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Diffstat (limited to 'qt/md/ksr1.s')
-rw-r--r-- | qt/md/ksr1.s | 424 |
1 files changed, 0 insertions, 424 deletions
diff --git a/qt/md/ksr1.s b/qt/md/ksr1.s deleted file mode 100644 index d4d51a0a6..000000000 --- a/qt/md/ksr1.s +++ /dev/null @@ -1,424 +0,0 @@ -/* - * 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. - */ - - .file "ksr1.s" - .def .debug; .endef - - .align 128 - .globl qt_blocki - .globl qt_blocki$TXT - .globl qt_block - .globl qt_block$TXT - .globl qt_start$TXT - .globl qt_start - .globl qt_abort$TXT - .globl qt_abort - .globl qt_vstart - .globl qt_vstart$TXT - -# -# KSR convention: on procedure calls, load both the procedure address -# and a pointer to a constant block. The address of function `f' is -# `f$TXT', and the constant block address is `f'. The constant block -# has several reserved values: -# -# 8 bytes fpu register save mask -# 4 bytes ipu register save mask -# 4 bytes ceu register save mask -# f: f$TXT -# ... whatever you want ... (not quite...read on) -# -# Note, by the way, that a pointer to a function is passed as a -# pointer to the constant area, and the constant area has the text -# address. -# - -# -# Procedures that do not return structures prefix their code with -# -# proc$TXT: -# finop; cxnop -# finop; cxnop -# <proc code> -# -# Calls to those procedures branch to a 16 byte offset (4 instrs) in -# to the procedure to skip those instructions. -# -# Procedures that return structures use a different code prefix: -# -# proc$TXT: -# finop; beq.qt %rc, %rc, 24 # return value entry -# finop; cxnop -# finop; movi8 0, %rc # no return value entry -# <proc code> -# -# Calls that want the returned structure branch directly to the -# procedure address. Callers that don't want (or aren't expecting) a -# return value branche 16 bytes in to the procedure, which will zero -# %rc, telling the called procedure not to return a structure. -# - -# -# On entry: -# %i2 -- control block of helper function to run -# (dereference to get helper) -# %i3 -- a1 -# %i4 -- a2 -# %i5 -- sp of new to run -# - - .data - .half 0x0, 0x0, 0x7ffff000, 0x7fff8000 -qt_blocki: -qt_abort: - .word qt_blocki$TXT - .word qt_restore$TXT - - .text -qt_abort$TXT: -qt_blocki$TXT: - finop ; cxnop # entry prefix - finop ; cxnop # entry prefix - add8.ntr 75,%i31,%i31 ; movi8 512,%c5 # ICR; stk adjust - finop ; ssub8.ntr 0,%sp,%c5,%sp - finop ; st8 %fp,504(%sp) # Save caller's fp - finop ; st8 %cp,496(%sp) # Save caller's cp - finop ; ld8 8(%c10),%c5 # ld qt_restore$TXT - finop ; st8 %c14,0(%sp) # Save special ret addr - finop ; mov8_8 %c10, %cp # Our cp - finop ; sadd8.ntr 0,%sp,%c5,%fp # Our frame ptr - finop ; st8 %c5,8(%sp) # st qt_restore$TXT -# -# CEU registers %c15-%c24, %c26-%c30 (%c14 we restore later) -# - finop ; st8 %c15,456(%sp) - finop ; st8 %c16,448(%sp) - finop ; st8 %c17,440(%sp) - finop ; st8 %c18,432(%sp) - finop ; st8 %c19,424(%sp) - finop ; st8 %c20,416(%sp) - finop ; st8 %c21,408(%sp) - finop ; st8 %c22,400(%sp) - finop ; st8 %c23,392(%sp) - finop ; st8 %c24,384(%sp) -# -# %c25 is the Enclosing Frame Pointer (EFP) -- since C doesn't -# use nested procedures, we ignore it (leaving a gap, though) -# - finop ; st8 %c26,368(%sp) - finop ; st8 %c27,360(%sp) - finop ; st8 %c28,352(%sp) - finop ; st8 %c29,344(%sp) - finop ; st8 %c30,336(%sp) -# -# IPU registers %i12-%i30 -# - finop ; st8 %i12,328(%sp) - finop ; st8 %i13,320(%sp) - finop ; st8 %i14,312(%sp) - finop ; st8 %i15,304(%sp) -# (gap to get alignment for st64) -# -- Doesn't work on version 1.1.3 of the OS -# finop ; st64 %i16,256(%sp) - - finop ; st8 %i16,256(%sp) - finop ; st8 %i17,248(%sp) - finop ; st8 %i18,240(%sp) - finop ; st8 %i19,232(%sp) - finop ; st8 %i20,224(%sp) - finop ; st8 %i21,216(%sp) - finop ; st8 %i22,208(%sp) - finop ; st8 %i23,200(%sp) - finop ; st8 %i24,192(%sp) - finop ; st8 %i25,184(%sp) - finop ; st8 %i26,176(%sp) - finop ; st8 %i27,168(%sp) - finop ; st8 %i28,160(%sp) - finop ; st8 %i29,152(%sp) - finop ; st8 %i30,144(%sp) -# -# FPU already saved, or saving not necessary -# - -# -# Switch to the stack passed in as fourth argument to the block -# routine (%i5) and call the helper routine passed in as the first -# argument (%i2). Note that the address of the helper's constant -# block is passed in, so we must derefence it to get the helper's text -# address. -# - finop ; movb8_8 %i2,%c10 # helper's ConstBlock - finop ; cxnop # Delay slot, fill w/ - finop ; cxnop # .. 2 st8 from above - finop ; ld8 0(%c10),%c4 # load addr of helper - finop ; movb8_8 %sp, %i2 # 1st arg to helper - # is this stack; other - # args remain in regs - finop ; movb8_8 %i5,%sp # switch stacks - finop ; jsr %c14,16(%c4) # call helper - movi8 3, %i0 ; movi8 0,%c8 # nargs brain dmg - finop ; cxnop - finop ; cxnop -# -# Here is where behavior differs for threads being restored and threads -# being started. Blocked threads have a pointer to qt_restore$TXT on -# the top of their stacks; manufactured stacks have a pointer to qt_start$TXT -# on the top of their stacks. With this setup, starting threads -# skip the (unecessary) restore operations. -# -# We jump to an offset of 16 to either (1) skip past the two noop pairs -# at the start of qt_start$TXT, or (2) skip past the two noop pairs -# after qt_restore$TXT. -# - finop ; ld8 8(%sp),%c4 - finop ; cxnop - finop ; cxnop - finop ; jmp 16(%c4) -qt_restore$TXT: - finop ; cxnop - finop ; cxnop -# -# Point of Restore: -# -# The helper funtion will return here. Any result it has placed in -# a return register (most likely %i0) will not get overwritten below -# and will consequently be the return value of the blocking routine. -# - -# -# CEU registers %c15-%c24, %c26-%c30 (%c14 we restore later) -# - finop ; ld8 456(%sp),%c15 - finop ; ld8 448(%sp),%c16 - finop ; ld8 440(%sp),%c17 - finop ; ld8 432(%sp),%c18 - finop ; ld8 424(%sp),%c19 - finop ; ld8 416(%sp),%c20 - finop ; ld8 408(%sp),%c21 - finop ; ld8 