diff options
Diffstat (limited to 'asm/rom2.s')
| -rw-r--r-- | asm/rom2.s | 151 |
1 files changed, 4 insertions, 147 deletions
@@ -1,150 +1,7 @@ -/* rom2.s TODO: Disassemble */ - .include "asm/macros.inc" - .section .text + .include "asm/macros.inc" + .include "global.inc" - .incbin "baserom.nds", 0xD9150, 0x16AE0 + .data - arm_func_start _ll_mul -_ll_mul: ; 0x020EBC30 - stmdb sp!, {r4, r5, lr} - umull r5, r4, r0, r2 - mla r4, r0, r3, r4 - mla r4, r2, r1, r4 - mov r1, r4 - mov r0, r5 - ldmia sp!, {r4, r5, lr} - bx lr - - arm_func_start _ll_shl -_ll_shl: ; 0x020EBC50 - ands r2, r2, #0x3F - bxeq lr - subs r3, r2, #0x20 - bge _020EBC74 - rsb r3, r2, #0x20 - mov r1, r1, lsl r2 - orr r1, r1, r0, lsr r3 - mov r0, r0, lsl r2 - bx lr -_020EBC74: - mov r1, r0, lsl r3 - mov r0, #0x0 - bx lr - - arm_func_start _s32_div_f -_s32_div_f: ; 0x20EBC80 - ; Test whether the args have different signs - eor ip, r0, r1 - and ip, ip, #0x80000000 - ; Test the sign of the numerator, and make it positive - cmp r0, #0x0 - rsblt r0, r0, #0x0 - addlt ip, ip, #1 - ; Make the denominator positive, also test for div0 - cmp r1, #0x0 - rsblt r1, r1, #0x0 - beq _020EBE78 - ; If the numerator is less than the denominator, return (0, numerator) - cmp r0, r1 - movcc r1, r0 - movcc r0, #0x0 - bcc _020EBE78 - ; Do the actual division - mov r2, #0x1c - mov r3, r0, lsr #0x4 - cmp r1, r3, lsr #0xc - suble r2, r2, #0x10 - movle r3, r3, lsr #0x10 - cmp r1, r3, lsr #0x4 - suble r2, r2, #0x8 - movle r3, r3, lsr #0x8 - cmp r1, r3 - suble r2, r2, #0x4 - movle r3, r3, lsr #0x4 - mov r0, r0, lsl r2 - rsb r1, r1, #0x0 - adds r0, r0, r0 - add r2, r2, r2, lsl #0x1 - add pc, pc, r2, lsl #0x2 - nop - .rept 32 - adcs r3, r1, r3, lsl #0x1 - subcc r3, r3, r1 - adcs r0, r0, r0 - .endr - mov r1, r3 -_020EBE78: - ; If the signs differed originally, negate quotient - ands r3, ip, #0x80000000 - rsbne r0, r0, #0x0 - ; If the numerator was negative, negate remainder - ands r3, ip, #0x1 - rsbne r1, r1, #0x0 - bx lr - -; required to make the linker happy : - - arm_func_start _u32_div_f -_u32_div_f: ; 0x020EBE8C - cmp r1, #0x0 - bxeq lr ; About as wrong as we can be - cmp r0, r1 - movcc r1, r0 - movcc r0, #0x0 - bxcc lr - mov r2, #0x1c - mov r3, r0, lsr #0x4 - cmp r1, r3, lsr #0xc - suble r2, r2, #0x10 - movle r3, r3, lsr #0x10 - cmp r1, r3, lsr #0x4 - suble r2, r2, #0x8 - movle r3, r3, lsr #0x8 - cmp r1, r3 - suble r2, r2, #0x4 - movle r3, r3, lsr #0x4 - mov r0, r0, lsl r2 - rsb r1, r1, #0x0 - adds r0, r0, r0 - add r2, r2, r2, lsl #0x1 - add pc, pc, r2, lsl #0x2 - nop - .rept 32 - adcs r3, r1, r3, lsl #0x1 - subcc r3, r3, r1 - adcs r0, r0, r0 - .endr - mov r1, r3 - bx lr - - .incbin "baserom.nds", 0xF0070, 0x55C - - arm_func_start _fp_init -_fp_init: ; 0x020EC5CC - bx lr - - arm_func_start sys_writec -sys_writec: ; 0x020EC5D0 - str lr, [sp, #-4]! - mov r1, r0 - mov r0, #0x3 - swi 0x123456 - ldr pc, [sp], #0x4 - - arm_func_start sys_readc -sys_readc: ; 0x020EC5E4 - str lr, [sp, #-4]! - mov r1, #0x0 - mov r0, #0x7 - swi 0x123456 - ldr pc, [sp], #0x4 - - .incbin "baserom.nds", 0xF05F8, 0x9C - - arm_func_start __call_static_initializers -__call_static_initializers: ; 0x020EC694 -.incbin "baserom.nds", 0xF0694, 0x7C - - .section .data -.incbin "baserom.nds", 0xF0710, 0x3F8 +.incbin "baserom.nds", 0xF0710, 0x3F8 ; this does not seem to be code |