[PowerPC][lld] Account for additional X-Forms -> D-Form/DS-Forms load/stores when relaxing initial-exec to local-exec
D153645 added additional X-Form load/stores that can be generated for TLS accesses. However, these added instructions have not been accounted for in lld. As a result, lld does not know how to handle them and cannot relax initial-exec to local-exec when the initial-exec sequence contains these additional load/stores. This patch aims to resolve https://github.com/llvm/llvm-project/issues/64424. Differential Revision: https://reviews.llvm.org/D158197
This commit is contained in:
Amy Kwan
parent
07102a1194
commit
698b45aa90
@ -471,10 +471,14 @@ void PPC::relaxTlsIeToLe(uint8_t *loc, const Relocation &rel,
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if (insn >> 26 != 31)
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error("unrecognized instruction for IE to LE R_PPC_TLS");
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// addi rT, rT, x@tls --> addi rT, rT, x@tprel@l
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uint32_t dFormOp = getPPCDFormOp((read32(loc) & 0x000007fe) >> 1);
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if (dFormOp == 0)
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error("unrecognized instruction for IE to LE R_PPC_TLS");
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write32(loc, (dFormOp << 26) | (insn & 0x03ff0000) | lo(val));
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unsigned secondaryOp = (read32(loc) & 0x000007fe) >> 1;
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uint32_t dFormOp = getPPCDFormOp(secondaryOp);
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if (dFormOp == 0) { // Expecting a DS-Form instruction.
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dFormOp = getPPCDSFormOp(secondaryOp);
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if (dFormOp == 0)
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error("unrecognized instruction for IE to LE R_PPC_TLS");
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}
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write32(loc, (dFormOp | (insn & 0x03ff0000) | lo(val)));
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break;
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}
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default:
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@ -37,6 +37,12 @@ enum XFormOpcd {
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STHX = 407,
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STWX = 151,
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STDX = 149,
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LHAX = 343,
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LWAX = 341,
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LFSX = 535,
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LFDX = 599,
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STFSX = 663,
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STFDX = 727,
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ADD = 266,
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};
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@ -49,7 +55,6 @@ enum DFormOpcd {
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LWZ = 32,
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LWZU = 33,
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LFSU = 49,
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LD = 58,
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LFDU = 51,
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STB = 38,
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STBU = 39,
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@ -59,10 +64,20 @@ enum DFormOpcd {
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STWU = 37,
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STFSU = 53,
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STFDU = 55,
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STD = 62,
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LHA = 42,
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LFS = 48,
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LFD = 50,
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STFS = 52,
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STFD = 54,
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ADDI = 14
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};
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enum DSFormOpcd {
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LD = 58,
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LWA = 58,
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STD = 62
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};
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constexpr uint32_t NOP = 0x60000000;
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enum class PPCLegacyInsn : uint32_t {
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@ -825,26 +840,48 @@ void PPC64::relaxTlsLdToLe(uint8_t *loc, const Relocation &rel,
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}
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}
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// Map X-Form instructions to their DS-Form counterparts, if applicable.
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// The full encoding is returned here to distinguish between the different
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// DS-Form instructions.
