eaa3101026fc5, 0x439fcb8dfd282364, 0xbfe88dbfbb9e3a03),
+ (0xc06ef5bac1f0755a, 0xc06ff8851d5dfcf5, 0xc002fa61c91e15e9),
+ (0x03a8d2f6619e1128, 0x03a988403eb55bcd, 0x3fe8aec91f700e10),
+ (0x93cb2e10bb006567, 0x13cbcd7e9dcf755a, 0xbfe8c53297e66569),
+ (0x90ce665b5f887a3c, 0x10cdcdabe52970fd, 0xbfe97322edfec555),
+ (0x9252ad57a250df33, 0x1252fc2a219dff1c, 0xbfe8df02dad91818),
+ (0xa4f9e11b6cb66d86, 0xa4f9947d89a8a498, 0xc002cd934ed639b9),
+ (0x4eb98661a247fdce, 0xceb9babf2dbaa10b, 0x4002e1a8e0f0f5b7),
+ (0x13758224e135e1c5, 0x937596e7d8816f9c, 0x4002dd5714deeb1e),
+ (0x26ecf80bd6fb389b, 0xa6ecf11130353926, 0x4002d885ae886a69), /* j = 256 */
+ ][:]
+
+ for (y, x, z_exp) : inputs
+ var xf : flt64 = std.flt64frombits(x)
+ var yf : flt64 = std.flt64frombits(y)
+ var zf_act : flt64 = math.atan2(yf, xf)
+ var z_act : uint64 = std.flt64bits(zf_act)
+
+ testr.check(c, same64(z_act, z_exp),
+ "atan(0x{b=16,w=16,p=0}, 0x{b=16,w=16,p=0}) = 0x{b=16,w=16,p=0}, should be 0x{b=16,w=16,p=0}",
+ y, x, z_act, z_exp)
+ ;;
+}
+
+const atan08 = {c
testr.check(c, std.isnan(math.atan(std.flt64nan())), "atan(NaN64) should be NaN")
testr.check(c, std.isnan(math.atan(std.flt32nan())), "atan(NaN32) should be NaN")