glibc/sysdeps/i386/i686/fpu/e_log.S

/*
 * Public domain.
 *
 * Adapted for i686 instructions.
 */

#include <machine/asm.h>
#include <libm-alias-finite.h>

	.text
ENTRY(__ieee754_log)
	fldln2			// log(2)
	fldl	4(%esp)		// x : log(2)
	fucomi	%st
	jp	3f
	fyl2x			// log(x)
	ret

3:	fstp	%st(1)
	ret
END (__ieee754_log)

ENTRY(__log_finite)
	fldln2			// log(2)
	fldl	4(%esp)		// x : log(2)
	fyl2x			// log(x)
	ret
END(__log_finite)
libm_alias_finite (__log_finite, __log)
Optimize x86-32 log 2011-10-15 03:41:47 +00:00			`/*`
			`* Public domain.`
			`*`
			`* Adapted for i686 instructions.`
			`*/`

			`#include <machine/asm.h>`
Add libm_alias_finite for _finite symbols This patch adds a new macro, libm_alias_finite, to define all _finite symbol. It sets all _finite symbol as compat symbol based on its first version (obtained from the definition at built generated first-versions.h). The <fn>f128_finite symbols were introduced in GLIBC 2.26 and so need special treatment in code that is shared between long double and float128. It is done by adding a list, similar to internal symbol redifinition, on sysdeps/ieee754/float128/float128_private.h. Alpha also needs some tricky changes to ensure we still emit 2 compat symbols for sqrt(f). Passes buildmanyglibc. Co-authored-by: Adhemerval Zanella <adhemerval.zanella@linaro.org> Reviewed-by: Siddhesh Poyarekar <siddhesh@sourceware.org> 2019-07-16 15:17:22 +00:00			`#include <libm-alias-finite.h>`
Optimize x86-32 log 2011-10-15 03:41:47 +00:00
			`.text`
			`ENTRY(__ieee754_log)`
			`fldln2 // log(2)`
			`fldl 4(%esp) // x : log(2)`
			`fucomi %st`
			`jp 3f`
			`fyl2x // log(x)`
			`ret`

			`3: fstp %st(1)`
			`ret`
			`END (__ieee754_log)`

			`ENTRY(__log_finite)`
			`fldln2 // log(2)`
			`fldl 4(%esp) // x : log(2)`
No need for boundary case handling in x86-32 __ieee_log 2011-10-16 02:21:53 +00:00			`fyl2x // log(x)`
Optimize x86-32 log 2011-10-15 03:41:47 +00:00			`ret`
			`END(__log_finite)`
Add libm_alias_finite for _finite symbols This patch adds a new macro, libm_alias_finite, to define all _finite symbol. It sets all _finite symbol as compat symbol based on its first version (obtained from the definition at built generated first-versions.h). The <fn>f128_finite symbols were introduced in GLIBC 2.26 and so need special treatment in code that is shared between long double and float128. It is done by adding a list, similar to internal symbol redifinition, on sysdeps/ieee754/float128/float128_private.h. Alpha also needs some tricky changes to ensure we still emit 2 compat symbols for sqrt(f). Passes buildmanyglibc. Co-authored-by: Adhemerval Zanella <adhemerval.zanella@linaro.org> Reviewed-by: Siddhesh Poyarekar <siddhesh@sourceware.org> 2019-07-16 15:17:22 +00:00			`libm_alias_finite (__log_finite, __log)`