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unsigned elf::getPPCDSFormOp(unsigned secondaryOp) {
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switch (secondaryOp) {
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case LWAX:
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return (LWA << 26) | 0x2;
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case LDX:
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return LD << 26;
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case STDX:
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return STD << 26;
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default:
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return 0;
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}
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}
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unsigned elf::getPPCDFormOp(unsigned secondaryOp) {
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switch (secondaryOp) {
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case LBZX:
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return LBZ;
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return LBZ << 26;
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case LHZX:
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return LHZ;
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return LHZ << 26;
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case LWZX:
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return LWZ;
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case LDX:
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return LD;
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return LWZ << 26;
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case STBX:
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return STB;
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return STB << 26;
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case STHX:
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return STH;
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return STH << 26;
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case STWX:
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return STW;
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case STDX:
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return STD;
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return STW << 26;
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case LHAX:
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return LHA << 26;
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case LFSX:
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return LFS << 26;
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case LFDX:
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return LFD << 26;
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case STFSX:
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return STFS << 26;
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case STFDX:
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return STFD << 26;
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case ADD:
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return ADDI;
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return ADDI << 26;
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default:
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return 0;
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}
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@ -898,10 +935,16 @@ void PPC64::relaxTlsIeToLe(uint8_t *loc, const Relocation &rel,
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error("unrecognized instruction for IE to LE R_PPC64_TLS");
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uint32_t secondaryOp = (read32(loc) & 0x000007FE) >> 1; // bits 21-30
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uint32_t dFormOp = getPPCDFormOp(secondaryOp);
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if (dFormOp == 0)
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error("unrecognized instruction for IE to LE R_PPC64_TLS");
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write32(loc, ((dFormOp << 26) | (read32(loc) & 0x03FFFFFF)));
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relocateNoSym(loc + offset, R_PPC64_TPREL16_LO, val);
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uint32_t finalReloc;
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if (dFormOp == 0) { // Expecting a DS-Form instruction.
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dFormOp = getPPCDSFormOp(secondaryOp);
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if (dFormOp == 0)
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error("unrecognized instruction for IE to LE R_PPC64_TLS");
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finalReloc = R_PPC64_TPREL16_LO_DS;
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} else
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finalReloc = R_PPC64_TPREL16_LO;
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write32(loc, dFormOp | (read32(loc) & 0x03ff0000));
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relocateNoSym(loc + offset, finalReloc, val);
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} else if (locAsInt % 4 == 1) {
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// If the offset is not 4 byte aligned then we have a PCRel type reloc.
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// This version of the relocation is offset by one byte from the
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@ -926,9 +969,12 @@ void PPC64::relaxTlsIeToLe(uint8_t *loc, const Relocation &rel,
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}
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} else {
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uint32_t dFormOp = getPPCDFormOp(secondaryOp);
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if (dFormOp == 0)
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errorOrWarn("unrecognized instruction for IE to LE R_PPC64_TLS");
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write32(loc - 1, ((dFormOp << 26) | (tlsInstr & 0x03FF0000)));
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if (dFormOp == 0) { // Expecting a DS-Form instruction.
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dFormOp = getPPCDSFormOp(secondaryOp);
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if (dFormOp == 0)
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errorOrWarn("unrecognized instruction for IE to LE R_PPC64_TLS");
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}
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write32(loc - 1, (dFormOp | (tlsInstr & 0x03ff0000)));
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}
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} else {
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errorOrWarn("R_PPC64_TLS must be either 4 byte aligned or one byte "
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@ -208,6 +208,7 @@ void processArmCmseSymbols();
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void writePPC32GlinkSection(uint8_t *buf, size_t numEntries);
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unsigned getPPCDFormOp(unsigned secondaryOp);
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unsigned getPPCDSFormOp(unsigned secondaryOp);
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// In the PowerPC64 Elf V2 abi a function can have 2 entry points. The first
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// is a global entry point (GEP) which typically is used to initialize the TOC
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@ -12,8 +12,8 @@
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# IE-REL: FLAGS STATIC_TLS
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## A non-preemptable symbol (b) has 0 st_shndx.
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# IE-REL: .rela.dyn {
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# IE-REL-NEXT: 0x20238 R_PPC_TPREL32 - 0xC
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# IE-REL-NEXT: 0x20234 R_PPC_TPREL32 a 0x0
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# IE-REL-NEXT: 0x20258 R_PPC_TPREL32 - 0xC
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# IE-REL-NEXT: 0x20254 R_PPC_TPREL32 a 0x0
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# IE-REL-NEXT: }
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## &.got[3] - _GLOBAL_OFFSET_TABLE_ = 12
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@ -44,6 +44,12 @@ lbzx 10, 8, c@tls
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# IE-NEXT: stbx 14, 4, 2
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# IE-NEXT: sthx 15, 5, 2
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# IE-NEXT: stwx 16, 6, 2
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# IE-NEXT: lhax 17, 7, 2
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# IE-NEXT: lwax 18, 8, 2
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# IE-NEXT: lfsx 19, 9, 2
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# IE-NEXT: lfdx 20, 10, 2
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# IE-NEXT: stfsx 21, 11, 2
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# IE-NEXT: stfdx 22, 12, 2
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## In LE, these X-Form instructions are changed to their corresponding D-Form.
