reworked memset,memcpy of the cris kernel, this improves board speed by factor 20
SVN-Revision: 7478
This commit is contained in:
parent
80b89723d2
commit
7b071f1bfc
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@ -1,100 +1,10 @@
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diff -urN linux-2.6.19.2.orig/arch/cris/arch-v10/lib/memset.c linux-2.6.19.2/arch/cris/arch-v10/lib/memset.c
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--- linux-2.6.19.2.orig/arch/cris/arch-v10/lib/memset.c 2007-05-20 01:46:35.000000000 +0200
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+++ linux-2.6.19.2/arch/cris/arch-v10/lib/memset.c 2007-05-20 01:51:47.000000000 +0200
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@@ -29,224 +29,21 @@
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#include <linux/types.h>
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-/* No, there's no macro saying 12*4, since it is "hard" to get it into
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- the asm in a good way. Thus better to expose the problem everywhere.
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- */
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-/* Assuming 1 cycle per dword written or read (ok, not really true), and
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- one per instruction, then 43+3*(n/48-1) <= 24+24*(n/48-1)
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- so n >= 45.7; n >= 0.9; we win on the first full 48-byte block to set. */
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-
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-#define ZERO_BLOCK_SIZE (1*12*4)
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-
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-void *memset(void *pdst,
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- int c,
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- size_t plen)
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+/**
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+ * memset - Fill a region of memory with the given value
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+ * @s: Pointer to the start of the area.
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+ * @c: The byte to fill the area with
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+ * @count: The size of the area.
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+ *
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+ * Do not use memset() to access IO space, use memset_io() instead.
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+ */
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+void *memset(void *s, int c, size_t count)
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{
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- /* Ok. Now we want the parameters put in special registers.
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- Make sure the compiler is able to make something useful of this. */
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-
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- register char *return_dst __asm__ ("r10") = pdst;
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- register int n __asm__ ("r12") = plen;
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- register int lc __asm__ ("r11") = c;
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-
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- /* Most apps use memset sanely. Only those memsetting about 3..4
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- bytes or less get penalized compared to the generic implementation
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- - and that's not really sane use. */
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-
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- /* Ugh. This is fragile at best. Check with newer GCC releases, if
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- they compile cascaded "x |= x << 8" sanely! */
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- __asm__("movu.b %0,$r13\n\t"
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- "lslq 8,$r13\n\t"
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- "move.b %0,$r13\n\t"
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- "move.d $r13,%0\n\t"
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- "lslq 16,$r13\n\t"
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- "or.d $r13,%0"
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- : "=r" (lc) : "0" (lc) : "r13");
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-
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- {
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- register char *dst __asm__ ("r13") = pdst;
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-
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- /* This is NONPORTABLE, but since this whole routine is */
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- /* grossly nonportable that doesn't matter. */
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-
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- if (((unsigned long) pdst & 3) != 0
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- /* Oops! n=0 must be a legal call, regardless of alignment. */
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- && n >= 3)
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- {
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- if ((unsigned long)dst & 1)
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- {
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- *dst = (char) lc;
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- n--;
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- dst++;
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- }
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-
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- if ((unsigned long)dst & 2)
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- {
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- *(short *)dst = lc;
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- n -= 2;
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- dst += 2;
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- }
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- }
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-
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- /* Now the fun part. For the threshold value of this, check the equation
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- above. */
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- /* Decide which copying method to use. */
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- if (n >= ZERO_BLOCK_SIZE)
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- {
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- /* For large copies we use 'movem' */
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-
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- /* It is not optimal to tell the compiler about clobbering any
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- registers; that will move the saving/restoring of those registers
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- to the function prologue/epilogue, and make non-movem sizes
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- suboptimal.
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-
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- This method is not foolproof; it assumes that the "asm reg"
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- declarations at the beginning of the function really are used
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- here (beware: they may be moved to temporary registers).
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- This way, we do not have to save/move the registers around into
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- temporaries; we can safely use them straight away.
