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http://sources.redhat.com/bugzilla/show_bug.cgi?id=5350
https://bugs.gentoo.org/264335
diff -durN glibc-2.10.1.orig/glibc-ports-2.10.1/sysdeps/alpha/fpu/s_ceil.c glibc-2.10.1/glibc-ports-2.10.1/sysdeps/alpha/fpu/s_ceil.c
--- glibc-2.10.1.orig/glibc-ports-2.10.1/sysdeps/alpha/fpu/s_ceil.c 2009-05-16 10:36:20.000000000 +0200
+++ glibc-2.10.1/glibc-ports-2.10.1/sysdeps/alpha/fpu/s_ceil.c 2009-11-13 00:50:59.000000000 +0100
@@ -27,20 +27,25 @@
double
__ceil (double x)
{
- double two52 = copysign (0x1.0p52, x);
- double r, tmp;
-
- __asm (
+ if (isless (fabs (x), 9007199254740992.0)) /* 1 << DBL_MANT_DIG */
+ {
+ double tmp1, new_x;
+
+ new_x = -x;
+ __asm (
#ifdef _IEEE_FP_INEXACT
- "addt/suim %2, %3, %1\n\tsubt/suim %1, %3, %0"
+ "cvttq/svim %2,%1\n\t"
#else
- "addt/sum %2, %3, %1\n\tsubt/sum %1, %3, %0"
+ "cvttq/svm %2,%1\n\t"
#endif
- : "=&f"(r), "=&f"(tmp)
- : "f"(-x), "f"(-two52));
+ "cvtqt/m %1,%0\n\t"
+ : "=f"(new_x), "=&f"(tmp1)
+ : "f"(new_x));
- /* Fix up the negation we did above, as well as handling -0 properly. */
- return copysign (r, x);
+ /* Fix up the negation we did above, as well as handling -0 properly. */
+ x = copysign(new_x, x);
+ }
+ return x;
}
weak_alias (__ceil, ceil)
diff -durN glibc-2.10.1.orig/glibc-ports-2.10.1/sysdeps/alpha/fpu/s_ceilf.c glibc-2.10.1/glibc-ports-2.10.1/sysdeps/alpha/fpu/s_ceilf.c
--- glibc-2.10.1.orig/glibc-ports-2.10.1/sysdeps/alpha/fpu/s_ceilf.c 2009-05-16 10:36:20.000000000 +0200
+++ glibc-2.10.1/glibc-ports-2.10.1/sysdeps/alpha/fpu/s_ceilf.c 2009-11-13 00:50:59.000000000 +0100
@@ -26,20 +26,30 @@
float
__ceilf (float x)
{
- float two23 = copysignf (0x1.0p23, x);
- float r, tmp;
-
- __asm (
+ if (isless (fabsf (x), 16777216.0f)) /* 1 << FLT_MANT_DIG */
+ {
+ /* Note that Alpha S_Floating is stored in registers in a
+ restricted T_Floating format, so we don't even need to
+ convert back to S_Floating in the end. The initial
+ conversion to T_Floating is needed to handle denormals. */
+
+ float tmp1, tmp2, new_x;
+
+ new_x = -x;
+ __asm ("cvtst/s %3,%2\n\t"
#ifdef _IEEE_FP_INEXACT
- "adds/suim %2, %3, %1\n\tsubs/suim %1, %3, %0"
+ "cvttq/svim %2,%1\n\t"
#else
- "adds/sum %2, %3, %1\n\tsubs/sum %1, %3, %0"
+ "cvttq/svm %2,%1\n\t"
#endif
- : "=&f"(r), "=&f"(tmp)
- : "f"(-x), "f"(-two23));
+ "cvtqt/m %1,%0\n\t"
+ : "=f"(new_x), "=&f"(tmp1), "=&f"(tmp2)
+ : "f"(new_x));
- /* Fix up the negation we did above, as well as handling -0 properly. */
- return copysignf (r, x);
+ /* Fix up the negation we did above, as well as handling -0 properly. */
+ x = copysignf(new_x, x);
+ }
+ return x;
}
weak_alias (__ceilf, ceilf)
diff -durN glibc-2.10.1.orig/glibc-ports-2.10.1/sysdeps/alpha/fpu/s_floor.c glibc-2.10.1/glibc-ports-2.10.1/sysdeps/alpha/fpu/s_floor.c
--- glibc-2.10.1.orig/glibc-ports-2.10.1/sysdeps/alpha/fpu/s_floor.c 2009-05-16 10:36:20.000000000 +0200
