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powerpc: Rearrange cfi_offset calls 
This patch rearranges cfi_offset() calls after the last store
so as to avoid extra DW_CFA_advance opcodes in unwind information.
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Rajalakshmi Srinivasaraghavan authored and Tulio Magno Quites Machado Filho committed Mar 11, 2016
1 parent f60ee13 commit 869d718
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Showing 7 changed files with 44 additions and 34 deletions.
10 changes: 10 additions & 0 deletions ChangeLog
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@@ -1,3 +1,13 @@
2016-03-11 Rajalakshmi Srinivasaraghavan <raji@linux.vnet.ibm.com>

* sysdeps/powerpc/powerpc32/power4/memcmp.S (memcmp): Rearrange
cfi_offset calls.
* sysdeps/powerpc/powerpc32/power6/memcpy.S (memcpy): Likewise.
* sysdeps/powerpc/powerpc32/power7/memcmp.S (memcmp): Likewise.
* sysdeps/powerpc/powerpc64/power4/memcmp.S (memcmp): Likewise.
* sysdeps/powerpc/powerpc64/power7/memcmp.S (memcmp): Likewise.
* sysdeps/powerpc/powerpc64/power7/strstr.S (strstr): Likewise.

2016-03-10 Carlos O'Donell <carlos@redhat.com>

* timezone/checktab.awk: Removed.
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12 changes: 6 additions & 6 deletions sysdeps/powerpc/powerpc32/power4/memcmp.S
View file
Expand Up @@ -54,8 +54,8 @@ EALIGN (memcmp, 4, 0)
stwu 1, -64(r1)
cfi_adjust_cfa_offset(64)
stw rWORD8, 48(r1)
cfi_offset(rWORD8, (48-64))
stw rWORD7, 44(r1)
cfi_offset(rWORD8, (48-64))
cfi_offset(rWORD7, (44-64))
bne L(unaligned)
/* At this point we know both strings have the same alignment and the
Expand Down Expand Up @@ -747,18 +747,18 @@ L(unaligned):
the actual start of rSTR2. */
clrrwi rSTR2, rSTR2, 2
stw rWORD2_SHIFT, 28(r1)
cfi_offset(rWORD2_SHIFT, (28-64))
/* Compute the left/right shift counts for the unaligned rSTR2,
compensating for the logical (W aligned) start of rSTR1. */
clrlwi rSHL, rWORD8_SHIFT, 30
clrrwi rSTR1, rSTR1, 2
stw rWORD4_SHIFT, 24(r1)
cfi_offset(rWORD4_SHIFT, (24-64))
slwi rSHL, rSHL, 3
cmplw cr5, rWORD8_SHIFT, rSTR2
add rN, rN, r12
slwi rWORD6, r12, 3
stw rWORD6_SHIFT, 20(r1)
cfi_offset(rWORD2_SHIFT, (28-64))
cfi_offset(rWORD4_SHIFT, (24-64))
cfi_offset(rWORD6_SHIFT, (20-64))
subfic rSHR, rSHL, 32
srwi r0, rN, 4 /* Divide by 16 */
Expand Down Expand Up @@ -852,15 +852,15 @@ L(duPs4):
.align 4
L(Wunaligned):
stw rWORD8_SHIFT, 32(r1)
cfi_offset(rWORD8_SHIFT, (32-64))
clrrwi rSTR2, rSTR2, 2
stw rWORD2_SHIFT, 28(r1)
cfi_offset(rWORD2_SHIFT, (28-64))
srwi r0, rN, 4 /* Divide by 16 */
stw rWORD4_SHIFT, 24(r1)
cfi_offset(rWORD4_SHIFT, (24-64))
andi. r12, rN, 12 /* Get the W remainder */
stw rWORD6_SHIFT, 20(r1)
cfi_offset(rWORD8_SHIFT, (32-64))
cfi_offset(rWORD2_SHIFT, (28-64))
cfi_offset(rWORD4_SHIFT, (24-64))
cfi_offset(rWORD6_SHIFT, (20-64))
slwi rSHL, rSHL, 3
#ifdef __LITTLE_ENDIAN__
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2 changes: 1 addition & 1 deletion sysdeps/powerpc/powerpc32/power6/memcpy.S
View file
Expand Up @@ -46,8 +46,8 @@ EALIGN (memcpy, 5, 0)
ble- cr1,L(word_unaligned_short) /* If move < 32 bytes. */
cmplw cr6,10,11
stw 31,24(1)
cfi_offset(31,(24-32))
stw 30,20(1)
cfi_offset(31,(24-32))
cfi_offset(30,(20-32))
mr 30,3
beq .L0
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12 changes: 6 additions & 6 deletions sysdeps/powerpc/powerpc32/power7/memcmp.S
View file
Expand Up @@ -54,8 +54,8 @@ EALIGN (memcmp, 4, 0)
stwu 1, -64(r1)
cfi_adjust_cfa_offset(64)
stw rWORD8, 48(r1)
cfi_offset(rWORD8, (48-64))
stw rWORD7, 44(r1)
cfi_offset(rWORD8, (48-64))
cfi_offset(rWORD7, (44-64))
bne L(unaligned)
/* At this point we know both strings have the same alignment and the
