msvcrt: Fix acosf implementation when returning Pi or Pi/2.

Wine-Bug: https://bugs.winehq.org/show_bug.cgi?id=49718Signed-off-by: Piotr Caban <piotr@codeweavers.com> Signed-off-by: Alexandre Julliard <julliard@winehq.org>

msvcrt: Fix acosf implementation when returning Pi or Pi/2.
cb7b23a3 · Piotr Caban · Alexandre Julliard · 3786462a · cb7b23a3
Commit cb7b23a3 authored Aug 18, 2020 by Piotr Caban Committed by Alexandre Julliard Aug 18, 2020
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math.c dlls/msvcrt/math.c +2 -2

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--- a/dlls/msvcrt/math.c
+++ b/dlls/msvcrt/math.c
@@ -259,7 +259,7 @@ float CDECL MSVCRT_acosf( float x )
    if (ix >= 0x3f800000) {
        if (ix == 0x3f800000) {
            if (hx >> 31)
-                return 2 * pio2_hi + 7.5231638453e-37;
+                return 2 * pio2_lo + 2 * pio2_hi + 7.5231638453e-37;
            return 0;
        }
        if (MSVCRT__isnanf(x)) return x;
@@ -268,7 +268,7 @@ float CDECL MSVCRT_acosf( float x )
    /* |x| < 0.5 */
    if (ix < 0x3f000000) {
        if (ix <= 0x32800000) /* |x| < 2**-26 */
-            return pio2_hi + 7.5231638453e-37;
+            return pio2_lo + pio2_hi + 7.5231638453e-37;
        return pio2_hi - (x - (pio2_lo - x * acosf_R(x * x)));
    }
    /* x < -0.5 */