Chapter 4: The Instruction Set Architecture - 10/31/2013 02:13:31 ...
Chapter 4: The Instruction Set Architecture - 10/31/2013 02:13:31 ...
Chapter 4: The Instruction Set Architecture - 10/31/2013 02:13:31 ...
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4-25<br />
<strong>Chapter</strong> 4: <strong>The</strong> <strong>Instruction</strong> <strong>Set</strong> <strong>Architecture</strong><br />
Subroutine Linkage – Stack<br />
• Subroutine linkage with a stack passes parameters on a stack.<br />
! Calling routine<br />
.<br />
%sp<br />
.equ %r14<br />
addcc %sp, -4, %sp<br />
st %r1, %sp<br />
addcc %sp, -4, %sp<br />
st %r2, %sp<br />
call add_3<br />
ld %sp, %r3<br />
addcc %sp, 4, %sp<br />
.<br />
! Called routine<br />
! Arguments are on stack.<br />
! %sp[0] ← %sp[0] + %sp[4]<br />
%sp<br />
add_3:<br />
.equ %r14<br />
ld %sp, %r8<br />
addcc %sp, 4, %sp<br />
ld %sp, %r9<br />
addcc<br />
st<br />
%r8, %r9, %r<strong>10</strong><br />
%r<strong>10</strong>, %sp<br />
jmpl %r15 + 4, %r0<br />
Principles of Computer <strong>Architecture</strong> by M. Murdocca and V. Heuring<br />
© 1999 M. Murdocca and V. Heuring
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