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test.c
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test.c
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/* test.c - MemTest-86 Version 3.2
*
* Released under version 2 of the Gnu Public License.
* By Chris Brady, cbrady@sgi.com
* ----------------------------------------------------
* MemTest86+ V3.00 Specific code (GPL V2.0)
* By Samuel DEMEULEMEESTER, sdemeule@memtest.org
* http://www.canardpc.com - http://www.memtest.org
*/
#include "test.h"
#include "config.h"
#include <sys/io.h>
#include "dmi.h"
#include <inttypes.h>
extern int segs, bail;
extern volatile ulong *p;
extern ulong p1, p2;
extern int test_ticks, nticks;
extern struct tseq tseq[];
extern void update_err_counts(void);
extern void print_err_counts(void);
void poll_errors();
int ecount = 0;
static inline ulong roundup(ulong value, ulong mask)
{
return (value + mask) & ~mask;
}
/*
* Memory address test, walking ones
*/
void addr_tst1()
{
int i, j, k;
volatile ulong *pt;
volatile ulong *end;
ulong bad, mask, bank;
/* Test the global address bits */
for (p1=0, j=0; j<2; j++) {
hprint(LINE_PAT, COL_PAT, p1);
/* Set pattern in our lowest multiple of 0x20000 */
p = (ulong *)roundup((ulong)v->map[0].start, 0x1ffff);
*p = p1;
/* Now write pattern compliment */
p1 = ~p1;
end = v->map[segs-1].end;
for (i=0; i<100; i++) {
mask = 4;
do {
pt = (ulong *)((ulong)p | mask);
if ((uintptr_t)pt == (uintptr_t)p) {
mask = mask << 1;
continue;
}
if ((uintptr_t)pt >= (uintptr_t)end) {
break;
}
*pt = p1;
if ((uintptr_t)(bad = *p) != (uintptr_t)~p1) {
ad_err1((ulong *)p, (ulong *)mask,
bad, ~p1);
i = 1000;
}
mask = mask << 1;
} while(mask);
}
do_tick();
BAILR
}
/* Now check the address bits in each bank */
/* If we have more than 8mb of memory then the bank size must be */
/* bigger than 256k. If so use 1mb for the bank size. */
if (v->pmap[v->msegs - 1].end > (0x800000 >> 12)) {
bank = 0x100000;
} else {
bank = 0x40000;
}
for (p1=0, k=0; k<2; k++) {
hprint(LINE_PAT, COL_PAT, p1);
for (j=0; j<segs; j++) {
p = v->map[j].start;
/* Force start address to be a multiple of 256k */
p = (ulong *)roundup((ulong)p, bank - 1);
end = v->map[j].end;
while ((uintptr_t)p < (uintptr_t)end) {
*p = p1;
p1 = ~p1;
for (i=0; i<200; i++) {
mask = 4;
do {
pt = (ulong *)
((ulong)p | mask);
if ((uintptr_t)pt == (uintptr_t)p) {
mask = mask << 1;
continue;
}
if ((uintptr_t)pt >= (uintptr_t)end) {
break;
}
*pt = p1;
if ((uintptr_t)(bad = *p) != (uintptr_t)~p1) {
ad_err1((ulong *)p,
(ulong *)mask,
bad,~p1);
i = 200;
}
mask = mask << 1;
} while(mask);
}
if ((uintptr_t)(p + bank/4) > (uintptr_t)p) {
p += bank/4;
} else {
p = end;
}
p1 = ~p1;
}
}
do_tick();
BAILR
p1 = ~p1;
}
}
/*
* Memory address test, own address
*/
void addr_tst2()
{
int j, done;
volatile ulong *pe;
volatile ulong *end, *start;
cprint(LINE_PAT, COL_PAT, " ");
/* Write each address with it's own address */
for (j=0; j<segs; j++) {
start = v->map[j].start;
end = v->map[j].end;
pe = (ulong *)start;
p = start;
done = 0;
do {
/* Check for overflow */
if ((uintptr_t)(pe + SPINSZ) > (uintptr_t)pe) {
