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Update.
2003-04-15 Steven Munroe <sjmunroe@us.ibm.com> * sysdeps/powerpc/powerpc64/strcmp.S: Convert to full 64-bit. * sysdeps/powerpc/powerpc64/strcpy.S: Likewise.
This commit is contained in:
Ulrich Drepper
parent
aa3f24108d
commit
482eb33c43
@ -1,3 +1,8 @@
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2003-04-15 Steven Munroe <sjmunroe@us.ibm.com>
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* sysdeps/powerpc/powerpc64/strcmp.S: Convert to full 64-bit.
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* sysdeps/powerpc/powerpc64/strcpy.S: Likewise.
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2003-04-15 Jakub Jelinek <jakub@redhat.com>
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* sysdeps/powerpc/powerpc32/dl-machine.h (elf_machine_rela): Avoid
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@ -1,5 +1,5 @@
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/* Optimized strcmp implementation for PowerPC64.
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Copyright (C) 1997, 1999, 2000, 2002 Free Software Foundation, Inc.
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Copyright (C) 1997, 1999, 2000, 2002, 2003 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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@ -31,42 +31,50 @@ EALIGN (BP_SYM(strcmp), 4, 0)
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#define rRTN r3
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#define rSTR1 r3 /* first string arg */
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#define rSTR2 r4 /* second string arg */
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/* Note: The Bounded pointer support in this code is broken. This code
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was inherited from PPC32 and and that support was never completed.
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Current PPC gcc does not support -fbounds-check or -fbounded-pointers.
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These artifacts are left in the code as a reminder in case we need
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bounded pointer support in the future. */
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#if __BOUNDED_POINTERS__
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# define rHIGH1 r11
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# define rHIGH2 r12
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#endif
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#define rWORD1 r5 /* current word in s1 */
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#define rWORD2 r6 /* current word in s2 */
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#define rFEFE r7 /* constant 0xfefefeff (-0x01010101) */
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#define r7F7F r8 /* constant 0x7f7f7f7f */
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#define rNEG r9 /* ~(word in s1 | 0x7f7f7f7f) */
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#define rFEFE r7 /* constant 0xfefefefefefefeff (-0x0101010101010101) */
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#define r7F7F r8 /* constant 0x7f7f7f7f7f7f7f7f */
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#define rNEG r9 /* ~(word in s1 | 0x7f7f7f7f7f7f7f7f) */
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#define rBITDIF r10 /* bits that differ in s1 & s2 words */
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CHECK_BOUNDS_LOW (rSTR1, rTMP, rHIGH1)
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CHECK_BOUNDS_LOW (rSTR2, rTMP, rHIGH2)
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dcbt 0,rSTR1
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or rTMP, rSTR2, rSTR1
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clrldi. rTMP, rTMP, 62
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dcbt 0,rSTR2
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clrldi. rTMP, rTMP, 61
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lis rFEFE, -0x101
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bne L(unaligned)
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lwz rWORD1, 0(rSTR1)
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lwz rWORD2, 0(rSTR2)
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ld rWORD1, 0(rSTR1)
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ld rWORD2, 0(rSTR2)
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lis r7F7F, 0x7f7f
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addi rFEFE, rFEFE, -0x101
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clrldi rFEFE,rFEFE,32 /* clear upper 32 */
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addi r7F7F, r7F7F, 0x7f7f
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sldi rTMP, rFEFE, 32
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insrdi r7F7F, r7F7F, 32, 0
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add rFEFE, rFEFE, rTMP
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b L(g1)
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L(g0): lwzu rWORD1, 4(rSTR1)
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L(g0): ldu rWORD1, 8(rSTR1)
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bne cr1, L(different)
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lwzu rWORD2, 4(rSTR2)
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ldu rWORD2, 8(rSTR2)
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L(g1): add rTMP, rFEFE, rWORD1
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nor rNEG, r7F7F, rWORD1
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clrldi rNEG,rNEG,32 /* clear upper 32 */
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and. rTMP, rTMP, rNEG
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cmpw cr1, rWORD1, rWORD2
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cmpd cr1, rWORD1, rWORD2
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beq+ L(g0)
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L(endstring):
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/* OK. We've hit the end of the string. We need to be careful that
