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| author | Eugen Wissner <belka@caraus.de> | 2018-10-02 08:55:29 +0200 |
|---|---|---|
| committer | Eugen Wissner <belka@caraus.de> | 2018-10-02 08:55:29 +0200 |
| commit | 772e87739c848a10a014d3118ff14bd0ca48b2d0 (patch) | |
| tree | b567a3c6fb03d45fb7048632bdb66501e42e65d8 /arch | |
| parent | 2a90a812db53728d29a3a821cb292c032437d806 (diff) | |
| download | tanya-772e87739c848a10a014d3118ff14bd0ca48b2d0.tar.gz | |
Replace memory.op.cmp with optimized equal version
Deprecate cmp.
Fix #68.
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/build.ninja | 4 | ||||
| -rw-r--r-- | arch/x64/linux/memory/equal.S (renamed from arch/x64/linux/memory/cmp.S) | 30 |
2 files changed, 13 insertions, 21 deletions
diff --git a/arch/build.ninja b/arch/build.ninja index 824efa4..cf05696 100644 --- a/arch/build.ninja +++ b/arch/build.ninja @@ -6,9 +6,9 @@ rule archive build abs.o: gas x64/linux/math/abs.S build log.o: gas x64/linux/math/log.S -build cmp.o: gas x64/linux/memory/cmp.S +build equal.o: gas x64/linux/memory/equal.S build fill.o: gas x64/linux/memory/fill.S build copy.o: gas x64/linux/memory/copy.S build syscall.o: gas x64/linux/syscall.S -build tanya.a: archive syscall.o copy.o fill.o cmp.o log.o abs.o +build tanya.a: archive syscall.o copy.o fill.o equal.o log.o abs.o diff --git a/arch/x64/linux/memory/cmp.S b/arch/x64/linux/memory/equal.S index bd9f02e..37a906a 100644 --- a/arch/x64/linux/memory/cmp.S +++ b/arch/x64/linux/memory/equal.S @@ -1,20 +1,19 @@ .text /* - * cmpMemory. + * equalMemory. * * rdi - r1 length * rsi - r1 data. * rdx - r2 length. * rcx - r2 data. */ - .globl _D5tanya6memory2op9cmpMemoryFNaNbNixAvxQdZi - .type _D5tanya6memory2op9cmpMemoryFNaNbNixAvxQdZi, @function -_D5tanya6memory2op9cmpMemoryFNaNbNixAvxQdZi: + .globl _D5tanya6memory2op11equalMemoryFNaNbNixAvxQdZb + .type _D5tanya6memory2op11equalMemoryFNaNbNixAvxQdZb, @function +_D5tanya6memory2op11equalMemoryFNaNbNixAvxQdZb: // Compare the lengths cmp %rdx, %rdi - jl less - jg greater + jne not_equal mov %rcx, %rdi @@ -26,8 +25,7 @@ _D5tanya6memory2op9cmpMemoryFNaNbNixAvxQdZi: naligned: cmpsb - jl less - jg greater + jne not_equal dec %rdx test $0x07, %edi @@ -38,8 +36,7 @@ _D5tanya6memory2op9cmpMemoryFNaNbNixAvxQdZi: shr $0x03, %rcx repe cmpsq - jl less - jg greater + jne not_equal and $0x07, %edx jz equal @@ -49,19 +46,14 @@ _D5tanya6memory2op9cmpMemoryFNaNbNixAvxQdZi: cmp $0x0, %rcx repe cmpsb - jl less - jg greater + jne not_equal equal: - xor %rax, %rax // Return 0 - jmp end - - greater: - mov $0x01, %rax + mov $0x01, %rax // Return 1 jmp end - less: - mov $-0x01, %rax + not_equal: + xor %rax, %rax // Return 0 end: ret |