pe += SPINSZ;
} else {
pe = end;
}
if ((uintptr_t)pe >= (uintptr_t)end) {
pe = end;
done++;
}
if ((uintptr_t)p == (uintptr_t)pe) {
break;
}
/* Original C code replaced with hand tuned assembly code
* for (; p < pe; p++) {
* *p = (ulong)p;
* }
*/
asm __volatile__ (
"jmp L90\n\t"
".p2align 4,,7\n\t"
"L90:\n\t"
"movl %%edi,(%%edi)\n\t"
"addl $4,%%edi\n\t"
"cmpl %%edx,%%edi\n\t"
"jb L90\n\t"
: "=D" (p)
: "D" (p), "d" (pe)
);
do_tick();
BAILR
} while (!done);
}
/* Each address should have its own address */
for (j=0; j<segs; j++) {
start = v->map[j].start;
end = v->map[j].end;
pe = (ulong *)start;
p = start;
done = 0;
do {
/* Check for overflow */
if ((uintptr_t)(pe + SPINSZ) > (uintptr_t)pe) {
pe += SPINSZ;
} else {
pe = end;
}
if ((uintptr_t)pe >= (uintptr_t)end) {
pe = end;
done++;
}
if ((uintptr_t)p == (uintptr_t)pe ) {
break;
}
/* Original C code replaced with hand tuned assembly code
* for (; p < pe; p++) {
* if((bad = *p) != (ulong)p) {
* ad_err2((ulong)p, bad);
* }
* }
*/
asm __volatile__ (
"jmp L91\n\t"
".p2align 4,,7\n\t"
"L91:\n\t"
"movl (%%edi),%%ecx\n\t"
"cmpl %%edi,%%ecx\n\t"
"jne L93\n\t"
"L92:\n\t"
"addl $4,%%edi\n\t"
"cmpl %%edx,%%edi\n\t"
"jb L91\n\t"
"jmp L94\n\t"
"L93:\n\t"
"pushl %%edx\n\t"
"pushl %%ecx\n\t"
"pushl %%edi\n\t"
"call ad_err2\n\t"
"popl %%edi\n\t"
"popl %%ecx\n\t"
"popl %%edx\n\t"
"jmp L92\n\t"
"L94:\n\t"
: "=D" (p)
: "D" (p), "d" (pe)
: "ecx"
);
do_tick();
BAILR
} while (!done);
}
}
/*
* Test all of memory using a "half moving inversions" algorithm using random
* numbers and their complment as the data pattern. Since we are not able to
* produce random numbers in reverse order testing is only done in the forward
* direction.
*/
void movinvr()
{
int i, j, done, seed1, seed2;
volatile ulong *pe;
volatile ulong *start,*end;
ulong num;
uintptr_t seg_start;
/* Initialize memory with initial sequence of random numbers. */
if (v->rdtsc) {
asm __volatile__ ("rdtsc":"=a" (seed1),"=d" (seed2));
} else {
seed1 = 521288629 + v->pass;
seed2 = 362436069 - v->pass;
}
/* Display the current seed */
hprint(LINE_PAT, COL_PAT, seed1);
rand_seed(seed1, seed2);
for (j=0; j<segs; j++) {
start = v->map[j].start;
end = v->map[j].end;
pe = start;
p = start;
seg_start = (uintptr_t)p;
done = 0;
do {
/* Check for overflow */
if ((uintptr_t)(pe + SPINSZ) > (uintptr_t)pe) {
pe += SPINSZ;
} else {
pe = end;
}
if ((uintptr_t)pe >= (uintptr_t)end) {
pe = end;
done++;
}
if (seg_start == (uintptr_t)pe) {
break;
}
/* Original C code replaced with hand tuned assembly code */
/*
for (; p < pe; p++) {
*p = rand();
}
*/
asm __volatile__ (
"jmp L200\n\t"
".p2align 4,,7\n\t"
"L200:\n\t"
"call rand\n\t"
"movl %%eax,(%%edi)\n\t"
"addl $4,%%edi\n\t"
"cmpl %%ebx,%%edi\n\t"
"jb L200\n\t"
: "=D" (p)
: "D" (p), "b" (pe)
: "eax", "edx"
);
do_tick();
BAILR
} while (!done);
}
/* Do moving inversions test. Check for initial pattern and then
* write the complement for each memory location. Test from bottom
* up and then from the top down. */
for (i=0; i<2; i++) {
rand_seed(seed1, seed2);
for (j=0; j<segs; j++) {
start = v->map[j].start;
