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-rw-r--r--sysdeps/ieee754/ldbl-128ibm/mpn2ldbl.c75
-rw-r--r--sysdeps/ieee754/ldbl-128ibm/printf_fphex.c35
-rw-r--r--sysdeps/ieee754/ldbl-128ibm/s_fpclassifyl.c37
-rw-r--r--sysdeps/ieee754/ldbl-128ibm/s_nextafterl.c107
-rw-r--r--sysdeps/ieee754/ldbl-128ibm/s_nexttoward.c23
-rw-r--r--sysdeps/ieee754/ldbl-128ibm/s_nexttowardf.c26
6 files changed, 111 insertions, 192 deletions
diff --git a/sysdeps/ieee754/ldbl-128ibm/mpn2ldbl.c b/sysdeps/ieee754/ldbl-128ibm/mpn2ldbl.c
index 21d1e62dab..8a2d45e2d8 100644
--- a/sysdeps/ieee754/ldbl-128ibm/mpn2ldbl.c
+++ b/sysdeps/ieee754/ldbl-128ibm/mpn2ldbl.c
@@ -1,4 +1,4 @@
-/* Copyright (C) 1995, 1996, 1997, 1998, 1999, 2002, 2003, 2004, 2006, 2007
+/* Copyright (C) 1995, 1996, 1997, 1998, 1999, 2002, 2003, 2004, 2006
Free Software Foundation, Inc.
This file is part of the GNU C Library.
@@ -31,20 +31,19 @@ long double
__mpn_construct_long_double (mp_srcptr frac_ptr, int expt, int sign)
{
union ibm_extended_long_double u;
- unsigned long lzcount;
+ unsigned long hidden2, lzcount;
unsigned long long hi, lo;
- int exponent2;
u.ieee.negative = sign;
u.ieee.negative2 = sign;
u.ieee.exponent = expt + IBM_EXTENDED_LONG_DOUBLE_BIAS;
- u.ieee.exponent2 = 0;
- exponent2 = expt - 53 + IBM_EXTENDED_LONG_DOUBLE_BIAS;
+ u.ieee.exponent2 = expt - 53 + IBM_EXTENDED_LONG_DOUBLE_BIAS;
#if BITS_PER_MP_LIMB == 32
/* The low order 53 bits (52 + hidden) go into the lower double */
lo = frac_ptr[0];
lo |= (frac_ptr[1] & ((1LL << (53 - 32)) - 1)) << 32;
+ hidden2 = (frac_ptr[1] >> (52 - 32)) & ((mp_limb_t) 1);
/* The high order 53 bits (52 + hidden) go into the upper double */
hi = (frac_ptr[1] >> (53 - 32)) & ((1 << 11) - 1);
hi |= ((unsigned long long) frac_ptr[2]) << 11;
@@ -52,6 +51,7 @@ __mpn_construct_long_double (mp_srcptr frac_ptr, int expt, int sign)
#elif BITS_PER_MP_LIMB == 64
/* The low order 53 bits (52 + hidden) go into the lower double */
lo = frac_ptr[0] & (((mp_limb_t) 1 << 53) - 1);
+ hidden2 = (frac_ptr[0] >> 52) & ((mp_limb_t) 1);
/* The high order 53 bits (52 + hidden) go into the upper double */
hi = (frac_ptr[0] >> 53) & (((mp_limb_t) 1 << 11) - 1);
hi |= (frac_ptr[1] << 11);
@@ -59,62 +59,14 @@ __mpn_construct_long_double (mp_srcptr frac_ptr, int expt, int sign)
#error "mp_limb size " BITS_PER_MP_LIMB "not accounted for"
#endif
- if ((hi & (1LL << 52)) == 0 && (hi | lo) != 0)
- {
- /* denormal number */
- unsigned long long val = hi ? hi : lo;
-
- if (sizeof (val) == sizeof (long))
- lzcount = __builtin_clzl (val);
- else if ((val >> 32) != 0)
- lzcount = __builtin_clzl ((long) (val >> 32));
- else
- lzcount = __builtin_clzl ((long) val) + 32;
- if (hi)
- lzcount = lzcount - 11;
- else
- lzcount = lzcount + 42;
-
- if (lzcount > u.ieee.exponent)
- {
- lzcount = u.ieee.exponent;
- u.ieee.exponent = 0;
- exponent2 -= lzcount;
- }
- else
- {
- u.ieee.exponent -= (lzcount - 1);
- exponent2 -= (lzcount - 1);
- }
-
- if (lzcount <= 53)
- {
- hi = (hi << lzcount) | (lo >> (53 - lzcount));
- lo = (lo << lzcount) & ((1LL << 53) - 1);
- }
- else
- {
- hi = lo << (lzcount - 53);
- lo = 0;
- }
- }
-
if (lo != 0L)
{
/* hidden2 bit of low double controls rounding of the high double.
