Changeset 2063 for src/ASM/CPP2012-asm

Timestamp:

Jun 13, 2012, 5:05:30 PM (7 years ago)

Author:

mulligan

Message:

Minor fixes

File:

• src/ASM/CPP2012-asm/cpp-2012-asm.tex (modified) (3 diffs)

src/ASM/CPP2012-asm/cpp-2012-asm.tex

@@ -74 +74 @@
 
 The MCS-51 has a relative paucity of features compared to its more modern brethren, with the lack of any caching or pipelining features means that timing of execution is predictable, making the MCS-51 very attractive for CerCo's ends.
-Yet, as in most things, what one hand giveth the other taketh away, and the MCS-51's paucity of features---though an advantage in many respects---also quickly become a hindrance.
+Yet, as in most things, what one hand giveth the other taketh away, and the MCS-51's paucity of features---though an advantage in many respects---also quickly becomes a hindrance.
 In particular, the MCS-51 features a relatively minuscule series of memory spaces by modern standards.
 As a result our C compiler, to have any sort of hope of successfully compiling realistic programs for embedded devices, ought to produce `tight' machine code.
@@ -149 +149 @@
 However, to shrink the \texttt{LJMP} occurring at line 3 we must also shrink the \texttt{LJMP} occurring at line 5, and \emph{vice versa}.
 
-Further, consider what happens if, instead of appearing at memory address \texttt{0x100}, the instruction at line 5 instead appeared \emph{just} beyond the size of code memory, and all other memory addresses were shifted accordingly.
+Further, consider what happens if, instead of appearing at memory address \texttt{0x100}, the instruction at line 5 appeared \emph{just} beyond the size of code memory, and all other memory addresses were shifted accordingly.
 Now, in order to be able to successfully fit our program into the MCS-51's limited code memory, we are \emph{obliged} to shrink the \texttt{LJMP} occurring at line 5.
 That is, the shrinking process is not just related to the optimisation of generated machine code but also the completeness of the assembler itself.
@@ -426 +426 @@
 Next, we are able to translate \texttt{PseudoStatus} records into \texttt{Status} records using \texttt{status\_of\_pseudo\_status}.
 Translating a \texttt{PseudoStatus}'s code memory requires we expand pseudoinstructions and then assemble to obtain a trie of bytes.
-This never fails, providing that our policy is correct:
+This never fails, provided that our policy is correct:
 \begin{lstlisting}
 definition status_of_pseudo_status: