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Unified Diff: fusl/src/string/i386/memcpy.s

Issue 1573973002: Add a "fork" of musl as //fusl. (Closed) Base URL: https://github.com/domokit/mojo.git@master
Patch Set: Created 4 years, 11 months ago
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Index: fusl/src/string/i386/memcpy.s
diff --git a/fusl/src/string/i386/memcpy.s b/fusl/src/string/i386/memcpy.s
new file mode 100644
index 0000000000000000000000000000000000000000..0608dd83c761ef40e76fb1ad9b32afbf399b0c53
--- /dev/null
+++ b/fusl/src/string/i386/memcpy.s
@@ -0,0 +1,32 @@
+.global memcpy
+.global __memcpy_fwd
+.hidden __memcpy_fwd
+.type memcpy,@function
+memcpy:
+__memcpy_fwd:
+ push %esi
+ push %edi
+ mov 12(%esp),%edi
+ mov 16(%esp),%esi
+ mov 20(%esp),%ecx
+ mov %edi,%eax
+ cmp $4,%ecx
+ jc 1f
+ test $3,%edi
+ jz 1f
+2: movsb
+ dec %ecx
+ test $3,%edi
+ jnz 2b
+1: mov %ecx,%edx
+ shr $2,%ecx
+ rep
+ movsl
+ and $3,%edx
+ jz 1f
+2: movsb
+ dec %edx
+ jnz 2b
+1: pop %edi
+ pop %esi
+ ret
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