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-
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- If you want to check that the allocation was right; then
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- check the equalities in the first comment. It should say
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- "r13=r13, r12=r12, r11=r11" */
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--- linux-2.6.19.2.orig/arch/cris/arch-v10/lib/memset.c 2007-06-03 13:59:39.000000000 +0200
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+++ linux-2.6.19.2/arch/cris/arch-v10/lib/memset.c 2007-06-03 14:11:43.000000000 +0200
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@@ -110,45 +110,28 @@
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If you want to check that the allocation was right; then
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check the equalities in the first comment. It should say
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"r13=r13, r12=r12, r11=r11" */
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- __asm__ volatile ("
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- ;; Check that the following is true (same register names on
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- ;; both sides of equal sign, as in r8=r8):
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@ -121,7 +31,28 @@ diff -urN linux-2.6.19.2.orig/arch/cris/arch-v10/lib/memset.c linux-2.6.19.2/arc
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- ;; Now we've got this:
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- ;; r13 - dst
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- ;; r12 - n
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-
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+ __asm__ volatile (
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+ "subq 11*4,$sp\n\t"
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+ "movem $r10,[$sp]\n\t"
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+ "move.d $r11,$r0\n\t"
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+ "move.d $r11,$r1\n\t"
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+ "move.d $r11,$r2\n\t"
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+ "move.d $r11,$r3\n\t"
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+ "move.d $r11,$r4\n\t"
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+ "move.d $r11,$r5\n\t"
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+ "move.d $r11,$r6\n\t"
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+ "move.d $r11,$r7\n\t"
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+ "move.d $r11,$r8\n\t"
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+ "move.d $r11,$r9\n\t"
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+ "move.d $r11,$r10\n\t"
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+ "subq 12*4,$r12\n\t"
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+"0:\n\t"
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+ "subq 12*4,$r12\n\t"
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+ "bge 0b\n\t"
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+ "movem $r11,[$r13+]\n\t"
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+ "addq 12*4,$r12\n\t"
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+ "movem [$sp+],$r10"
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- ;; Update n for the first loop
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- subq 12*4,$r12
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-0:
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@ -134,193 +65,159 @@ diff -urN linux-2.6.19.2.orig/arch/cris/arch-v10/lib/memset.c linux-2.6.19.2/arc
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- ;; Restore registers from stack
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- movem [$sp+],$r10"
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-
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- /* Outputs */ : "=r" (dst), "=r" (n)
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- /* Inputs */ : "0" (dst), "1" (n), "r" (lc));
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-
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- }
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-
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- /* Either we directly starts copying, using dword copying
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- in a loop, or we copy as much as possible with 'movem'
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- and then the last block (<44 bytes) is copied here.
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- This will work since 'movem' will have updated src,dst,n. */
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-
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- while ( n >= 16 )
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- {
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- *((long*)dst)++ = lc;
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- *((long*)dst)++ = lc;
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- *((long*)dst)++ = lc;
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- *((long*)dst)++ = lc;
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- n -= 16;
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- }
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+ char *xs = s;
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/* Outputs */ : "=r" (dst), "=r" (n)
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/* Inputs */ : "0" (dst), "1" (n), "r" (lc));
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@@ -161,10 +144,14 @@
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- /* A switch() is definitely the fastest although it takes a LOT of code.
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- * Particularly if you inline code this.
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- */
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- switch (n)
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- {
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- case 0:
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- break;
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- case 1:
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- *(char*)dst = (char) lc;
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- break;
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- case 2:
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- *(short*)dst = (short) lc;
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- break;
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- case 3:
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- *((short*)dst)++ = (short) lc;
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- *(char*)dst = (char) lc;
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- break;
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- case 4:
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- *((long*)dst)++ = lc;
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- break;
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- case 5:
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- *((long*)dst)++ = lc;
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- *(char*)dst = (char) lc;
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- break;
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- case 6:
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- *((long*)dst)++ = lc;
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- *(short*)dst = (short) lc;
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- break;
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- case 7:
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- *((long*)dst)++ = lc;
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- *((short*)dst)++ = (short) lc;
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- *(char*)dst = (char) lc;
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- break;
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- case 8:
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- *((long*)dst)++ = lc;
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- *((long*)dst)++ = lc;
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- break;
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- case 9:
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- *((long*)dst)++ = lc;
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- *((long*)dst)++ = lc;
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- *(char*)dst = (char) lc;
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- break;
