From 8f6064f5ce689226a528026f196a10c5ba7500d5 Mon Sep 17 00:00:00 2001 From: Denys Vlasenko Date: Sat, 30 Oct 2010 20:19:20 +0200 Subject: libm: fix testuite failure in modf This error is gone: Failure: Test: modf (NaN, &x) == NaN Result: is: -0.00000000000000000000e+00 -0 should be: nan nan Signed-off-by: Denys Vlasenko --- libm/s_modf.c | 15 ++++++--------- 1 file changed, 6 insertions(+), 9 deletions(-) (limited to 'libm/s_modf.c') diff --git a/libm/s_modf.c b/libm/s_modf.c index 26c2f1cd5..f73d5fddb 100644 --- a/libm/s_modf.c +++ b/libm/s_modf.c @@ -37,10 +37,8 @@ double modf(double x, double *iptr) } else { i = (0x000fffff)>>j0; if(((i0&i)|i1)==0) { /* x is integral */ - u_int32_t high; *iptr = x; - GET_HIGH_WORD(high,x); - INSERT_WORDS(x,high&0x80000000,0); /* return +-0 */ + INSERT_WORDS(x,i0&0x80000000,0); /* return +-0 */ return x; } else { INSERT_WORDS(*iptr,i0&(~i),0); @@ -48,18 +46,17 @@ double modf(double x, double *iptr) } } } else if (j0>51) { /* no fraction part */ - u_int32_t high; *iptr = x*one; - GET_HIGH_WORD(high,x); - INSERT_WORDS(x,high&0x80000000,0); /* return +-0 */ + /* We must handle NaNs separately. */ + if (j0 == 0x400 && ((i0 & 0xfffff) | i1)) + return x*one; + INSERT_WORDS(x,i0&0x80000000,0); /* return +-0 */ return x; } else { /* fraction part in low x */ i = ((u_int32_t)(0xffffffff))>>(j0-20); if((i1&i)==0) { /* x is integral */ - u_int32_t high; *iptr = x; - GET_HIGH_WORD(high,x); - INSERT_WORDS(x,high&0x80000000,0); /* return +-0 */ + INSERT_WORDS(x,i0&0x80000000,0); /* return +-0 */ return x; } else { INSERT_WORDS(*iptr,i0,i1&(~i)); -- cgit v1.2.3