From d28b445329fbee865a10568e997241079d4d71e4 Mon Sep 17 00:00:00 2001
From: Marc Tiehuis <marc@tiehu.is>
Date: Mon, 6 Dec 2021 00:49:03 +1300
Subject: [PATCH] std/math: fix __rem_pio2 underflow

Error in translated code. Found by fuzzing.
---
 lib/std/math/__rem_pio2.zig | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/lib/std/math/__rem_pio2.zig b/lib/std/math/__rem_pio2.zig
index 63976d4d07..c8cb8fb644 100644
--- a/lib/std/math/__rem_pio2.zig
+++ b/lib/std/math/__rem_pio2.zig
@@ -186,7 +186,7 @@ pub fn __rem_pio2(x: f64, y: *[2]f64) i32 {
     while (tx[U(i)] == 0.0) {
         i -= 1;
     }
-    n = __rem_pio2_large(tx[0..], ty[0..], @intCast(i32, (ix >> 20) - (0x3ff + 23)), i + 1, 1);
+    n = __rem_pio2_large(tx[0..], ty[0..], @intCast(i32, (ix >> 20)) - (0x3ff + 23), i + 1, 1);
     if (sign) {
         y[0] = -ty[0];
         y[1] = -ty[1];