end = v->map[j].end;
pe = start;
p = start;
seg_start = (uintptr_t)p;
done = 0;
do {
/* Check for overflow */
if ((uintptr_t)(pe + SPINSZ) > (uintptr_t)pe) {
pe += SPINSZ;
} else {
pe = end;
}
if ((uintptr_t)pe >= (uintptr_t)end) {
pe = end;
done++;
}
if (seg_start == (uintptr_t)pe) {
break;
}
/* Original C code replaced with hand tuned assembly code */
/*
for (; p < pe; p++) {
num = rand();
if (i) {
num = ~num;
}
if ((bad=*p) != num) {
error((ulong*)p, num, bad);
}
*p = ~num;
}
*/
if (i) {
num = 0xffffffff;
} else {
num = 0;
}
asm __volatile__ (
"jmp L26\n\t" \
".p2align 4,,7\n\t" \
"L26:\n\t" \
"call rand\n\t"
"xorl %%ebx,%%eax\n\t" \
"movl (%%edi),%%ecx\n\t" \
"cmpl %%eax,%%ecx\n\t" \
"jne L23\n\t" \
"L25:\n\t" \
"movl $0xffffffff,%%edx\n\t" \
"xorl %%edx,%%eax\n\t" \
"movl %%eax,(%%edi)\n\t" \
"addl $4,%%edi\n\t" \
"cmpl %%esi,%%edi\n\t" \
"jb L26\n\t" \
"jmp L24\n" \
"L23:\n\t" \
"pushl %%esi\n\t" \
"pushl %%ecx\n\t" \
"pushl %%eax\n\t" \
"pushl %%edi\n\t" \
"call error\n\t" \
"popl %%edi\n\t" \
"popl %%eax\n\t" \
"popl %%ecx\n\t" \
"popl %%esi\n\t" \
"jmp L25\n" \
"L24:\n\t" \
: "=D" (p)
: "D" (p), "S" (pe), "b" (num)
: "eax", "ecx", "edx"
);
do_tick();
BAILR
} while (!done);
}
}
}
/*
* Test all of memory using a "moving inversions" algorithm using the
* pattern in p1 and it's complement in p2.
*/
void movinv1(int iter, ulong p1, ulong p2)
{
int i, j, done;
volatile ulong *pe;
volatile ulong len;
volatile ulong *start,*end;
/* Display the current pattern */
hprint(LINE_PAT, COL_PAT, p1);
/* Initialize memory with the initial pattern. */
for (j=0; j<segs; j++) {
start = v->map[j].start;
end = v->map[j].end;
pe = start;
p = start;
done = 0;
do {
/* Check for overflow */
if ((uintptr_t)(pe + SPINSZ) > (uintptr_t)pe) {
pe += SPINSZ;
} else {
pe = end;
}
if ((uintptr_t)pe >= (uintptr_t)end) {
pe = end;
done++;
}
len = pe - p;
if ((uintptr_t)p == (uintptr_t)pe) {
break;
}
/* Original C code replaced with hand tuned assembly code
* for (; p < pe; p++) {
* *p = p1;
* }
*/
asm __volatile__ (
"rep\n\t" \
"stosl\n\t"
: "=D" (p)
: "c" (len), "0" (p), "a" (p1)
);
do_tick();
BAILR
} while (!done);
}
/* Do moving inversions test. Check for initial pattern and then
* write the complement for each memory location. Test from bottom
* up and then from the top down. */
for (i=0; i<iter; i++) {
for (j=0; j<segs; j++) {
start = v->map[j].start;
end = v->map[j].end;
pe = start;
p = start;
done = 0;
do {
/* Check for overflow */
if ((uintptr_t)(pe + SPINSZ) > (uintptr_t)pe) {
pe += SPINSZ;
} else {
pe = end;
}
if ((uintptr_t)pe >= (uintptr_t)end) {
pe = end;
done++;
}
if ((uintptr_t)p == (uintptr_t)pe) {
break;
}
/* Original C code replaced with hand tuned assembly code
* for (; p < pe; p++) {
* if ((bad=*p) != p1) {
* error((ulong*)p, p1, bad);
* }
* *p = p2;
* }
*/
asm __volatile__ (
"jmp L2\n\t" \
".p2align 4,,7\n\t" \
"L2:\n\t" \
"movl (%%edi),%%ecx\n\t" \
"cmpl %%eax,%%ecx\n\t" \
"jne L3\n\t" \
"L5:\n\t" \
"movl %%ebx,(%%edi)\n\t" \
"addl $4,%%edi\n\t" \
"cmpl %%edx,%%edi\n\t" \
"jb L2\n\t" \
"jmp L4\n" \
"L3:\n\t" \
"pushl %%edx\n\t" \
"pushl %%ebx\n\t" \