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# LE-NEXT: lhz 12, -28660(2)
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@ -51,12 +57,26 @@ lbzx 10, 8, c@tls
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# LE-NEXT: stb 14, -28660(4)
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# LE-NEXT: sth 15, -28660(5)
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# LE-NEXT: stw 16, -28660(6)
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# LE-NEXT: lha 17, -28660(7)
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# LE-NEXT: lwa 18, -28660(8)
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# LE-NEXT: lfs 19, -28660(9)
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# LE-NEXT: lfd 20, -28660(10)
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# LE-NEXT: stfs 21, -28660(11)
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# LE-NEXT: stfd 22, -28660(12)
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lhzx 12, 2, s@tls
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lwzx 13, 3, i@tls
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stbx 14, 4, c@tls
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sthx 15, 5, s@tls
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stwx 16, 6, i@tls
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lhax 17, 7, s@tls
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lwax 18, 8, i@tls
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lfsx 19, 9, f@tls
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lfdx 20, 10, d@tls
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stfsx 21, 11, f@tls
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stfdx 22, 12, d@tls
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ldx 23, 13, l@tls
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stdx 24, 14, l@tls
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.section .tbss
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.globl a
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@ -66,3 +86,6 @@ a:
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c:
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s:
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i:
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f:
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d:
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l:
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@ -24,10 +24,12 @@
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# IE-REL: FLAGS STATIC_TLS
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# IE-REL: .rela.dyn {
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# IE-REL-NEXT: 0x204C8 R_PPC64_TPREL64 c 0x0
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# IE-REL-NEXT: 0x204D0 R_PPC64_TPREL64 s 0x0
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# IE-REL-NEXT: 0x204D8 R_PPC64_TPREL64 i 0x0
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# IE-REL-NEXT: 0x204E0 R_PPC64_TPREL64 l 0x0
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# IE-REL-NEXT: 0x205A8 R_PPC64_TPREL64 c 0x0
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# IE-REL-NEXT: 0x205B0 R_PPC64_TPREL64 s 0x0
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# IE-REL-NEXT: 0x205B8 R_PPC64_TPREL64 i 0x0
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# IE-REL-NEXT: 0x205C0 R_PPC64_TPREL64 l 0x0
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# IE-REL-NEXT: 0x205C8 R_PPC64_TPREL64 f 0x0
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# IE-REL-NEXT: 0x205D0 R_PPC64_TPREL64 d 0x0
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# IE-REL-NEXT: }
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# INPUT-REL: R_PPC64_GOT_TPREL16_HA c 0x0
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@ -152,10 +154,64 @@ test_ds:
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ld 4, l@got@tprel(2)
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stdx 3, 4, l@tls
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# LE-LABEL: <test_lhax>:
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# LE-NEXT: nop
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# LE-NEXT: addis 3, 13, 0
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# LE-NEXT: lha 3, -28670(3)
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test_lhax:
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addis 3, 2, s@got@tprel@ha
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ld 3, s@got@tprel@l(3)
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lhax 3, 3, s@tls
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# LE-LABEL: <test_lwax>:
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# LE-NEXT: nop
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# LE-NEXT: addis 3, 13, 0
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# LE-NEXT: lwa 3, -28668(3)
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test_lwax:
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addis 3, 2, i@got@tprel@ha
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ld 3, i@got@tprel@l(3)
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lwax 3, 3, i@tls
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# LE-LABEL: <test_lfsx>:
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# LE-NEXT: nop
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# LE-NEXT: addis 3, 13, 0
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# LE-NEXT: lfs 3, -28656(3)
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test_lfsx:
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addis 3, 2, f@got@tprel@ha
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ld 3, f@got@tprel@l(3)
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lfsx 3, 3, f@tls
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# LE-LABEL: <test_lfdx>:
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# LE-NEXT: nop
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# LE-NEXT: addis 3, 13, 0
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# LE-NEXT: lfd 3, -28648(3)
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test_lfdx:
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addis 3, 2, d@got@tprel@ha
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ld 3, d@got@tprel@l(3)
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lfdx 3, 3, d@tls
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# LE-LABEL: <test_stfsx>:
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# LE-NEXT: nop
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# LE-NEXT: addis 4, 13, 0
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# LE-NEXT: stfs 3, -28656(4)
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test_stfsx:
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addis 4, 2, f@got@tprel@ha
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ld 4, f@got@tprel@l(4)
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stfsx 3, 4, f@tls
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# LE-LABEL: <test_stfdx>:
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# LE-NEXT: nop
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# LE-NEXT: addis 4, 13, 0
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# LE-NEXT: stfd 3, -28648(4)
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test_stfdx:
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addis 4, 2, d@got@tprel@ha
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ld 4, d@got@tprel@l(4)
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stfdx 3, 4, d@tls
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# NOREL: There are no relocations in this file.
