;; some FP constants can be generated in the i387 silicon
(fp-constant immediate-constant)
-
+ (fp-single-immediate immediate-constant)
+ (fp-double-immediate immediate-constant)
(immediate immediate-constant)
;;
;; non-descriptor SINGLE-FLOATs
(single-reg float-registers
:locations (0 1 2 3 4 5 6 7)
- :constant-scs (fp-constant)
+ :constant-scs (fp-constant fp-single-immediate)
:save-p t
:alternate-scs (single-stack))
;; non-descriptor DOUBLE-FLOATs
(double-reg float-registers
:locations (0 1 2 3 4 5 6 7)
- :constant-scs (fp-constant)
+ :constant-scs (fp-constant fp-double-immediate)
:save-p t
:alternate-scs (double-stack))
(when (static-symbol-p value)
(sc-number-or-lose 'immediate)))
(single-float
- (when (or (eql value 0f0) (eql value 1f0))
- (sc-number-or-lose 'fp-constant)))
+ (case value
+ ((0f0 1f0) (sc-number-or-lose 'fp-constant))
+ (t (sc-number-or-lose 'fp-single-immediate))))
(double-float
- (when (or (eql value 0d0) (eql value 1d0))
- (sc-number-or-lose 'fp-constant)))
+ (case value
+ ((0d0 1d0) (sc-number-or-lose 'fp-constant))
+ (t (sc-number-or-lose 'fp-double-immediate))))
#!+long-float
(long-float
- (when (or (eql value 0l0) (eql value 1l0)
- (eql value pi)
- (eql value (log 10l0 2l0))
- (eql value (log 2.718281828459045235360287471352662L0 2l0))
- (eql value (log 2l0 10l0))
- (eql value (log 2l0 2.718281828459045235360287471352662L0)))
- (sc-number-or-lose 'fp-constant)))))
+ (when (or (eql value 0l0) (eql value 1l0)
+ (eql value pi)
+ (eql value (log 10l0 2l0))
+ (eql value (log 2.718281828459045235360287471352662L0 2l0))
+ (eql value (log 2l0 10l0))
+ (eql value (log 2l0 2.718281828459045235360287471352662L0)))
+ (sc-number-or-lose 'fp-constant)))))
;; For an immediate TN, return its value encoded for use as a literal.
;; For any other TN, return the TN. Only works for FIXNUMs,
\f
;;;; miscellaneous function call parameters
-;;; offsets of special stack frame locations
-(def!constant ocfp-save-offset 1)
+;;; Offsets of special stack frame locations relative to EBP.
+;;;
+;;; Consider the standard prologue PUSH EBP; MOV EBP, ESP: the return
+;;; address is at EBP+4, the old control stack frame pointer is at
+;;; EBP, the magic 3rd slot is at EBP-4. Then come the locals from
+;;; EBP-8 on.
(def!constant return-pc-save-offset 0)
+(def!constant ocfp-save-offset 1)
+;;; Let SP be the stack pointer before CALLing, and FP is the frame
+;;; pointer after the standard prologue. SP +
+;;; FRAME-WORD-OFFSET(SP->FP-OFFSET + I) = FP + FRAME-WORD-OFFSET(I).
+(def!constant sp->fp-offset 2)
(declaim (inline frame-word-offset))
(defun frame-word-offset (index)
- (- (1+ index)))
+ (- (1- index)))
(declaim (inline frame-byte-offset))
(defun frame-byte-offset (index)