neingeist/c-exercises
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test inline assembly

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This commit is contained in:
orange 2013-08-02 19:04:57 +02:00
parent f1d1727bf6
commit fcdc22b861
3 changed files with 23 additions and 2 deletions
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2
.gitignore vendored
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@ -17,3 +17,5 @@ bloom
wo-lernen wo-lernen
lua-foo lua-foo
binsearch binsearch
test-inline-assembly
test-inline-assembly.s

10
Makefile
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@ -1,8 +1,8 @@
CFLAGS=-std=c99 -Wall -g -O2 CFLAGS=-std=c99 -Wall -g -O2
INDENTOPTS=-kr --no-tabs --braces-on-func-def-line --indent-level2 INDENTOPTS=-kr --no-tabs --braces-on-func-def-line --indent-level2
TARGETS=approximate-pi linked-list mandelbrot threads circular-buffer structs ncurses-pong bit-fuckery bit-fuckery2 checkcheck multibrot bloom wo-lernen lua-foo binsearch TARGETS=approximate-pi linked-list mandelbrot threads circular-buffer structs ncurses-pong bit-fuckery bit-fuckery2 checkcheck multibrot bloom wo-lernen lua-foo binsearch test-inline-assembly
EXTRAS=mandelbrot.bmp multibrot.png EXTRAS=mandelbrot.bmp multibrot.png test-inline-assembly.s
.PHONY: all .PHONY: all
all: $(TARGETS) $(EXTRAS) all: $(TARGETS) $(EXTRAS)
@ -34,3 +34,9 @@ multibrot.png: multibrot
lua-foo: lua-foo.c lua-foo: lua-foo.c
$(CC) $(CFLAGS) -o $@ $< -llua -lm $(CC) $(CFLAGS) -o $@ $< -llua -lm
test-inline-assembly: test-inline-assembly.c
$(CC) -Wall -o $@ $<
test-inline-assembly.s: test-inline-assembly.c
$(CC) -Wall -S -o $@ $<

13
test-inline-assembly.c Normal file
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@ -0,0 +1,13 @@
#include <stdio.h>
int main() {
int i = 0xffff;
asm("movl $23, %0"
: "=r" (i) /* output */
/* : no input */
/* : no clobbered */
);
printf("i = %d\n", i);
}