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- case 10:
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- *((long*)dst)++ = lc;
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- *((long*)dst)++ = lc;
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- *(short*)dst = (short) lc;
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- break;
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- case 11:
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- *((long*)dst)++ = lc;
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- *((long*)dst)++ = lc;
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- *((short*)dst)++ = (short) lc;
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- *(char*)dst = (char) lc;
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- break;
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- case 12:
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- *((long*)dst)++ = lc;
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- *((long*)dst)++ = lc;
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- *((long*)dst)++ = lc;
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- break;
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- case 13:
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- *((long*)dst)++ = lc;
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- *((long*)dst)++ = lc;
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- *((long*)dst)++ = lc;
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- *(char*)dst = (char) lc;
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- break;
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- case 14:
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- *((long*)dst)++ = lc;
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- *((long*)dst)++ = lc;
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- *((long*)dst)++ = lc;
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- *(short*)dst = (short) lc;
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- break;
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- case 15:
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- *((long*)dst)++ = lc;
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- *((long*)dst)++ = lc;
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- *((long*)dst)++ = lc;
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- *((short*)dst)++ = (short) lc;
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- *(char*)dst = (char) lc;
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- break;
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- }
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- }
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+ while (count--)
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+ *xs++ = c;
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+ return s;
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+}
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while ( n >= 16 )
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{
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- *((long*)dst)++ = lc;
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- *((long*)dst)++ = lc;
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- *((long*)dst)++ = lc;
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- *((long*)dst)++ = lc;
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+ *((long*)dst) = lc;
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+ dst+=4;
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+ *((long*)dst) = lc;
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+ dst+=4;
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+ *((long*)dst) = lc;
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+ dst+=4;
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+ *((long*)dst) = lc;
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+ dst+=4;
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n -= 16;
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}
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- return return_dst; /* destination pointer. */
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-} /* memset() */
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@@ -182,67 +169,95 @@
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*(short*)dst = (short) lc;
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break;
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case 3:
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- *((short*)dst)++ = (short) lc;
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+ *((short*)dst) = (short) lc;
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+ dst+=2;
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*(char*)dst = (char) lc;
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break;
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case 4:
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- *((long*)dst)++ = lc;
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+ *((long*)dst) = lc;
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+ dst+=4;
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break;
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case 5:
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- *((long*)dst)++ = lc;
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+ *((long*)dst) = lc;
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+ dst+=4;
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*(char*)dst = (char) lc;
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break;
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case 6:
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- *((long*)dst)++ = lc;
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+ *((long*)dst) = lc;
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+ dst+=4;
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*(short*)dst = (short) lc;
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break;
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case 7:
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- *((long*)dst)++ = lc;
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- *((short*)dst)++ = (short) lc;
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+ *((long*)dst) = lc;
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+ dst+=4;
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+ *((short*)dst) = (short) lc;
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+ dst+=2;
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*(char*)dst = (char) lc;
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break;
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case 8:
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- *((long*)dst)++ = lc;
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- *((long*)dst)++ = lc;
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+ *((long*)dst) = lc;
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+ dst+=4;
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+ *((long*)dst) = lc;
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+ dst+=4;
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break;
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case 9:
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- *((long*)dst)++ = lc;
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- *((long*)dst)++ = lc;
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+ *((long*)dst) = lc;
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+ dst+=4;
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+ *((long*)dst) = lc;
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+ dst+=4;
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*(char*)dst = (char) lc;
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break;
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case 10:
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- *((long*)dst)++ = lc;
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- *((long*)dst)++ = lc;
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+ *((long*)dst) = lc;
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+ dst+=4;
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+ *((long*)dst) = lc;
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+ dst+=4;
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*(short*)dst = (short) lc;
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break;
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case 11:
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- *((long*)dst)++ = lc;
