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https://gitlab.os-k.eu/os-k-team/kvisc.git
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53 lines
903 B
Plaintext
53 lines
903 B
Plaintext
; The OS/K Team licenses this file to you under the MIT license.
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; See the LICENSE file in the project root for more information.
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;
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; int strcmp(const char *str1, const char *str2)
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;
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; Returns:
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; 0 if the contents of both strings are equal
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; 1 if the first character that does not match has a greater value in str1 than in str2
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; -1 if the first character that does not match has a lower value in str1 than in str2
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;
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strcmp:
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cmp b[ax0], b[ax1]
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cjmpnz .1
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test b[ax0], b[ax0]
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cjmpz .1
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inc ax0
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inc ax1
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jmp strcmp
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.1:
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mov rax, b[ax0]
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sub rax, b[ax1]
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sgn rax, rax
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ret
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;
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; int strncmp(const char *str1, const char *str2, int maxn)
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;
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strncmp:
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mov rcx, ax2
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.1:
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cmp b[ax0], b[ax1]
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cjmpnz .1
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test b[ax0], b[ax0]
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cjmpz .1
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inc ax0
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inc ax1
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loop strcmp
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.1:
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mov rax, b[ax0]
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sub rax, b[ax1]
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sgn rax, rax
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ret
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