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openwrt/target/linux/etrax-2.6/patches/cris/006-gcc-4.patch
John Crispin 7b071f1bfc reworked memset,memcpy of the cris kernel, this improves board speed by factor 20 
SVN-Revision: 7478
2007-06-03 13:02:21 +00:00

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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
--- linux-2.6.19.2.orig/arch/cris/arch-v10/lib/memset.c 2007-06-03 13:59:39.000000000 +0200
+++ linux-2.6.19.2/arch/cris/arch-v10/lib/memset.c 2007-06-03 14:11:43.000000000 +0200
@@ -110,45 +110,28 @@
If you want to check that the allocation was right; then
check the equalities in the first comment. It should say
"r13=r13, r12=r12, r11=r11" */
- __asm__ volatile ("
- ;; Check that the following is true (same register names on
- ;; both sides of equal sign, as in r8=r8):
- ;; %0=r13, %1=r12, %4=r11
- ;;
- ;; Save the registers we'll clobber in the movem process
- ;; on the stack. Don't mention them to gcc, it will only be
- ;; upset.
- subq 11*4,$sp
- movem $r10,[$sp]
-
- move.d $r11,$r0
- move.d $r11,$r1
- move.d $r11,$r2
- move.d $r11,$r3
- move.d $r11,$r4
- move.d $r11,$r5
- move.d $r11,$r6
- move.d $r11,$r7
- move.d $r11,$r8
- move.d $r11,$r9
- move.d $r11,$r10
-
- ;; Now we've got this:
- ;; r13 - dst
- ;; r12 - n
+ __asm__ volatile (
+ "subq 11*4,$sp\n\t"
+ "movem $r10,[$sp]\n\t"
+ "move.d $r11,$r0\n\t"
+ "move.d $r11,$r1\n\t"
+ "move.d $r11,$r2\n\t"
+ "move.d $r11,$r3\n\t"
+ "move.d $r11,$r4\n\t"
+ "move.d $r11,$r5\n\t"
+ "move.d $r11,$r6\n\t"
+ "move.d $r11,$r7\n\t"
+ "move.d $r11,$r8\n\t"
+ "move.d $r11,$r9\n\t"
+ "move.d $r11,$r10\n\t"
+ "subq 12*4,$r12\n\t"
+"0:\n\t"
+ "subq 12*4,$r12\n\t"
+ "bge 0b\n\t"
+ "movem $r11,[$r13+]\n\t"
+ "addq 12*4,$r12\n\t"
+ "movem [$sp+],$r10"
- ;; Update n for the first loop
- subq 12*4,$r12
-0:
- subq 12*4,$r12
- bge 0b
- movem $r11,[$r13+]
-
- addq 12*4,$r12 ;; compensate for last loop underflowing n
-
- ;; Restore registers from stack
- movem [$sp+],$r10"
-
/* Outputs */ : "=r" (dst), "=r" (n)
/* Inputs */ : "0" (dst), "1" (n), "r" (lc));
@@ -161,10 +144,14 @@
while ( n >= 16 )
{
- *((long*)dst)++ = lc;
- *((long*)dst)++ = lc;
- *((long*)dst)++ = lc;
- *((long*)dst)++ = lc;
+ *((long*)dst) = lc;
+ dst+=4;
+ *((long*)dst) = lc;
+ dst+=4;
+ *((long*)dst) = lc;
+ dst+=4;
+ *((long*)dst) = lc;
+ dst+=4;
n -= 16;
}
@@ -182,67 +169,95 @@
*(short*)dst = (short) lc;
break;
case 3:
- *((short*)dst)++ = (short) lc;
+ *((short*)dst) = (short) lc;
+ dst+=2;
*(char*)dst = (char) lc;
break;
case 4:
- *((long*)dst)++ = lc;
+ *((long*)dst) = lc;
+ dst+=4;
break;
case 5:
- *((long*)dst)++ = lc;
+ *((long*)dst) = lc;
+ dst+=4;
*(char*)dst = (char) lc;
break;
case 6:
- *((long*)dst)++ = lc;
+ *((long*)dst) = lc;
+ dst+=4;
*(short*)dst = (short) lc;
break;
case 7:
- *((long*)dst)++ = lc;
- *((short*)dst)++ = (short) lc;
+ *((long*)dst) = lc;
+ dst+=4;
+ *((short*)dst) = (short) lc;
+ dst+=2;
*(char*)dst = (char) lc;
break;
case 8:
- *((long*)dst)++ = lc;
- *((long*)dst)++ = lc;
+ *((long*)dst) = lc;
+ dst+=4;
+ *((long*)dst) = lc;
+ dst+=4;
break;
case 9:
- *((long*)dst)++ = lc;
- *((long*)dst)++ = lc;
+ *((long*)dst) = lc;
+ dst+=4;
+ *((long*)dst) = lc;
+ dst+=4;
*(char*)dst = (char) lc;
break;
case 10:
- *((long*)dst)++ = lc;
- *((long*)dst)++ = lc;
+ *((long*)dst) = lc;
+ dst+=4;
+ *((long*)dst) = lc;
+ dst+=4;
*(short*)dst = (short) lc;
