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Message-ID: <alpine.LRH.2.02.2002081032450.7271@key0.esi.com.au>
Date: Sat, 8 Feb 2020 10:53:13 +1100 (AEDT)
From: Damian McGuckin <damianm@....com.au>
To: musl@...ts.openwall.com
Subject: Re: 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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