"pushl %%ecx\n\t" \
"pushl %%eax\n\t" \
"pushl %%edi\n\t" \
"call error\n\t" \
"popl %%edi\n\t" \
"popl %%eax\n\t" \
"popl %%ecx\n\t" \
"popl %%ebx\n\t" \
"popl %%edx\n\t" \
"jmp L5\n" \
"L4:\n\t" \
: "=D" (p)
: "a" (p1), "0" (p), "d" (pe), "b" (p2)
: "ecx"
);
do_tick();
BAILR
} while (!done);
}
for (j=segs-1; j>=0; j--) {
start = v->map[j].start;
end = v->map[j].end;
pe = end -1;
p = end -1;
done = 0;
do {
/* Check for underflow */
if ((uintptr_t)(pe - SPINSZ) < (uintptr_t)pe) {
pe -= SPINSZ;
} else {
pe = start;
}
if ((uintptr_t)pe <= (uintptr_t)start) {
pe = start;
done++;
}
if ((uintptr_t)p == (uintptr_t)pe) {
break;
}
/* Original C code replaced with hand tuned assembly code
* do {
* if ((bad=*p) != p2) {
* error((ulong*)p, p2, bad);
* }
* *p = p1;
* } while (p-- > pe);
*/
asm __volatile__ (
"addl $4, %%edi\n\t"
"jmp L9\n\t"
".p2align 4,,7\n\t"
"L9:\n\t"
"subl $4, %%edi\n\t"
"movl (%%edi),%%ecx\n\t"
"cmpl %%ebx,%%ecx\n\t"
"jne L6\n\t"
"L10:\n\t"
"movl %%eax,(%%edi)\n\t"
"cmpl %%edi, %%edx\n\t"
"jne L9\n\t"
"subl $4, %%edi\n\t"
"jmp L7\n\t"
"L6:\n\t"
"pushl %%edx\n\t"
"pushl %%eax\n\t"
"pushl %%ecx\n\t"
"pushl %%ebx\n\t"
"pushl %%edi\n\t"
"call error\n\t"
"popl %%edi\n\t"
"popl %%ebx\n\t"
"popl %%ecx\n\t"
"popl %%eax\n\t"
"popl %%edx\n\t"
"jmp L10\n"
"L7:\n\t"
: "=D" (p)
: "a" (p1), "0" (p), "d" (pe), "b" (p2)
: "ecx"
);
do_tick();
BAILR
} while (!done);
}
}
}
void movinv32(int iter, ulong p1, ulong lb, ulong hb, int sval, int off)
{
int i, j, k=0, done;
volatile ulong *pe;
volatile ulong *start, *end;
ulong pat = 0;
/* CDH start
* ulong p3 = sval << 31;
* CDH end
*/
/* Display the current pattern */
hprint(LINE_PAT, COL_PAT, p1);
/* Initialize memory with the initial pattern. */
for (j=0; j<segs; j++) {
start = v->map[j].start;
end = v->map[j].end;
pe = start;
p = start;
done = 0;
k = off;
pat = p1;
do {
/* Check for overflow */
if ((uintptr_t)(pe + SPINSZ) > (uintptr_t)pe) {
pe += SPINSZ;
} else {
pe = end;
}
if ((uintptr_t)pe >= (uintptr_t)end) {
pe = end;
done++;
}
if ((uintptr_t)p == (uintptr_t)pe) {
break;
}
/* Do a SPINSZ section of memory */
/* Original C code replaced with hand tuned assembly code
* while (p < pe) {
* *p = pat;
* if (++k >= 32) {
* pat = lb;
* k = 0;
* } else {
* pat = pat << 1;
* pat |= sval;
* }
* p++;
* }
*/
asm __volatile__ (
"jmp L20\n\t"
".p2align 4,,7\n\t"
/* CDH start */
"L20:\n\t"
"movl %%ecx,(%%edi)\n\t"
"incb %%bl\n\t"
"addl $4,%%edi\n\t"
"roll $1,%%ecx\n\t"
"cmpl %%edx,%%edi\n\t"
"jb L20\n\t"
"andb $31,%%bl\n\t"
: "=b" (k), "=D" (p), "=c" (pat)
: "D" (p),"d" (pe),"b" (k),"c" (pat)
/* CDH end */
);
do_tick();
BAILR
} while (!done);
}
/* Do moving inversions test. Check for initial pattern and then
* write the complement for each memory location. Test from bottom
* up and then from the top down. */
for (i=0; i<iter; i++) {
for (j=0; j<segs; j++) {
start = v->map[j].start;
end = v->map[j].end;
pe = start;
p = start;
done = 0;
k = off;
pat = p1;
do {
/* Check for overflow */
if ((uintptr_t)(pe + SPINSZ) > (uintptr_t)pe) {
pe += SPINSZ;
} else {
pe = end;
}
if ((uintptr_t)pe >= (uintptr_t)end) {
