23 lines
1 KiB
ArmAsm
23 lines
1 KiB
ArmAsm
%default {"preinstr":""}
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/*
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* Generic 64bit-to-32bit unary operation. Provide an "instr" line
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* that specifies an instruction that performs "result = op r0/r1", where
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* "result" is a 32-bit quantity in r0.
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*
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* For: long-to-float, double-to-int, double-to-float
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*
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* (This would work for long-to-int, but that instruction is actually
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* an exact match for op_move.)
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*/
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/* unop vA, vB */
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mov r3, rINST, lsr #12 @ r3<- B
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ubfx r9, rINST, #8, #4 @ r9<- A
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VREG_INDEX_TO_ADDR r3, r3 @ r3<- &fp[B]
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ldmia r3, {r0-r1} @ r0/r1<- vB/vB+1
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FETCH_ADVANCE_INST 1 @ advance rPC, load rINST
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$preinstr @ optional op; may set condition codes
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$instr @ r0<- op, r0-r3 changed
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GET_INST_OPCODE ip @ extract opcode from rINST
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SET_VREG r0, r9 @ vA<- r0
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GOTO_OPCODE ip @ jump to next instruction
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/* 9-10 instructions */
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