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- *((long*)dst)++ = lc;
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- *((short*)dst)++ = (short) lc;
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+ *((long*)dst) = lc;
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+ dst+=4;
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+ *((long*)dst) = lc;
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+ dst+=4;
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+ *((short*)dst) = (short) lc;
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+ dst+=2;
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*(char*)dst = (char) lc;
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break;
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case 12:
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- *((long*)dst)++ = lc;
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- *((long*)dst)++ = lc;
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- *((long*)dst)++ = lc;
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+ *((long*)dst) = lc;
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+ dst+=4;
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+ *((long*)dst) = lc;
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+ dst+=4;
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+ *((long*)dst) = lc;
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+ dst+=4;
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break;
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case 13:
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- *((long*)dst)++ = lc;
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- *((long*)dst)++ = lc;
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- *((long*)dst)++ = lc;
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+ *((long*)dst) = lc;
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+ dst+=4;
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+ *((long*)dst) = lc;
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+ dst+=4;
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+ *((long*)dst) = lc;
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+ dst+=4;
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*(char*)dst = (char) lc;
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break;
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case 14:
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- *((long*)dst)++ = lc;
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- *((long*)dst)++ = lc;
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- *((long*)dst)++ = lc;
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+ *((long*)dst) = lc;
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+ dst+=4;
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+ *((long*)dst) = lc;
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+ dst+=4;
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+ *((long*)dst) = lc;
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+ dst+=4;
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*(short*)dst = (short) lc;
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break;
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case 15:
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- *((long*)dst)++ = lc;
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- *((long*)dst)++ = lc;
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- *((long*)dst)++ = lc;
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- *((short*)dst)++ = (short) lc;
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+ *((long*)dst) = lc;
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+ dst+=4;
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+ *((long*)dst) = lc;
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+ dst+=4;
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+ *((long*)dst) = lc;
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+ dst+=4;
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+ *((short*)dst) = (short) lc;
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+ dst+=2;
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*(char*)dst = (char) lc;
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break;
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}
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diff -urN linux-2.6.19.2.orig/arch/cris/arch-v10/lib/string.c linux-2.6.19.2/arch/cris/arch-v10/lib/string.c
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--- linux-2.6.19.2.orig/arch/cris/arch-v10/lib/string.c 2007-05-20 01:46:35.000000000 +0200
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+++ linux-2.6.19.2/arch/cris/arch-v10/lib/string.c 2007-05-20 01:51:19.000000000 +0200
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@@ -33,193 +33,21 @@
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#include <linux/types.h>
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-void *memcpy(void *pdst,
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- const void *psrc,
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- size_t pn)
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+ /**
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+ * memcpy - Copy one area of memory to another
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+ * @dest: Where to copy to
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+ * @src: Where to copy from
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+ * @count: The size of the area.
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+ *
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+ * You should not use this function to access IO space, use memcpy_toio()
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+ * or memcpy_fromio() instead.
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+ */
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+void *memcpy(void *dest, const void *src, size_t count)
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{
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- /* Ok. Now we want the parameters put in special registers.
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- Make sure the compiler is able to make something useful of this.
|
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- As it is now: r10 -> r13; r11 -> r11 (nop); r12 -> r12 (nop).
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+ char *tmp = dest;
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+ const char *s = src;
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- If gcc was allright, it really would need no temporaries, and no
|
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- stack space to save stuff on. */
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-
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- register void *return_dst __asm__ ("r10") = pdst;
|
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- register char *dst __asm__ ("r13") = pdst;
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- register const char *src __asm__ ("r11") = psrc;
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- register int n __asm__ ("r12") = pn;
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-
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-
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- /* When src is aligned but not dst, this makes a few extra needless
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- cycles. I believe it would take as many to check that the
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- re-alignment was unnecessary. */
|
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- if (((unsigned long) dst & 3) != 0
|
||||
- /* Don't align if we wouldn't copy more than a few bytes; so we
|
||||
- don't have to check further for overflows. */
|
||||
- && n >= 3)
|
||||
- {
|
||||
- if ((unsigned long) dst & 1)
|
||||
- {
|
||||
- n--;
|
||||
- *(char*)dst = *(char*)src;
|
||||
- src++;
|
||||
- dst++;
|
||||
- }
|
||||
-
|
||||
- if ((unsigned long) dst & 2)
|
||||
- {
|
||||
- n -= 2;
|
||||
- *(short*)dst = *(short*)src;
|
||||
- src += 2;
|
||||
- dst += 2;
|
||||
- }
|
||||
- }
|
||||
-
|
||||
- /* Decide which copying method to use. */
|
||||
- if (n >= 44*2) /* Break even between movem and
|
||||
- move16 is at 38.7*2, but modulo 44. */
|
||||
- {
|
||||
- /* For large copies we use 'movem' */
|
||||
-
|
||||
- /* It is not optimal to tell the compiler about clobbering any
|
||||
- registers; that will move the saving/restoring of those registers
|
||||
- to the function prologue/epilogue, and make non-movem sizes
|
||||
- suboptimal.