break;
case 11:
- *((long*)dst)++ = lc;
- *((long*)dst)++ = lc;
- *((short*)dst)++ = (short) lc;
+ *((long*)dst) = lc;
+ dst+=4;
+ *((long*)dst) = lc;
+ dst+=4;
+ *((short*)dst) = (short) lc;
+ dst+=2;
*(char*)dst = (char) lc;
break;
case 12:
- *((long*)dst)++ = lc;
- *((long*)dst)++ = lc;
- *((long*)dst)++ = lc;
+ *((long*)dst) = lc;
+ dst+=4;
+ *((long*)dst) = lc;
+ dst+=4;
+ *((long*)dst) = lc;
+ dst+=4;
break;
case 13:
- *((long*)dst)++ = lc;
- *((long*)dst)++ = lc;
- *((long*)dst)++ = lc;
+ *((long*)dst) = lc;
+ dst+=4;
+ *((long*)dst) = lc;
+ dst+=4;
+ *((long*)dst) = lc;
+ dst+=4;
*(char*)dst = (char) lc;
break;
case 14:
- *((long*)dst)++ = lc;
- *((long*)dst)++ = lc;
- *((long*)dst)++ = lc;
+ *((long*)dst) = lc;
+ dst+=4;
+ *((long*)dst) = lc;
+ dst+=4;
+ *((long*)dst) = lc;
+ dst+=4;
*(short*)dst = (short) lc;
break;
case 15:
- *((long*)dst)++ = lc;
- *((long*)dst)++ = lc;
- *((long*)dst)++ = lc;
- *((short*)dst)++ = (short) lc;
+ *((long*)dst) = lc;
+ dst+=4;
+ *((long*)dst) = lc;
+ dst+=4;
+ *((long*)dst) = lc;
+ dst+=4;
+ *((short*)dst) = (short) lc;
+ dst+=2;
*(char*)dst = (char) lc;
break;
}
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
--- 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):
- ;; %0=r13, %1=r11, %2=r12
- ;;
- ;; Save the registers we'll use in the movem process
- ;; on the stack.
- subq 11*4,$sp
- movem $r10,[$sp]
-
- ;; Now we've got this:
- ;; r11 - src
- ;; r13 - dst
- ;; r12 - n
-
- ;; Update n for the first loop
- subq 44,$r12
-0:
- movem [$r11+],$r10
- subq 44,$r12
- bge 0b
- movem $r10,[$r13+]
-
- addq 44,$r12 ;; compensate for last loop underflowing n
-
- ;; Restore registers from stack
- movem [$sp+],$r10"
-
+ __asm__ volatile (
+ "subq 11*4,$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
@@ -135,10 +117,14 @@
while ( n >= 16 )
{
- *((long*)dst)++ = *((long*)src)++;
- *((long*)dst)++ = *((long*)src)++;
- *((long*)dst)++ = *((long*)src)++;
- *((long*)dst)++ = *((long*)src)++;
+ *((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)++;
+ *((short*)dst) = *((short*)src);
+ src+=2;dst+=2;
*(char*)dst = *(char*)src;
break;
case 4:
- *((long*)dst)++ = *((long*)src)++;
+ *((long*)dst) = *((long*)src);
+ src+=4;dst+=4;
break;
case 5:
- *((long*)dst)++ = *((long*)src)++;
+ *((long*)dst) = *((long*)src);
+ src+=4;dst+=4;
*(char*)dst = *(char*)src;
break;
case 6:
- *((long*)dst)++ = *((long*)src)++;
+ *((long*)dst) = *((long*)src);
+ src+=4;dst+=4;
*(short*)dst = *(short*)src;
break;
case 7:
- *((long*)dst)++ = *((long*)src)++;
- *((short*)dst)++ = *((short*)src)++;
+ *((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)++;
+ *((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)++;
+ *((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)++;
+ *((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)++;
+ *((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)++;
+ *((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)++;
+ *((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)++;
+ *((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)++;
+ *((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 2007-06-03 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
"r13=r13, r11=r11, r12=r12". */
- __asm__ volatile ("\
- .ifnc %0%1%2%3,$r13$r11$r12$r10 \n\
- .err \n\
- .endif \n\
-
- ;; Save the registers we'll use in the movem process
- ;; on the stack.
