mirror of
https://github.com/zeldaret/oot.git
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7334ffa373
* Format all handwritten asm and document some * Use c preprocessor for constants * Fix * Fix PI_STATUS_ERROR, some label improvements * Avoid hi/lo for constants * Some more comments * Properly mark functions as functions and their sizes * Fix merge * Improvements * Review suggestions, rework procedure start/end macros to be more like libreultra * Move IPL3 symbol definitions into ipl3.s * Fix undefined_syms, add include and language guards to asm.h and fix the comment in gbi.h * Consistent hex capitalization, add some MIPS builtin defines to CC_CHECK to behave properly * Add -no-pad-sections assembler option and clean up alignment in gu files and bzero * Further suggestions and improvements * Matrix conversion function clarifications * Fix passing AVOID_UB to gcc * Suggestions * Suggestions, global interrupt mask improvements * Further suggestions, interrupt mask comments * Comments fixes, rdb.h * Switch from # comments to // comments, remove unnecesary .set gp=64 directives * Further review suggestions * Missed one
233 lines
5.3 KiB
ArmAsm
233 lines
5.3 KiB
ArmAsm
#include "ultra64/asm.h"
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.set noat
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.set noreorder
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.section .text
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.balign 16
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LEAF(bcopy)
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beqz $a2, ret
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move $a3, $a1
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beq $a0, $a1, ret
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slt $at, $a1, $a0
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bnezl $at, goforwards
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slti $at, $a2, 0x10
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add $v0, $a0, $a2
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slt $at, $a1, $v0
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beql $at, $zero, goforwards
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slti $at, $a2, 0x10
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b gobackwards
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slti $at, $a2, 0x10
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slti $at, $a2, 0x10
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goforwards:
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bnez $at, forwards_bytecopy
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nop
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andi $v0, $a0, 3
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andi $v1, $a1, 3
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beq $v0, $v1, forwalignable
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nop
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forwards_bytecopy:
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beqz $a2, ret
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nop
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addu $v1, $a0, $a2
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99:
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lb $v0, ($a0)
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addiu $a0, $a0, 1
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addiu $a1, $a1, 1
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bne $a0, $v1, 99b
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sb $v0, -1($a1)
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ret:
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jr $ra
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move $v0, $a3
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forwalignable:
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beqz $v0, forwards_32
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li $at, 1
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beq $v0, $at, forw_copy3
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li $at, 2
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beql $v0, $at, forw_copy2
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lh $v0, ($a0)
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lb $v0, ($a0)
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addiu $a0, $a0, 1
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addiu $a1, $a1, 1
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addiu $a2, $a2, -1
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b forwards_32
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sb $v0, -1($a1)
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lh $v0, ($a0)
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forw_copy2:
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addiu $a0, $a0, 2
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addiu $a1, $a1, 2
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addiu $a2, $a2, -2
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b forwards_32
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sh $v0, -2($a1)
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forw_copy3:
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lb $v0, ($a0)
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lh $v1, 1($a0)
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addiu $a0, $a0, 3
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addiu $a1, $a1, 3
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addiu $a2, $a2, -3
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sb $v0, -3($a1)
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sh $v1, -2($a1)
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forwards:
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forwards_32:
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slti $at, $a2, 0x20
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bnezl $at, forwards_16_
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slti $at, $a2, 0x10
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lw $v0, ($a0)
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lw $v1, 4($a0)
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lw $t0, 8($a0)
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lw $t1, 0xC($a0)
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lw $t2, 0x10($a0)
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lw $t3, 0x14($a0)
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lw $t4, 0x18($a0)
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lw $t5, 0x1C($a0)
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addiu $a0, $a0, 0x20
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addiu $a1, $a1, 0x20
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addiu $a2, $a2, -0x20
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sw $v0, -0x20($a1)
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sw $v1, -0x1C($a1)
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sw $t0, -0x18($a1)
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sw $t1, -0x14($a1)
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sw $t2, -0x10($a1)
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sw $t3, -0xC($a1)
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sw $t4, -8($a1)
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b forwards_32
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sw $t5, -4($a1)
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forwards_16:
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slti $at, $a2, 0x10
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forwards_16_: // fake label due to branch likely optimization
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bnezl $at, forwards_4_
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slti $at, $a2, 4
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lw $v0, ($a0)
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lw $v1, 4($a0)
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lw $t0, 8($a0)
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lw $t1, 0xC($a0)
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addiu $a0, $a0, 0x10
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addiu $a1, $a1, 0x10
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addiu $a2, $a2, -0x10
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sw $v0, -0x10($a1)
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sw $v1, -0xC($a1)
