X-Git-Url: http://nsz.repo.hu/git/?a=blobdiff_plain;f=src%2Fmath%2Facoshf.c;h=b773d48e2b84627e0d405a30d9ca8c2994aafe1c;hb=29e4319178cbc2a4e9f058a99ae8098d4b6ac055;hp=4596085e8fc4d9e345981b7b7454558f27de1ee8;hpb=482ccd2f7497a79ca83e998f54e823e7cedaaa6e;p=musl

diff --git a/src/math/acoshf.c b/src/math/acoshf.c
index 4596085e..b773d48e 100644
--- a/src/math/acoshf.c
+++ b/src/math/acoshf.c
@@ -1,17 +1,26 @@
 #include "libm.h"
 
+#if FLT_EVAL_METHOD==2
+#undef sqrtf
+#define sqrtf sqrtl
+#elif FLT_EVAL_METHOD==1
+#undef sqrtf
+#define sqrtf sqrt
+#endif
+
 /* acosh(x) = log(x + sqrt(x*x-1)) */
 float acoshf(float x)
 {
-	union {float f; int32_t i;} u = {.f = x};
+	union {float f; uint32_t i;} u = {x};
+	uint32_t a = u.i & 0x7fffffff;
 
-	if (u.i < 0x3f800000+(1<<23))
-		/* x < 2, invalid if x < 1 or nan */
+	if (a < 0x3f800000+(1<<23))
+		/* |x| < 2, invalid if x < 1 */
 		/* up to 2ulp error in [1,1.125] */
 		return log1pf(x-1 + sqrtf((x-1)*(x-1)+2*(x-1)));
 	if (u.i < 0x3f800000+(12<<23))
-		/* x < 0x1p12 */
+		/* 2 <= x < 0x1p12 */
 		return logf(2*x - 1/(x+sqrtf(x*x-1)));
-	/* x >= 0x1p12 */
+	/* x >= 0x1p12 or x <= -2 or nan */
 	return logf(x) + 0.693147180559945309417232121458176568f;
 }