pe = end;
done++;
}
if ((uintptr_t)p == (uintptr_t)pe) {
break;
}
/* Original C code replaced with hand tuned assembly code
* while (p < pe) {
* if ((bad=*p) != pat) {
* error((ulong*)p, pat, bad);
* }
* *p = ~pat;
* if (++k >= 32) {
* pat = lb;
* k = 0;
* } else {
* pat = pat << 1;
* pat |= sval;
* }
* p++;
* }
*/
asm __volatile__ (
"pushl %%ebp\n\t"
"jmp L30\n\t"
".p2align 4,,7\n\t"
"L30:\n\t"
"movl (%%edi),%%ebp\n\t"
"cmpl %%ecx,%%ebp\n\t"
"jne L34\n\t"
/* CDH start */
"L35:\n\t"
"notl %%ecx\n\t"
"movl %%ecx,(%%edi)\n\t"
"notl %%ecx\n\t"
"addl $4,%%edi\n\t"
"incb %%bl\n\t"
"roll $1,%%ecx\n\t"
"cmpl %%edx,%%edi\n\t"
"jb L30\n\t"
"jmp L33\n\t"
/* CDH end */
"L34:\n\t" \
"pushl %%esi\n\t"
"pushl %%eax\n\t"
"pushl %%ebx\n\t"
"pushl %%edx\n\t"
"pushl %%ebp\n\t"
"pushl %%ecx\n\t"
"pushl %%edi\n\t"
"call error\n\t"
"popl %%edi\n\t"
"popl %%ecx\n\t"
"popl %%ebp\n\t"
"popl %%edx\n\t"
"popl %%ebx\n\t"
"popl %%eax\n\t"
"popl %%esi\n\t"
"jmp L35\n"
/* CDH start */
"L33:\n\t"
"andb $31,%%bl\n\t"
"popl %%ebp\n\t"
: "=b" (k), "=D" (p), "=c" (pat)
: "D" (p),"d" (pe),"b" (k),"c" (pat)
/* CDH end */
);
do_tick();
BAILR
} while (!done);
}
/* Since we already adjusted k and the pattern this
* code backs both up one step
*/
/* CDH start */
/* Original C code replaced with hand tuned assembly code
* pat = lb;
* if ( 0 != (k = (k-1) & 31) ) {
* pat = (pat << k);
* if ( sval )
* pat |= ((sval << k) - 1);
* }
* k++;
*/
asm __volatile__ (
"decl %%ecx\n\t"
"andl $31,%%ecx\n\t"
"roll %%cl,%%ebx\n\t"
"incb %%cl\n\t"
: "=c" (k), "=b" (pat)
: "c" (k), "b" (lb)
);
/* CDH end */
for (j=segs-1; j>=0; j--) {
start = v->map[j].start;
end = v->map[j].end;
p = end -1;
pe = end -1;
done = 0;
do {
/* Check for underflow */
if ((uintptr_t)(pe - SPINSZ) < (uintptr_t)pe) {
pe -= SPINSZ;
} else {
pe = start;
}
if ((uintptr_t)pe <= (uintptr_t)start) {
pe = start;
done++;
}
if ((uintptr_t)p == (uintptr_t)pe) {
break;
}
/* Original C code replaced with hand tuned assembly code
* do {
* if ((bad=*p) != ~pat) {
* error((ulong*)p, ~pat, bad);
* }
* *p = pat;
* if (--k <= 0) {
* pat = hb;
* k = 32;
* } else {
* pat = pat >> 1;
* pat |= p3;
* }
* } while (p-- > pe);
*/
asm __volatile__ (
"pushl %%ebp\n\t"
"addl $4,%%edi\n\t"
"jmp L40\n\t"
".p2align 4,,7\n\t"
"L40:\n\t"
"subl $4,%%edi\n\t"
"movl (%%edi),%%ebp\n\t"
"notl %%ecx\n\t"
"cmpl %%ecx,%%ebp\n\t"
"jne L44\n\t"
/* CDH start */
"L45:\n\t"
"notl %%ecx\n\t"
"movl %%ecx,(%%edi)\n\t"
"decb %%bl\n\t"
"rorl $1,%%ecx\n\t"
"cmpl %%edx,%%edi\n\t"
"ja L40\n\t"
"jmp L43\n\t"
/* CDH end */
"L44:\n\t" \
"pushl %%esi\n\t"
"pushl %%eax\n\t"
"pushl %%ebx\n\t"
"pushl %%edx\n\t"
"pushl %%ebp\n\t"
"pushl %%ecx\n\t"
"pushl %%edi\n\t"
"call error\n\t"
"popl %%edi\n\t"
"popl %%ecx\n\t"
"popl %%ebp\n\t"
"popl %%edx\n\t"
"popl %%ebx\n\t"
"popl %%eax\n\t"
"popl %%esi\n\t"
"jmp L45\n"
/* CDH start */
"L43:\n\t"
"andb $31,%%bl\n\t"
"subl $4,%%edi\n\t"
"popl %%ebp\n\t"
: "=b" (k), "=D" (p), "=c" (pat)
: "D" (p),"d" (pe),"b" (k),"c" (pat)
/* CDH end */
);
do_tick();
BAILR
} while (!done);
}
}
}
/*
* Test all of memory using modulo X access pattern.
