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https://opencores.org/ocsvn/openrisc_2011-10-31/openrisc_2011-10-31/trunk
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| Rev 282 |
Rev 338 |
/*
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/*
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* Assembly functions for software multiplication and devision.
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* Assembly functions for software multiplication and devision.
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*/
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*/
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#define ENTRY(symbol) \
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#define ENTRY(symbol) \
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.align 4 ;\
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.align 4 ;\
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.global symbol ;\
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.global symbol ;\
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symbol:
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symbol:
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#ifdef L__mulsi3
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#ifdef L__mulsi3
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ENTRY(__mulsi3)
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ENTRY(__mulsi3)
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l.addi r11,r0,0x0
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l.addi r11,r0,0x0
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l.sfne r3,r11
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l.sfne r3,r11
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l.bnf 3f
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l.bnf 3f
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l.ori r5,r3,0x0
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l.ori r5,r3,0x0
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l.addi r6,r0,0x0
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l.addi r6,r0,0x0
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1:
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1:
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l.andi r3,r5,0x1
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l.andi r3,r5,0x1
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l.sfeq r3,r6
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l.sfeq r3,r6
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l.bf 2f
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l.bf 2f
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l.srli r5,r5,0x1
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l.srli r5,r5,0x1
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l.add r11,r11,r4
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l.add r11,r11,r4
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2:
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2:
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l.sfne r5,r6
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l.sfne r5,r6
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l.bf 1b
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l.bf 1b
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l.slli r4,r4,0x1
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l.slli r4,r4,0x1
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3:
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3:
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l.jr r9
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l.jr r9
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l.nop 0x0
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l.nop 0x0
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#endif
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#endif
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#ifdef L__udivsi3
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#ifdef L__udivsi3
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ENTRY(__udivsi3)
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ENTRY(__udivsi3)
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l.addi r1,r1,-4
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l.addi r1,r1,-4
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l.sw 0(r1),r9
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l.sw 0(r1),r9
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l.addi r11,r0,0
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l.addi r11,r0,0
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l.addi r8,r4,0
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l.addi r8,r4,0
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l.addi r5,r3,0
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l.addi r5,r3,0
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l.sfne r8,r11
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l.sfne r8,r11
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l.bnf 4f
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l.bnf 4f
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l.addi r7,r0,0
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l.addi r7,r0,0
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l.sfgtu r8,r5
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l.sfgtu r8,r5
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l.bf 5f
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l.bf 5f
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l.sfeq r8,r5
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l.sfeq r8,r5
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l.bf 6f
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l.bf 6f
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l.sfltu r11,r8
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l.sfltu r11,r8
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l.bnf 2f
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l.bnf 2f
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l.addi r13,r0,32
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l.addi r13,r0,32
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l.movhi r9,hi(0x80000000)
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l.movhi r9,hi(0x80000000)
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l.addi r6,r0,-1
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l.addi r6,r0,-1
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1:
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1:
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l.and r3,r5,r9
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l.and r3,r5,r9
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l.slli r4,r7,1
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l.slli r4,r7,1
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l.addi r15,r5,0
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l.addi r15,r5,0
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l.srli r3,r3,31
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l.srli r3,r3,31
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l.add r13,r13,r6
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l.add r13,r13,r6
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l.or r7,r4,r3
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l.or r7,r4,r3
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l.sfltu r7,r8
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l.sfltu r7,r8
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l.bf 1b
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l.bf 1b
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l.slli r5,r5,1
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l.slli r5,r5,1
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2:
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2:
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l.srli r7,r7,1
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l.srli r7,r7,1
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l.addi r13,r13,1
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l.addi r13,r13,1
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l.addi r9,r0,0
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l.addi r9,r0,0
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l.sfltu r9,r13
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l.sfltu r9,r13
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l.bnf 4f
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l.bnf 4f
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l.addi r5,r15,0
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l.addi r5,r15,0
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l.movhi r15,hi(0x80000000)
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l.movhi r15,hi(0x80000000)
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l.addi r17,r0,0
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l.addi r17,r0,0
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3:
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3:
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l.and r3,r5,r15
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l.and r3,r5,r15
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l.slli r4,r7,1
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l.slli r4,r7,1
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l.srli r3,r3,31
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l.srli r3,r3,31
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l.or r7,r4,r3
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l.or r7,r4,r3
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l.sub r6,r7,r8
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l.sub r6,r7,r8
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l.and r3,r6,r15
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l.and r3,r6,r15
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l.srli r3,r3,31
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l.srli r3,r3,31
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l.addi r4,r0,0
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l.addi r4,r0,0
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l.sfne r3,r4
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l.sfne r3,r4
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l.bf 1f
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l.bf 1f
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l.slli r3,r11,1
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l.slli r3,r11,1
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l.addi r4,r0,1
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l.addi r4,r0,1
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1:
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1:
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l.slli r5,r5,1
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l.slli r5,r5,1
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l.sfne r4,r17
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l.sfne r4,r17
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l.bnf 2f
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l.bnf 2f
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l.or r11,r3,r4
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l.or r11,r3,r4
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l.addi r7,r6,0
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l.addi r7,r6,0