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@ -77,32 +85,34 @@ L(endstring):
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add rTMP, rTMP, r7F7F
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xor. rBITDIF, rWORD1, rWORD2
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extsw. rBITDIF,rBITDIF /* propagate sign for blt */
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andc rNEG, rNEG, rTMP
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blt- L(highbit)
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cntlzw rBITDIF, rBITDIF
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cntlzw rNEG, rNEG
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cntlzd rBITDIF, rBITDIF
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cntlzd rNEG, rNEG
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addi rNEG, rNEG, 7
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cmpw cr1, rNEG, rBITDIF
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cmpd cr1, rNEG, rBITDIF
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sub rRTN, rWORD1, rWORD2
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extsw rRTN, rRTN
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bgelr+ cr1
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blt- cr1, L(equal)
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sradi rRTN, rRTN, 63
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ori rRTN, rRTN, 1
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blr
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L(equal):
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li rRTN, 0
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/* GKM FIXME: check high bounds. */
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blr
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L(different):
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lwz rWORD1, -4(rSTR1)
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ld rWORD1, -8(rSTR1)
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xor. rBITDIF, rWORD1, rWORD2
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extsw. rBITDIF,rBITDIF /* propagate sign for bgelr */
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sub rRTN, rWORD1, rWORD2
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extsw rRTN, rRTN
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bgelr+
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blt- L(highbit)
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sradi rRTN, rRTN, 63
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ori rRTN, rRTN, 1
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blr
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L(highbit):
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ori rRTN, rWORD2, 1
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extsw rRTN, rRTN
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srdi rWORD2, rWORD2, 56
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srdi rWORD1, rWORD1, 56
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sub rRTN, rWORD1, rWORD2
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/* GKM FIXME: check high bounds. */
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blr
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@ -119,20 +129,18 @@ L(u0): lbzu rWORD1, 1(rSTR1)
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lbzu rWORD2, 1(rSTR2)
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L(u1): cmpwi cr1, rWORD1, 0
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beq- cr1, L(u3)
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cmpw rWORD1, rWORD2
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cmpd rWORD1, rWORD2
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bne- L(u3)
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lbzu rWORD1, 1(rSTR1)
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lbzu rWORD2, 1(rSTR2)
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cmpwi cr1, rWORD1, 0
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cmpw rWORD1, rWORD2
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cmpdi cr1, rWORD1, 0
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cmpd rWORD1, rWORD2
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bne+ cr1, L(u0)
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L(u3): sub rRTN, rWORD1, rWORD2
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extsw rRTN, rRTN
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/* GKM FIXME: check high bounds. */
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blr
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L(u4): lbz rWORD1, -1(rSTR1)
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sub rRTN, rWORD1, rWORD2
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extsw rRTN, rRTN
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/* GKM FIXME: check high bounds. */
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blr
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END (BP_SYM (strcmp))
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@ -1,5 +1,5 @@
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/* Optimized strcpy implementation for PowerPC64.
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Copyright (C) 1997, 1999, 2000, 2002 Free Software Foundation, Inc.
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Copyright (C) 1997, 1999, 2000, 2002, 2003 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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@ -29,6 +29,11 @@ EALIGN (BP_SYM (strcpy), 4, 0)
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#define rTMP r0
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#define rRTN r3 /* incoming DEST arg preserved as result */
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/* Note. The Bounded pointer support in this code is broken. This code
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was inherited from PPC32 and and that support was never completed.
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Current PPC gcc does not support -fbounds-check or -fbounded-pointers.
