mirror of
https://github.com/pkivolowitz/asm_book.git
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151 lines
2.4 KiB
ArmAsm
151 lines
2.4 KiB
ArmAsm
.arch armv8-a
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.file "test.c"
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.text
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.align 2
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.p2align 3,,7
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.global ClearA
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.type ClearA, %function
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ClearA:
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.LFB23:
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.cfi_startproc
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ldrb w1, [x0]
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and w1, w1, -2
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strb w1, [x0]
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ret
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.cfi_endproc
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.LFE23:
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.size ClearA, .-ClearA
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.align 2
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.p2align 3,,7
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.global SetA
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.type SetA, %function
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SetA:
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.LFB24:
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.cfi_startproc
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ldrb w1, [x0]
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orr w1, w1, 1
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strb w1, [x0]
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ret
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.cfi_endproc
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.LFE24:
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.size SetA, .-SetA
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.align 2
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.p2align 3,,7
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.global ClearB
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.type ClearB, %function
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ClearB:
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.LFB25:
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.cfi_startproc
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ldrb w1, [x0]
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and w1, w1, -7
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strb w1, [x0]
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ret
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.cfi_endproc
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.LFE25:
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.size ClearB, .-ClearB
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.align 2
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.p2align 3,,7
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.global SetB
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.type SetB, %function
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SetB:
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.LFB26:
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.cfi_startproc
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ldrb w2, [x0]
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bfi w2, w1, 1, 2
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strb w2, [x0]
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ret
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.cfi_endproc
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.LFE26:
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.size SetB, .-SetB
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.align 2
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.p2align 3,,7
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.global ClearC
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.type ClearC, %function
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ClearC:
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.LFB27:
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.cfi_startproc
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ldrb w1, [x0]
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and w1, w1, 7
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strb w1, [x0]
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ret
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.cfi_endproc
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.LFE27:
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.size ClearC, .-ClearC
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.align 2
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.p2align 3,,7
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.global SetC
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.type SetC, %function
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SetC:
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.LFB28:
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.cfi_startproc
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ldrb w2, [x0] // load *byte into w2
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ubfiz w1, w1, 3, 5 // put zeros in bit 3 to 7 of value
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and w2, w2, 7 // blank bits 3 to 7 in *byte
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orr w2, w2, w1
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strb w2, [x0]
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ret
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.cfi_endproc
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.LFE28:
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.size SetC, .-SetC
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.section .rodata.str1.8,"aMS",@progbits,1
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.align 3
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.LC0:
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.string "noBF should be 0x3A - value: 0x%X\n"
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.align 3
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.LC1:
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.string "bf should be 0x1D - value: 0x%X\n"
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.section .text.startup,"ax",@progbits
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.align 2
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.p2align 3,,7
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.global main
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.type main, %function
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main:
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.LFB29:
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.cfi_startproc
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stp x29, x30, [sp, -32]!
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.cfi_def_cfa_offset 32
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.cfi_offset 29, -32
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.cfi_offset 30, -24
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mov w5, 2
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mov w4, 3
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mov x29, sp
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ldrb w0, [sp, 24]
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adrp x2, .LANCHOR0
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adrp x1, .LC0
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add x1, x1, :lo12:.LC0
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orr w0, w0, 1
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strb w0, [sp, 24]
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mov w0, 58
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strb w0, [x2, #:lo12:.LANCHOR0]
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ldrb w3, [sp, 24]
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mov w2, 58
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mov w0, 1
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bfi w3, w5, 1, 2
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strb w3, [sp, 24]
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ldrb w3, [sp, 24]
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bfi w3, w4, 3, 5
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strb w3, [sp, 24]
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bl __printf_chk
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ldrb w2, [sp, 24]
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adrp x1, .LC1
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mov w0, 1
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add x1, x1, :lo12:.LC1
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bl __printf_chk
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mov w0, 0
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ldp x29, x30, [sp], 32
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.cfi_restore 30
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.cfi_restore 29
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.cfi_def_cfa_offset 0
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ret
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.cfi_endproc
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.LFE29:
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.size main, .-main
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.global noBF
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.bss
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.set .LANCHOR0,. + 0
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.type noBF, %object
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.size noBF, 1
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noBF:
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.zero 1
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.ident "GCC: (Ubuntu 9.4.0-1ubuntu1~20.04.1) 9.4.0"
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.section .note.GNU-stack,"",@progbits
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