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2:
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2:
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l.addi r9,r9,1
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l.addi r9,r9,1
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l.sfltu r9,r13
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l.sfltu r9,r13
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l.bf 3b
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l.bf 3b
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l.nop 0
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l.nop 0
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l.j 4f
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l.j 4f
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l.nop 0
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l.nop 0
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6:
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6:
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l.j 4f
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l.j 4f
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l.addi r11,r0,1
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l.addi r11,r0,1
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5:
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5:
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l.addi r7,r5,0
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l.addi r7,r5,0
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4:
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4:
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l.lwz r9,0(r1)
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l.lwz r9,0(r1)
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l.jr r9
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l.jr r9
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l.addi r1,r1,4
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l.addi r1,r1,4
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#endif
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#endif
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#ifdef L__divsi3
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#ifdef L__divsi3
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ENTRY(__divsi3)
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ENTRY(__divsi3)
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l.addi r1,r1,-8
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l.addi r1,r1,-8
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l.sw 0(r1),r9
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l.sw 0(r1),r9
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l.sw 4(r1),r14
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l.sw 4(r1),r14
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l.addi r5,r3,0
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l.addi r5,r3,0
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l.addi r14,r0,0
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l.addi r14,r0,0
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l.sflts r5,r0
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l.sflts r5,r0
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l.bnf 1f
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l.bnf 1f
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l.addi r3,r0,0
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l.addi r3,r0,0
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l.addi r14,r0,1
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l.addi r14,r0,1
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l.sub r5,r0,r5
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l.sub r5,r0,r5
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1:
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1:
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l.sflts r4,r0
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l.sflts r4,r0
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l.bnf 1f
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l.bnf 1f
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l.nop 0
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l.nop 0
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l.addi r14,r14,1
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l.addi r14,r14,1
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l.sub r4,r0,r4
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l.sub r4,r0,r4
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1:
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1:
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l.jal __udivsi3
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l.jal __udivsi3
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l.addi r3,r5,0
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l.addi r3,r5,0
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l.sfeqi r14,1
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l.sfeqi r14,1
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l.bnf 1f
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l.bnf 1f
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l.nop 0
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l.nop 0
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l.sub r11,r0,r11
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l.sub r11,r0,r11
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1:
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1:
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l.lwz r9,0(r1)
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l.lwz r9,0(r1)
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l.lwz r14,4(r1)
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l.lwz r14,4(r1)
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l.jr r9
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l.jr r9
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l.addi r1,r1,8
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l.addi r1,r1,8
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#endif
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#endif
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#ifdef L__umodsi3
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#ifdef L__umodsi3
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ENTRY(__umodsi3)
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ENTRY(__umodsi3)
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l.addi r1,r1,-4
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l.addi r1,r1,-4
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l.sw 0(r1),r9
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l.sw 0(r1),r9
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l.jal __udivsi3
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l.jal __udivsi3
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l.nop 0
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l.nop 0
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l.addi r11,r7,0
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l.addi r11,r7,0
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l.lwz r9,0(r1)
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l.lwz r9,0(r1)
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l.jr r9
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l.jr r9
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l.addi r1,r1,4
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l.addi r1,r1,4
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#endif
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#endif
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#ifdef L__modsi3
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#ifdef L__modsi3
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ENTRY(__modsi3)
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ENTRY(__modsi3)
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l.addi r1,r1,-8
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l.addi r1,r1,-8
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l.sw 0(r1),r9
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l.sw 0(r1),r9
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l.sw 4(r1),r14
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l.sw 4(r1),r14
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l.addi r14,r0,0
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l.addi r14,r0,0
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l.sflts r3,r0
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l.sflts r3,r0
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l.bnf 1f
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l.bnf 1f
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l.nop 0
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l.nop 0
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l.addi r14,r0,1
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l.addi r14,r0,1
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l.sub r3,r0,r3
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l.sub r3,r0,r3
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1:
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1:
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l.sflts r4,r0
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l.sflts r4,r0
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l.bnf 1f
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l.bnf 1f
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l.nop 0
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l.nop 0
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l.sub r4,r0,r4
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l.sub r4,r0,r4
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1:
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1:
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l.jal __udivsi3
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l.jal __udivsi3
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l.nop 0
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l.nop 0
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l.sfeqi r14,1
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l.sfeqi r14,1
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l.bnf 1f
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l.bnf 1f
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l.addi r11,r7,0
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l.addi r11,r7,0
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l.sub r11,r0,r11
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l.sub r11,r0,r11
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1:
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1:
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l.lwz r9,0(r1)
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l.lwz r9,0(r1)
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l.lwz r14,4(r1)
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l.lwz r14,4(r1)
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l.jr r9
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l.jr r9
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l.addi r1,r1,8
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l.addi r1,r1,8
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#endif
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#endif
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