Re: Computer architects leaving Intel...

On Tue, 17 Sep 2024 11:42:47 +0200
Terje Mathisen <terje.mathisen@tmsw.no> wrote:

Michael S wrote:

On Tue, 17 Sep 2024 08:20:15 +0200
Terje Mathisen <terje.mathisen@tmsw.no> wrote:
 

EricP wrote: 

These double-width bit-field straddle operations show up at
32-bits. Various FP64 formats (DEC's middle-endian FP being the
worst example), Intel page table entries and segment/gate
descriptors, come to mind. 

>
Lots of them in 32-bit code! 

 
Lot's of what in 32-bit code?
 

 
Pretty much any 64-bit container with non-regular contents, with the
suggest double / fp64 as the classic example?
 
Terje
 

You mean
struct { int a; double b; } where on 32-bit target we expect that b is
not padded?
And then mantissa of b crosses 64-bit boundary?
But mantissa of b is not accessed as bit field in a typical program.