Piotr Caban : msvcrt: Match native sinf results in -Pi/4 - Pi/4 range.

[Alexandre Julliard]

Module: wine
Branch: master
Commit: ee7b5ebc3a7843fc2997d5cc5f7784c4d51b4f8d
URL:    https://source.winehq.org/git/wine.git/?a=commit;h=ee7b5ebc3a7843fc2997d5cc5...

Author: Piotr Caban 
Date:   Mon Jun 21 16:37:36 2021 +0200

msvcrt: Match native sinf results in -Pi/4 - Pi/4 range.

Signed-off-by: Piotr Caban 
Signed-off-by: Alexandre Julliard

---

dlls/msvcrt/math.c | 11 +++++++----
 1 file changed, 7 insertions(+), 4 deletions(-)

diff --git a/dlls/msvcrt/math.c b/dlls/msvcrt/math.c
index bf1ed359da6..949bf12d66b 100644
--- a/dlls/msvcrt/math.c
+++ b/dlls/msvcrt/math.c
@@ -660,14 +660,17 @@ static float __expm1f(float x)
 /* Copied from musl: src/math/__sindf.c */
 static float __sindf(double x)
 {
-    static const double S1 = -0x15555554cbac77.0p-55,
-        S2 = 0x111110896efbb2.0p-59,
-        S3 = -0x1a00f9e2cae774.0p-65,
-        S4 = 0x16cd878c3b46a7.0p-71;
+    static const double S1 = -0x1.5555555555555p-3,
+        S2 = 0x1.1111111111111p-7,
+        S3 = -0x1.a01a01a01a01ap-13,
+        S4 = 0x1.71de3a556c734p-19;

double r, s, w, z;

z = x * x;
+    if (x > -7.8175831586122513e-03 && x < 7.8175831586122513e-03)
+        return x * (1 + S1 * z);
+
     w = z * z;
     r = S3 + z * S4;
     s = z * x;