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extflonums

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An extflonum is like a flonum, but with 80-bit precision and
not a number in the sense of `number?': only operations such as
`extfl+' work on extflonums, and only on platforms where extflonums
can be implemented by hardware without interefering with flonums
(i.e., on platforms where SSE instructions are used for
double-precision floats).

[Patch provided by Michael Filonenko and revised by Matthew.]

The compiler tracks information about bindings that are known to
hold extflonums, but the JIT does not yet exploit this information
to unbox them (except as intermediate results).

original commit: 17b8092641b245caf77bfb6ac29b525995a7bfea
This commit is contained in:
Michael Filonenko 2013-01-27 14:03:36 -07:00 committed by Matthew Flatt
parent f5fb6bf60e
commit 505e981046
1 changed files with 3 additions and 1 deletions
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4
collects/scribble/racket.rkt
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@ -5,6 +5,7 @@
"private/manual-sprop.rkt" "private/manual-sprop.rkt"
"private/on-demand.rkt" "private/on-demand.rkt"
file/convertible file/convertible
racket/extflonum
(for-syntax racket/base)) (for-syntax racket/base))
(provide define-code (provide define-code
@ -262,7 +263,8 @@
(char? v) (char? v)
(regexp? v) (regexp? v)
(byte-regexp? v) (byte-regexp? v)
(boolean? v))) (boolean? v)
(extflonum? v)))
value-color] value-color]
[(identifier? c) [(identifier? c)
(cond (cond