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59 lines
1018 B
ArmAsm
59 lines
1018 B
ArmAsm
# assembler directives
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.set gp=64
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.include "macros.inc"
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.section .text, "ax"
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.balign 32
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glabel mtxf_to_mtx_asm
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li.s $f6, 4.0
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li.s $f8, 1.0
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li $v0, 1
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li.s $f4, 65536.0
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// flags will never update in this loop, so do the compare only once.
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// if this ever breaks contact someone2639, and then maybe MIPS Technologies, Inc.
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c.eq.s $f6, $f8
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1:
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lwc1 $f0, ($a1)
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lwc1 $f2, 0x04($a1)
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bc1f 3f
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2:
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andi $t0, $v0, (1 << 1)
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mul.s $f0, $f4
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trunc.w.s $f0, $f0
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mfc1 $t3, $f0
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addiu $a1, 8
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sra $t4, $t3, 16
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sh $t4, 0x00($a0)
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sh $t3, 0x20($a0)
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addiu $v0, 2
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bnez $t0, storezero
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mul.s $f2, $f4
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trunc.w.s $f2, $f2
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mfc1 $t3, $f2
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sra $t4, $t3, 16
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sh $t4, 0x02($a0)
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sh $t3, 0x22($a0)
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loopend:
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.set noreorder
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bnel $v0, 0x11, 1b
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addiu $a0, 4
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.set reorder
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li $t1, 1
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sh $t1, 0x02($a0)
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jr $ra
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storezero:
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sh $zero, 0x02($a0)
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sh $zero, 0x22($a0)
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j loopend
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3:
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div.s $f0, $f6
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div.s $f2, $f6
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b 2b
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