*/
void modtst(int offset, int iter, ulong p1, ulong p2)
{
int j, k, l, done;
volatile ulong *pe;
volatile ulong *start, *end;
/* Display the current pattern */
hprint(LINE_PAT, COL_PAT-2, p1);
cprint(LINE_PAT, COL_PAT+6, "-");
dprint(LINE_PAT, COL_PAT+7, offset, 2, 1);
/* Write every nth location with pattern */
for (j=0; j<segs; j++) {
start = v->map[j].start;
end = v->map[j].end;
pe = (ulong *)start;
p = start+offset;
done = 0;
do {
/* Check for overflow */
if ((uintptr_t)(pe + SPINSZ) > (uintptr_t)pe) {
pe += SPINSZ;
} else {
pe = end;
}
if ((uintptr_t)pe >= (uintptr_t)end) {
pe = end;
done++;
}
if ((uintptr_t)p == (uintptr_t)pe) {
break;
}
/* Original C code replaced with hand tuned assembly code
* for (; p < pe; p += MOD_SZ) {
* *p = p1;
* }
*/
asm __volatile__ (
"jmp L60\n\t" \
".p2align 4,,7\n\t" \
"L60:\n\t" \
"movl %%eax,(%%edi)\n\t" \
"addl $80,%%edi\n\t" \
"cmpl %%edx,%%edi\n\t" \
"jb L60\n\t" \
: "=D" (p)
: "D" (p), "d" (pe), "a" (p1)
);
do_tick();
BAILR
} while (!done);
}
/* Write the rest of memory "iter" times with the pattern complement */
for (l=0; l<iter; l++) {
for (j=0; j<segs; j++) {
start = v->map[j].start;
end = v->map[j].end;
pe = (ulong *)start;
p = start;
done = 0;
k = 0;
do {
/* Check for overflow */
if ((uintptr_t)(pe + SPINSZ) > (uintptr_t)pe) {
pe += SPINSZ;
} else {
pe = end;
}
if ((uintptr_t)pe >= (uintptr_t)end) {
pe = end;
done++;
}
if ((uintptr_t)p == (uintptr_t)pe) {
break;
}
/* Original C code replaced with hand tuned assembly code
* for (; p < pe; p++) {
* if (k != offset) {
* *p = p2;
* }
* if (++k > MOD_SZ-1) {
* k = 0;
* }
* }
*/
asm __volatile__ (
"jmp L50\n\t" \
".p2align 4,,7\n\t" \
"L50:\n\t" \
"cmpl %%ebx,%%ecx\n\t" \
"je L52\n\t" \
"movl %%eax,(%%edi)\n\t" \
"L52:\n\t" \
"incl %%ebx\n\t" \
"cmpl $19,%%ebx\n\t" \
"jle L53\n\t" \
"xorl %%ebx,%%ebx\n\t" \
"L53:\n\t" \
"addl $4,%%edi\n\t" \
"cmpl %%edx,%%edi\n\t" \
"jb L50\n\t" \
: "=D" (p), "=b" (k)
: "D" (p), "d" (pe), "a" (p2),
"b" (k), "c" (offset)
);