math: fix remquo.c when x==-y and a subnormal remainder bug as well

[musl] / src / math / remquof.c

diff --git a/src/math/remquof.c b/src/math/remquof.c
index 11569ce..536a050 100644 (file)
--- a/src/math/remquof.c
+++ b/src/math/remquof.c
@@ -41,7 +41,7 @@ float remquof(float x, float y, int *quo)
                q = 0;
                goto fixup;
        } else if(hx==hy) {  /* |x| = |y| return x*0*/
-               *quo = 1;
+               *quo = sxy ? -1 : 1;
                return Zero[(uint32_t)sx>>31];
        }
 
@@ -92,6 +92,7 @@ float remquof(float x, float y, int *quo)
 
        /* convert back to floating value and restore the sign */
        if (hx == 0) {                             /* return sign(x)*0 */
+               q &= 0x7fffffff;
                *quo = sxy ? -q : q;
                return Zero[(uint32_t)sx>>31];
        }