163 lines
2.1 KiB
Plaintext
163 lines
2.1 KiB
Plaintext
REGISTERS
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r0 GPR RET0;
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r1 GPR RET1;
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r2 GPR;
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r3 GPR;
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r4 GPR;
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r5 GPR;
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r6 GPR;
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r7 GPR;
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r8 GPR;
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r9 GPR;
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r10 GPR;
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r11 GPR;
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cc CC;
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DECLARATIONS
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address fragment;
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aluparam fragment;
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reg allocates(GPR);
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tristate allocates(CC);
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PATTERNS
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/* Special */
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reg;
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reg = REG4;
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PAIR(BLOCK4, BLOCK4);
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/* Miscellaneous special things */
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PUSH4(in:reg)
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emit "push %in"
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cost 4;
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reg = POP4
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emit "pop %reg"
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cost 4;
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RET
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emit "ret"
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cost 4;
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SETRET4(in:reg)
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emit "mov r0, %in"
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cost 4;
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/* Memory operations */
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STORE4(addr:address, value:reg)
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emit "str %value, %addr"
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cost 4;
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reg = LOAD4(addr:address)
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emit "ldr %reg, %addr"
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cost 4;
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reg = LOAD1(addr:address)
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emit "ldrb %reg, %addr"
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cost 4;
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reg = CIU14(LOAD1(addr:address))
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emit "ldrb %reg, %addr"
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cost 4;
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reg = CII14(CIU41(CIU14(LOAD1(addr:address))))
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emit "ldrsb %reg, %addr"
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cost 4;
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/* Locals */
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reg = in:LOCAL4
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emit "add %reg, fp, #$in"
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cost 4;
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address = in:LOCAL4
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emit "[fp, #$in]";
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/* Memory addressing modes */
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address = ADD4(addr:reg, offset:CONST4)
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emit "[%addr, #$offset]";
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address = addr:reg
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emit "[%addr]";
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/* Branches */
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JUMP(addr:BLOCK4)
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emit "b $addr"
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cost 4;
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CJUMPEQ(value:tristate, PAIR(true:BLOCK4, false:BLOCK4))
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emit "beq $true"
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emit "bne $false"
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cost 8;
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/* Comparisons */
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tristate = COMPARES4(left:reg, right:aluparam)
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emit "cmp %left, %right"
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cost 4;
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reg = tristate
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emit "mov %reg, #0"
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emit "movlt %reg, #-1"
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emit "movgt %reg, #1"
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cost 12;
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/* Conversions */
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reg = CII14(CIU41(value:reg))
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emit "sxtb %reg, %value"
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cost 4;
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reg = CIU41(in:reg)
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emit "and %reg, %in, #0xff"
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cost 4;
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/* ALU operations */
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reg = ADD4(left:reg, right:aluparam)
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emit "add %reg, %left, %right"
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cost 4;
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reg = ADD4(left:aluparam, right:reg)
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emit "add %reg, %right, %left"
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cost 4;
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aluparam = value:CONST4
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emit "#$value";
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aluparam = reg;
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reg = value:aluparam
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emit "mov %reg, %value"
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cost 4;
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reg = value:LABEL4
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emit "adr %reg, $value"
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cost 4;
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reg = value:BLOCK4
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emit "adr %reg, $value"
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cost 4;
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reg = value:CONST4
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emit "ldr %reg, #$value"
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cost 4;
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