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| author | Ulrich Drepper <drepper@gmail.com> | 2011-10-12 11:27:51 -0400 |
|---|---|---|
| committer | Ulrich Drepper <drepper@gmail.com> | 2011-10-12 11:27:51 -0400 |
| commit | 0ac5ae2335292908f39031b1ea9fe8edce433c0f (patch) | |
| tree | f9d26c8abc0de39d18d4c13e70f6022cdc6b461f /sysdeps/x86_64/fpu/e_log10l.S | |
| parent | a843a204a3e8a0dd53584dad3668771abaec84ac (diff) | |
| download | glibc-0ac5ae2335292908f39031b1ea9fe8edce433c0f.tar.gz glibc-0ac5ae2335292908f39031b1ea9fe8edce433c0f.tar.xz glibc-0ac5ae2335292908f39031b1ea9fe8edce433c0f.zip | |
Optimize libm
libm is now somewhat integrated with gcc's -ffinite-math-only option and lots of the wrapper functions have been optimized.
Diffstat (limited to 'sysdeps/x86_64/fpu/e_log10l.S')
| -rw-r--r-- | sysdeps/x86_64/fpu/e_log10l.S | 27 |
1 files changed, 21 insertions, 6 deletions
diff --git a/sysdeps/x86_64/fpu/e_log10l.S b/sysdeps/x86_64/fpu/e_log10l.S index 633234b744..50c58757af 100644 --- a/sysdeps/x86_64/fpu/e_log10l.S +++ b/sysdeps/x86_64/fpu/e_log10l.S @@ -10,14 +10,12 @@ #include <machine/asm.h> -RCSID("$NetBSD: $") - #ifdef __ELF__ - .section .rodata + .section .rodata.cst8,"aM",@progbits,8 #else .text #endif - .align ALIGNARG(4) + .p2align 3 ASM_TYPE_DIRECTIVE(one,@object) one: .double 1.0 ASM_SIZE_DIRECTIVE(one) @@ -30,9 +28,9 @@ 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 @@ -65,3 +63,20 @@ ENTRY(__ieee754_log10l) fstp %st(1) ret END(__ieee754_log10l) + + +ENTRY(__log10l_finite) + fldlg2 // log10(2) + fldt 8(%rsp) // x : log10(2) + fld %st // x : x : log10(2) +4: fsubl MO(one) // x-1 : x : log10(2) + fld %st // x-1 : x-1 : x : log10(2) + fabs // |x-1| : x-1 : x : log10(2) + fcompl MO(limit) // x-1 : x : log10(2) + fnstsw // x-1 : x : log10(2) + andb $0x45, %ah + jz 2b + fstp %st(1) // x-1 : log10(2) + fyl2xp1 // log10(x) + ret +END(__log10l_finite) |