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https://gitlab.os-k.eu/os-k-team/kvisc.git
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84 lines
1.3 KiB
Plaintext
84 lines
1.3 KiB
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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; struct TIME
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; {
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; byte sec; +0 (0-59)
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; byte min; +1 (0-59)
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; byte hour; +2 (0-23)
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; byte mday; +3 (0-31)
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; byte month; +4 (0-11)
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; byte; +5 (pad)
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; word year; +6 (0-65536)
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; word yday; +8 (0-365)
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; word; +10 (pad)
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; dword; +12 (pad)
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; } 16 bytes
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;
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;
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; int DaysInYear(int year)
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;
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DaysInYear:
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mov rax, 365
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; divisible by 4?
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rem rcx, ax0, 4
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b.nz rcx, 0, .end
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; divisible by 100?
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rem rcx, ax0, 100
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b.nz rcx, 0, .leap
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; divisible by 400?
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rem rcx, ax0, 400
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b.nz rcx, 0, .end
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.leap:
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inc rax
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.end:
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ret
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;
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; TIME *GetTimeUTC(void)
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;
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GetTimeUTC:
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ytime r11, r12, r13
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mov rdx, .buf
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; seconds
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rem rcx, r11, 60
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mov b[rdx], rcx
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; minutes
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div rcx, r11, 60
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rem rcx, 60
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mov b[rdx+1], rcx
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; hours
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div rcx, r11, 3600
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rem rcx, 24
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mov b[rdx+2], rcx
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; month days
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div rcx, r11, 3600*24
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mov b[rdx+3], rcx
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; month
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mov b[rdx+4], r12
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; years
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mov w[rdx+6], r13
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;
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; ydays (TODO)
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;
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mov rax, .buf
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ret
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.buf = [24]
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