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.section .tdata,"awT",@progbits
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.globl c, s, i, l
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.globl c, s, i, l, f, d
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c:
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.byte 97
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@ -170,3 +226,9 @@ i:
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.p2align 3
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l:
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.quad 55
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f:
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.long 55
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.p2align 3
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d:
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.quad 55
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@ -29,6 +29,12 @@ SECTIONS {
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.text_val 0x1002000 : { *(.text_val) }
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.text_twoval 0x1003000 : { *(.text_twoval) }
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.text_incrval 0x1004000 : { *(.text_incrval) }
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.text_incrval_half 0x1005000 : { *(.text_incrval_half) }
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.text_incrval_word 0x1006000 : { *(.text_incrval_word) }
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.text_incrval_float 0x1007000 : { *(.text_incrval_float) }
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.text_incrval_double 0x1008000 : { *(.text_incrval_double) }
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.text_incrval_dword 0x1009000 : { *(.text_incrval_dword) }
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.text_incrval_half_zero 0x1010000 : { *(.text_incrval_half_zero) }
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}
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#--- defs
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@ -42,26 +48,26 @@ y:
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#--- asm
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# IE-RELOC: Relocation section '.rela.dyn' at offset 0x10090 contains 2 entries:
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# IE-RELOC: 00000000010040f0 0000000100000049 R_PPC64_TPREL64 0000000000000000 x + 0
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# IE-RELOC: 00000000010040f8 0000000200000049 R_PPC64_TPREL64 0000000000000000 y + 0
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# IE-RELOC: 00000000010100f0 0000000100000049 R_PPC64_TPREL64 0000000000000000 x + 0
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# IE-RELOC-NEXT: 00000000010100f8 0000000200000049 R_PPC64_TPREL64 0000000000000000 y + 0
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# IE-SYM: Symbol table '.dynsym' contains 3 entries:
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# IE-SYM: 1: 0000000000000000 0 TLS GLOBAL DEFAULT UND x
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# IE-SYM: 2: 0000000000000000 0 TLS GLOBAL DEFAULT UND y
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# IE-GOT: Hex dump of section '.got':
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# IE-GOT-NEXT: 0x010040e8 e8c00001 00000000 00000000 00000000
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# IE-GOT-NEXT: 0x010100e8 e8800101 00000000 00000000 00000000
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# LE-RELOC: There are no relocations in this file.