+++ glibc-2.10.1/glibc-ports-2.10.1/sysdeps/alpha/fpu/s_floor.c 2009-11-13 00:50:59.000000000 +0100
@@ -21,26 +21,32 @@
#include <math_ldbl_opt.h>
-/* Use the -inf rounding mode conversion instructions to implement floor. */
+/* Use the -inf rounding mode conversion instructions to implement
+ floor. We note when the exponent is large enough that the value
+ must be integral, as this avoids unpleasant integer overflows. */
double
__floor (double x)
{
- double two52 = copysign (0x1.0p52, x);
- double r, tmp;
-
- __asm (
+ if (isless (fabs (x), 9007199254740992.0)) /* 1 << DBL_MANT_DIG */
+ {
+ double tmp1, new_x;
+
+ __asm (
#ifdef _IEEE_FP_INEXACT
- "addt/suim %2, %3, %1\n\tsubt/suim %1, %3, %0"
+ "cvttq/svim %2,%1\n\t"
#else
- "addt/sum %2, %3, %1\n\tsubt/sum %1, %3, %0"
+ "cvttq/svm %2,%1\n\t"
#endif
- : "=&f"(r), "=&f"(tmp)
- : "f"(x), "f"(two52));
+ "cvtqt/m %1,%0\n\t"
+ : "=f"(new_x), "=&f"(tmp1)
+ : "f"(x));
- /* floor(-0) == -0, and in general we'll always have the same
- sign as our input. */
- return copysign (r, x);
+ /* floor(-0) == -0, and in general we'll always have the same
+ sign as our input. */
+ x = copysign(new_x, x);
+ }
+ return x;
}
weak_alias (__floor, floor)
diff -durN glibc-2.10.1.orig/glibc-ports-2.10.1/sysdeps/alpha/fpu/s_floorf.c glibc-2.10.1/glibc-ports-2.10.1/sysdeps/alpha/fpu/s_floorf.c
--- glibc-2.10.1.orig/glibc-ports-2.10.1/sysdeps/alpha/fpu/s_floorf.c 2009-05-16 10:36:20.000000000 +0200
+++ glibc-2.10.1/glibc-ports-2.10.1/sysdeps/alpha/fpu/s_floorf.c 2009-11-13 00:50:59.000000000 +0100
@@ -20,26 +20,37 @@
#include <math.h>
-/* Use the -inf rounding mode conversion instructions to implement floor. */
+/* Use the -inf rounding mode conversion instructions to implement
+ floor. We note when the exponent is large enough that the value
+ must be integral, as this avoids unpleasant integer overflows. */
float
__floorf (float x)
{
- float two23 = copysignf (0x1.0p23, x);
- float r, tmp;
-
- __asm (
+ if (isless (fabsf (x), 16777216.0f)) /* 1 << FLT_MANT_DIG */
+ {
+ /* Note that Alpha S_Floating is stored in registers in a
+ restricted T_Floating format, so we don't even need to
+ convert back to S_Floating in the end. The initial
+ conversion to T_Floating is needed to handle denormals. */
+
+ float tmp1, tmp2, new_x;
+
+ __asm ("cvtst/s %3,%2\n\t"
#ifdef _IEEE_FP_INEXACT
- "adds/suim %2, %3, %1\n\tsubs/suim %1, %3, %0"
+ "cvttq/svim %2,%1\n\t"
#else
- "adds/sum %2, %3, %1\n\tsubs/sum %1, %3, %0"
+ "cvttq/svm %2,%1\n\t"
#endif
- : "=&f"(r), "=&f"(tmp)
- : "f"(x), "f"(two23));
+ "cvtqt/m %1,%0\n\t"
+ : "=f"(new_x), "=&f"(tmp1), "=&f"(tmp2)
+ : "f"(x));
- /* floor(-0) == -0, and in general we'll always have the same
- sign as our input. */
- return copysignf (r, x);
+ /* floor(-0) == -0, and in general we'll always have the same
+ sign as our input. */
+ x = copysignf(new_x, x);
+ }
+ return x;
}
weak_alias (__floorf, floorf)