- If hidden2 is '1' and either the explicit mantissa is non-zero
- or hi is odd, then round up hi and adjust lo (2nd mantissa)
+ If hidden2 is '1' then round up hi and adjust lo (2nd mantissa)
plus change the sign of the low double to compensate. */
- if ((lo & (1LL << 52)) != 0
- && ((hi & 1) != 0 || (lo & ((1LL << 52) - 1))))
+ if (hidden2)
{
hi++;
- if ((hi & ((1LL << 52) - 1)) == 0)
- {
- if ((hi & (1LL << 53)) != 0)
- hi -= 1LL << 52;
- u.ieee.exponent++;
- }
u.ieee.negative2 = !sign;
lo = (1LL << 53) - lo;
}
@@ -133,18 +85,17 @@ __mpn_construct_long_double (mp_srcptr frac_ptr, int expt, int sign)
if (lzcount > 0)
{
lo = lo << lzcount;
- exponent2 = exponent2 - lzcount;
+ u.ieee.exponent2 = u.ieee.exponent2 - lzcount;
}
- if (exponent2 > 0)
- u.ieee.exponent2 = exponent2;
- else
- lo >>= 1 - exponent2;
}
else
- u.ieee.negative2 = 0;
+ {
+ u.ieee.negative2 = 0;
+ u.ieee.exponent2 = 0;
+ }
u.ieee.mantissa3 = lo & 0xffffffffLL;
- u.ieee.mantissa2 = (lo >> 32) & 0xfffff;
+ u.ieee.mantissa2 = (lo >> 32) & 0xffffff;
u.ieee.mantissa1 = hi & 0xffffffffLL;
u.ieee.mantissa0 = (hi >> 32) & ((1LL << (LDBL_MANT_DIG - 86)) - 1);
diff --git a/sysdeps/ieee754/ldbl-128ibm/printf_fphex.c b/sysdeps/ieee754/ldbl-128ibm/printf_fphex.c
index b2ad25e31f..2a7b70fabf 100644
--- a/sysdeps/ieee754/ldbl-128ibm/printf_fphex.c
+++ b/sysdeps/ieee754/ldbl-128ibm/printf_fphex.c
@@ -1,5 +1,5 @@
/* Print floating point number in hexadecimal notation according to ISO C99.
- Copyright (C) 1997,1998,1999,2000,2001,2002,2004,2006,2007
+ Copyright (C) 1997,1998,1999,2000,2001,2002,2004,2006
Free Software Foundation, Inc.
This file is part of the GNU C Library.
Contributed by Ulrich Drepper <drepper@cygnus.com>, 1997.