- subq 11*4,$sp
- movem $r10,[$sp]
-
- ;; Now we've got this:
- ;; r11 - src
- ;; r13 - dst
- ;; r12 - n
-
- ;; Update n for the first loop
- subq 44,$r12
-
-; Since the noted PC of a faulting instruction in a delay-slot of a taken
-; branch, is that of the branch target, we actually point at the from-movem
-; for this case. There is no ambiguity here; if there was a fault in that
-; instruction (meaning a kernel oops), the faulted PC would be the address
-; after *that* movem.
-
-0:
- movem [$r11+],$r10
- subq 44,$r12
- bge 0b
- movem $r10,[$r13+]
-1:
- addq 44,$r12 ;; compensate for last loop underflowing n
-
- ;; Restore registers from stack
- movem [$sp+],$r10
-2:
- .section .fixup,\"ax\"
-
-; To provide a correct count in r10 of bytes that failed to be copied,
-; we jump back into the loop if the loop-branch was taken. There is no
-; performance penalty for sany use; the program will segfault soon enough.
-
-3:
- move.d [$sp],$r10
- addq 44,$r10
- move.d $r10,[$sp]
- jump 0b
-4:
- movem [$sp+],$r10
- addq 44,$r10
- addq 44,$r12
- jump 2b
-
- .previous
- .section __ex_table,\"a\"
- .dword 0b,3b
- .dword 1b,4b
- .previous"
+ __asm__ volatile (
+ ".ifnc %0%1%2%3,$r13$r11$r12$r10 \n\t"
+ ".err \n\t"
+ ".endif \n\t"
+ "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"
+ "1:\n\t"
+ "addq 44,$r12 \n\t"
+ "movem [$sp+],$r10\n\t"
+ "2:\n\t"
+ ".section .fixup,\"ax\"\n\t"
+ "3:\n\t"
+ "move.d [$sp],$r10\n\t"
+ "addq 44,$r10\n\t"
+ "move.d $r10,[$sp]\n\t"
+ "jump 0b\n\t"
+ "4:\n\t"
+ "movem [$sp+],$r10\n\t"
+ "addq 44,$r10\n\t"
+ "addq 44,$r12\n\t"
+ "jump 2b\n\t"
+ ".previous\n\t"
+ ".section __ex_table,\"a\"\n\t"
+ ".dword 0b,3b\n\t"
+ ".dword 1b,4b\n\t"
+ ".previous\n\t"
/* Outputs */ : "=r" (dst), "=r" (src), "=r" (n), "=r" (retn)
/* Inputs */ : "0" (dst), "1" (src), "2" (n), "3" (retn));
@@ -253,60 +228,32 @@
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 ("
- .ifnc %0%1%2%3,$r13$r11$r12$r10 \n\
- .err \n\
- .endif \n\
-
- ;; Save the registers we'll use in the movem process
- ;; on the stack.
- subq 11*4,$sp
- movem $r10,[$sp]
-
- ;; Now we've got this:
- ;; r11 - src
- ;; r13 - dst
- ;; r12 - n
-
- ;; Update n for the first loop
- subq 44,$r12
-0:
- movem [$r11+],$r10
-1:
- subq 44,$r12
- bge 0b
- movem $r10,[$r13+]
-
- addq 44,$r12 ;; compensate for last loop underflowing n
-
- ;; Restore registers from stack
- movem [$sp+],$r10
-4:
- .section .fixup,\"ax\"
-
-;; Do not jump back into the loop if we fail. For some uses, we get a
-;; page fault somewhere on the line. Without checking for page limits,
-;; we don't know where, but we need to copy accurately and keep an
-;; accurate count; not just clear the whole line. To do that, we fall
-;; down in the code below, proceeding with smaller amounts. It should
-;; be kept in mind that we have to cater to code like what at one time
-;; was in fs/super.c:
-;; i = size - copy_from_user((void *)page, data, size);
-;; which would cause repeated faults while clearing the remainder of
-;; the SIZE bytes at PAGE after the first fault.
-;; A caveat here is that we must not fall through from a failing page
-;; to a valid page.
-
-3:
- movem [$sp+],$r10
- addq 44,$r12 ;; Get back count before faulting point.
- subq 44,$r11 ;; Get back pointer to faulting movem-line.
- jump 4b ;; Fall through, pretending the fault didn't happen.
