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Diffstat (limited to 'ext/systemc/src/sysc/qt/md/ksr1.s')
| -rw-r--r-- | ext/systemc/src/sysc/qt/md/ksr1.s | 424 |
1 files changed, 424 insertions, 0 deletions
diff --git a/ext/systemc/src/sysc/qt/md/ksr1.s b/ext/systemc/src/sysc/qt/md/ksr1.s new file mode 100644 index 000000000..d4d51a0a6 --- /dev/null +++ b/ext/systemc/src/sysc/qt/md/ksr1.s @@ -0,0 +1,424 @@ +/* + * 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 |