@@ -35,24 +35,21 @@ do { \
\
lo = ((long long)eldbl.ieee.mantissa2 << 32) | eldbl.ieee.mantissa3; \
hi = ((long long)eldbl.ieee.mantissa0 << 32) | eldbl.ieee.mantissa1; \
- lo <<= 7; /* pre-shift lo to match ieee854. */ \
- /* If the lower double is not a denomal or zero then set the hidden \
- 53rd bit. */ \
- if (eldbl.ieee.exponent2 != 0) \
- lo |= (1ULL << (52 + 7)); \
- else \
- lo <<= 1; \
- /* The lower double is normalized separately from the upper. We \
- may need to adjust the lower manitissa to reflect this. */ \
- ediff = eldbl.ieee.exponent - eldbl.ieee.exponent2; \
- if (ediff > 53 + 63) \
- lo = 0; \
- else if (ediff > 53) \
- lo = lo >> (ediff - 53); \
- else if (eldbl.ieee.exponent2 == 0 && ediff < 53) \
- lo = lo << (53 - ediff); \
- if (eldbl.ieee.negative != eldbl.ieee.negative2 \
- && (eldbl.ieee.exponent2 != 0 || lo != 0L)) \
+ /* If the lower double is not a denomal or zero then set the hidden \
+ 53rd bit. */ \
+ if (eldbl.ieee.exponent2 > 0x001) \
+ { \
+ lo |= (1ULL << 52); \
+ lo = lo << 7; /* pre-shift lo to match ieee854. */ \
+ /* The lower double is normalized separately from the upper. We \
+ may need to adjust the lower manitissa to reflect this. */ \
+ ediff = eldbl.ieee.exponent - eldbl.ieee.exponent2; \
+ if (ediff > 53) \
+ lo = lo >> (ediff-53); \
+ } \
+ \
+ if ((eldbl.ieee.negative != eldbl.ieee.negative2) \
+ && ((eldbl.ieee.exponent2 != 0) && (lo != 0L))) \
{ \
lo = (1ULL << 60) - lo; \
if (hi == 0L) \
diff --git a/sysdeps/ieee754/ldbl-128ibm/s_fpclassifyl.c b/sysdeps/ieee754/ldbl-128ibm/s_fpclassifyl.c
index 6999abc250..3ca178a3c5 100644
--- a/sysdeps/ieee754/ldbl-128ibm/s_fpclassifyl.c
+++ b/sysdeps/ieee754/ldbl-128ibm/s_fpclassifyl.c
@@ -1,5 +1,5 @@
/* Return classification value corresponding to argument.
- Copyright (C) 1997,1999,2002,2004,2006,2007 Free Software Foundation, Inc.
+ Copyright (C) 1997,1999,2002,2004,2006 Free Software Foundation, Inc.
This file is part of the GNU C Library.
Contributed by Ulrich Drepper <drepper@cygnus.com>, 1997 and
Jakub Jelinek <jj@ultra.linux.cz>, 1999.
@@ -30,16 +30,14 @@
* -NaN fffn nnnn nnnn nnnn xxxx xxxx xxxx xxxx
* +Inf 7ff0 0000 0000 0000 xxxx xxxx xxxx xxxx
* -Inf fff0 0000 0000 0000 xxxx xxxx xxxx xxxx
- * +0 0000 0000 0000 0000 xxxx xxxx xxxx xxxx
- * -0 8000 0000 0000 0000 xxxx xxxx xxxx xxxx
- * +normal 0360 0000 0000 0000 0000 0000 0000 0000 (smallest)
- * -normal 8360 0000 0000 0000 0000 0000 0000 0000 (smallest)
- * +normal 7fef ffff ffff ffff 7c8f ffff ffff fffe (largest)
- * +normal ffef ffff ffff ffff fc8f ffff ffff fffe (largest)
- * +denorm 0360 0000 0000 0000 8000 0000 0000 0001 (largest)
- * -denorm 8360 0000 0000 0000 0000 0000 0000 0001 (largest)
- * +denorm 000n nnnn nnnn nnnn xxxx xxxx xxxx xxxx
- * -denorm 800n nnnn nnnn nnnn xxxx xxxx xxxx xxxx
