REGISTERS /* Registers are allocated top down; the order here is odd in order to make * sure that non-volatile registers get allocated from r31 (or f31) down. * * Attributes may have at most one of: int, float, long, double. These * indicate that the register is used to store a value of that type. If * your register can store more than one type, create an alias. Registers * with none of these cannot be copied by the code generator (and so cannot * be moved from register to register or spilt). */ r12 int volatile; r11 int volatile; r10 int volatile; r9 int volatile; r8 int volatile; r7 int volatile; r6 int volatile; r5 int volatile; r4 int volatile; r3 int volatile ret; r31 int; r30 int; r29 int; r28 int; r27 int; r26 int; r25 int; r24 int; r23 int; r22 int; r21 int; r20 int; r19 int; r18 int; r17 int; r16 int; r15 int; r14 int; r13 int; r11r12 named("r11", "r12") aliases(r11, r12) long volatile; r9r10 named("r9", "r10") aliases(r9, r10) long volatile; r7r8 named("r7", "r8") aliases(r7, r8) long volatile; r5r6 named("r5", "r6") aliases(r6, r6) long volatile; r3r4 named("r3", "r4") aliases(r3, r4) long volatile lret; r29r30 named("r29", "r30") aliases(r29, r30) long; r27r28 named("r27", "r28") aliases(r27, r28) long; r25r26 named("r25", "r26") aliases(r25, r26) long; r23r24 named("r23", "r24") aliases(r23, r24) long; r21r22 named("r21", "r22") aliases(r21, r22) long; r19r20 named("r19", "r20") aliases(r19, r20) long; r17r18 named("r17", "r18") aliases(r17, r18) long; r15r16 named("r15", "r16") aliases(r15, r16) long; r13r14 named("r13", "r14") aliases(r13, r14) long; f14 float volatile; f13 float volatile; f12 float volatile; f11 float volatile; f10 float volatile; f9 float volatile; f8 float volatile; f7 float volatile; f6 float volatile; f5 float volatile; f4 float volatile; f3 float volatile fret; f2 float volatile; f1 float volatile; f0 float volatile; f31 float; f30 float; f29 float; f28 float; f27 float; f26 float; f25 float; f24 float; f23 float; f22 float; f21 float; f20 float; f19 float; f18 float; f17 float; f16 float; f15 float; d14 named("f14") aliases(f14) double volatile; d13 named("f13") aliases(f13) double volatile; d12 named("f12") aliases(f12) double volatile; d11 named("f11") aliases(f11) double volatile; d10 named("f10") aliases(f10) double volatile; d9 named("f9") aliases(f9) double volatile; d8 named("f8") aliases(f8) double volatile; d7 named("f7") aliases(f7) double volatile; d6 named("f6") aliases(f6) double volatile; d5 named("f5") aliases(f5) double volatile; d4 named("f4") aliases(f4) double volatile; d3 named("f3") aliases(f3) double volatile dret; d2 named("f2") aliases(f2) double volatile; d1 named("f1") aliases(f1) double volatile; d0 named("f0") aliases(f0) double volatile; d31 named("f31") aliases(f31) double; d30 named("f30") aliases(f30) double; d29 named("f29") aliases(f29) double; d28 named("f28") aliases(f28) double; d27 named("f27") aliases(f27) double; d26 named("f26") aliases(f26) double; d25 named("f25") aliases(f25) double; d24 named("f24") aliases(f24) double; d23 named("f23") aliases(f23) double; d22 named("f22") aliases(f22) double; d21 named("f21") aliases(f21) double; d20 named("f20") aliases(f20) double; d19 named("f19") aliases(f19) double; d18 named("f18") aliases(f18) double; d17 named("f17") aliases(f17) double; d16 named("f16") aliases(f16) double; d15 named("f15") aliases(f15) double; cr0 cr; DECLARATIONS