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# LE-SYM: Symbol table '.symtab' contains 8 entries:
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# LE-SYM: 6: 0000000000000000 0 TLS GLOBAL DEFAULT 6 x
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# LE-SYM: 7: 0000000000000004 0 TLS GLOBAL DEFAULT 6 y
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# LE-SYM: Symbol table '.symtab' contains 14 entries:
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# LE-SYM: 0000000000000000 0 TLS GLOBAL DEFAULT [[#]] x
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# LE-SYM: 0000000000000004 0 TLS GLOBAL DEFAULT [[#]] y
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# LE-GOT: could not find section '.got'
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# IE-LABEL: <IEAddr>:
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# IE-NEXT: pld 3, 12528(0), 1
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# IE-NEXT: pld 3, 61680(0), 1
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# IE-NEXT: add 3, 3, 13
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# IE-NEXT: blr
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# LE-LABEL: <IEAddr>:
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@ -75,7 +81,7 @@ IEAddr:
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blr
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# IE-LABEL: <IEAddrCopy>:
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# IE-NEXT: pld 3, 12512(0), 1
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# IE-NEXT: pld 3, 61664(0), 1
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# IE-NEXT: add 4, 3, 13
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# IE-NEXT: blr
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# LE-LABEL: <IEAddrCopy>:
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@ -89,7 +95,7 @@ IEAddrCopy:
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blr
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# IE-LABEL: <IEVal>:
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# IE-NEXT: pld 3, 8432(0), 1
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# IE-NEXT: pld 3, 57584(0), 1
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# IE-NEXT: lwzx 3, 3, 13
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# IE-NEXT: blr
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# LE-LABEL: <IEVal>:
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@ -103,8 +109,8 @@ IEVal:
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blr
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# IE-LABEL: <IETwoVal>:
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# IE-NEXT: pld 3, 4336(0), 1
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# IE-NEXT: pld 4, 4336(0), 1
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# IE-NEXT: pld 3, 53488(0), 1
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# IE-NEXT: pld 4, 53488(0), 1
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# IE-NEXT: lwzx 3, 3, 13
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# IE-NEXT: lwzx 4, 4, 13
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# IE-NEXT: blr
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@ -123,7 +129,7 @@ IETwoVal:
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blr
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# IE-LABEL: <IEIncrementVal>:
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# IE-NEXT: pld 4, 248(0), 1
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# IE-NEXT: pld 4, 49400(0), 1
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# IE-NEXT: lwzx 3, 4, 13
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# IE-NEXT: stwx 3, 4, 13
