(CFLAGS-tst-align.c): Add -mpreferred-stack-boundary=4.

[thirdparty/glibc.git] / sysdeps / ieee754 / flt-32 / s_nextafterf.c

diff --git a/sysdeps/ieee754/flt-32/s_nextafterf.c b/sysdeps/ieee754/flt-32/s_nextafterf.c
index 600c14621fac5495d7a4d4d65c4bf75348c9184f..e1568e24c93c24de8911f7a23a117096d2198b51 100644 (file)
--- a/sysdeps/ieee754/flt-32/s_nextafterf.c
+++ b/sysdeps/ieee754/flt-32/s_nextafterf.c
@@ -18,7 +18,7 @@ static char rcsid[] = "$NetBSD: s_nextafterf.c,v 1.4 1995/05/10 20:48:01 jtc Exp
 #endif
 
 #include "math.h"
-#include <math_private.h>
+#include "math_private.h"
 #include <float.h>
 
 #ifdef __STDC__
@@ -40,12 +40,9 @@ static char rcsid[] = "$NetBSD: s_nextafterf.c,v 1.4 1995/05/10 20:48:01 jtc Exp
           return x+y;
        if(x==y) return y;              /* x=y, return y */
        if(ix==0) {                             /* x == 0 */
-           float u;
            SET_FLOAT_WORD(x,(hy&0x80000000)|1);/* return +-minsubnormal */
-           u = math_opt_barrier (x);
-           u = u*u;
-           math_force_eval (u);                /* raise underflow flag */
-           return x;
+           y = x*x;
+           if(y==x) return y; else return x;   /* raise underflow flag */
        }
        if(hx>=0) {                             /* x > 0 */
            if(hx>hy) {                         /* x > y, x -= ulp */
@@ -64,12 +61,15 @@ static char rcsid[] = "$NetBSD: s_nextafterf.c,v 1.4 1995/05/10 20:48:01 jtc Exp
        if(hy>=0x7f800000) {
          x = x+x;      /* overflow  */
          if (FLT_EVAL_METHOD != 0)
-           asm ("" : "+m"(x));
+           asm ("" : "=m"(x) : "m"(x));
          return x;     /* overflow  */
        }
-       if(hy<0x00800000) {
-           float u = x*x;                      /* underflow */
-           math_force_eval (u);                /* raise underflow flag */
+       if(hy<0x00800000) {             /* underflow */
+           y = x*x;
+           if(y!=x) {          /* raise underflow flag */
+               SET_FLOAT_WORD(y,hx);
+               return y;
+           }
        }
        SET_FLOAT_WORD(x,hx);
        return x;