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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
41 lines
815 B
ArmAsm
41 lines
815 B
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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#define MTX_INTPART 0
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#define MTX_FRACPART 0x20
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LEAF(guMtxF2L)
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li $at, 0x47800000 // 65536.0f
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mtc1 $at, $f0
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li $t9, 0xFFFF0000
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addiu $t8, $a1, MTX_FRACPART
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1:
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lwc1 $f4, ($a0)
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lwc1 $f10, 4($a0)
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addiu $a1, $a1, 4
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mul.s $f6, $f4, $f0
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addiu $a0, $a0, 8
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mul.s $f16, $f10, $f0
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trunc.w.s $f8, $f6
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trunc.w.s $f18, $f16
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mfc1 $t0, $f8
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mfc1 $t1, $f18
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and $t2, $t0, $t9
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sll $t5, $t0, 0x10
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srl $t3, $t1, 0x10
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andi $t6, $t1, 0xFFFF
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or $t4, $t2, $t3
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or $t7, $t5, $t6
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sw $t4, (MTX_INTPART-4)($a1)
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bne $a1, $t8, 1b
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sw $t7, (MTX_FRACPART-4)($a1)
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jr $ra
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nop
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END(guMtxF2L)
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