/* Optimized strcmp implementation for PowerPC64.
- Copyright (C) 1997, 1999, 2000, 2002 Free Software Foundation, Inc.
+ Copyright (C) 1997, 1999, 2000, 2002, 2003 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
#define rRTN r3
#define rSTR1 r3 /* first string arg */
#define rSTR2 r4 /* second string arg */
+/* Note: The Bounded pointer support in this code is broken. This code
+ was inherited from PPC32 and and that support was never completed.
+ Current PPC gcc does not support -fbounds-check or -fbounded-pointers.
+ These artifacts are left in the code as a reminder in case we need
+ bounded pointer support in the future. */
#if __BOUNDED_POINTERS__
# define rHIGH1 r11
# define rHIGH2 r12
#endif
#define rWORD1 r5 /* current word in s1 */
#define rWORD2 r6 /* current word in s2 */
-#define rFEFE r7 /* constant 0xfefefeff (-0x01010101) */
-#define r7F7F r8 /* constant 0x7f7f7f7f */
-#define rNEG r9 /* ~(word in s1 | 0x7f7f7f7f) */
+#define rFEFE r7 /* constant 0xfefefefefefefeff (-0x0101010101010101) */
+#define r7F7F r8 /* constant 0x7f7f7f7f7f7f7f7f */
+#define rNEG r9 /* ~(word in s1 | 0x7f7f7f7f7f7f7f7f) */
#define rBITDIF r10 /* bits that differ in s1 & s2 words */
CHECK_BOUNDS_LOW (rSTR1, rTMP, rHIGH1)
CHECK_BOUNDS_LOW (rSTR2, rTMP, rHIGH2)
+ dcbt 0,rSTR1
or rTMP, rSTR2, rSTR1
- clrldi. rTMP, rTMP, 62
+ dcbt 0,rSTR2
+ clrldi. rTMP, rTMP, 61
lis rFEFE, -0x101
bne L(unaligned)
- lwz rWORD1, 0(rSTR1)
- lwz rWORD2, 0(rSTR2)
+ ld rWORD1, 0(rSTR1)
+ ld rWORD2, 0(rSTR2)
lis r7F7F, 0x7f7f
addi rFEFE, rFEFE, -0x101
- clrldi rFEFE,rFEFE,32 /* clear upper 32 */
addi r7F7F, r7F7F, 0x7f7f
+ sldi rTMP, rFEFE, 32
+ insrdi r7F7F, r7F7F, 32, 0
+ add rFEFE, rFEFE, rTMP
b L(g1)
-L(g0): lwzu rWORD1, 4(rSTR1)
+L(g0): ldu rWORD1, 8(rSTR1)
bne cr1, L(different)
- lwzu rWORD2, 4(rSTR2)
+ ldu rWORD2, 8(rSTR2)
L(g1): add rTMP, rFEFE, rWORD1
nor rNEG, r7F7F, rWORD1
- clrldi rNEG,rNEG,32 /* clear upper 32 */
and. rTMP, rTMP, rNEG
- cmpw cr1, rWORD1, rWORD2
+ cmpd cr1, rWORD1, rWORD2
beq+ L(g0)
L(endstring):
/* OK. We've hit the end of the string. We need to be careful that
add rTMP, rTMP, r7F7F
xor. rBITDIF, rWORD1, rWORD2
- extsw. rBITDIF,rBITDIF /* propagate sign for blt */
andc rNEG, rNEG, rTMP
blt- L(highbit)
- cntlzw rBITDIF, rBITDIF
- cntlzw rNEG, rNEG
+ cntlzd rBITDIF, rBITDIF
+ cntlzd rNEG, rNEG
addi rNEG, rNEG, 7
- cmpw cr1, rNEG, rBITDIF
+ cmpd cr1, rNEG, rBITDIF
sub rRTN, rWORD1, rWORD2
- extsw rRTN, rRTN
- bgelr+ cr1
+ blt- cr1, L(equal)
+ sradi rRTN, rRTN, 63
+ ori rRTN, rRTN, 1
+ blr
L(equal):
li rRTN, 0
/* GKM FIXME: check high bounds. */
blr
L(different):
- lwz rWORD1, -4(rSTR1)
+ ld rWORD1, -8(rSTR1)
xor. rBITDIF, rWORD1, rWORD2
-
- extsw. rBITDIF,rBITDIF /* propagate sign for bgelr */
sub rRTN, rWORD1, rWORD2
- extsw rRTN, rRTN
- bgelr+
+ blt- L(highbit)
+ sradi rRTN, rRTN, 63
+ ori rRTN, rRTN, 1
+ blr
L(highbit):
- ori rRTN, rWORD2, 1
- extsw rRTN, rRTN
+ srdi rWORD2, rWORD2, 56
+ srdi rWORD1, rWORD1, 56
+ sub rRTN, rWORD1, rWORD2
/* GKM FIXME: check high bounds. */
blr
lbzu rWORD2, 1(rSTR2)
L(u1): cmpwi cr1, rWORD1, 0
beq- cr1, L(u3)
- cmpw rWORD1, rWORD2
+ cmpd rWORD1, rWORD2
bne- L(u3)
lbzu rWORD1, 1(rSTR1)
lbzu rWORD2, 1(rSTR2)
- cmpwi cr1, rWORD1, 0
- cmpw rWORD1, rWORD2
+ cmpdi cr1, rWORD1, 0
+ cmpd rWORD1, rWORD2
bne+ cr1, L(u0)
L(u3): sub rRTN, rWORD1, rWORD2
- extsw rRTN, rRTN
/* GKM FIXME: check high bounds. */
blr
L(u4): lbz rWORD1, -1(rSTR1)
sub rRTN, rWORD1, rWORD2
- extsw rRTN, rRTN
/* GKM FIXME: check high bounds. */
blr
END (BP_SYM (strcmp))
/* Optimized strcpy implementation for PowerPC64.