Expand Down Expand Up @@ -747,18 +747,18 @@ L(unaligned):
the actual start of rSTR2. */
clrrwi rSTR2, rSTR2, 2
stw rWORD2_SHIFT, 28(r1)
cfi_offset(rWORD2_SHIFT, (28-64))
/* Compute the left/right shift counts for the unaligned rSTR2,
compensating for the logical (W aligned) start of rSTR1. */
clrlwi rSHL, rWORD8_SHIFT, 30
clrrwi rSTR1, rSTR1, 2
stw rWORD4_SHIFT, 24(r1)
cfi_offset(rWORD4_SHIFT, (24-64))
slwi rSHL, rSHL, 3
cmplw cr5, rWORD8_SHIFT, rSTR2
add rN, rN, r12
slwi rWORD6, r12, 3
stw rWORD6_SHIFT, 20(r1)
cfi_offset(rWORD2_SHIFT, (28-64))
cfi_offset(rWORD4_SHIFT, (24-64))
cfi_offset(rWORD6_SHIFT, (20-64))
subfic rSHR, rSHL, 32
srwi r0, rN, 4 /* Divide by 16 */
Expand Down Expand Up @@ -852,15 +852,15 @@ L(duPs4):
.align 4
L(Wunaligned):
stw rWORD8_SHIFT, 32(r1)
cfi_offset(rWORD8_SHIFT, (32-64))
clrrwi rSTR2, rSTR2, 2
stw rWORD2_SHIFT, 28(r1)
cfi_offset(rWORD2_SHIFT, (28-64))
srwi r0, rN, 4 /* Divide by 16 */
stw rWORD4_SHIFT, 24(r1)
cfi_offset(rWORD4_SHIFT, (24-64))
andi. r12, rN, 12 /* Get the W remainder */
stw rWORD6_SHIFT, 20(r1)
cfi_offset(rWORD8_SHIFT, (32-64))
cfi_offset(rWORD2_SHIFT, (28-64))
cfi_offset(rWORD4_SHIFT, (24-64))
cfi_offset(rWORD6_SHIFT, (20-64))
slwi rSHL, rSHL, 3
#ifdef __LITTLE_ENDIAN__
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12 changes: 6 additions & 6 deletions sysdeps/powerpc/powerpc64/power4/memcmp.S
View file
Expand Up @@ -52,8 +52,8 @@ EALIGN (memcmp, 4, 0)
byte loop. */
blt cr1, L(bytealigned)
std rWORD8, -8(r1)
cfi_offset(rWORD8, -8)
std rWORD7, -16(r1)
cfi_offset(rWORD8, -8)
cfi_offset(rWORD7, -16)
bne L(unaligned)
/* At this point we know both strings have the same alignment and the
Expand Down Expand Up @@ -728,18 +728,18 @@ L(unaligned):
the actual start of rSTR2. */
clrrdi rSTR2, rSTR2, 3
std rWORD2_SHIFT, -48(r1)
cfi_offset(rWORD2_SHIFT, -48)
/* Compute the left/right shift counts for the unaligned rSTR2,
compensating for the logical (DW aligned) start of rSTR1. */
clrldi rSHL, rWORD8_SHIFT, 61
clrrdi rSTR1, rSTR1, 3
std rWORD4_SHIFT, -56(r1)
cfi_offset(rWORD4_SHIFT, -56)
sldi rSHL, rSHL, 3
cmpld cr5, rWORD8_SHIFT, rSTR2
add rN, rN, r12
sldi rWORD6, r12, 3
std rWORD6_SHIFT, -64(r1)
cfi_offset(rWORD2_SHIFT, -48)
cfi_offset(rWORD4_SHIFT, -56)
cfi_offset(rWORD6_SHIFT, -64)
subfic rSHR, rSHL, 64
srdi r0, rN, 5 /* Divide by 32 */
Expand Down Expand Up @@ -833,15 +833,15 @@ L(duPs4):
.align 4
L(DWunaligned):
std rWORD8_SHIFT, -40(r1)
cfi_offset(rWORD8_SHIFT, -40)
clrrdi rSTR2, rSTR2, 3
std rWORD2_SHIFT, -48(r1)
cfi_offset(rWORD2_SHIFT, -48)
srdi r0, rN, 5 /* Divide by 32 */
std rWORD4_SHIFT, -56(r1)
cfi_offset(rWORD4_SHIFT, -56)
andi. r12, rN, 24 /* Get the DW remainder */
std rWORD6_SHIFT, -64(r1)
cfi_offset(rWORD8_SHIFT, -40)
cfi_offset(rWORD2_SHIFT, -48)
cfi_offset(rWORD4_SHIFT, -56)
cfi_offset(rWORD6_SHIFT, -64)
sldi rSHL, rSHL, 3
#ifdef __LITTLE_ENDIAN__
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22 changes: 11 additions & 11 deletions sysdeps/powerpc/powerpc64/power7/memcmp.S
View file
Expand Up @@ -82,17 +82,17 @@ EALIGN (memcmp, 4, 0)
byte loop. */
blt cr1, L(bytealigned)
std rWORD8, rWORD8SAVE(r1)
cfi_offset(rWORD8, rWORD8SAVE)
std rWORD7, rWORD7SAVE(r1)
cfi_offset(rWORD7, rWORD7SAVE)
std rOFF8, rOFF8SAVE(r1)
cfi_offset(rWORD7, rOFF8SAVE)
std rOFF16, rOFF16SAVE(r1)
cfi_offset(rWORD7, rOFF16SAVE)
std rOFF24, rOFF24SAVE(r1)
cfi_offset(rWORD7, rOFF24SAVE)
std rOFF32, rOFF32SAVE(r1)
cfi_offset(rWORD7, rOFF32SAVE)
cfi_offset(rWORD8, rWORD8SAVE)
cfi_offset(rWORD7, rWORD7SAVE)
cfi_offset(rOFF8, rOFF8SAVE)
cfi_offset(rOFF16, rOFF16SAVE)
cfi_offset(rOFF24, rOFF24SAVE)
cfi_offset(rOFF32, rOFF32SAVE)

