a9a5870d16
This uses the new strcmp.a15.S code as the basis for new versions of strcmp.S. The cortex-a15 code is the performance optimized version of strcmp.a15.S taken with only the addition of a few pld instructions. The cortex-a9 code is the same as the cortex-a15 code except that the unaligned strcmp code was taken from the original strcmp.S. The krait code is the same as the cortex-a15 code except that one path in the unaligned strcmp code was taken from the original strcmp.S code (the 2 byte overlap case). The generic code is the original unmodified strmp.S from the bionic subdirectory. All three new versions underwent these test cases: Strings the same, all same size: - Both pointers double word aligned. - One pointer double word aligned, one pointer word aligned. - Both pointers word aligned. - One pointer double word aligned, one pointer 1 off a word alignment. - One pointer double word aligned, one pointer 2 off a word alignment. - One pointer double word aligned, one pointer 3 off a word alignment. - One pointer word aligned, one pointer 1 off a word alignment. - One pointer word aligned, one pointer 2 off a word alignment. - One pointer word aligned, one pointer 3 off a word alignment. For all cases where it made sense, the two pointers were also tested swapped. Different strings, all same size: - Single difference at double word boundary. - Single difference at word boudary. - Single difference at 1 off a word alignment. - Single difference at 2 off a word alignment. - Single difference at 3 off a word alignment. Different sized strings, strings the same until the end: - Shorter string ends on a double word boundary. - Shorter string ends on word boundary. - Shorter string ends at 1 off a word boundary. - Shorter string ends at 2 off a word boundary. - Shorter string ends at 3 off a word boundary. For all different cases, run them through the same pointer alignment cases when the strings are the same size. For all cases the two pointers were also tested swapped. Bug: 8005082 Change-Id: I5f3dc02b48afba2cb9c13332ab45c828ff171a1c
36 lines
1.3 KiB
Makefile
36 lines
1.3 KiB
Makefile
_LIBC_ARCH_COMMON_SRC_FILES := \
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arch-arm/bionic/abort_arm.S \
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arch-arm/bionic/atomics_arm.c \
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arch-arm/bionic/clone.S \
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arch-arm/bionic/eabi.c \
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arch-arm/bionic/_exit_with_stack_teardown.S \
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arch-arm/bionic/ffs.S \
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arch-arm/bionic/futex_arm.S \
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arch-arm/bionic/__get_sp.S \
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arch-arm/bionic/kill.S \
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arch-arm/bionic/libgcc_compat.c \
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arch-arm/bionic/memcmp16.S \
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arch-arm/bionic/memcmp.S \
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arch-arm/bionic/_setjmp.S \
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arch-arm/bionic/setjmp.S \
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arch-arm/bionic/sigsetjmp.S \
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arch-arm/bionic/strcpy.S \
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arch-arm/bionic/strlen.c.arm \
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arch-arm/bionic/syscall.S \
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arch-arm/bionic/tgkill.S \
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arch-arm/bionic/tkill.S \
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# These are used by the static and dynamic versions of the libc
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# respectively.
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_LIBC_ARCH_STATIC_SRC_FILES := \
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arch-arm/bionic/exidx_static.c
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_LIBC_ARCH_DYNAMIC_SRC_FILES := \
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arch-arm/bionic/exidx_dynamic.c
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ifeq ($(strip $(wildcard bionic/libc/arch-arm/$(TARGET_CPU_VARIANT)/$(TARGET_CPU_VARIANT).mk)),)
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$(error "TARGET_CPU_VARIANT not set or set to an unknown value. Possible values are cortex-a9, cortex-a15, krait. Use generic for devices that do not have a CPU similar to any of the supported cpu variants.")
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endif
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include bionic/libc/arch-arm/$(TARGET_CPU_VARIANT)/$(TARGET_CPU_VARIANT).mk
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