cr; ubyteX; /* bottom 8 bits valid, the rest undefined */ ubyte0; /* bottom 8 bits valid, the rest 0 */ ushortX; /* bottom 16 bits valid, the rest undefined */ ushort0; /* bottom 16 bits valid, the rest 0 */ address fragment; PATTERNS /* Special */ PAIR(BLOCK.I, BLOCK.I); /* Miscellaneous special things */ PUSH.I(in:(int)reg) emit "stwu %in, -4(sp)" cost 4; PUSH.L(in:(long)reg) emit "stwu %in.0, -4(sp)" emit "stwu %in.1, -4(sp)" cost 8; PUSH.D(in:(double)reg) emit "stfdu %in, -8(sp)" cost 4; out:(int)reg = POP.I emit "lwz %out, 0(sp)" emit "addi sp, sp, 4" cost 8; out:(long)reg = POP.L emit "lwz %out.0, 4(sp)" emit "lwz %out.1, 0(sp)" emit "addi sp, sp, 8" cost 12; out:(float)reg = POP.F emit "lfs %out, 0(sp)" emit "addi sp, sp, 4" cost 8; out:(double)reg = POP.D emit "lfd %out, 0(sp)" emit "addi sp, sp, 8" cost 8; SETRET.I(in:(ret)reg) emit "! setret4" cost 1; SETRET.L(in:(lret)reg) emit "! setret8" cost 1; STACKADJUST.I(delta:CONST.I) when signed_constant(%delta, 16) emit "addi sp, sp, $delta" cost 4; STACKADJUST.I(in:(int)reg) emit "add sp, sp, %in" cost 4; STACKADJUST.I(NEG.I(in:(int)reg)) emit "subf sp, %in, sp" cost 4; out:(int)reg = GETFP.I emit "mr %out, fp" cost 4; SETFP.I(in:(int)reg) emit "mr fp, %in" cost 4; out:(int)reg = CHAINFP.I(in:(int)reg) emit "lwz %out, 0(%in)" cost 4; out:(int)reg = FPTOAB.I(GETFP.I) emit "addi %out, fp, 8" cost 4; out:(int)reg = FPTOAB.I(in:(int)reg) emit "addi %out, %in, 8" cost 4; out:(int)reg = FPTOLB.I(in:(int)reg) with %out == %in cost 1; out:(int)reg = GETSP.I emit "mr %out, sp" cost 4; SETSP.I(in:(int)reg) emit "mr sp, %in" cost 4; out:(int)reg = ANY.I cost 1; out:(int)reg = COPYF.I(in:(float)reg) emit "stfsu %in, -4(sp)" emit "lwz %out, 0(sp)" emit "addi sp, sp, 4" cost 12; out:(double)reg = COPYL.D(in:(long)reg) emit "stwu %in.0, -4(sp)" emit "stwu %in.1, -4(sp)" emit "lfd %out, 0(sp)" emit "addi sp, sp, 8" cost 16; out:(long)reg = COPYD.L(in:(double)reg) emit "stfdu %in, -8(sp)" emit "lwz %out.0, 4(sp)" emit "lwz %out.1, 0(sp)" emit "addi sp, sp, 8" cost 16; /* Memory operations */ /* Stores */ STORE.D(addr:address, value:(double)reg) emit "stfd %value, %addr" cost 4; STORE.L(addr:address, value:(long)reg) emit "stw %value.0, 4+%addr" emit "stw %value.1, 0+%addr" cost 8; STORE.I(addr:address, value:(int)reg) emit "stw %value, %addr" cost 4; STOREH.I(addr:address, value:(int)ushortX) emit "sth %value, %addr" cost 4; STOREH.I(ADD.I(left:(int)reg, right:(int)reg), value:(int)ushortX) emit "sthx %value, %left, %right" cost 4; STOREB.I(addr:address, value:(int)ushortX) emit "sth %value, %addr" cost 4; STOREB.I(addr:address, value:(int)ubyteX) emit "stb %value, %addr" cost 4; STOREB.I(ADD.I(left:(int)reg, right:(int)reg), value:(int)ubyteX) emit "stbx %value, %left, %right" cost 4; /* Loads */ out:(int)reg = LOAD.I(addr:address) emit "lwz %out, %addr" cost 4; out:(long)reg = LOAD.L(addr:address) emit "lwz %out.0, 4+%addr" emit "lwz %out.1, 0+%addr" cost 8; out:(int)ushort0 = LOADH.I(addr:address) emit "lhz %out, %addr" cost 4; out:(int)ubyte0 = LOADB.I(addr:address) emit "lbz %out, %addr" cost 4; /* ubyte intrinsics */ out:(int)ubyteX = in:(int)ubyte0 with %out == %in emit "! ubyte0 -> ubyteX" cost 1; out:(int)ubyte0 = in:(int)ubyteX emit "andi %out, %in, 0xff ! ubyteX -> ubyte0" cost 4; out:(int)reg = in:(int)ubyte0 with %out == %in emit "! ubyte0 -> reg" cost 4; out:(int)ubyteX = in:(int)reg with %out == %in emit "! reg -> ubyteX" cost 