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Add The LISP Challenge

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This change introduces a 2.5kb program that's comes pretty close so far
to bootstrapping John McCarthy's metacircular evaluator on bare metal.
This commit is contained in:
Justine Tunney 2020-10-01 01:20:13 -07:00
parent fd22e55b42
commit b6793d42d5
34 changed files with 1056 additions and 358 deletions
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2
libc/log/asan.c
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@ -238,7 +238,7 @@ static void __asan_deallocate(char *p, int kind) {
if ((*s < 0 && *s != kAsanHeapOverrun) || *s >= 8) {
__asan_report_deallocate_fault(p, *s);
}
for (; *s >= 0; ++s) *s = kind;
memset(s, kind, dlmalloc_usable_size(p) >> 3);
dlfree(__asan_morgue_add(p));
}

2
libc/runtime/runtime.mk
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@ -69,8 +69,6 @@ o/$(MODE)/libc/runtime/winmain.greg.o: \
DEFAULT_CPPFLAGS += \
-DSTACK_FRAME_UNLIMITED
o/$(MODE)/libc/runtime/main-gcc.asm: OVERRIDE_CFLAGS += -ffixed-r12 -ffixed-r13 -ffixed-r14 -ffixed-r15
LIBC_RUNTIME_LIBS = $(foreach x,$(LIBC_RUNTIME_ARTIFACTS),$($(x)))
LIBC_RUNTIME_SRCS = $(foreach x,$(LIBC_RUNTIME_ARTIFACTS),$($(x)_SRCS))
LIBC_RUNTIME_HDRS = $(foreach x,$(LIBC_RUNTIME_ARTIFACTS),$($(x)_HDRS))

4
libc/str/thompike.h
View file

@ -3,6 +3,8 @@
#include "libc/nexgen32e/bsr.h"
#define ThomPikeCont(x) ((x & 0b11000000) == 0b10000000)
#define ThomPikeByte(x) (x & (((1 << (x < 252 ? bsr(~x & 0xff) : 1)) - 1) | 3))
#define ThomPikeByte(x) (x & (((1 << ThomPikeMsb(x)) - 1) | 3))
#define ThomPikeLen(x) (7 - ThomPikeMsb(x))
#define ThomPikeMsb(x) (x < 252 ? bsr(~x & 0xff) : 1)
#endif /* COSMOPOLITAN_LIBC_STR_THOMPIKE_H_ */