400(%sp),%c22 - finop ; ld8 392(%sp),%c23 - finop ; ld8 384(%sp),%c24 -# -# %c25 is the Enclosing Frame Pointer (EFP) -- since C doesn't -# use nested procedures, we ignore it (leaving a gap, though) -# - finop ; ld8 368(%sp),%c26 - finop ; ld8 360(%sp),%c27 - finop ; ld8 352(%sp),%c28 - finop ; ld8 344(%sp),%c29 - finop ; ld8 336(%sp),%c30 -# -# IPU registers %i12-%i30 -# - finop ; ld8 328(%sp),%i12 - finop ; ld8 320(%sp),%i13 - finop ; ld8 312(%sp),%i14 - finop ; ld8 304(%sp),%i15 -# (gap to get alignment for ld64) -# -- Doesn't work on version 1.1.3 of the OS -# finop ; ld64 256(%sp),%i16 - - finop ; ld8 256(%sp),%i16 - finop ; ld8 248(%sp),%i17 - finop ; ld8 240(%sp),%i18 - finop ; ld8 232(%sp),%i19 - finop ; ld8 224(%sp),%i20 - finop ; ld8 216(%sp),%i21 - finop ; ld8 208(%sp),%i22 - finop ; ld8 200(%sp),%i23 - finop ; ld8 192(%sp),%i24 - finop ; ld8 184(%sp),%i25 - finop ; ld8 176(%sp),%i26 - finop ; ld8 168(%sp),%i27 - finop ; ld8 160(%sp),%i28 - finop ; ld8 152(%sp),%i29 - finop ; ld8 144(%sp),%i30 - -# -# FPU registers don't need to be loaded, or will be loaded by an -# enclosing scope (e.g., if this is called by qt_block). -# - -# -# Load the special registers. We don't load the stack ptr because -# the new stack is passed in as an argument, we don't load the EFP -# because we don't use it, and we load the return address specially -# off the top of the stack. -# - finop ; ld8 0(%sp),%c14 # return addr - finop ; ld8 496(%sp),%cp - finop ; ld8 504(%sp),%fp - - finop ; jmp 32(%c14) # jump back to thread - finop ; movi8 512,%c5 # stack adjust - finop ; sadd8.ntr 0,%sp,%c5,%sp - - .data - .half 0x0, 0x0, 0x7ffff000, 0x7fff8000 -qt_block: - .word qt_block$TXT - .word qt_error - .word qt_error$TXT - .word qt_blocki -# -# Handle saving and restoring the FPU regs, relying on qt_blocki -# to save and restore the remaining registers. -# - .text -qt_block$TXT: - finop ; cxnop # entry prefix - finop ; cxnop # entry prefix - - add8.ntr 29,%i31,%i31 ; movi8 512,%c5 # ICR; stk adjust - finop ; ssub8.ntr 0,%sp,%c5,%sp - finop ; st8 %fp,504(%sp) # Save caller's fp - finop ; st8 %cp,496(%sp) # Save caller's cp - finop ; st8 %c14,488(%sp) # store ret addr - finop ; sadd8.ntr 0,%sp,%c5,%fp # Our frame ptr - finop ; mov8_8 %c10, %cp # Our cp - -# -# Store 8 registers at once...destination must be a multiple of 64 -# - finop ; st64 %f16,384(%sp) - finop ; st64 %f24,320(%sp) - finop ; st64 %f32,256(%sp) - finop ; st64 %f40,192(%sp) - finop ; st64 %f48,128(%sp) - finop ; st64 %f56,64(%sp) - -# -# Call the integer blocking routine, passing the arguments passed to us -# - finop ; ld8 24(%cp), %c10 - finop ; cxnop - finop ; jsr %c14, qt_blocki$TXT - finop ; cxnop - finop ; cxnop - movi8 4,%i0 ; movi8 0,%c8 # nargs brain dmg - -# -# Load 8 registers at once...source must be a multiple of 64 -# - finop ; ld64 64(%sp),%f56 - finop ; ld64 128(%sp),%f48 - finop ; ld64 192(%sp),%f40 - finop ; ld64 256(%sp),%f32 - finop ; ld64 320(%sp),%f24 - finop ; ld64 384(%sp),%f16 - - finop ; ld8 488(%sp),%c14 - finop ; ld8 496(%sp),%cp - finop ; ld8 504(%sp),%fp - finop ; jmp 32(%c14) # jump back to thread - finop ; movi8 512,%c5 # stack adjust - finop ; sadd8.ntr 0,%sp,%c5,%sp - - - .data - .half 0x0, 0x0, 0x7ffff000, 0x7fff8000 -qt_start: - .word qt_start$TXT -# -# A new thread is set up to "appear" as if it were executing code at -# the beginning of qt_start and then it called a blocking routine -# (qt_blocki). So when a new thread starts to run, it gets unblocked -# by the code above and "returns" to `qt_start$TXT' in the -# restore step of the switch. Blocked threads jump to 16(qt_restore$TXT), -# and starting threads jump to 16(qt_start$TXT). -# - .text -qt_start$TXT: - finop ; cxnop # - finop ; cxnop # - finop ; ld8 40(%sp),%c10 # `only' constant block - finop ; ld8 32(%sp),%i4 # `userf' arg. - finop ; ld8 24(%sp),%i3 # `t' arg. - finop ; ld8 0(%c10),%c4 # `only' text location - finop ; ld8 16(%sp),%i2 # `u' arg. - finop ; cxnop - finop ; jsr %c14,16(%c4) # call `only' -# -# Pop the frame used to store the thread's initial data -# - finop ; sadd8.ntr 0,%sp,128,%sp - finop ; cxnop - movi8 2,%i0 ; movi8 0,%c8 # nargs brain dmg -# -# If we ever return, it's an error. -# - finop ; jmp qt_error$TXT - finop ; cxnop - finop ; cxnop - movi8 0,%i0 ; movi8 0,%c8 # nargs brain dmg - - -# -# This stuff is broken -# - .data - .half 0x0, 0x0, 0x7ffff000, 0x7fff8000 -qt_vstart: - .word qt_vstart$TXT - - .text -qt_vstart$TXT: - finop ; cxnop # entry prefix - finop ; cxnop # entry prefix - finop ; cxnop - finop ; cxnop - add8.ntr 11,%i31,%i31 ; movi8 512,%c5 - finop ; ssub8.ntr 0,%sp,%c5,%sp # fix stack - finop ; ld8 8(%sp),%i2 # load `t' as arg to - finop ; cxnop # `startup' - finop ; cxnop - finop ; ld8 16(%sp),%c10 # `startup' const block - finop ; cxnop - finop ; cxnop - finop ; ld8 0(%c10),%c4 # `startup' text loc. - finop ; cxnop - finop ; cxnop - finop ; jsr %c14,16(%c4) # call `startup' - finop ; cxnop - finop ; cxnop - movi8 1, %i0 ; movi8 0,%c8 # nargs brain dmg -# -# finop ; sadd 0,%sp,128,%sp # alter stack -# - finop ; ld8 8(%sp),%i2 # load `t' as arg to - finop ; ld8 8(%sp),%i2 # load `t' as arg to - finop ; ld8 8(%sp),%i2 # load `t' as arg to - finop ; ld8 8(%sp),%i2 # load `t' as arg to - - finop ; ld8 32(%sp),%c10 # `only' constant block - finop ; ld8 8(%sp),%i2 # `u' arg. - finop ; ld8 16(%sp),%i3 # `t' arg. - finop ; ld8 0(%c10),%c4 # `only' text location - finop ; ld8 24(%sp),%i4 # `userf' arg. - finop ; cxnop - finop ; jsr %c4,16(%c4) # call `only' - finop ; cxnop - finop ; cxnop -# -# If the callee ever calls `nargs', the following instruction (pair) -# will be executed. However, we don't know when we compile this code -# how many args are being passed. So we give our best guess: 0. -# - movi8 0,%i0 ; movi8 0,%c8 # nargs brain dmg -# -# If we ever return, it's an error. -# - finop ; jmp qt_error$TXT - finop ; cxnop - finop ; cxnop - movi8 0,%i0 ; movi8 0,%c8 # nargs brain dmg |