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sw $t0, -8($a1)
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b forwards_16
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sw $t1, -4($a1)
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forwards_4:
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slti $at, $a2, 4
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forwards_4_: // fake label due to branch likely optimization
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bnez $at, forwards_bytecopy
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nop
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lw $v0, ($a0)
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addiu $a0, $a0, 4
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addiu $a1, $a1, 4
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addiu $a2, $a2, -4
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b forwards_4
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sw $v0, -4($a1)
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slti $at, $a2, 0x10
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gobackwards:
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add $a0, $a0, $a2
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bnez $at, backwards_bytecopy
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add $a1, $a1, $a2
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andi $v0, $a0, 3
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andi $v1, $a1, 3
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beq $v0, $v1, backalignable
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nop
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backwards_bytecopy:
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beqz $a2, ret
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nop
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addiu $a0, $a0, -1
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addiu $a1, $a1, -1
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subu $v1, $a0, $a2
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99:
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lb $v0, ($a0)
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addiu $a0, $a0, -1
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addiu $a1, $a1, -1
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bne $a0, $v1, 99b
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sb $v0, 1($a1)
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jr $ra
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move $v0, $a3
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backalignable:
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beqz $v0, backwards_32
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li $at, 3
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beq $v0, $at, back_copy3
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li $at, 2
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beql $v0, $at, back_copy2
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lh $v0, -2($a0)
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lb $v0, -1($a0)
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addiu $a0, $a0, -1
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addiu $a1, $a1, -1
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addiu $a2, $a2, -1
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b backwards_32
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sb $v0, ($a1)
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lh $v0, -2($a0)
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back_copy2:
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addiu $a0, $a0, -2
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addiu $a1, $a1, -2
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addiu $a2, $a2, -2
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b backwards_32
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sh $v0, ($a1)
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back_copy3:
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lb $v0, -1($a0)
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lh $v1, -3($a0)
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addiu $a0, $a0, -3
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addiu $a1, $a1, -3
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addiu $a2, $a2, -3
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sb $v0, 2($a1)
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sh $v1, ($a1)
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backwards:
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backwards_32:
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slti $at, $a2, 0x20
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bnezl $at, backwards_16_
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slti $at, $a2, 0x10
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lw $v0, -4($a0)
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lw $v1, -8($a0)
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lw $t0, -0xc($a0)
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lw $t1, -0x10($a0)
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lw $t2, -0x14($a0)
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lw $t3, -0x18($a0)
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lw $t4, -0x1c($a0)
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lw $t5, -0x20($a0)
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addiu $a0, $a0, -0x20
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addiu $a1, $a1, -0x20
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addiu $a2, $a2, -0x20
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sw $v0, 0x1C($a1)
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sw $v1, 0x18($a1)
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sw $t0, 0x14($a1)
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sw $t1, 0x10($a1)
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sw $t2, 0xC($a1)
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sw $t3, 8($a1)
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sw $t4, 4($a1)
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b backwards_32
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sw $t5, ($a1)
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backwards_16:
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slti $at, $a2, 0x10
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backwards_16_: // fake label due to branch likely optimization
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bnezl $at, backwards_4_
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slti $at, $a2, 4
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lw $v0, -4($a0)
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lw $v1, -8($a0)
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lw $t0, -0xC($a0)
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lw $t1, -0x10($a0)
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addiu $a0, $a0, -0x10
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addiu $a1, $a1, -0x10
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addiu $a2, $a2, -0x10
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sw $v0, 0xC($a1)
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sw $v1, 8($a1)
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sw $t0, 4($a1)
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b backwards_16
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sw $t1, ($a1)
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backwards_4:
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slti $at, $a2, 4
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backwards_4_: // fake label due to branch likely optimization
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bnez $at, backwards_bytecopy
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nop
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lw $v0, -4($a0)
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addiu $a0, $a0, -4
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addiu $a1, $a1, -4
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addiu $a2, $a2, -4
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b backwards_4
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sw $v0, ($a1)
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END(bcopy)
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