File 2953-Fix-generator-state-mask-bug.patch of Package erlang

Overview Repositories Revisions Requests Users Attributes Meta

File 2953-Fix-generator-state-mask-bug.patch of Package erlang (Revision 9deafeb64e59c8b1cbd25b12c803e3c0)

Currently displaying revision 9deafeb64e59c8b1cbd25b12c803e3c0 , Show latest

From 1b03fcb9599c29bb22340e2bb729746af853bb7d Mon Sep 17 00:00:00 2001
From: Raimo Niskanen <raimo@erlang.org>
Date: Mon, 2 May 2022 17:11:44 +0200
Subject: [PATCH 3/6] Fix generator state mask bug

---
 lib/stdlib/src/rand.erl        | 2 +-
 lib/stdlib/test/rand_SUITE.erl | 8 ++++----
 2 files changed, 5 insertions(+), 5 deletions(-)

diff --git a/lib/stdlib/src/rand.erl b/lib/stdlib/src/rand.erl
index 217b1d14b5..5f94804bfb 100644
--- a/lib/stdlib/src/rand.erl
+++ b/lib/stdlib/src/rand.erl
@@ -1511,7 +1511,7 @@ dummy_seed({A1, A2, A3}) ->
 
 -spec mwc59(CX0 :: mwc59_state()) -> CX1 :: mwc59_state().
 mwc59(CX0) -> % when is_integer(CX0), 1 =< CX0, CX0 < ?MWC59_P ->
-    CX = ?MASK(58, CX0),
+    CX = ?MASK(59, CX0),
     C = CX bsr ?MWC59_B,
     X = ?MASK(?MWC59_B, CX),
     ?MWC59_A * X + C.
diff --git a/lib/stdlib/test/rand_SUITE.erl b/lib/stdlib/test/rand_SUITE.erl
index 54363b2761..90ea2890e8 100644
--- a/lib/stdlib/test/rand_SUITE.erl
+++ b/lib/stdlib/test/rand_SUITE.erl
@@ -214,13 +214,13 @@ mwc59_api(Config) when is_list(Config) ->
     mwc59_api(1, 1000000).
 
 mwc59_api(CX0, 0) ->
-    CX = 187860517065527182,
+    CX = 298134347579367847,
     {CX, CX} = {CX0, CX},
     V0 = rand:mwc59_value(CX0),
-    V = 230807595801982862,
+    V = 44296811804442023,
     {V, V} = {V0, V},
     W0 = rand:mwc59_full_value(CX0),
-    W = 202476383090409870,
+    W = 43477957222139559,
     {W, W} = {W0, W},
     F0 = rand:mwc59_float(CX0),
     F = (W band ((1 bsl 53) - 1)) * (1 / (1 bsl 53)),
@@ -1165,7 +1165,7 @@ do_measure(Iterations) ->
                             end
                   end
           end,
-          {exsp,next}, Iterations,
+          {exsp,mod}, Iterations,
           TMarkUniformRange10000, OverheadUniformRange1000),
     _ =
         measure_1(
-- 
2.35.3

Places

File 2953-Fix-generator-state-mask-bug.patch of Package erlang (Revision 9deafeb64e59c8b1cbd25b12c803e3c0)

Places