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# IE-NEXT: blr
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@ -138,3 +144,105 @@ IEIncrementVal:
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lwzx 3, 4, y@tls@pcrel
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stwx 3, 4, y@tls@pcrel
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blr
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# IE-LABEL: <IEIncrementValHalf>:
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# IE-NEXT: pld 4, 45304(0), 1
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# IE-NEXT: lhax 3, 4, 13
|
||||
# IE-NEXT: sthx 3, 4, 13
|
||||
# IE-NEXT: blr
|
||||
# LE-LABEL: <IEIncrementValHalf>:
|
||||
# LE-NEXT: paddi 4, 13, -28668, 0
|
||||
# LE-NEXT: lha 3, 0(4)
|
||||
# LE-NEXT: sth 3, 0(4)
|
||||
# LE-NEXT: blr
|
||||
.section .text_incrval_half, "ax", %progbits
|
||||
IEIncrementValHalf:
|
||||
pld 4, y@got@tprel@pcrel(0), 1
|
||||
lhax 3, 4, y@tls@pcrel
|
||||
sthx 3, 4, y@tls@pcrel
|
||||
blr
|
||||
|
||||
# IE-LABEL: <IEIncrementValWord>:
|
||||
# IE-NEXT: pld 4, 41208(0), 1
|
||||
# IE-NEXT: lwax 3, 4, 13
|
||||
# IE-NEXT: stwx 3, 4, 13
|
||||
# IE-NEXT: blr
|
||||
# LE-LABEL: <IEIncrementValWord>:
|
||||
# LE-NEXT: paddi 4, 13, -28668, 0
|
||||
# LE-NEXT: lwa 3, 0(4)
|
||||
# LE-NEXT: stw 3, 0(4)
|
||||
# LE-NEXT: blr
|
||||
.section .text_incrval_word, "ax", %progbits
|
||||
IEIncrementValWord:
|
||||
pld 4, y@got@tprel@pcrel(0), 1
|
||||
lwax 3, 4, y@tls@pcrel
|
||||
stwx 3, 4, y@tls@pcrel
|
||||
blr
|
||||
|
||||
# IE-LABEL: <IEIncrementValFloat>:
|
||||
# IE-NEXT: pld 4, 37112(0), 1
|
||||
# IE-NEXT: lfsx 3, 4, 13
|
||||
# IE-NEXT: stfsx 3, 4, 13
|
||||
# IE-NEXT: blr
|
||||
# LE-LABEL: <IEIncrementValFloat>:
|
||||
# LE-NEXT: paddi 4, 13, -28668, 0
|
||||
# LE-NEXT: lfs 3, 0(4)
|
||||
# LE-NEXT: stfs 3, 0(4)
|
||||
# LE-NEXT: blr
|
||||
.section .text_incrval_float, "ax", %progbits
|
||||
IEIncrementValFloat:
|
||||
pld 4, y@got@tprel@pcrel(0), 1
|
||||
lfsx 3, 4, y@tls@pcrel
|
||||
stfsx 3, 4, y@tls@pcrel
|
||||
blr
|
||||
|
||||
# IE-LABEL: <IEIncrementValDouble>:
|
||||
# IE-NEXT: pld 4, 33016(0), 1
|
||||
# IE-NEXT: lfdx 3, 4, 13
|
||||
# IE-NEXT: stfdx 3, 4, 13
|
||||
# IE-NEXT: blr
|
||||
# LE-LABEL: <IEIncrementValDouble>:
|
||||
# LE-NEXT: paddi 4, 13, -28668, 0
|
||||
# LE-NEXT: lfd 3, 0(4)
|
||||
# LE-NEXT: stfd 3, 0(4)
|
||||
# LE-NEXT: blr
|
||||
.section .text_incrval_double, "ax", %progbits
|
||||
IEIncrementValDouble:
|
||||
pld 4, y@got@tprel@pcrel(0), 1
|
||||
lfdx 3, 4, y@tls@pcrel
|
||||
stfdx 3, 4, y@tls@pcrel
|
||||
blr
|
||||
|
||||
# IE-LABEL: <IEIncrementValDword>:
|
||||
# IE-NEXT: pld 4, 28920(0), 1
|
||||
# IE-NEXT: ldx 3, 4, 13
|
||||
# IE-NEXT: stdx 3, 4, 13
|
||||
# IE-NEXT: blr
|
||||
# LE-LABEL: <IEIncrementValDword>:
|
||||
# LE-NEXT: paddi 4, 13, -28668, 0
|
||||
# LE-NEXT: ld 3, 0(4)
|
||||
# LE-NEXT: std 3, 0(4)
|
||||
# LE-NEXT: blr
|
||||
.section .text_incrval_dword, "ax", %progbits
|
||||
IEIncrementValDword:
|
||||
pld 4, y@got@tprel@pcrel(0), 1
|
||||
ldx 3, 4, y@tls@pcrel
|
||||
stdx 3, 4, y@tls@pcrel
|
||||
blr
|
||||
|
||||
# IE-LABEL: <IEIncrementValHalfZero>:
|
||||
# IE-NEXT: pld 4, 248(0), 1
|
||||
# IE-NEXT: lhzx 3, 4, 13
|
||||
# IE-NEXT: sthx 3, 4, 13
|
||||
# IE-NEXT: blr
|
||||
# LE-LABEL: <IEIncrementValHalfZero>:
|
||||
# LE-NEXT: paddi 4, 13, -28668, 0
|
||||
# LE-NEXT: lhz 3, 0(4)
|
||||
# LE-NEXT: sth 3, 0(4)
|
||||
# LE-NEXT: blr
|
||||
.section .text_incrval_half_zero, "ax", %progbits
|
||||
IEIncrementValHalfZero:
|
||||
pld 4, y@got@tprel@pcrel(0), 1
|
||||
lhzx 3, 4, y@tls@pcrel
|
||||
sthx 3, 4, y@tls@pcrel
|
||||
blr
|
||||
|
||||
Loading…
x
Reference in New Issue
Block a user