diff options
Diffstat (limited to 'sysdeps/i386/fpu/e_expf.S')
| -rw-r--r-- | sysdeps/i386/fpu/e_expf.S | 74 |
1 files changed, 0 insertions, 74 deletions
diff --git a/sysdeps/i386/fpu/e_expf.S b/sysdeps/i386/fpu/e_expf.S deleted file mode 100644 index 65cb4ec204..0000000000 --- a/sysdeps/i386/fpu/e_expf.S +++ /dev/null @@ -1,74 +0,0 @@ -/* - * Written by J.T. Conklin <jtc@netbsd.org>. - * Public domain. - * Adapted for float type by Ulrich Drepper <drepper@cygnus.com>. - */ - -#include <machine/asm.h> -#include <i386-math-asm.h> - -DEFINE_FLT_MIN - -#ifdef PIC -# define MO(op) op##@GOTOFF(%ecx) -#else -# define MO(op) op -#endif - - .text -/* e^x = 2^(x * log2(e)) */ -ENTRY(__ieee754_expf) -#ifdef PIC - LOAD_PIC_REG (cx) -#endif - flds 4(%esp) -/* I added the following ugly construct because exp(+-Inf) resulted - in NaN. The ugliness results from the bright minds at Intel. - For the i686 the code can be written better. - -- drepper@cygnus.com. */ - fxam /* Is NaN or +-Inf? */ - fstsw %ax - movb $0x45, %dh - andb %ah, %dh - cmpb $0x05, %dh - je 1f /* Is +-Inf, jump. */ - fldl2e - fmulp /* x * log2(e) */ - fld %st - frndint /* int(x * log2(e)) */ - fsubr %st,%st(1) /* fract(x * log2(e)) */ - fxch - f2xm1 /* 2^(fract(x * log2(e))) - 1 */ - fld1 - faddp /* 2^(fract(x * log2(e))) */ - fscale /* e^x */ - fstp %st(1) - FLT_NARROW_EVAL_UFLOW_NONNEG_NAN - ret - -1: testl $0x200, %eax /* Test sign. */ - jz 2f /* If positive, jump. */ - fstp %st - fldz /* Set result to 0. */ -2: ret -END (__ieee754_expf) - - -ENTRY(__expf_finite) -#ifdef PIC - LOAD_PIC_REG (cx) -#endif - fldl2e - fmuls 4(%esp) /* x * log2(e) */ - fld %st - frndint /* int(x * log2(e)) */ - fsubr %st,%st(1) /* fract(x * log2(e)) */ - fxch - f2xm1 /* 2^(fract(x * log2(e))) - 1 */ - fld1 - faddp /* 2^(fract(x * log2(e))) */ - fscale /* e^x */ - fstp %st(1) - FLT_NARROW_EVAL_UFLOW_NONNEG - ret -END(__expf_finite) |