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1. Learn sparc asm 2. Realize the level of bogosity of the existing asm 3. Fix it 4. Profit!

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Original commit message from CVS:
1. Learn sparc asm
2. Realize the level of bogosity of the existing asm
3. Fix it
4. Profit!
This commit is contained in:
David Schleef 2003-07-29 22:24:39 +00:00
parent 3770896368
commit e3ce6294e6
1 changed files with 22 additions and 18 deletions
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40
gst/gstatomic_impl.h
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@ -249,32 +249,34 @@ GST_INLINE_FUNC void
gst_atomic_int_add (GstAtomicInt *aint, gint val)
{
volatile int increment, *ptr;
char lock;
int lock = 1;
int ignore = 0;
ptr = &(aint->counter);
#if __GNUC__ > 3 || (__GNUC__ >=3 && __GNUC_MINOR__ >= 2)
__asm__ __volatile__("1: ldstub [%[ptr] + 3], %[lock]\n"
"\torcc %[lock], 0, %%g0\n"
"\torcc %[lock], 0, %[ignore]\n"
"\tbne 1b\n" /* go back until we have the lock */
"\tld [%[ptr]], %[inc]\n"
"\tsra %[inc], 8, %[inc]\n"
"\tadd %[inc], %[val], %[inc]\n"
"\tsll %[inc], 8, %[lock]\n"
"\tst %[lock],[%[ptr]]\n" /* Release the lock */
: [inc] "=&r" (increment), [lock] "=r" (lock)
: [inc] "=&r" (increment), [lock] "=r" (lock),
[ignore] "=&r" (ignore)
: "0" (increment), [ptr] "r" (ptr), [val] "r" (val)
);
#else
__asm__ __volatile__("1: ldstub [%3 + 3], %1\n"
"\torcc %1, 0, %%g0\n"
__asm__ __volatile__("1: ldstub [%4 + 3], %1\n"
"\torcc %1, 0, %2\n"
"\tbne 1b\n" /* go back until we have the lock */
"\tld [%3], %0\n"
"\tld [%4], %0\n"
"\tsra %0, 8, %0\n"
"\tadd %0, %4, %0\n"
"\tadd %0, %5, %0\n"
"\tsll %0, 8, %1\n"
"\tst %1,[%3]\n" /* Release the lock */
: "=&r" (increment), "=r" (lock)
"\tst %1,[%4]\n" /* Release the lock */
: "=&r" (increment), "=r" (lock), "=&r" (ignore)
: "0" (increment), "r" (ptr), "r" (val)
);
#endif
@ -290,32 +292,34 @@ GST_INLINE_FUNC gboolean
gst_atomic_int_dec_and_test (GstAtomicInt *aint)
{
volatile int increment, *ptr;
char lock;
int lock = 1;
int ignore = 0;
ptr = &aint->counter;
#if __GNUC__ > 3 || (__GNUC__ >=3 && __GNUC_MINOR__ >= 2)
#if 0 __GNUC__ > 3 || (__GNUC__ >=3 && __GNUC_MINOR__ >= 2)
__asm__ __volatile__("1: ldstub [%[ptr] + 3], %[lock]\n"
"\torcc %[lock], 0, %%g0\n"
"\torcc %[lock], 0, %[ignore]\n"
"\tbne 1b\n" /* go back until we have the lock */
"\tld [%[ptr]], %[inc]\n"
"\tsra %[inc], 8, %[inc]\n"
"\tsub %[inc], 1, %[inc]\n"
"\tsll %[inc], 8, %[lock]\n"
"\tst %[lock],[%[ptr]]\n" /* Release the lock */
: [inc] "=&r" (increment), [lock] "=r" (lock)
: [inc] "=&r" (increment), [lock] "=r" (lock),
[ignore] "=&r" (ignore)
: "0" (increment), [ptr] "r" (ptr)
);
#else
__asm__ __volatile__("1: ldstub [%3 + 3], %1\n"
"\torcc %1, 0, %%g0\n"
__asm__ __volatile__("1: ldstub [%4 + 3], %1\n"
"\torcc %1, 0, %2\n"
"\tbne 1b\n" /* go back until we have the lock */
"\tld [%3], %0\n"
"\tld [%4], %0\n"
"\tsra %0, 8, %0\n"
"\tsub %0, 1, %0\n"
"\tsll %0, 8, %1\n"
"\tst %1,[%3]\n" /* Release the lock */
: "=&r" (increment), "=r" (lock)
"\tst %1,[%4]\n" /* Release the lock */
: "=&r" (increment), "=r" (lock), "=&r" (ignore)
: "0" (increment), "r" (ptr)
);
#endif