add setFloatMode builtin and std.math.floor

 * skip installing std/rand_test.zig as it's not needed beyond running
   the std lib tests
 * add std.math.floor function
 * add setFloatMode builtin function to choose between
   builtin.FloatMode.Optimized (default) and builtin.FloatMode.Strict
   (Optimized is equivalent to -ffast-math in gcc)

1 files changed, 18 insertions, 0 deletions

diff --git a/test/compile_errors.zig b/test/compile_errors.zig
index a985949b6a..999e1eaa6d 100644
--- a/test/compile_errors.zig
+++ b/test/compile_errors.zig
@@ -1835,4 +1835,22 @@ pub fn addCases(cases: &tests.CompileErrorContext) {
         \\}
     ,
         ".tmp_source.zig:3:20: error: cast from 'u16' to 'u8' truncates bits");
+
+    cases.add("@setDebugSafety twice for same scope",
+        \\export fn foo() {
+        \\    @setDebugSafety(this, false);
+        \\    @setDebugSafety(this, false);
+        \\}
+    ,
+        ".tmp_source.zig:3:5: error: debug safety set twice for same scope",
+        ".tmp_source.zig:2:5: note: first set here");
+
+    cases.add("@setFloatMode twice for same scope",
+        \\export fn foo() {
+        \\    @setFloatMode(this, @import("builtin").FloatMode.Optimized);
+        \\    @setFloatMode(this, @import("builtin").FloatMode.Optimized);
+        \\}
+    ,
+        ".tmp_source.zig:3:5: error: float mode set twice for same scope",
+        ".tmp_source.zig:2:5: note: first set here");
 }