-
- .previous
- .section __ex_table,\"a\"
- .dword 1b,3b
- .previous"
+ __asm__ volatile (
+ ".ifnc %0%1%2%3,$r13$r11$r12$r10 \n\t"
+ ".err \n\t"
+ ".endif \n\t"
+ "subq 11*4,$sp\n\t"
+ "movem $r10,[$sp]\n\t"
+ "subq 44,$r12\n\t"
+ "0:\n\t"
+ "movem [$r11+],$r10\n\t"
+ "1:\n\t"
+ "subq 44,$r12\n\t"
+ "bge 0b\n\t"
+ "movem $r10,[$r13+]\n\t"
+ "addq 44,$r12 \n\t"
+ "movem [$sp+],$r10\n\t"
+ "4:\n\t"
+ ".section .fixup,\"ax\"\n\t"
+ "3:\n\t"
+ "movem [$sp+],$r10\n\t"
+ "addq 44,$r12\n\t"
+ "subq 44,$r11\n\t"
+ "jump 4b \n\t"
+ ".previous\n\t"
+ ".section __ex_table,\"a\"\n\t"
+ ".dword 1b,3b\n\t"
+ ".previous\n\t"
/* Outputs */ : "=r" (dst), "=r" (src), "=r" (n), "=r" (retn)
/* Inputs */ : "0" (dst), "1" (src), "2" (n), "3" (retn));
@@ -425,66 +372,50 @@
If you want to check that the allocation was right; then
check the equalities in the first comment. It should say
something like "r13=r13, r11=r11, r12=r12". */
- __asm__ volatile ("
- .ifnc %0%1%2,$r13$r12$r10 \n\
- .err \n\
- .endif \n\
-
- ;; Save the registers we'll clobber in the movem process
- ;; on the stack. Don't mention them to gcc, it will only be
- ;; upset.
- subq 11*4,$sp
- movem $r10,[$sp]
-
- clear.d $r0
- clear.d $r1
- clear.d $r2
- clear.d $r3
- clear.d $r4
- clear.d $r5
- clear.d $r6
- clear.d $r7
- clear.d $r8
- clear.d $r9
- clear.d $r10
- clear.d $r11
-
- ;; Now we've got this:
- ;; r13 - dst
- ;; r12 - n
-
- ;; Update n for the first loop
- subq 12*4,$r12
-0:
- subq 12*4,$r12
- bge 0b
- movem $r11,[$r13+]
-1:
- addq 12*4,$r12 ;; compensate for last loop underflowing n
-
- ;; Restore registers from stack
- movem [$sp+],$r10
-2:
- .section .fixup,\"ax\"
-3:
- move.d [$sp],$r10
- addq 12*4,$r10
- move.d $r10,[$sp]
- clear.d $r10
- jump 0b
-
-4:
- movem [$sp+],$r10
- addq 12*4,$r10
- addq 12*4,$r12
- jump 2b
-
- .previous
- .section __ex_table,\"a\"
- .dword 0b,3b
- .dword 1b,4b
- .previous"
-
+ __asm__ volatile (
+ ".ifnc %0%1%2,$r13$r12$r10\n\t"
+ ".err \n\t"
+ ".endif\n\t"
+ "subq 11*4,$sp\n\t"
+ "movem $r10,[$sp]\n\t"
+ "clear.d $r0\n\t"
+ "clear.d $r1\n\t"
+ "clear.d $r2\n\t"
+ "clear.d $r3\n\t"
+ "clear.d $r4\n\t"
+ "clear.d $r5\n\t"
+ "clear.d $r6\n\t"
+ "clear.d $r7\n\t"
+ "clear.d $r8\n\t"
+ "clear.d $r9\n\t"
+ "clear.d $r10\n\t"
+ "clear.d $r11\n\t"
+ "subq 12*4,$r12\n\t"
+ "0:\n\t"
+ "subq 12*4,$r12\n\t"
+ "bge 0b\n\t"
+ "movem $r11,[$r13+]\n\t"
+ "1: \n\t"
+ "addq 12*4,$r12 \n\t"
+ "movem [$sp+],$r10\n\t"
+ "2:\n\t"
+ ".section .fixup,\"ax\"\n\t"
+ "3:\n\t"
+ "move.d [$sp],$r10\n\t"
+ "addq 12*4,$r10\n\t"
+ "move.d $r10,[$sp]\n\t"
+ "clear.d $r10\n\t"
+ "jump 0b\n\t"
+ "4:\n\t"
+ "movem [$sp+],$r10\n\t"
+ "addq 12*4,$r10\n\t"
+ "addq 12*4,$r12\n\t"
+ "jump 2b\n\t"
+ ".previous\n\t"
+ ".section __ex_table,\"a\"\n\t"
+ ".dword 0b,3b\n\t"
+ ".dword 1b,4b\n\t"
+ ".previous\n\t"
/* Outputs */ : "=r" (dst), "=r" (n), "=r" (retn)
/* Inputs */ : "0" (dst), "1" (n), "2" (retn)
/* Clobber */ : "r11");
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