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Make fixes, improvements, and chibicc python bindings

Browse source 
- python now mixes audio 10x faster
- python octal notation is restored
- chibicc now builds code 3x faster
- chibicc now has help documentation
- chibicc can now generate basic python bindings
- linenoise now supports some paredit-like features

See #141
This commit is contained in:
Justine Tunney 2021-10-08 08:11:51 -07:00
parent 28997f3acb
commit 7061c79c22
121 changed files with 5272 additions and 1928 deletions
Download patch file Download diff file Expand all files Collapse all files

92
libc/intrin/memmove.c
View file

@ -89,8 +89,8 @@ asm("memcpy = memmove\n\t"
* @asyncsignalsafe
*/
void *memmove(void *dst, const void *src, size_t n) {
char *d;
size_t i;
char *d, *r;
const char *s;
uint64_t a, b;
xmm_t v, w, x, y, V, W, X, Y, wut;
@ -119,18 +119,22 @@ void *memmove(void *dst, const void *src, size_t n) {
} else if (n) {
*d = *s;
}
} else if (d <= s) {
asm("rep movsb"
: "+D"(d), "+S"(s), "+c"(n), "=m"(*(char(*)[n])dst)
: "m"(*(char(*)[n])src));
} else {
d += n - 1;
s += n - 1;
asm("std\n\t"
"rep movsb\n\t"
"cld"
: "+D"(d), "+S"(s), "+c"(n), "=m"(*(char(*)[n])dst)
: "m"(*(char(*)[n])src));
if (IsAsan()) __asan_check(d, n);
if (IsAsan()) __asan_check(s, n);
if (d <= s) {
asm("rep movsb"
: "+D"(d), "+S"(s), "+c"(n), "=m"(*(char(*)[n])dst)
: "m"(*(char(*)[n])src));
} else {
d += n - 1;
s += n - 1;
asm("std\n\t"
"rep movsb\n\t"
"cld"
: "+D"(d), "+S"(s), "+c"(n), "=m"(*(char(*)[n])dst)
: "m"(*(char(*)[n])src));
}
}
return dst;
}
@ -208,7 +212,6 @@ void *memmove(void *dst, const void *src, size_t n) {
*(xmm_t *)(d + n - 16) = Y;
return d;
default:
r = d;
if (d == s) return d;
if (n < kHalfCache3 || !kHalfCache3) {
if (d > s) {
@ -221,12 +224,14 @@ void *memmove(void *dst, const void *src, size_t n) {
*(xmm_t *)(d + n + 16) = w;
} while (n >= 32);
} else {
if (IsAsan()) __asan_check(d, n);
if (IsAsan()) __asan_check(s, n);
asm("std\n\t"
"rep movsb\n\t"
"cld"
: "=D"(d), "=S"(s), "+c"(n), "=m"(*(char(*)[n])d)
: "0"(d + n - 1), "1"(s + n - 1), "m"(*(char(*)[n])s));
return r;
return dst;
}
} else {
if (IsAsan() || n < 900 || !X86_HAVE(ERMS)) {
@ -241,10 +246,12 @@ void *memmove(void *dst, const void *src, size_t n) {
s += i;
n -= i;
} else {
if (IsAsan()) __asan_check(d, n);
if (IsAsan()) __asan_check(s, n);
asm("rep movsb"
: "+D"(d), "+S"(s), "+c"(n), "=m"(*(char(*)[n])d)
: "m"(*(char(*)[n])s));
return r;
return dst;
}
}
} else {
@ -278,54 +285,31 @@ void *memmove(void *dst, const void *src, size_t n) {
}
asm("sfence");
}
switch (n) {
case 0:
return r;
case 17 ... 31:
__builtin_memcpy(&v, s, 16);
__builtin_memcpy(&w, s + n - 16, 16);
__builtin_memcpy(d, &v, 16);
__builtin_memcpy(d + n - 16, &w, 16);
return r;
case 9 ... 15:
if (n) {
if (n >= 16) {
v = *(const xmm_t *)s;
w = *(const xmm_t *)(s + n - 16);
*(xmm_t *)d = v;
*(xmm_t *)(d + n - 16) = w;
} else if (n >= 8) {
__builtin_memcpy(&a, s, 8);
__builtin_memcpy(&b, s + n - 8, 8);
__builtin_memcpy(d, &a, 8);
__builtin_memcpy(d + n - 8, &b, 8);
return r;
case 5 ... 7:
} else if (n >= 4) {
__builtin_memcpy(&a, s, 4);
__builtin_memcpy(&b, s + n - 4, 4);
__builtin_memcpy(d, &a, 4);
__builtin_memcpy(d + n - 4, &b, 4);
return r;
case 16:
__builtin_memcpy(&v, s, 16);
__builtin_memcpy(d, &v, 16);
return r;
case 8:
__builtin_memcpy(&a, s, 8);
__builtin_memcpy(d, &a, 8);
return r;
case 4:
__builtin_memcpy(&a, s, 4);
__builtin_memcpy(d, &a, 4);
return r;
case 1:
} else if (n >= 2) {
__builtin_memcpy(&a, s, 2);
__builtin_memcpy(&b, s + n - 2, 2);
__builtin_memcpy(d, &a, 2);
__builtin_memcpy(d + n - 2, &b, 2);
} else {
*d = *s;
return r;
case 2:
__builtin_memcpy(&a, s, 2);
__builtin_memcpy(d, &a, 2);
return r;
case 3:
__builtin_memcpy(&a, s, 2);
__builtin_memcpy(&b, s + 1, 2);
__builtin_memcpy(d, &a, 2);
__builtin_memcpy(d + 1, &b, 2);
return r;
default:
unreachable;
}
}
return dst;
}
}