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These artifacts are left in the code as a reminder in case we need
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bounded pointer support in the future. */
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#if __BOUNDED_POINTERS__
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# define rDEST r4 /* pointer to previous word in dest */
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# define rSRC r5 /* pointer to previous word in src */
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@ -39,39 +44,44 @@ EALIGN (BP_SYM (strcpy), 4, 0)
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# define rDEST r5 /* pointer to previous word in dest */
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#endif
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#define rWORD r6 /* current word from src */
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#define rFEFE r7 /* constant 0xfefefeff (-0x01010101) */
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#define r7F7F r8 /* constant 0x7f7f7f7f */
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#define rNEG r9 /* ~(word in s1 | 0x7f7f7f7f) */
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#define rFEFE r7 /* constant 0xfefefefefefefeff (-0x0101010101010101) */
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#define r7F7F r8 /* constant 0x7f7f7f7f7f7f7f7f */
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#define rNEG r9 /* ~(word in s1 | 0x7f7f7f7f7f7f7f7f) */
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#define rALT r10 /* alternate word from src */
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CHECK_BOUNDS_LOW (rSRC, rLOW, rHIGH)
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CHECK_BOUNDS_LOW (rDEST, rLOW, rHIGH)
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STORE_RETURN_BOUNDS (rLOW, rHIGH)
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dcbt 0,rSRC
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or rTMP, rSRC, rRTN
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clrldi. rTMP, rTMP, 62
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clrldi. rTMP, rTMP, 61
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#if __BOUNDED_POINTERS__
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addi rDEST, rDEST, -4
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addi rDEST, rDEST, -8
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#else
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addi rDEST, rRTN, -4
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addi rDEST, rRTN, -8
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#endif
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dcbtst 0,rRTN
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bne L(unaligned)
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lis rFEFE, -0x101
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lis r7F7F, 0x7f7f
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lwz rWORD, 0(rSRC)
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ld rWORD, 0(rSRC)
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addi rFEFE, rFEFE, -0x101
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addi r7F7F, r7F7F, 0x7f7f
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sldi rTMP, rFEFE, 32
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insrdi r7F7F, r7F7F, 32, 0
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add rFEFE, rFEFE, rTMP
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b L(g2)
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L(g0): lwzu rALT, 4(rSRC)
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stwu rWORD, 4(rDEST)
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L(g0): ldu rALT, 8(rSRC)
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stdu rWORD, 8(rDEST)
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add rTMP, rFEFE, rALT
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nor rNEG, r7F7F, rALT
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and. rTMP, rTMP, rNEG
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bne- L(g1)
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lwzu rWORD, 4(rSRC)
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stwu rALT, 4(rDEST)
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ldu rWORD, 8(rSRC)
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stdu rALT, 8(rDEST)
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L(g2): add rTMP, rFEFE, rWORD
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nor rNEG, r7F7F, rWORD
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and. rTMP, rTMP, rNEG
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@ -79,16 +89,29 @@ L(g2): add rTMP, rFEFE, rWORD
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mr rALT, rWORD
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/* We've hit the end of the string. Do the rest byte-by-byte. */
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L(g1): rlwinm. rTMP, rALT, 8, 24, 31
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stb rTMP, 4(rDEST)
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L(g1):
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extrdi. rTMP, rALT, 8, 0
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stb rTMP, 8(rDEST)
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beqlr-
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rlwinm. rTMP, rALT, 16, 24, 31
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stb rTMP, 5(rDEST)
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extrdi. rTMP, rALT, 8, 8
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stb rTMP, 9(rDEST)
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beqlr-
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rlwinm. rTMP, rALT, 24, 24, 31
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stb rTMP, 6(rDEST)
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extrdi. rTMP, rALT, 8, 16
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stb rTMP, 10(rDEST)
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beqlr-
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stb rALT, 7(rDEST)
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extrdi. rTMP, rALT, 8, 24
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stb rTMP, 11(rDEST)
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beqlr-
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extrdi. rTMP, rALT, 8, 32
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stb rTMP, 12(rDEST)
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beqlr-
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extrdi. rTMP, rALT, 8, 40
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stb rTMP, 13(rDEST)
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beqlr-
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extrdi. rTMP, rALT, 8, 48
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stb rTMP, 14(rDEST)
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beqlr-
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stb rALT, 15(rDEST)
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/* GKM FIXME: check high bound. */
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blr
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