Fix tan, tanl for large inputs.

4 files changed, 18 insertions, 113 deletions

diff --git a/sysdeps/i386/fpu/libm-test-ulps b/sysdeps/i386/fpu/libm-test-ulps
index 6f090e1417..d83b2339ca 100644
--- a/sysdeps/i386/fpu/libm-test-ulps
+++ b/sysdeps/i386/fpu/libm-test-ulps
@@ -1539,6 +1539,12 @@ idouble: 1
 ldouble: 7
 
 # tan
+Test "tan (0x1p16383) == 0.422722393732022337800504160054440141575":
+ildouble: 1
+ldouble: 1
+Test "tan (1e22) == -1.628778225606898878549375936939548513545":
+ildouble: 1
+ldouble: 1
 Test "tan (pi/4) == 1":
 double: 1
 float: 1
@@ -1551,9 +1557,13 @@ double: 1
 float: 2
 idouble: 1
 ifloat: 2
+ildouble: 1
+ldouble: 1
 Test "tan_downward (10) == 0.6483608274590866712591249330098086768169":
 float: 1
 ifloat: 1
+ildouble: 1
+ldouble: 1
 Test "tan_downward (2) == -2.1850398632615189916433061023136825434320":
 double: 1
 float: 1
@@ -1614,9 +1624,13 @@ double: 1
 float: 1
 idouble: 1
 ifloat: 1
+ildouble: 1
+ldouble: 1
 Test "tan_towardzero (10) == 0.6483608274590866712591249330098086768169":
 float: 1
 ifloat: 1
+ildouble: 1
+ldouble: 1
 Test "tan_towardzero (2) == -2.1850398632615189916433061023136825434320":
 ildouble: 1
 ldouble: 1
@@ -1681,8 +1695,8 @@ double: 1
 float: 1
 idouble: 1
 ifloat: 1
-ildouble: 1
-ldouble: 1
+ildouble: 2
+ldouble: 2
 Test "tan_upward (6) == -0.2910061913847491570536995888681755428312":
 ildouble: 1
 ldouble: 1
@@ -2366,6 +2380,8 @@ double: 1
 float: 1
 idouble: 1
 ifloat: 1
+ildouble: 1
+ldouble: 1
 
 Function: "tan_downward":
 double: 1
diff --git a/sysdeps/i386/fpu/mptan.c b/sysdeps/i386/fpu/mptan.c
deleted file mode 100644
index 1cc8931700..0000000000
--- a/sysdeps/i386/fpu/mptan.c
+++ /dev/null
@@ -1 +0,0 @@
-/* Not needed.  */
diff --git a/sysdeps/i386/fpu/s_tan.S b/sysdeps/i386/fpu/s_tan.S
deleted file mode 100644
index b35bb835de..0000000000
--- a/sysdeps/i386/fpu/s_tan.S
+++ /dev/null
@@ -1,55 +0,0 @@
-/*
- * Written by J.T. Conklin <jtc@netbsd.org>.
- * Fixed errno handling by Ulrich Drepper <drepper@redhat.com>.
- * Public domain.
- */
-
-#define __need_Emath
-#include <bits/errno.h>
-#include <machine/asm.h>
-
-RCSID("$NetBSD: s_tan.S,v 1.5 1995/05/09 00:30:00 jtc Exp $")
-
-ENTRY(__tan)
-	fldl	4(%esp)
-	fxam
-	fstsw	%ax
-	movb	$0x45, %dh
-	andb	%ah, %dh
-	cmpb	$0x05, %dh
-	je	3f
-4:	fptan
-	fnstsw	%ax
-	testl	$0x400,%eax
-	jnz	1f
-	fstp	%st(0)
-	ret
-1:	fldpi
-	fadd	%st(0)
-	fxch	%st(1)
-2:	fprem1
-	fstsw	%ax
-	testl	$0x400,%eax
-	jnz	2b
-	fstp	%st(1)
-	fptan
-	fstp	%st(0)
-	ret
-3:
-#ifdef PIC
-	pushl	%ebx
-	cfi_adjust_cfa_offset (4)
-	cfi_rel_offset (ebx, 0)
-	LOAD_PIC_REG (bx)
-	call	__errno_location@PLT
-	movl	$EDOM, (%eax)
-	popl	%ebx
-	cfi_adjust_cfa_offset (-4)
-	cfi_restore (ebx)
-#else
-	call	__errno_location@PLT
-	movl	$EDOM, (%eax)
-#endif
-	jmp	4b
-END (__tan)
-weak_alias (__tan, tan)
diff --git a/sysdeps/i386/fpu/s_tanl.S b/sysdeps/i386/fpu/s_tanl.S
deleted file mode 100644
index 151b77113f..0000000000
--- a/sysdeps/i386/fpu/s_tanl.S
+++ /dev/null
@@ -1,55 +0,0 @@
-/*
- * Written by J.T. Conklin <jtc@netbsd.org>.
- * Public domain.
- *
- * Adapted for `long double' by Ulrich Drepper <drepper@cygnus.com>.
- * Fixed errno handling by Ulrich Drepper <drepper@redhat.com>.
- */
-
-#define __need_Emath
-#include <bits/errno.h>
-#include <machine/asm.h>
-
-ENTRY(__tanl)
-	fldt	4(%esp)
-	fxam
-	fstsw	%ax
-	movb	$0x45, %dh
-	andb	%ah, %dh
-	cmpb	$0x05, %dh
-	je	3f
-4:	fptan
-	fnstsw	%ax
-	testl	$0x400,%eax
-	jnz	1f
-	fstp	%st(0)
-	ret
-1:	fldpi
-	fadd	%st(0)
-	fxch	%st(1)
-2:	fprem1
-	fstsw	%ax
-	testl	$0x400,%eax
-	jnz	2b
-	fstp	%st(1)
-	fptan
-	fstp	%st(0)
-	ret
-3:
-#ifdef PIC
-	pushl	%ebx
-	cfi_adjust_cfa_offset (4)
-	cfi_rel_offset (ebx, 0)
-	LOAD_PIC_REG (bx)
-	call	__errno_location@PLT
-	movl	$EDOM, (%eax)
-	popl	%ebx
-	cfi_adjust_cfa_offset (-4)
-	cfi_restore (ebx)
-#else
-	call	__errno_location@PLT
-	movl	$EDOM, (%eax)
-#endif
-	jmp	4b
-END (__tanl)
-weak_alias (__tanl, tanl)