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Author SHA1 Message Date
ShatteredMINT 354be538c6 clean up confusion about function template 2026-09-02 20:48:04 +02:00
+8 -29
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@@ -1,15 +1,8 @@
; Multiplies r1 and r2, returning the lower part of the result
; Arguments:
; r1 - The first value
; r2 - The second value
; Result:
; r1 - The lower 32 bits of the result
; Clobbers: r2, r3, r4, r5
pub mul_low: pub mul_low:
mov r3, 0 ; result mov r3, 0 ; result
mov r4, 31 ; loop counter mov r4, 31 ; loop counter
mul_low_loop: mull_loop:
asr r5, r2, 31 asr r5, r2, 31
and r5, r5, r1 and r5, r5, r1
lsl r5, r5, r4 lsl r5, r5, r4
@@ -17,18 +10,14 @@ pub mul_low:
lsl r2, r2, 1 lsl r2, r2, 1
sub r4, r4, 1 sub r4, r4, 1
cmp r4, 0 cmp r4, 0
jge mul_low_loop jge mull_loop
mov r1, r3 mov r1, r3
jmp r13 jmp r13
; Calculates the absolute value of the value provided in the r1 register ; Calculates the absolute value of the value provided in the r1 register
; Arguments: ; Based on Stanford's BitHacks
; r1 - The value for which we want the absolute value ; Clobbers r2
; Result:
; r1 - The calculated absolute value
; Clobbers: r2
; Info: Based on Stanford's BitHacks
pub abs: ; SHOULD BE INLINED pub abs: ; SHOULD BE INLINED
; mask = v >> 31 ; mask = v >> 31
asr r2, r1, 31 asr r2, r1, 31
@@ -39,13 +28,8 @@ pub abs: ; SHOULD BE INLINED
jmp r13 jmp r13
; Calculates the minimum value of the two values provided in the r1 and r2 registers ; Calculates the minimum value of the two values provided in the r1 and r2 registers
; Arguments: ; Based on Stanford's BitHacks
; r1 - The first value ; Clobbers flags
; r2 - The second value
; Result:
; r1 - The smaller value
; Clobbers: Nothing
; Info: Based on Stanford's BitHacks
pub min: ; SHOULD BE INLINED pub min: ; SHOULD BE INLINED
; x < y ; x < y
cmp r1, r2 cmp r1, r2
@@ -61,13 +45,8 @@ pub min: ; SHOULD BE INLINED
jmp r13 jmp r13
; Calculates the maximum value of the two values provided in the r1 and r2 registers ; Calculates the maximum value of the two values provided in the r1 and r2 registers
; Arguments: ; Based on Stanford's BitHacks
; r1 - The first value ; Clobbers r2 and flags
; r2 - The second value
; Result:
; r1 - The smaller value
; Clobbers: r2
; Info: Based on Stanford's BitHacks
pub max: ; SHOULD BE INLINED pub max: ; SHOULD BE INLINED
; x < y ; x < y
cmp r1, r2 cmp r1, r2