23 lines
1.1 KiB
ArmAsm
23 lines
1.1 KiB
ArmAsm
/*
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* Generic 32-bit floating-point operation. Provide an "instr" line that
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* specifies an instruction that performs "s2 = s0 op s1". Because we
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* use the "softfp" ABI, this must be an instruction, not a function call.
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*
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* For: add-float, sub-float, mul-float, div-float
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*/
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/* floatop vAA, vBB, vCC */
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FETCH r0, 1 @ r0<- CCBB
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mov r9, rINST, lsr #8 @ r9<- AA
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mov r3, r0, lsr #8 @ r3<- CC
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and r2, r0, #255 @ r2<- BB
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VREG_INDEX_TO_ADDR r3, r3 @ r3<- &vCC
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VREG_INDEX_TO_ADDR r2, r2 @ r2<- &vBB
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flds s1, [r3] @ s1<- vCC
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flds s0, [r2] @ s0<- vBB
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FETCH_ADVANCE_INST 2 @ advance rPC, load rINST
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$instr @ s2<- op
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GET_INST_OPCODE ip @ extract opcode from rINST
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VREG_INDEX_TO_ADDR r9, r9 @ r9<- &vAA
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fsts s2, [r9] @ vAA<- s2
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GOTO_OPCODE ip @ jump to next instruction
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