+ * +0 0000 0000 0000 0000
+ * -0 8000 0000 0000 0000
+ * +normal 001n nnnn nnnn nnnn (smallest)
+ * -normal 801n nnnn nnnn nnnn (smallest)
+ * +normal 7fen nnnn nnnn nnnn (largest)
+ * -normal ffen nnnn nnnn nnnn (largest)
+ * +denorm 000n nnnn nnnn nnnn
+ * -denorm 800n nnnn nnnn nnnn
*/
int
@@ -61,23 +59,12 @@ ___fpclassifyl (long double x)
/* +/-zero or +/- normal or +/- denormal */
if (hx & 0x7fffffffffffffffULL) {
/* +/- normal or +/- denormal */
- if ((hx & 0x7ff0000000000000ULL) > 0x0360000000000000ULL) {
+ if ((hx & 0x7ff0000000000000ULL) >= 0x0360000000000000ULL) {
/* +/- normal */
retval = FP_NORMAL;
} else {
- if ((hx & 0x7ff0000000000000ULL) == 0x0360000000000000ULL) {
- if ((lx & 0x7fffffffffffffff) /* lower is non-zero */
- && ((lx^hx) & 0x8000000000000000ULL)) { /* and sign differs */
- /* +/- denormal */
- retval = FP_SUBNORMAL;
- } else {
- /* +/- normal */
- retval = FP_NORMAL;
- }
- } else {
- /* +/- denormal */
- retval = FP_SUBNORMAL;
- }
+ /* +/- denormal */
+ retval = FP_SUBNORMAL;
}
} else {
/* +/- zero */
diff --git a/sysdeps/ieee754/ldbl-128ibm/s_nextafterl.c b/sysdeps/ieee754/ldbl-128ibm/s_nextafterl.c
index 39d0e6a5e3..e35ce50829 100644
--- a/sysdeps/ieee754/ldbl-128ibm/s_nextafterl.c
+++ b/sysdeps/ieee754/ldbl-128ibm/s_nextafterl.c
@@ -24,8 +24,8 @@ static char rcsid[] = "$NetBSD: $";
* Special cases:
*/
-#include <math.h>
-#include <math_private.h>
+#include "math.h"
+#include "math_private.h"
#include <math_ldbl_opt.h>
#ifdef __STDC__
@@ -35,7 +35,7 @@ static char rcsid[] = "$NetBSD: $";
long double x,y;
#endif
{
- int64_t hx,hy,ihx,ihy,ilx;
+ int64_t hx,hy,ihx,ihy,ilx,ily;
u_int64_t lx,ly;
GET_LDOUBLE_WORDS64(hx,lx,x);
@@ -43,6 +43,7 @@ static char rcsid[] = "$NetBSD: $";
ihx = hx&0x7fffffffffffffffLL; /* |hx| */
ilx = lx&0x7fffffffffffffffLL; /* |lx| */
ihy = hy&0x7fffffffffffffffLL; /* |hy| */
+ ily = ly&0x7fffffffffffffffLL; /* |ly| */
if((((ihx&0x7ff0000000000000LL)==0x7ff0000000000000LL)&&
((ihx&0x000fffffffffffffLL)!=0)) || /* x is nan */
@@ -52,67 +53,55 @@ static char rcsid[] = "$NetBSD: $";
if(x==y)
return y; /* x=y, return y */
if(ihx == 0 && ilx == 0) { /* x == 0 */
- long double u;
- hy = (hy & 0x8000000000000000ULL) | 1;
- SET_LDOUBLE_WORDS64(x,hy,0ULL);/* return +-minsubnormal */
- u = math_opt_barrier (x);
- u = u * u;
- math_force_eval (u); /* raise underflow flag */
- return x;
+ SET_LDOUBLE_WORDS64(x,hy&0x8000000000000000ULL,1);/* return +-minsubnormal */
+ y = x*x;
+ if(y==x) return y; else return x; /* raise underflow flag */
}
-
- long double u;
- if(x > y) { /* x > y, x -= ulp */
- if((hx==0xffefffffffffffffLL)&&(lx==0xfc8ffffffffffffeLL))
- return x+x; /* overflow, return -inf */
- if (hx >= 0x7ff0000000000000LL) {
- SET_LDOUBLE_WORDS64(u,0x7fefffffffffffffLL,0x7c8ffffffffffffeLL);
