Return to the
comp.compilers page.
Search the
comp.compilers archives again.
| Related articles |
|---|
| 8086 register allocation alexfrunews@gmail.com (Alexei A. Frounze) (2021-05-09) |
| Re: 8086 register allocation pronesto@gmail.com (Fernando) (2021-05-10) |
| Re: 8086 register allocation gah4@u.washington.edu (gah4) (2021-05-10) |
| Re: 8086 register allocation DrDiettrich1@netscape.net (Hans-Peter Diettrich) (2021-05-11) |
| Re: 8086 register allocation gah4@u.washington.edu (gah4) (2021-05-10) |
| Re: 8086 register allocation tkoenig@netcologne.de (Thomas Koenig) (2021-05-11) |
| Re: 8086 register allocation DrDiettrich1@netscape.net (Hans-Peter Diettrich) (2021-05-11) |
| From: | Hans-Peter Diettrich <DrDiettrich1@netscape.net> |
| Newsgroups: | comp.compilers |
| Date: | Tue, 11 May 2021 03:35:11 +0200 |
| Organization: | Compilers Central |
| References: | 21-05-005 21-05-007 |
| Injection-Info: | gal.iecc.com; posting-host="news.iecc.com:2001:470:1f07:1126:0:676f:7373:6970"; logging-data="73561"; mail-complaints-to="abuse@iecc.com" |
| Keywords: | arithmetic, architecture, comment |
| Posted-Date: | 10 May 2021 22:42:28 EDT |
| In-Reply-To: | 21-05-007 |
| Content-Language: | de-DE |
On 5/10/21 11:49 PM, gah4 wrote:
> It was also designed to have a virtual stack, which would spill to memory
> on overflow, and back on underflow. That sounds nice, but it seems that
> no-one tried to write the interrupt routine before the hardware was built,
> and that it actually isn't possible. It seems that it isn't possible to get some
> of the state bits set, such that it all works like a seamless virtual stack.
How efficient is a virtual stack? Did anybody try to use ordinary
(integral...) registers with interrupt driven spilling?
A stack machine is convenient for calculations. Before the stack
overflows the compiler can save intermediate results, as with any other
architecture of limited register count.
DoDi
[Normal stack machines have the top few entries in registers and do the
spilling to memory in hardware. The x87 stack has 8 registers, which is
a lot for a stack machine, but the spilling was broken. You can address
into the stack but you can't really use it as a register machine. -John]
Return to the
comp.compilers page.
Search the
comp.compilers archives again.