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|
; QuickThreads -- Threads-building toolkit.
; Copyright (c) 1993 by David Keppel
; Permission to use, copy, modify and distribute this software and
; its documentation for any purpose and without fee is hereby
; granted, provided that the above copyright notice and this notice
; appear in all copies. This software is provided as a
; proof-of-concept and for demonstration purposes; there is no
; representation about the suitability of this software for any
; purpose.
; This file (pa-risc_b.s) is part of the port of QuickThreads for
; PA-RISC 1.1 architecture. It contains assembly-level support for
; raw processor performance measurement. It was written in 1994 by
; Uwe Reder (`uereder@cip.informatik.uni-erlangen.de')
; for the Operating Systems Department (IMMD4) at the
; University of Erlangen/Nuernberg Germany.
; Note that the number of instructions in the measurement-loops, differ
; from implementation to implementation. I took eight instructions in a loop
; for every test (execute eight instructions and loop to the start).
.CODE
.IMPORT $global$,DATA
.IMPORT $$dyncall,MILLICODE
.EXPORT b_call_reg
.EXPORT b_call_imm
.EXPORT b_add
.EXPORT b_load
; Just do nothing, only return to caller. This procedure is called by
; `b_call_reg' and `b_call_imm'.
b_null
.PROC
.CALLINFO NO_CALLS, FRAME=0
.ENTRY
bv,n %r0(%rp) ; just return
.EXIT
.PROCEND
; Call the procedure `b_null' with function pointer in a register.
b_call_reg
.PROC
.CALLINFO CALLER, FRAME=0
.ENTRY
stwm %r3,64(%sp) ; store r3 (may be used by caller)
stw %rp,-20(%sp) ; save return-pointer to frame-marker
addil LR'to_call-$global$,%r27
ldw RR'to_call-$global$(%r1),%r3
_loop0
copy %r3,%r22 ; copy the procedure label to r22, ...
.CALL ; ...this is the input to $$dyncall
bl $$dyncall,%mrp ; call $$dyncall (millicode function)
copy %mrp,%rp ; remember the return-pointer
copy %r3,%r22
.CALL
bl $$dyncall,%mrp
copy %mrp,%rp
copy %r3,%r22
.CALL
bl $$dyncall,%mrp
copy %mrp,%rp
copy %r3,%r22
.CALL
bl $$dyncall,%mrp
copy %mrp,%rp
copy %r3,%r22
.CALL
bl $$dyncall,%mrp
copy %mrp,%rp
copy %r3,%r22
.CALL
bl $$dyncall,%mrp
copy %mrp,%rp
copy %r3,%r22
.CALL
bl $$dyncall,%mrp
copy %mrp,%rp
copy %r3,%r22
.CALL
bl $$dyncall,%mrp
copy %mrp,%rp
addibf,<= -8,%arg0,_loop0 ; decrement counter by 8 and loop
nop
ldw -20(%sp),%rp ; restore return-pointer
bv %r0(%rp) ; return to caller
ldwm -64(%sp),%r3 ; resore r3 and remove stack frame
.EXIT
.PROCEND
; Call the procedure `b_null' immediate.
b_call_imm
.PROC
.CALLINFO CALLER, FRAME=0, SAVE_RP
.ENTRY
ldo 64(%sp),%sp ; caller needs a stack-frame
stw %rp,-20(%sp) ; save return-pointer to frame-marker
_loop1
bl b_null,%rp ; call `b_null' immediate (8 times)
nop
bl b_null,%rp
nop
bl b_null,%rp
nop
bl b_null,%rp
nop
bl b_null,%rp
nop
bl b_null,%rp
nop
bl b_null,%rp
nop
bl b_null,%rp
nop
addibf,<= -8,%arg0,_loop1 ; decrement counter by 8 and loop
nop
ldw -20(%sp),%rp ; restore return-pointer
bv %r0(%rp) ; return to caller
ldo -64(%sp),%sp ; remove stack-frame
.EXIT
.PROCEND
; Copy register-to-register.
; On PA-RISC this is implemented with an `or'.
; The `or' is hidden by a pseudo-operation called `copy'.
b_add
.PROC
.CALLINFO NO_CALLS, FRAME=0
.ENTRY
_loop2
copy %r19,%r20 ; copy register-to-register
copy %r20,%r21 ; use caller-saves registers
copy %r21,%r22
copy %r22,%r21
copy %r21,%r20
copy %r20,%r19
copy %r19,%r20
copy %r20,%r21
addibf,<= -8,%arg0,_loop2 ; decrement counter by 8 and loop
nop
bv,n %r0(%rp)
.EXIT
.PROCEND
; Load memory to a register.
b_load
.PROC
.CALLINFO NO_CALLS, FRAME=0
.ENTRY
_loop3
ldw -4(%sp),%r22 ; load data from frame-marker
ldw -8(%sp),%r22 ; use a caller-saves register
ldw -12(%sp),%r22
ldw -16(%sp),%r22
ldw -20(%sp),%r22
ldw -24(%sp),%r22
ldw -28(%sp),%r22
ldw -32(%sp),%r22
addibf,<= -8,%arg0,_loop3 ; decrement counter by 8 and loop
nop
bv,n %r0(%rp)
.EXIT
.PROCEND
.ALIGN 8
to_call
.WORD b_null
|