- Copyright (C) 1997, 1999, 2000, 2002 Free Software Foundation, Inc.
+ Copyright (C) 1997, 1999, 2000, 2002, 2003 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
#define rTMP r0
#define rRTN r3 /* incoming DEST arg preserved as result */
+/* Note. The Bounded pointer support in this code is broken. This code
+ was inherited from PPC32 and and that support was never completed.
+ Current PPC gcc does not support -fbounds-check or -fbounded-pointers.
+ These artifacts are left in the code as a reminder in case we need
+ bounded pointer support in the future. */
#if __BOUNDED_POINTERS__
# define rDEST r4 /* pointer to previous word in dest */
# define rSRC r5 /* pointer to previous word in src */
# define rDEST r5 /* pointer to previous word in dest */
#endif
#define rWORD r6 /* current word from src */
-#define rFEFE r7 /* constant 0xfefefeff (-0x01010101) */
-#define r7F7F r8 /* constant 0x7f7f7f7f */
-#define rNEG r9 /* ~(word in s1 | 0x7f7f7f7f) */
+#define rFEFE r7 /* constant 0xfefefefefefefeff (-0x0101010101010101) */
+#define r7F7F r8 /* constant 0x7f7f7f7f7f7f7f7f */
+#define rNEG r9 /* ~(word in s1 | 0x7f7f7f7f7f7f7f7f) */
#define rALT r10 /* alternate word from src */
CHECK_BOUNDS_LOW (rSRC, rLOW, rHIGH)
CHECK_BOUNDS_LOW (rDEST, rLOW, rHIGH)
STORE_RETURN_BOUNDS (rLOW, rHIGH)
+ dcbt 0,rSRC
or rTMP, rSRC, rRTN
- clrldi. rTMP, rTMP, 62
+ clrldi. rTMP, rTMP, 61
#if __BOUNDED_POINTERS__
- addi rDEST, rDEST, -4
+ addi rDEST, rDEST, -8
#else
- addi rDEST, rRTN, -4
+ addi rDEST, rRTN, -8
#endif
+ dcbtst 0,rRTN
bne L(unaligned)
lis rFEFE, -0x101
lis r7F7F, 0x7f7f
- lwz rWORD, 0(rSRC)
+ ld rWORD, 0(rSRC)
addi rFEFE, rFEFE, -0x101
addi r7F7F, r7F7F, 0x7f7f
+ sldi rTMP, rFEFE, 32
+ insrdi r7F7F, r7F7F, 32, 0
+ add rFEFE, rFEFE, rTMP
b L(g2)
-L(g0): lwzu rALT, 4(rSRC)
- stwu rWORD, 4(rDEST)
+L(g0): ldu rALT, 8(rSRC)
+ stdu rWORD, 8(rDEST)
add rTMP, rFEFE, rALT
nor rNEG, r7F7F, rALT
and. rTMP, rTMP, rNEG
bne- L(g1)
- lwzu rWORD, 4(rSRC)
- stwu rALT, 4(rDEST)
+ ldu rWORD, 8(rSRC)
+ stdu rALT, 8(rDEST)
L(g2): add rTMP, rFEFE, rWORD
nor rNEG, r7F7F, rWORD
and. rTMP, rTMP, rNEG
mr rALT, rWORD
/* We've hit the end of the string. Do the rest byte-by-byte. */
-L(g1): rlwinm. rTMP, rALT, 8, 24, 31
- stb rTMP, 4(rDEST)
+L(g1):
+ extrdi. rTMP, rALT, 8, 0
+ stb rTMP, 8(rDEST)
beqlr-
- rlwinm. rTMP, rALT, 16, 24, 31
- stb rTMP, 5(rDEST)
+ extrdi. rTMP, rALT, 8, 8
+ stb rTMP, 9(rDEST)
beqlr-
- rlwinm. rTMP, rALT, 24, 24, 31
- stb rTMP, 6(rDEST)
+ extrdi. rTMP, rALT, 8, 16
+ stb rTMP, 10(rDEST)
beqlr-
- stb rALT, 7(rDEST)
+ extrdi. rTMP, rALT, 8, 24
+ stb rTMP, 11(rDEST)
+ beqlr-
+ extrdi. rTMP, rALT, 8, 32
+ stb rTMP, 12(rDEST)
+ beqlr-
+ extrdi. rTMP, rALT, 8, 40
+ stb rTMP, 13(rDEST)
+ beqlr-
+ extrdi. rTMP, rALT, 8, 48
+ stb rTMP, 14(rDEST)
+ beqlr-
+ stb rALT, 15(rDEST)
/* GKM FIXME: check high bound. */
blr
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