X-Git-Url: http://review.tizen.org/git/?a=blobdiff_plain;f=sysdeps%2Fx86_64%2Ffpu%2Fe_log2l.S;h=140b93d101254d2693a613bcd1f17344a9c9033a;hb=622c86f48086403c889a2a16f2f09badde0eac7d;hp=f04d30a05a0ef5d63deb8d1f0c9d106e532a1030;hpb=0ecb606cb6cf65de1d9fc8a919bceb4be476c602;p=platform%2Fupstream%2Fglibc.git

diff --git a/sysdeps/x86_64/fpu/e_log2l.S b/sysdeps/x86_64/fpu/e_log2l.S
index f04d30a..140b93d 100644
--- a/sysdeps/x86_64/fpu/e_log2l.S
+++ b/sysdeps/x86_64/fpu/e_log2l.S
@@ -9,12 +9,9 @@
 
 #include <machine/asm.h>
 
-#ifdef __ELF__
-	.section .rodata
-#else
-	.text
-#endif
-	.align ALIGNARG(4)
+	.section .rodata.cst8,"aM",@progbits,8
+
+	.p2align 3
 	ASM_TYPE_DIRECTIVE(one,@object)
 one:	.double 1.0
 	ASM_SIZE_DIRECTIVE(one)
@@ -27,9 +24,9 @@ limit:	.double 0.29
 
 
 #ifdef PIC
-#define MO(op) op##(%rip)
+# define MO(op) op##(%rip)
 #else
-#define MO(op) op
+# define MO(op) op
 #endif
 
 	.text
@@ -62,3 +59,20 @@ ENTRY(__ieee754_log2l)
 	fstp	%st(1)
 	ret
 END (__ieee754_log2l)
+
+
+ENTRY(__log2l_finite)
+	fldl	MO(one)
+	fldt	8(%rsp)		// x : 1
+	fld	%st		// x : x : 1
+	fsub	%st(2), %st	// x-1 : x : 1
+	fld	%st		// x-1 : x-1 : x : 1
+	fabs			// |x-1| : x-1 : x : 1
+	fcompl	MO(limit)	// x-1 : x : 1
+	fnstsw			// x-1 : x : 1
+	andb	$0x45, %ah
+	jz	2b
+	fstp	%st(1)		// x-1 : 1
+	fyl2xp1			// log(x)
+	ret
+END (__log2l_finite)