1; /* ushort intrinsics */ out:(int)ushortX = in:(int)ushort0 with %out == %in emit "! ushort0 -> ushortX" cost 1; out:(int)ushort0 = in:(int)ushortX emit "andi %out, %in, 0xff ! ushortX -> ushort0" cost 4; out:(int)reg = in:(int)ushort0 with %out == %in emit "! ushort0 -> reg" cost 4; out:(int)ushortX = in:(int)reg with %out == %in emit "! reg -> ushortX" cost 1; /* Extensions and conversions */ out:(int)reg = EXTENDB.I(in:(int)reg) emit "extsb %out, %in" cost 4; out:(int)reg = EXTENDH.I(in:(int)reg) emit "extsh %out, %in" cost 4; out:(int)reg = FROMSI.I(in:(int)reg) with %out == %in emit "! FROMSI.I(int) -> int" cost 1; out:(int)reg = FROMUI.I(in:(int)reg) with %out == %in emit "! FROMUI.I(int) -> int" cost 1; out:(long)reg = FROMSI.L(in:(int)reg) emit "mr %out.0, %in" emit "srawi %out.1, %out.0, 31" cost 8; out:(ret)reg = FROMF.I(in:(dret)reg) with corrupted(volatile) emit "bl .fromf2i" cost 4; out:(ret)reg = FROMD.I(in:(dret)reg) with corrupted(volatile) emit "bl .fromd2i" cost 4; out:(lret)reg = FROMF.L(in:(fret)reg) with corrupted(volatile) emit "bl .fromf2l" cost 4; out:(dret)reg = FROMSI.D(in:(ret)reg) with corrupted(volatile) emit "bl .fromsi2d" cost 4; out:(fret)reg = FROMUI.F(in:(ret)reg) with corrupted(volatile) emit "bl .fromui2f" cost 4; out:(dret)reg = FROMUI.D(in:(ret)reg) with corrupted(volatile) emit "bl .fromui2d" cost 4; /* Locals */ out:(int)reg = in:LOCAL.I emit "addi %out, fp, $in" cost 4; address = in:LOCAL.I emit "$in(fp)"; /* Memory addressing modes */ address = ADD.I(addr:(int)reg, offset:CONST.I) when signed_constant(%offset, 16) emit "$offset(%addr)"; address = addr:(int)reg emit "0(%addr)"; /* Branches */ JUMP(addr:BLOCK.I) emit "b $addr" cost 4; CJUMPEQ(value:(cr)cr, PAIR(true:BLOCK.I, false:BLOCK.I)) emit "bc 12, 2, $true" /* IFTRUE EQ */ emit "b $false" cost 8; CJUMPLE(value:(cr)cr, PAIR(true:BLOCK.I, false:BLOCK.I)) emit "bc 4, 1, $true" /* IFFALSE GT */ emit "b $false" cost 8; CJUMPLT(value:(cr)cr, PAIR(true:BLOCK.I, false:BLOCK.I)) emit "bc 12, 0, $true" /* IFTRUE LT */ emit "b $false" cost 8; #define CALLLABEL(insn) \ insn (dest:LABEL.I) \ with corrupted(volatile) \ emit "bl $dest" \ cost 4; CALLLABEL(CALL) out:(int)reg = CALLLABEL(CALL.I) out:(long)reg = CALLLABEL(CALL.L) #define CALLINDIRECT(insn) \ insn (dest:(int)reg) \ with corrupted(volatile) \ emit "mtspr ctr, %dest" \ emit "bcctrl 20, 0, 0" \ cost 8; CALLINDIRECT(CALL) out:(int)reg = CALLINDIRECT(CALL.I) out:(long)reg = CALLINDIRECT(CALL.L) JUMP(dest:LABEL.I) emit "b $dest" cost 4; /* Comparisons */ cr:(cr)cr = COMPARESI.I(left:(int)reg, right:(int)reg) emit "cmp %cr, 0, %left, %right" cost 4; cr:(cr)cr = COMPARESI.I(left:(int)reg, right:CONST.I) when signed_constant(%right, 16) emit "cmpi %cr, 0, %left, $right" cost 4; cr:(cr)cr = COMPAREUI.I(left:(int)reg, right:(int)reg) emit "cmpl %cr, 0, %left, %right" cost 4; cr:(cr)cr = COMPAREUI.I(left:(int)reg, right:CONST.I) when signed_constant(%right, 16) emit "cmpli %cr, 0, %left, $right" cost 4; out:(cr)cr = COMPARESI.I(in:(cr)cr, result:CONST.I) when specific_constant(%result, 0) with %out == %in emit "! COMPARESI.I(cr, 0)" cost 4; /* Booleans */ out:(int)reg = IFEQ.I(in:(cr)cr) emit "mfcr %out" /* get cr0 */ emit "rlwinm %out, %out, [32-2], 2, 31" /* extract just EQ */ cost 8; out:(int)reg = IFEQ.I(in:(int)reg) emit "cntlzw %out, %in" /* returns 0..32 */ emit "rlwinm %out, %out, [32-5], 5, 31" /* if 32, return 1, otherwise 0 */ cost 8; out:(int)reg = IFLT.I(in:(cr)cr) emit "mfcr %out" /* get cr0 */ emit "andi. %out, %out, 1" /* leave just LT */ cost 8; out:(int)reg = IFLE.I(in:(cr)cr) emit "mfcr %out" /* get cr0 */ emit "andi. %out, %out, 5" /* leave just LT and EQ */ emit "cntlzw %out, %out" /* returns 0..32 */ emit "rlwinm %out, %out, [32-5], 5, 31" /* if 32, return 1, otherwise 0 */ emit "xori %out, %out, 1" /* negate */ cost 8; /* Conversions */ #if 0 out:(int)reg = CIU44(in:(int)reg) with %out == %in emit "! ciu44" cost 4; out:(int)reg = CUI44(in:(int)reg) with %out == %in emit "! cui44" cost 4; #endif /* ALU operations */ #define ALUR(name, instr) \ out:(int)reg = name(left:(int)reg, right:(int)reg) \ emit instr " %out, %left, %right" \ cost 4; \ #define ALUC(name, instr) \ out:(int)reg = name(left:(int)reg, right:CONST.I) \ when signed_constant(%right, 16) \ emit instr " %out, %left, $right" \ cost 4; \ #define ALUC_reversed(name, instr) \ out:(int)reg = name(left:CONST.I, right:(int)reg) \ when signed_constant(%left, 16) \ emit instr " %out, %right, $left" \ cost 4; \ #define ALUCC(name, instr) \ ALUC(name, instr) \ ALUC_reversed(name, instr) ALUR(ADD.I, "add") ALUCC(ADD.I, "addi") out:(int)reg = SUB.I(left:(int)reg, right:(int)reg) emit "subf %out, %left, %right" cost 4; out:(int)reg = SUB.I(left:(int)reg, right:CONST.I) emit "addi %out, %left, -[$right]" cost 4; out:(int)reg = MOD.I(left:(int)reg, right:(int)reg) emit "divw %out, %left, %right" emit "mullw %out, %out, %right" emit "subf %out, %out, %left" cost 12; out:(int)reg = MODU.I(left:(int)reg, right:(int)reg) emit "divwu %out, %left, %right" emit "mullw %out, %out, %right" emit "subf %out, %out, %left" cost 12; ALUR(MUL.I, "mullw") ALUCC(MUL.I, "mulli") ALUR(DIV.I, "divw") ALUR(DIVU.I, "divwu") ALUR(ASL.I, "slw") ALUR(ASR.I, "sraw") ALUR(LSL.I, "slw") ALUR(LSR.I, "srw") out:(int)reg = NEG.I(left:(int)reg) emit "neg %out, %left" cost 4; out:(int)reg = NOT.I(left:(int)reg) emit "cntlzw %out, %left" emit "rlwinm %out, %out, 32-5, 5, 31" cost 8; ALUR(AND.I, "and") ALUCC(AND.I, "andi.") ALUR(OR.I, "or") ALUCC(OR.I, "ori") ALUR(EOR.I, "xor") ALUCC(EOR.I, "xori") out:(int)reg = value:LABEL.I emit "la %out, $value" cost 4; out:(int)reg = value:BLOCK.I emit "la %out, $value" cost 4; out:(int)reg = value:CONST.I emit "li %out, $value" cost 8; /* FPU operations */ #define FPU4R(name, instr) \ out:(float)reg = name(left:(float)reg, right:(float)reg) \ emit instr " %out, %left, %right" \ cost 4; \ #define FPU8R(name, instr) \ out:(double)reg = name(left:(double)reg, right:(double)reg) \ emit instr " %out, %left, %right" \ cost 4; \ out:(float)reg = LOAD.F(addr:address) emit "lfs %out, %addr" cost 4; out:(double)reg = LOAD.D(addr:address) emit "lfd %out, %addr" cost 4; out:(float)reg = in:CONST.F when specific_constant(%in, 0) emit "la r0, .fd_00000000" emit "lfs %out, 0(r0)" cost 12; FPU4R(ADDF.F, "fadds") FPU8R(ADDF.D, "fadd") FPU4R(SUBF.F, "fsubs") FPU8R(SUBF.D, "fsub") FPU4R(MULF.F, "fmuls") FPU8R(MULF.D, "fmul") FPU4R(DIVF.F, "fdivs") FPU8R(DIVF.D, "fdiv") out:(float)reg = NEGF.F(left:(float)reg) emit "fneg %out, %left" cost 4; out:(double)reg = NEGF.D(left:(double)reg) emit "fneg %out, %left" cost 4; cr:(cr)cr = COMPAREF.I(left:(float)reg, right:(float)reg) emit "fcmpu %cr, %left, %right" cost 4; cr:(cr)cr = COMPARED.I(left:(double)reg, right:(double)reg) emit "fcmpu %cr, %left, %right" cost 4; /* vim: set sw=4 ts=4 expandtab : */