|
||||
-
|
||||
- This method is not foolproof; it assumes that the "asm reg"
|
||||
- declarations at the beginning of the function really are used
|
||||
- here (beware: they may be moved to temporary registers).
|
||||
- This way, we do not have to save/move the registers around into
|
||||
- temporaries; we can safely use them straight away.
|
||||
-
|
||||
- If you want to check that the allocation was right; then
|
||||
- check the equalities in the first comment. It should say
|
||||
- "r13=r13, r11=r11, r12=r12" */
|
||||
--- linux-2.6.19.2.orig/arch/cris/arch-v10/lib/string.c 2007-06-03 13:59:39.000000000 +0200
|
||||
+++ linux-2.6.19.2/arch/cris/arch-v10/lib/string.c 2007-06-03 14:21:02.000000000 +0200
|
||||
@@ -95,37 +95,19 @@
|
||||
If you want to check that the allocation was right; then
|
||||
check the equalities in the first comment. It should say
|
||||
"r13=r13, r11=r11, r12=r12" */
|
||||
- __asm__ volatile ("
|
||||
- ;; Check that the following is true (same register names on
|
||||
- ;; both sides of equal sign, as in r8=r8):
|
||||
|
@ -349,113 +246,169 @@ diff -urN linux-2.6.19.2.orig/arch/cris/arch-v10/lib/string.c linux-2.6.19.2/arc
|
|||
- ;; Restore registers from stack
|
||||
- movem [$sp+],$r10"
|
||||
-
|
||||
- /* Outputs */ : "=r" (dst), "=r" (src), "=r" (n)
|
||||
- /* Inputs */ : "0" (dst), "1" (src), "2" (n));
|
||||
+ __asm__ volatile (
|
||||
+ "subq 11*4,$sp\n\t"
|
||||
+ "movem $r10,[$sp]\n\t"
|
||||
+ "subq 44,$r12\n\t"
|
||||
+"0:\n\t"
|
||||
+ "movem [$r11+],$r10\n\t"
|
||||
+ "subq 44,$r12\n\t"
|
||||
+ "bge 0b\n\t"
|
||||
+ "movem $r10,[$r13+]\n\t"
|
||||
+ "addq 44,$r12\n\t"
|
||||
+ "movem [$sp+],$r10\n\t"
|
||||
/* Outputs */ : "=r" (dst), "=r" (src), "=r" (n)
|
||||
/* Inputs */ : "0" (dst), "1" (src), "2" (n));
|
||||
-
|
||||
- }
|
||||
-
|
||||
- /* Either we directly starts copying, using dword copying
|
||||
- in a loop, or we copy as much as possible with 'movem'
|
||||
- and then the last block (<44 bytes) is copied here.
|
||||
- This will work since 'movem' will have updated src,dst,n. */
|
||||
-
|
||||
- while ( n >= 16 )
|
||||
- {
|
||||
}
|
||||
|
||||
/* Either we directly starts copying, using dword copying
|
||||
@@ -135,10 +117,14 @@
|
||||
|
||||
while ( n >= 16 )
|
||||
{
|
||||
- *((long*)dst)++ = *((long*)src)++;
|
||||
- *((long*)dst)++ = *((long*)src)++;
|
||||
- *((long*)dst)++ = *((long*)src)++;
|
||||
- *((long*)dst)++ = *((long*)src)++;
|
||||
- n -= 16;
|
||||
- }
|
||||
-
|
||||
- /* A switch() is definitely the fastest although it takes a LOT of code.
|
||||
- * Particularly if you inline code this.