li rOFF8,8
li rOFF16,16
Expand Down Expand Up @@ -601,18 +601,18 @@ L(unaligned):
the actual start of rSTR2. */
clrrdi rSTR2, rSTR2, 3
std rWORD2_SHIFT, rWORD2SHIFTSAVE(r1)
cfi_offset(rWORD2_SHIFT, rWORD2SHIFTSAVE)
/* Compute the left/right shift counts for the unaligned rSTR2,
compensating for the logical (DW aligned) start of rSTR1. */
clrldi rSHL, rWORD8_SHIFT, 61
clrrdi rSTR1, rSTR1, 3
std rWORD4_SHIFT, rWORD4SHIFTSAVE(r1)
cfi_offset(rWORD4_SHIFT, rWORD4SHIFTSAVE)
sldi rSHL, rSHL, 3
cmpld cr5, rWORD8_SHIFT, rSTR2
add rN, rN, r12
sldi rWORD6, r12, 3
std rWORD6_SHIFT, rWORD6SHIFTSAVE(r1)
cfi_offset(rWORD2_SHIFT, rWORD2SHIFTSAVE)
cfi_offset(rWORD4_SHIFT, rWORD4SHIFTSAVE)
cfi_offset(rWORD6_SHIFT, rWORD6SHIFTSAVE)
subfic rSHR, rSHL, 64
srdi r0, rN, 5 /* Divide by 32 */
Expand Down Expand Up @@ -689,15 +689,15 @@ L(duPs4):
.align 4
L(DWunaligned):
std rWORD8_SHIFT, rWORD8SHIFTSAVE(r1)
cfi_offset(rWORD8_SHIFT, rWORD8SHIFTSAVE)
clrrdi rSTR2, rSTR2, 3
std rWORD2_SHIFT, rWORD2SHIFTSAVE(r1)
cfi_offset(rWORD2_SHIFT, rWORD2SHIFTSAVE)
srdi r0, rN, 5 /* Divide by 32 */
std rWORD4_SHIFT, rWORD4SHIFTSAVE(r1)
cfi_offset(rWORD4_SHIFT, rWORD4SHIFTSAVE)
andi. r12, rN, 24 /* Get the DW remainder */
std rWORD6_SHIFT, rWORD6SHIFTSAVE(r1)
cfi_offset(rWORD8_SHIFT, rWORD8SHIFTSAVE)
cfi_offset(rWORD2_SHIFT, rWORD2SHIFTSAVE)
cfi_offset(rWORD4_SHIFT, rWORD4SHIFTSAVE)
cfi_offset(rWORD6_SHIFT, rWORD6SHIFTSAVE)
sldi rSHL, rSHL, 3
LD rWORD6, 0, rSTR2
Expand Down
8 changes: 4 additions & 4 deletions sysdeps/powerpc/powerpc64/power7/strstr.S
View file
Expand Up @@ -59,14 +59,14 @@ EALIGN (strstr, 4, 0)
CALL_MCOUNT 2
mflr r0 /* Load link register LR to r0. */
std r31, -8(r1) /* Save callers register r31. */
cfi_offset(r31, -8)
std r30, -16(r1) /* Save callers register r30. */
cfi_offset(r30, -16)
std r29, -24(r1) /* Save callers register r29. */
cfi_offset(r29, -24)
std r28, -32(r1) /* Save callers register r28. */
cfi_offset(r28, -32)
std r0, 16(r1) /* Store the link register. */
cfi_offset(r31, -8)
cfi_offset(r30, -16)
cfi_offset(r28, -32)
cfi_offset(r29, -24)
cfi_offset(lr, 16)
stdu r1, -FRAMESIZE(r1) /* Create the stack frame. */
cfi_adjust_cfa_offset(FRAMESIZE)
Expand Down

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