forked from TCShenanigans/symphony_stdlib
Apply agreed naming conventions
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+1
-1
@@ -3,7 +3,7 @@ pub include imath
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pub include array
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pub include console
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pub include mem
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pub include strint
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pub include string_to_int
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; Needs to be last!
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pub include LUTs
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@@ -4,7 +4,7 @@
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; r3 - Character being parsed
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; r4 - Set to -1 if the input is negative
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; Convert string to integer
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; Convert string to integer (akin to libc atoi(), strotoi())
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; Arguments:
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; r1 - Pointer to string
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; Result:
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@@ -15,30 +15,30 @@
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; r3 - last character read
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; r4 - Negative marker
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; Note: Unless the input is "0", tail-calls into a base-specific specialization.
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pub atoi:
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pub auto:
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mov r2, r1
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mov r1, 0
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mov r4, 0
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load_8 r3, [r2]
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cmp r3, 0x2D ; '-'
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jne atoi_positive
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jne auto_positive
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sub r4, zr, 1 ; Set r4 to -1
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add r2, r2, 1
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atoi_positive:
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auto_positive:
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load_16 r3, [r2] ; 2-byte prefix "0b", "0o", "0x", etc.
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or r3, r3, 0x20 ; 2nd char to lower case
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add r2, r2, 2
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cmp r3, 0x3062 ; "0b"
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je atoi_bin_loop
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je bin_loop
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cmp r3, 0x306F ; "0o"
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je atoi_oct_loop
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je oct_loop
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cmp r3, 0x3078 ; "0x"
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je atoi_hex_loop
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je hex_loop
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sub r2, r2, 2 ; no matching prefix, move pointer back
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jmp atoi_dec_loop
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jmp dec_loop
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; Epilogue
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atoi_done:
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done:
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add r1, r1, r4 ; If r4 is -1, negate r1. Else it's 0 and no effect.
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xor r1, r1, r4
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mov flags, 0 ; No error
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@@ -54,27 +54,27 @@ jmp r13
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; flags
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; r3 - last character read
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; r4 - Negative marker
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pub atoi_dec:
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pub dec:
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mov r2, r1
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mov r1, 0
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mov r4, 0
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load_8 r3, [r2]
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cmp r3, 0x2D ; '-'
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jne atoi_dec_positive
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jne dec_positive
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sub r4, zr, 1 ; Set r4 to -1
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add r2, r2, 1
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atoi_dec_loop:
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dec_loop:
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load_8 r3, [r2]
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atoi_dec_positive:
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dec_positive:
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sub r3, r3, 0x30 ; '0'
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cmp r3, 9
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ja atoi_done
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ja done
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add r2, r2, 1
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lsl flags, r1, 2 ; Use flags to help multiply by 10
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add r1, r1, flags
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lsl r1, r1, 1
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add r1, r1, r3
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jmp atoi_dec_loop
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jmp dec_loop
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; Convert binary string to integer
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; Arguments:
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@@ -86,30 +86,30 @@ jmp atoi_dec_loop
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; flags
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; r3 - last character read
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; r4 - Negative marker
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pub atoi_bin:
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pub bin:
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mov r2, r1
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mov r1, 0
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mov r4, 0
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load_8 r3, [r2]
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cmp r3, 0x2D ; '-'
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jne atoi_bin_positive
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jne bin_positive
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sub r4, zr, 1 ; Set r4 to -1
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add r2, r2, 1
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atoi_bin_positive:
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bin_positive:
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load_16 r3, [r2] ; check for prefix
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or r3, r3, 0x20 ; 2nd char to lower case
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cmp r3, 0x3062 ; "0b"
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jne atoi_bin_loop
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jne bin_loop
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add r2, r2, 2
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atoi_bin_loop:
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bin_loop:
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load_8 r3, [r2]
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sub r3, r3, 0x30 ; '0'
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cmp r3, 1
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ja atoi_done
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ja done
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add r2, r2, 1
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lsl r1, r1, 1
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add r1, r1, r3
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jmp atoi_bin_loop
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jmp bin_loop
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; Convert octal string to integer
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; Arguments:
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@@ -121,30 +121,30 @@ jmp atoi_bin_loop
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; flags
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; r3 - last character read
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; r4 - Negative marker
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pub atoi_oct:
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pub oct:
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mov r2, r1
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mov r1, 0
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mov r4, 0
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load_8 r3, [r2]
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cmp r3, 0x2D ; '-'
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jne atoi_oct_positive
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jne oct_positive
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sub r4, zr, 1 ; Set r4 to -1
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add r2, r2, 1
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atoi_oct_positive:
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oct_positive:
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load_16 r3, [r2] ; check for prefix
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or r3, r3, 0x20 ; 2nd char to lower case
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cmp r3, 0x306F ; "0o"
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jne atoi_oct_loop
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jne oct_loop
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add r2, r2, 2
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atoi_oct_loop:
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oct_loop:
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load_8 r3, [r2]
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sub r3, r3, 0x30 ; '0'
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cmp r3, 7
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ja atoi_done
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ja done
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add r2, r2, 1
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lsl r1, r1, 3
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add r1, r1, r3
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jmp atoi_oct_loop
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jmp oct_loop
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; Convert hexadecimal string to integer
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; Arguments:
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@@ -156,33 +156,33 @@ jmp atoi_oct_loop
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; flags
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; r3 - last character read
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; r4 - Negative marker
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pub atoi_hex:
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pub hex:
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mov r2, r1
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mov r1, 0
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mov r4, 0
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load_8 r3, [r2]
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cmp r3, 0x2D ; '-'
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jne atoi_hex_positive
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jne hex_positive
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sub r4, zr, 1 ; Set r4 to -1
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add r2, r2, 1
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atoi_hex_positive:
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hex_positive:
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load_16 r3, [r2] ; check for prefix
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or r3, r3, 0x20 ; 2nd char to lower case
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cmp r3, 0x3078 ; "0x"
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jne atoi_hex_loop
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jne hex_loop
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add r2, r2, 2
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atoi_hex_loop:
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hex_loop:
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load_8 r3, [r2]
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sub r3, r3, 0x30 ; '0'
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cmp r3, 10
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jb atoi_hex_add
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jb hex_add
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sub r3, r3, 0x11 ; 'A' - '0'
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and r3, r3, 0xdf ; to lower case
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cmp r3, 5 ; 0-5: 6 letters
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ja atoi_done
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ja done
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add r3, r3, 10 ; Adjust for digits below
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atoi_hex_add:
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hex_add:
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add r2, r2, 1
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lsl r1, r1, 4
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add r1, r1, r3
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jmp atoi_hex_loop
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jmp hex_loop
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@@ -1,4 +1,4 @@
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; test harness for strint.atoi
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; test harness for string_to_int
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; Registers:
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; r8 - test address
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; r9 - expected result
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@@ -10,7 +10,7 @@ next_test:
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; Set up arguments and run test
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add r1, r8, 5 ; Start of test string
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mov r13, atoi_test_ret
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jmp stdlib.strint.atoi
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jmp stdlib.string_to_int.auto
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atoi_test_ret:
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; Load reference data
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