diff options
| author | Robin Getz <[email protected]> | 2009-08-17 15:23:02 +0000 |
|---|---|---|
| committer | Tom Rix <[email protected]> | 2009-10-03 09:04:06 -0500 |
| commit | ced6466ed520749ea73651b45fabeb5a3efa9c8b (patch) | |
| tree | 2763fa03f67e8bcdfc45e145213c572ce3b76ac1 /examples | |
| parent | f6e33d95dfe4b95a284d3e960eabc8b04f71b56a (diff) | |
Blackfin: change global data register from P5 to P3
Since the Blackfin ABI favors higher scratch registers by default, use the
last scratch register (P3) for global data rather than the first (P5).
This allows the compiler's register allocator to use higher number scratch
P registers, which in turn better matches the Blackfin instruction set,
which reduces the size of U-Boot by more than 1024 bytes...
Signed-off-by: Robin Getz <[email protected]>
Signed-off-by: Mike Frysinger <[email protected]>
Diffstat (limited to 'examples')
| -rw-r--r-- | examples/standalone/stubs.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/examples/standalone/stubs.c b/examples/standalone/stubs.c index a8cb9542821..339bbf9b56d 100644 --- a/examples/standalone/stubs.c +++ b/examples/standalone/stubs.c @@ -127,14 +127,14 @@ gd_t *global_data; : : "i"(offsetof(gd_t, jt)), "i"(XF_ ## x * sizeof(void *)) : "r5"); #elif defined(CONFIG_BLACKFIN) /* - * P5 holds the pointer to the global_data, P0 is a call-clobbered + * P3 holds the pointer to the global_data, P0 is a call-clobbered * register */ #define EXPORT_FUNC(x) \ asm volatile ( \ " .globl _" #x "\n_" \ #x ":\n" \ -" P0 = [P5 + %0]\n" \ +" P0 = [P3 + %0]\n" \ " P0 = [P0 + %1]\n" \ " JUMP (P0)\n" \ : : "i"(offsetof(gd_t, jt)), "i"(XF_ ## x * sizeof(void *)) : "P0"); |