mirror of
https://github.com/sharkdp/bat
synced 2024-12-22 02:03:06 +00:00
56 lines
853 B
ArmAsm
56 lines
853 B
ArmAsm
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.data
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.balign 4
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red: .word 0
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green: .word 0
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blue: .word 0
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.text
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.global grayscale
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.func grayscale
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grayscale:
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assign:
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/* some comment */
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ldr ip, addr_red
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str r3, [ip]
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ldr ip, addr_green
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ldmfd r13!, {r3}
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str r3, [ip]
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ldr ip, addr_blue
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ldmfd r13!, {r3}
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str r3, [ip]
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stmfd r13!, {r4-r8}
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ldr ip, addr_red
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ldr r3, [ip]
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ldr ip, addr_green
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ldr r4, [ip]
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ldr ip, addr_blue
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ldr r5, [ip] /* another comment */
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grayscale_loop:
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ldrb r6, [r1]
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mul r6, r3, r6
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add r1, r1, #1
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ldrb r7, [r1]
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mul r7, r4, r7
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add r1, r1, #1
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ldrb r8, [r1]
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mul r8, r5, r8
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add r1, r1, #1
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add r6, r6, r7
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add r6, r6, r8
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asr r6, r6, #8
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str r6, [r2]
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add r2, r2, #1
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sub r0, r0, #1
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cmp r0, #0
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bne grayscale_loop
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ldmfd r13!, {r4-r8}
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stmfd r13!, {r0-r1}
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bx lr
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addr_red: .word red
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addr_green: .word green
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addr_blue: .word blue
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