diff -durN glibc-2.10.1.orig/glibc-ports-2.10.1/sysdeps/alpha/fpu/s_rint.c glibc-2.10.1/glibc-ports-2.10.1/sysdeps/alpha/fpu/s_rint.c
--- glibc-2.10.1.orig/glibc-ports-2.10.1/sysdeps/alpha/fpu/s_rint.c 2009-05-16 10:36:20.000000000 +0200
+++ glibc-2.10.1/glibc-ports-2.10.1/sysdeps/alpha/fpu/s_rint.c 2009-11-13 00:50:59.000000000 +0100
@@ -24,15 +24,24 @@
double
__rint (double x)
{
- double two52 = copysign (0x1.0p52, x);
- double r;
-
- r = x + two52;
- r = r - two52;
+ if (isless (fabs (x), 9007199254740992.0)) /* 1 << DBL_MANT_DIG */
+ {
+ double tmp1, new_x;
+ __asm (
+#ifdef _IEEE_FP_INEXACT
+ "cvttq/svid %2,%1\n\t"
+#else
+ "cvttq/svd %2,%1\n\t"
+#endif
+ "cvtqt/d %1,%0\n\t"
+ : "=f"(new_x), "=&f"(tmp1)
+ : "f"(x));
- /* rint(-0.1) == -0, and in general we'll always have the same sign
- as our input. */
- return copysign (r, x);
+ /* rint(-0.1) == -0, and in general we'll always have the same
+ sign as our input. */
+ x = copysign(new_x, x);
+ }
+ return x;
}
weak_alias (__rint, rint)
diff -durN glibc-2.10.1.orig/glibc-ports-2.10.1/sysdeps/alpha/fpu/s_rintf.c glibc-2.10.1/glibc-ports-2.10.1/sysdeps/alpha/fpu/s_rintf.c
--- glibc-2.10.1.orig/glibc-ports-2.10.1/sysdeps/alpha/fpu/s_rintf.c 2009-05-16 10:36:20.000000000 +0200
+++ glibc-2.10.1/glibc-ports-2.10.1/sysdeps/alpha/fpu/s_rintf.c 2009-11-13 00:50:59.000000000 +0100
@@ -23,15 +23,30 @@
float
__rintf (float x)
{
- float two23 = copysignf (0x1.0p23, x);
- float r;
+ if (isless (fabsf (x), 16777216.0f)) /* 1 << FLT_MANT_DIG */
+ {
+ /* Note that Alpha S_Floating is stored in registers in a
+ restricted T_Floating format, so we don't even need to
+ convert back to S_Floating in the end. The initial
+ conversion to T_Floating is needed to handle denormals. */
- r = x + two23;
- r = r - two23;
+ float tmp1, tmp2, new_x;
- /* rint(-0.1) == -0, and in general we'll always have the same sign
- as our input. */
- return copysign (r, x);
+ __asm ("cvtst/s %3,%2\n\t"
+#ifdef _IEEE_FP_INEXACT
+ "cvttq/svid %2,%1\n\t"
+#else
+ "cvttq/svd %2,%1\n\t"
+#endif
+ "cvtqt/d %1,%0\n\t"
+ : "=f"(new_x), "=&f"(tmp1), "=&f"(tmp2)
+ : "f"(x));
+
+ /* rint(-0.1) == -0, and in general we'll always have the same
+ sign as our input. */
+ x = copysignf(new_x, x);
+ }
+ return x;
}
weak_alias (__rintf, rintf)
diff -durN glibc-2.10.1.orig/ports/sysdeps/alpha/fpu/s_ceil.c glibc-2.10.1/ports/sysdeps/alpha/fpu/s_ceil.c
diff -durN glibc-2.10.1.orig/ports/sysdeps/alpha/fpu/s_ceilf.c glibc-2.10.1/ports/sysdeps/alpha/fpu/s_ceilf.c
diff -durN glibc-2.10.1.orig/ports/sysdeps/alpha/fpu/s_floor.c glibc-2.10.1/ports/sysdeps/alpha/fpu/s_floor.c
diff -durN glibc-2.10.1.orig/ports/sysdeps/alpha/fpu/s_floorf.c glibc-2.10.1/ports/sysdeps/alpha/fpu/s_floorf.c
diff -durN glibc-2.10.1.orig/ports/sysdeps/alpha/fpu/s_rint.c glibc-2.10.1/ports/sysdeps/alpha/fpu/s_rint.c
diff -durN glibc-2.10.1.orig/ports/sysdeps/alpha/fpu/s_rintf.c glibc-2.10.1/ports/sysdeps/alpha/fpu/s_rintf.c
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