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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
52 lines
1.1 KiB
ArmAsm
52 lines
1.1 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 32
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LEAF(guScale)
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li $at, 0x47800000 // 65536.0f
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mtc1 $at, $f4
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mtc1 $a1, $f6
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sw $zero, 4($a0)
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sw $zero, 0xC($a0)
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mul.s $f8, $f6, $f4
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mtc1 $a2, $f6
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sw $zero, 0x10($a0)
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sw $zero, 0x18($a0)
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sw $zero, 0x24($a0)
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sw $zero, 0x2C($a0)
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sw $zero, 0x30($a0)
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trunc.w.s $f10, $f8
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mul.s $f8, $f6, $f4
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mtc1 $a3, $f6
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sw $zero, 0x38($a0)
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mfc1 $t1, $f10
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sw $zero, 0x3C($a0)
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srl $t2, $t1, 0x10
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trunc.w.s $f10, $f8
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mul.s $f8, $f6, $f4
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sll $t0, $t2, 0x10
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sll $t2, $t1, 0x10
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mfc1 $t1, $f10
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sw $t0, ($a0)
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sw $t2, 0x20($a0)
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srl $t0, $t1, 0x10
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trunc.w.s $f10, $f8
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andi $t2, $t1, 0xFFFF
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sw $t2, 0x28($a0)
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sw $t0, 8($a0)
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mfc1 $t1, $f10
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nop
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srl $t2, $t1, 0x10
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sll $t0, $t2, 0x10
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sw $t0, 0x14($a0)
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li $t0, 1
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sll $t2, $t1, 0x10
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sw $t2, 0x34($a0)
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jr $ra
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sw $t0, 0x1C($a0)
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END(guScale)
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