|
||||
- */
|
||||
- switch (n)
|
||||
- {
|
||||
- case 0:
|
||||
- break;
|
||||
- case 1:
|
||||
- *(char*)dst = *(char*)src;
|
||||
- break;
|
||||
- case 2:
|
||||
- *(short*)dst = *(short*)src;
|
||||
- break;
|
||||
- case 3:
|
||||
+ *((long*)dst) = *((long*)src);
|
||||
+ src+=4;dst+=4;
|
||||
+ *((long*)dst) = *((long*)src);
|
||||
+ src+=4;dst+=4;
|
||||
+ *((long*)dst) = *((long*)src);
|
||||
+ src+=4;dst+=4;
|
||||
+ *((long*)dst) = *((long*)src);
|
||||
+ src+=4;dst+=4;
|
||||
n -= 16;
|
||||
}
|
||||
|
||||
@@ -156,67 +142,95 @@
|
||||
*(short*)dst = *(short*)src;
|
||||
break;
|
||||
case 3:
|
||||
- *((short*)dst)++ = *((short*)src)++;
|
||||
- *(char*)dst = *(char*)src;
|
||||
- break;
|
||||
- case 4:
|
||||
+ *((short*)dst) = *((short*)src);
|
||||
+ src+=2;dst+=2;
|
||||
*(char*)dst = *(char*)src;
|
||||
break;
|
||||
case 4:
|
||||
- *((long*)dst)++ = *((long*)src)++;
|
||||
- break;
|
||||
- case 5:
|
||||
+ *((long*)dst) = *((long*)src);
|
||||
+ src+=4;dst+=4;
|
||||
break;
|
||||
case 5:
|
||||
- *((long*)dst)++ = *((long*)src)++;
|
||||
- *(char*)dst = *(char*)src;
|
||||
- break;
|
||||
- case 6:
|
||||
+ *((long*)dst) = *((long*)src);
|
||||
+ src+=4;dst+=4;
|
||||
*(char*)dst = *(char*)src;
|
||||
break;
|
||||
case 6:
|
||||
- *((long*)dst)++ = *((long*)src)++;
|
||||
- *(short*)dst = *(short*)src;
|
||||
- break;
|
||||
- case 7:
|
||||
+ *((long*)dst) = *((long*)src);
|
||||
+ src+=4;dst+=4;
|
||||
*(short*)dst = *(short*)src;
|
||||
break;
|
||||
case 7:
|
||||
- *((long*)dst)++ = *((long*)src)++;
|
||||
- *((short*)dst)++ = *((short*)src)++;
|
||||
- *(char*)dst = *(char*)src;
|
||||
- break;
|
||||
- case 8:
|
||||
+ *((long*)dst) = *((long*)src);
|
||||
+ src+=4;dst+=4;
|
||||
+ *((short*)dst) = *((short*)src);
|
||||
+ src+=2;dst+=2;
|
||||
*(char*)dst = *(char*)src;
|
||||
break;
|
||||
case 8:
|
||||
- *((long*)dst)++ = *((long*)src)++;
|
||||
- *((long*)dst)++ = *((long*)src)++;
|
||||
- break;
|
||||
- case 9:
|
||||
+ *((long*)dst) = *((long*)src);
|
||||
+ src+=4;dst+=4;
|
||||
+ *((long*)dst) = *((long*)src);
|
||||
+ src+=4;dst+=4;
|
||||
break;
|
||||
case 9:
|
||||
- *((long*)dst)++ = *((long*)src)++;
|
||||
- *((long*)dst)++ = *((long*)src)++;
|
||||
- *(char*)dst = *(char*)src;
|
||||
- break;
|
||||
- case 10:
|
||||
+ *((long*)dst) = *((long*)src);
|
||||
+ src+=4;dst+=4;
|
||||
+ *((long*)dst) = *((long*)src);
|
||||
+ src+=4;dst+=4;
|
||||
*(char*)dst = *(char*)src;
|
||||
break;
|
||||
case 10:
|
||||
- *((long*)dst)++ = *((long*)src)++;
|
||||
- *((long*)dst)++ = *((long*)src)++;
|
||||
- *(short*)dst = *(short*)src;
|
||||
- break;
|
||||
- case 11:
|
||||
+ *((long*)dst) = *((long*)src);
|
||||
+ src+=4;dst+=4;
|
||||
+ *((long*)dst) = *((long*)src);
|
||||
+ src+=4;dst+=4;
|
||||
*(short*)dst = *(short*)src;
|
||||
break;
|
||||
case 11:
|
||||
- *((long*)dst)++ = *((long*)src)++;
|
||||
- *((long*)dst)++ = *((long*)src)++;
|
||||
- *((short*)dst)++ = *((short*)src)++;
|
||||
- *(char*)dst = *(char*)src;
|
||||
