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From: Damian McGuckin <damianm@esi.com.au>
To: musl@lists.openwall.com
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Subject: Re: [musl] Considering x86-64 fenv.s to C


Merging for i386.

Comments?

fegetenv(fenv_t *e)

 	as per i387 assembler instruction - fnstenv
 	+ merge MXCSR exception bits into e-> __status_word exception bits

fesetenv (fenv_t *e)
 	as per i387 assembler instruction - fldenv
 	+ merge e->__control_word rounding bits into MXCSR rounding bits
 	+ clear MXCSR exception bits

feupdateenv(fenv_t *e)

 	merge existing MXCSR and X87 exception bits  e->__status_word
 	fesetenv(e) as above

feholdexcept(fenv_t)

 	fegetenv(e) as above
 	clear MXCSR exception bits
 	clear X87 exception bits

Regards - Damian

Pacific Engineering Systems International, 277-279 Broadway, Glebe NSW 2037
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