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Fix spurious underflow exceptions for Bessel functions for double (bug 14155).

This commit is contained in:
Joseph Myers 2013-03-14 17:47:30 +00:00
parent cbc105f8b5
commit 41c7328e85
4 changed files with 23 additions and 8 deletions
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13
ChangeLog
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@ -1,3 +1,16 @@
2013-03-14 Joseph Myers <joseph@codesourcery.com>
[BZ #14155]
* sysdeps/ieee754/dbl-64/e_j0.c (pzero): Return 1.0 for arguments
0x1p28 and above.
(qzero): Return -0.125 / x for arguments 0x1p28 and above.
* sysdeps/ieee754/dbl-64/e_j1.c (pzero): Return 1.0 for arguments
0x1p28 and above.
(qzero): Return 0.375 / x for arguments 0x1p28 and above.
* math/libm-test.inc (j0_test): Do not allow one spurious
underflow exception.
(y1_test): Likewise.
2013-03-14 Siddhesh Poyarekar <siddhesh@redhat.com>
* manual/Makefile (chapters): Add nptl.

6
math/libm-test.inc
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@ -6239,8 +6239,7 @@ j0_test (void)
TEST_f_f (j0, 4.0, -3.9714980986384737228659076845169804197562E-1L);
TEST_f_f (j0, -4.0, -3.9714980986384737228659076845169804197562E-1L);
/* Bug 14155: spurious exception may occur. */
TEST_f_f (j0, 0x1.d7ce3ap+107L, 2.775523647291230802651040996274861694514e-17L, UNDERFLOW_EXCEPTION_OK);
TEST_f_f (j0, 0x1.d7ce3ap+107L, 2.775523647291230802651040996274861694514e-17L);
#ifndef TEST_FLOAT
/* Bug 14155: spurious exception may occur. */
@ -10494,8 +10493,7 @@ y1_test (void)
TEST_f_f (y1, 8.0, -0.158060461731247494255555266187483550L);
TEST_f_f (y1, 10.0, 0.249015424206953883923283474663222803L);
/* Bug 14155: spurious exception may occur. */
TEST_f_f (y1, 0x1.27e204p+99L, -8.881610148467797208469612080785210013461e-16L, UNDERFLOW_EXCEPTION_OK);
TEST_f_f (y1, 0x1.27e204p+99L, -8.881610148467797208469612080785210013461e-16L);
#ifndef TEST_FLOAT
/* Bug 14155: spurious exception may occur. */

6
sysdeps/ieee754/dbl-64/e_j0.c
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@ -293,7 +293,8 @@ pzero(double x)
int32_t ix;
GET_HIGH_WORD(ix,x);
ix &= 0x7fffffff;
if(ix>=0x40200000) {p = pR8; q= pS8;}
if (ix>=0x41b00000) {return one;}
else if(ix>=0x40200000){p = pR8; q= pS8;}
else if(ix>=0x40122E8B){p = pR5; q= pS5;}
else if(ix>=0x4006DB6D){p = pR3; q= pS3;}
else if(ix>=0x40000000){p = pR2; q= pS2;}
@ -400,7 +401,8 @@ qzero(double x)
int32_t ix;
GET_HIGH_WORD(ix,x);
ix &= 0x7fffffff;
if(ix>=0x40200000) {p = qR8; q= qS8;}
if (ix>=0x41b00000) {return -.125/x;}
else if(ix>=0x40200000){p = qR8; q= qS8;}
else if(ix>=0x40122E8B){p = qR5; q= qS5;}
else if(ix>=0x4006DB6D){p = qR3; q= qS3;}
else if(ix>=0x40000000){p = qR2; q= qS2;}

6
sysdeps/ieee754/dbl-64/e_j1.c
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@ -291,7 +291,8 @@ pone(double x)
int32_t ix;
GET_HIGH_WORD(ix,x);
ix &= 0x7fffffff;
if(ix>=0x40200000) {p = pr8; q= ps8;}
if (ix>=0x41b00000) {return one;}
else if(ix>=0x40200000){p = pr8; q= ps8;}
else if(ix>=0x40122E8B){p = pr5; q= ps5;}
else if(ix>=0x4006DB6D){p = pr3; q= ps3;}
else if(ix>=0x40000000){p = pr2; q= ps2;}
@ -399,7 +400,8 @@ qone(double x)
int32_t ix;
GET_HIGH_WORD(ix,x);
ix &= 0x7fffffff;
if(ix>=0x40200000) {p = qr8; q= qs8;}
if (ix>=0x41b00000) {return .375/x;}
else if(ix>=0x40200000){p = qr8; q= qs8;}
else if(ix>=0x40122E8B){p = qr5; q= qs5;}
else if(ix>=0x4006DB6D){p = qr3; q= qs3;}
else if(ix>=0x40000000){p = qr2; q= qs2;}