- break;
|
||||
- case 12:
|
||||
+ *((long*)dst) = *((long*)src);
|
||||
+ src+=4;dst+=4;
|
||||
+ *((long*)dst) = *((long*)src);
|
||||
+ src+=4;dst+=4;
|
||||
+ *((short*)dst) = *((short*)src);
|
||||
+ src+=2;dst+=2;
|
||||
*(char*)dst = *(char*)src;
|
||||
break;
|
||||
case 12:
|
||||
- *((long*)dst)++ = *((long*)src)++;
|
||||
- *((long*)dst)++ = *((long*)src)++;
|
||||
- *((long*)dst)++ = *((long*)src)++;
|
||||
- break;
|
||||
- case 13:
|
||||
+ *((long*)dst) = *((long*)src);
|
||||
+ src+=4;dst+=4;
|
||||
+ *((long*)dst) = *((long*)src);
|
||||
+ src+=4;dst+=4;
|
||||
+ *((long*)dst) = *((long*)src);
|
||||
+ src+=4;dst+=4;
|
||||
break;
|
||||
case 13:
|
||||
- *((long*)dst)++ = *((long*)src)++;
|
||||
- *((long*)dst)++ = *((long*)src)++;
|
||||
- *((long*)dst)++ = *((long*)src)++;
|
||||
- *(char*)dst = *(char*)src;
|
||||
- break;
|
||||
- case 14:
|
||||
+ *((long*)dst) = *((long*)src);
|
||||
+ src+=4;dst+=4;
|
||||
+ *((long*)dst) = *((long*)src);
|
||||
+ src+=4;dst+=4;
|
||||
+ *((long*)dst) = *((long*)src);
|
||||
+ src+=4;dst+=4;
|
||||
*(char*)dst = *(char*)src;
|
||||
break;
|
||||
case 14:
|
||||
- *((long*)dst)++ = *((long*)src)++;
|
||||
- *((long*)dst)++ = *((long*)src)++;
|
||||
- *((long*)dst)++ = *((long*)src)++;
|
||||
- *(short*)dst = *(short*)src;
|
||||
- break;
|
||||
- case 15:
|
||||
+ *((long*)dst) = *((long*)src);
|
||||
+ src+=4;dst+=4;
|
||||
+ *((long*)dst) = *((long*)src);
|
||||
+ src+=4;dst+=4;
|
||||
+ *((long*)dst) = *((long*)src);
|
||||
+ src+=4;dst+=4;
|
||||
*(short*)dst = *(short*)src;
|
||||
break;
|
||||
case 15:
|
||||
- *((long*)dst)++ = *((long*)src)++;
|
||||
- *((long*)dst)++ = *((long*)src)++;
|
||||
- *((long*)dst)++ = *((long*)src)++;
|
||||
- *((short*)dst)++ = *((short*)src)++;
|
||||
- *(char*)dst = *(char*)src;
|
||||
- break;
|
||||
- }
|
||||
-
|
||||
- return return_dst; /* destination pointer. */
|
||||
-} /* memcpy() */
|
||||
+ while (count--)
|
||||
+ *tmp++ = *s++;
|
||||
+ return dest;
|
||||
+}
|
||||
+ *((long*)dst) = *((long*)src);
|
||||
+ src+=4;dst+=4;
|
||||
+ *((long*)dst) = *((long*)src);
|
||||
+ src+=4;dst+=4;
|
||||
+ *((long*)dst) = *((long*)src);
|
||||
+ src+=4;dst+=4;
|
||||
+ *((short*)dst) = *((short*)src);
|
||||
+ src+=2;dst+=2;
|
||||
*(char*)dst = *(char*)src;
|
||||
break;
|
||||
}
|
||||
diff -urN linux-2.6.19.2.orig/arch/cris/arch-v10/lib/usercopy.c linux-2.6.19.2/arch/cris/arch-v10/lib/usercopy.c
|
||||
--- linux-2.6.19.2.orig/arch/cris/arch-v10/lib/usercopy.c 2007-05-16 22:11:26.000000000 +0200
|
||||
+++ linux-2.6.19.2/arch/cris/arch-v10/lib/usercopy.c 2007-05-16 23:17:41.000000000 +0200
|
||||
--- linux-2.6.19.2.orig/arch/cris/arch-v10/lib/usercopy.c 2007-06-03 13:59:39.000000000 +0200
|
||||
+++ linux-2.6.19.2/arch/cris/arch-v10/lib/usercopy.c 2007-06-03 14:25:55.000000000 +0200
|
||||
@@ -88,63 +88,38 @@
|
||||
If you want to check that the allocation was right; then
|
||||
check the equalities in the first comment. It should say
|
||||
|
|
Loading…
Reference in New Issue