Add .gitignore, makefile, and cheatsheet.

Author: kohler

asm1x/.gitignore

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+arg[1-8]
+main
+mul
+*.s

asm1x/GNUmakefile

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+ASMS := $(patsubst %.c,%.s,$(wildcard *.c))
+ASM_OBJECTS := $(patsubst %.s,%.o,$(ASMS))
+ASM_PROGRAMS := $(shell grep -l main $(wildcard *.[cs]) | sed 's,\.[cs],,' | sort -u)
+DEFAULT_ASM_CFLAGS = -O1
+DEFAULT_ASM_CFLAGS_DEBUG = -g $(DEFAULT_ASM_CFLAGS)
+
+PROGRAMS = $(ASM_PROGRAMS)
+
+all: $(ASMS) $(PROGRAMS)
+
+ALLPROGRAMS = $(PROGRAMS)
+PREFER_GCC ?= 1
+
+include ../common/rules.mk
+
+%.o: %.c $(BUILDSTAMP)
+	$(call run,$(CC) $(CFLAGS) -O1 $(DEPCFLAGS) -o $@ -c,COMPILE,$<)
+
+$(ASM_OBJECTS): %.o: %.s $(BUILDSTAMP)
+	$(call run,$(CC) -o $@ -c,ASSEMBLE,$<)
+
+%.noopt.o: %.c $(BUILDSTAMP)
+	$(call run,$(CC) $(CFLAGS) -O0 $(DEPCFLAGS) -o $@ -c,COMPILE -O0,$<)
+
+%.prof.o: %.c $(BUILDSTAMP)
+	$(call run,$(CC) $(CFLAGS) -pg -O1 $(DEPCFLAGS) -o $@ -c,COMPILE -pg,$<)
+
+
+%.s: %.c GNUmakefile
+	@ARGS=$$(grep '^//!' $< | sed 's/.*! *//'); \
+	  CFLAGS="`echo "$(CFLAGS)" | sed 's/ *-g */ /'`"; \
+	  if test -z "$$ARGS"; then ARGS="$(DEFAULT_ASM_CFLAGS)"; fi; \
+	  $(call xrun,$(CC) $$CFLAGS $$ARGS -o $@ -S $<,COMPILE -S $$ARGS $<) && { $(call cleanasm,$@); }
+
+$(ASM_PROGRAMS): %: %.s
+	@ARGS=$$(grep '^//!' $< | sed 's/.*! *//'); \
+	  CFLAGS="`echo "$(CFLAGS)" | sed 's/ *-g */ /'`"; \
+	  if test -z "$$ARGS"; then ARGS="$(DEFAULT_ASM_CFLAGS)"; fi; \
+	  $(call xrun,$(CC) $$CFLAGS $$ARGS -o $@ $<,ASSEMBLE $@)
+
+
+clean:
+	$(call run,rm -f $(ALLPROGRAMS) *.o *.dSYM *.core,CLEAN)
+	$(call run,rm -rf $(DEPSDIR))
+	$(call run,for i in $(ASMS); do x=`basename -s .s $$i`; if grep main $$i $$x.c >/dev/null 2>&1; then rm -f $$x; fi; if test -r $$x.c; then rm -f $$i; fi; done)
+
+insert-f%:
+	../common/renumber.pl -i f$*
+delete-f%:
+	../common/renumber.pl -d f$*
+
+.PHONY: all clean insert-f% delete-f%
+

asm1x/cheatsheet.txt

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+CS61 x86-64 Assembly Cheat Sheat
+
+A. Registers
+A1. There are a total of <HOWMANY> general purpose (GP) registers.
+A2. There are <HOWMANY> GP registers with symbolic names.
+A3. They are: <LIST ALL THE NAMED REGISTERS>
+A4. There are <HOWMANY> GP registers with number names.
+A5. They are: <DESCRIBE/LIST ALL THE NUMBERED REGISTERS>
+A6. rip is: <DESCRIBE IT>
+A7. rsp is: <DESCRIBE IT>
+A8. rbp is: <DESCRIBE IT>
+
+B. Parameter passing
+B1. The first argument to a function is passed in register <NAME>.
+B2. The second argument to a function is passed in register <NAME>.
+B3. The third argument to a function is passed in register <NAME>.
+B4. The fourth argument to a function is passed in register <NAME>.
+B5. The fifth argument to a function is passed in register <NAME>.
+B6. The sixth argument to a function is passed in register <NAME>.
+B7. The seventh argument to a function is passed <DESCRIBE HOW>.
+
+C. Addressing modes
+C1. $N (for N a number) means:
+C2. The expression %REG (for REG a register) means:
+C3. (%REG) means:
+C4. (%REG, %REG) means:
+C5. (%REG, %REG, N) for N=1, 2, 4 or 8 means:
+C6. N(<MODE>) for addressing mode C3, C4, or C5 means:
+C7. lea<TYPE> (for TYPE one of b,w,l,q) means:
+
+D. x86 flags
+For each of the following flags, write down what it means for the flag
+to be set:
+D1. SF
+D2. CF
+D3. ZF
+D4. OF
+
+E. Instructions whose only purpose is to set flag values:
+Explain how each instruction sets the flag registers.
+E1. cmp operand1, operand2
+E2. test operand1, operand2
+
+F. Jump Instructions
+For each jump instruction below, write the expression describing when
+the jump will be taken. You will undoubtedly find it useful to
+describe this both in terms of which flags you must check but also,
+assuming that the previous operation were a cmp or test instruction,
+what relationship the operands of the previous instruction have, e.g.,
+op1 > op2, or op1 != 0, or whatever applies.
+
+F1. je
+F2. jne
+F3. js
+F4. jns
+F5. jg
+F6. jge
+F7. jl
+F8. jle
+F9. ja
+F10. jae
+F11. jb
+F12. jbe