- return u;
- }
- if(ihx <= 0x0360000000000000LL) { /* x <= LDBL_MIN */
- u = math_opt_barrier (x);
- x -= __LDBL_DENORM_MIN__;
- if (ihx < 0x0360000000000000LL
- || (hx > 0 && (int64_t) lx <= 0)
- || (hx < 0 && (int64_t) lx > 1)) {
- u = u * u;
- math_force_eval (u); /* raise underflow flag */
- }
- return x;
+ if(ihx>=0) { /* x > 0 */
+ if(ihx>ihy||((ihx==ihy)&&(ilx>ily))) { /* x > y, x -= ulp */
+
+ if(ilx==0)
+ hx--;
+ else
+ lx--;
+ } else { /* x < y, x += ulp */
+ if((hx==0x7fefffffffffffffLL)&&(lx==0x7c8ffffffffffffeLL))
+ {
+ SET_LDOUBLE_WORDS64(x,0x7ff0000000000000,0x8000000000000000);
+ return x;
+ }
+ else if((hx==0xffefffffffffffffLL)&&(lx==0xfc8ffffffffffffeLL))
+ {
+ SET_LDOUBLE_WORDS64(x,0xfff0000000000000,0x8000000000000000);
+ return x;
+ }
+ else if((lx&0x7fffffffffffffff)==0) hx++;
+ else
+ lx++;
}
- if (ihx < 0x06a0000000000000LL) { /* ulp will denormal */
- SET_LDOUBLE_WORDS64(u,(hx&0x7ff0000000000000LL),0ULL);
- u *= 0x1.0000000000000p-105L;
- } else
- SET_LDOUBLE_WORDS64(u,(hx&0x7ff0000000000000LL)-0x0690000000000000LL,0ULL);
- return x - u;
- } else { /* x < y, x += ulp */
- if((hx==0x7fefffffffffffffLL)&&(lx==0x7c8ffffffffffffeLL))
- return x+x; /* overflow, return +inf */
- if ((u_int64_t) hx >= 0xfff0000000000000ULL) {
- SET_LDOUBLE_WORDS64(u,0xffefffffffffffffLL,0xfc8ffffffffffffeLL);
- return u;
+ } else { /* x < 0 */
+ if(ihy>=0||ihx>ihy||((ihx==ihy)&&(ilx>ily))){/* x < y, x -= ulp */
+ if((lx&0x7fffffffffffffff)==0)
+ hx--;
+ else
+ lx--;
+ } else { /* x > y, x += ulp */
+ if((lx&0x7fffffffffffffff)==0) hx++;
+ else
+ lx++;
}
- if(ihx <= 0x0360000000000000LL) { /* x <= LDBL_MIN */
- u = math_opt_barrier (x);
- x += __LDBL_DENORM_MIN__;
- if (ihx < 0x0360000000000000LL
- || (hx > 0 && (int64_t) lx < 0 && lx != 0x8000000000000001LL)
- || (hx < 0 && (int64_t) lx >= 0)) {
- u = u * u;
- math_force_eval (u); /* raise underflow flag */
- }
- if (x == 0.0L) /* handle negative __LDBL_DENORM_MIN__ case */
- x = -0.0L;
- return x;
+ }
+ hy = hx&0x7ff0000000000000LL;
+ if(hy==0x7ff0000000000000LL) return x+x;/* overflow */
+ if(hy==0) { /* underflow */
+ y = x*x;
+ if(y!=x) { /* raise underflow flag */
+ SET_LDOUBLE_WORDS64(y,hx,lx);
+ return y;
}
- if (ihx < 0x06a0000000000000LL) { /* ulp will denormal */
- SET_LDOUBLE_WORDS64(u,(hx&0x7ff0000000000000LL),0ULL);
- u *= 0x1.0000000000000p-105L;
- } else
- SET_LDOUBLE_WORDS64(u,(hx&0x7ff0000000000000LL)-0x0690000000000000LL,0ULL);
- return x + u;
}
+ SET_LDOUBLE_WORDS64(x,hx,lx);
+ return x;
}
strong_alias (__nextafterl, __nexttowardl)
long_double_symbol (libm, __nextafterl, nextafterl);
diff --git a/sysdeps/ieee754/ldbl-128ibm/s_nexttoward.c b/sysdeps/ieee754/ldbl-128ibm/s_nexttoward.c
index e2f6521f57..3335100592 100644
--- a/sysdeps/ieee754/ldbl-128ibm/s_nexttoward.c
+++ b/sysdeps/ieee754/ldbl-128ibm/s_nexttoward.c
@@ -26,7 +26,7 @@ static char rcsid[] = "$NetBSD: $";
*/
#include "math.h"
-#include <math_private.h>
+#include "math_private.h"
#include <math_ldbl_opt.h>
#include <float.h>
@@ -55,12 +55,10 @@ static char rcsid[] = "$NetBSD: $";
return x+y;
if((long double) x==y) return y; /* x=y, return y */
if((ix|lx)==0) { /* x == 0 */
- double u;
+ double x2;
INSERT_WORDS(x,(u_int32_t)((hy>>32)&0x80000000),1);/* return +-minsub */
- u = math_opt_barrier (x);
- u = u * u;
- math_force_eval (u); /* raise underflow flag */
- return x;
+ x2 = x*x;
+ if(x2==x) return x2; else return x; /* raise underflow flag */
}
if(hx>=0) { /* x > 0 */
if (hy<0||(ix>>20)>(iy>>52)
@@ -91,13 +89,16 @@ static char rcsid[] = "$NetBSD: $";
if(hy>=0x7ff00000) {
x = x+x; /* overflow */
if (FLT_EVAL_METHOD != 0 && FLT_EVAL_METHOD != 1)
- /* Force conversion to double. */
- asm ("" : "+m"(x));
+ /* Force conversion to float. */
+ asm ("" : "=m"(x) : "m"(x));
return x;
}
- if(hy<0x00100000) {
- double u = x*x; /* underflow */
- math_force_eval (u); /* raise underflow flag */
+ if(hy<0x00100000) { /* underflow */
+ double x2 = x*x;
+ if(x2!=x) { /* raise underflow flag */
+ INSERT_WORDS(x2,hx,lx);
+ return x2;
+ }
}
INSERT_WORDS(x,hx,lx);
return x;
diff --git a/sysdeps/ieee754/ldbl-128ibm/s_nexttowardf.c b/sysdeps/ieee754/ldbl-128ibm/s_nexttowardf.c
index cf655fad16..a9373ff822 100644
--- a/sysdeps/ieee754/ldbl-128ibm/s_nexttowardf.c
+++ b/sysdeps/ieee754/ldbl-128ibm/s_nexttowardf.c
@@ -19,9 +19,8 @@ static char rcsid[] = "$NetBSD: $";
#endif
#include "math.h"
-#include <math_private.h>
+#include "math_private.h"
#include <math_ldbl_opt.h>
-#include <float.h>
#ifdef __STDC__
float __nexttowardf(float x, long double y)
@@ -47,12 +46,10 @@ static char rcsid[] = "$NetBSD: $";
return x+y;
if((long double) x==y) return y; /* x=y, return y */
if(ix==0) { /* x == 0 */
- float u;
+ float x2;
SET_FLOAT_WORD(x,(u_int32_t)((hy>>32)&0x80000000)|1);/* return +-minsub*/
- u = math_opt_barrier (x);
- u = u * u;
- math_force_eval (u); /* raise underflow flag */
- return x;
+ x2 = x*x;
+ if(x2==x) return x2; else return x; /* raise underflow flag */
}
if(hx>=0) { /* x > 0 */
if(hy<0||(ix>>23)>(iy>>52)-0x380
@@ -72,16 +69,13 @@ static char rcsid[] = "$NetBSD: $";
}
}
hy = hx&0x7f800000;
- if(hy>=0x7f800000) {
- x = x+x; /* overflow */
- if (FLT_EVAL_METHOD != 0)
- /* Force conversion to float. */
- asm ("" : "+m"(x));
- return x;
- }
+ if(hy>=0x7f800000) return x+x; /* overflow */
if(hy<0x00800000) { /* underflow */
- float u = x*x;
- math_force_eval (u); /* raise underflow flag */
+ float x2 = x*x;
+ if(x2!=x) { /* raise underflow flag */
+ SET_FLOAT_WORD(x2,hx);
+ return x2;
+ }
}
SET_FLOAT_WORD(x,hx);
return x;
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