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[RISCV] Add support for %pcrel_lo. 

llvm-svn: 324303
This commit is contained in:
Ahmed Charles 2018-02-06 00:55:23 +00:00
parent 1fbf7abcc9
commit 646ab87bb4
9 changed files with 65 additions and 12 deletions
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5
llvm/lib/Target/RISCV/AsmParser/RISCVAsmParser.cpp
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@ -334,8 +334,9 @@ public:
IsValid = RISCVAsmParser::classifySymbolRef(getImm(), VK, Imm);
else
IsValid = isInt<12>(Imm);
return IsValid &&
(VK == RISCVMCExpr::VK_RISCV_None || VK == RISCVMCExpr::VK_RISCV_LO);
return IsValid && (VK == RISCVMCExpr::VK_RISCV_None ||
VK == RISCVMCExpr::VK_RISCV_LO ||
VK == RISCVMCExpr::VK_RISCV_PCREL_LO);
}
bool isSImm12Lsb0() const { return isBareSimmNLsb0<12>(); }

22
llvm/lib/Target/RISCV/MCTargetDesc/RISCVAsmBackend.cpp
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@ -58,15 +58,17 @@ public:
// This table *must* be in the order that the fixup_* kinds are defined in
// RISCVFixupKinds.h.
//
// name offset bits flags
{ "fixup_riscv_hi20", 12, 20, 0 },
{ "fixup_riscv_lo12_i", 20, 12, 0 },
{ "fixup_riscv_lo12_s", 0, 32, 0 },
{ "fixup_riscv_pcrel_hi20", 12, 20, MCFixupKindInfo::FKF_IsPCRel },
{ "fixup_riscv_jal", 12, 20, MCFixupKindInfo::FKF_IsPCRel },
{ "fixup_riscv_branch", 0, 32, MCFixupKindInfo::FKF_IsPCRel },
{ "fixup_riscv_rvc_jump", 2, 11, MCFixupKindInfo::FKF_IsPCRel },
{ "fixup_riscv_rvc_branch", 0, 16, MCFixupKindInfo::FKF_IsPCRel }
// name offset bits flags
{ "fixup_riscv_hi20", 12, 20, 0 },
{ "fixup_riscv_lo12_i", 20, 12, 0 },
{ "fixup_riscv_lo12_s", 0, 32, 0 },
{ "fixup_riscv_pcrel_hi20", 12, 20, MCFixupKindInfo::FKF_IsPCRel },
{ "fixup_riscv_pcrel_lo12_i", 20, 12, MCFixupKindInfo::FKF_IsPCRel },
{ "fixup_riscv_pcrel_lo12_s", 0, 32, MCFixupKindInfo::FKF_IsPCRel },
{ "fixup_riscv_jal", 12, 20, MCFixupKindInfo::FKF_IsPCRel },
{ "fixup_riscv_branch", 0, 32, MCFixupKindInfo::FKF_IsPCRel },
{ "fixup_riscv_rvc_jump", 2, 11, MCFixupKindInfo::FKF_IsPCRel },
{ "fixup_riscv_rvc_branch", 0, 16, MCFixupKindInfo::FKF_IsPCRel }
};
if (Kind < FirstTargetFixupKind)
@ -122,8 +124,10 @@ static uint64_t adjustFixupValue(const MCFixup &Fixup, uint64_t Value,
case FK_Data_8:
return Value;
case RISCV::fixup_riscv_lo12_i:
case RISCV::fixup_riscv_pcrel_lo12_i:
return Value & 0xfff;
case RISCV::fixup_riscv_lo12_s:
case RISCV::fixup_riscv_pcrel_lo12_s:
return (((Value >> 5) & 0x7f) << 25) | ((Value & 0x1f) << 7);
case RISCV::fixup_riscv_hi20:
case RISCV::fixup_riscv_pcrel_hi20:

4
llvm/lib/Target/RISCV/MCTargetDesc/RISCVELFObjectWriter.cpp
View File

@ -55,6 +55,10 @@ unsigned RISCVELFObjectWriter::getRelocType(MCContext &Ctx,
return ELF::R_RISCV_LO12_S;
case RISCV::fixup_riscv_pcrel_hi20:
return ELF::R_RISCV_PCREL_HI20;
case RISCV::fixup_riscv_pcrel_lo12_i:
return ELF::R_RISCV_PCREL_LO12_I;
case RISCV::fixup_riscv_pcrel_lo12_s:
return ELF::R_RISCV_PCREL_LO12_S;
case RISCV::fixup_riscv_jal:
return ELF::R_RISCV_JAL;
case RISCV::fixup_riscv_branch:

6
llvm/lib/Target/RISCV/MCTargetDesc/RISCVFixupKinds.h
View File

@ -29,6 +29,12 @@ enum Fixups {
// fixup_riscv_pcrel_hi20 - 20-bit fixup corresponding to pcrel_hi(foo) for
// instructions like auipc
fixup_riscv_pcrel_hi20,
// fixup_riscv_pcrel_lo12_i - 12-bit fixup corresponding to pcrel_lo(foo) for
// instructions like addi
fixup_riscv_pcrel_lo12_i,
// fixup_riscv_pcrel_lo12_s - 12-bit fixup corresponding to pcrel_lo(foo) for
// the S-type store instructions
fixup_riscv_pcrel_lo12_s,
// fixup_riscv_jal - 20-bit fixup for symbol references in the jal
// instruction
fixup_riscv_jal,

5
llvm/lib/Target/RISCV/MCTargetDesc/RISCVMCCodeEmitter.cpp
View File

@ -167,6 +167,11 @@ unsigned RISCVMCCodeEmitter::getImmOpValue(const MCInst &MI, unsigned OpNo,
case RISCVMCExpr::VK_RISCV_HI:
FixupKind = RISCV::fixup_riscv_hi20;
break;
case RISCVMCExpr::VK_RISCV_PCREL_LO:
FixupKind = MIFrm == RISCVII::InstFormatI
? RISCV::fixup_riscv_pcrel_lo12_i
: RISCV::fixup_riscv_pcrel_lo12_s;
break;
case RISCVMCExpr::VK_RISCV_PCREL_HI:
FixupKind = RISCV::fixup_riscv_pcrel_hi20;
break;

5
llvm/lib/Target/RISCV/MCTargetDesc/RISCVMCExpr.cpp
View File

@ -53,6 +53,7 @@ RISCVMCExpr::VariantKind RISCVMCExpr::getVariantKindForName(StringRef name) {
return StringSwitch<RISCVMCExpr::VariantKind>(name)
.Case("lo", VK_RISCV_LO)
.Case("hi", VK_RISCV_HI)
.Case("pcrel_lo", VK_RISCV_PCREL_LO)
.Case("pcrel_hi", VK_RISCV_PCREL_HI)
.Default(VK_RISCV_Invalid);
}
@ -65,6 +66,8 @@ StringRef RISCVMCExpr::getVariantKindName(VariantKind Kind) {
return "lo";
case VK_RISCV_HI:
return "hi";
case VK_RISCV_PCREL_LO:
return "pcrel_lo";
case VK_RISCV_PCREL_HI:
return "pcrel_hi";
}
@ -73,7 +76,7 @@ StringRef RISCVMCExpr::getVariantKindName(VariantKind Kind) {
bool RISCVMCExpr::evaluateAsConstant(int64_t &Res) const {
MCValue Value;
if (Kind == VK_RISCV_PCREL_HI)
if (Kind == VK_RISCV_PCREL_HI || Kind == VK_RISCV_PCREL_LO)
return false;
if (!getSubExpr()->evaluateAsRelocatable(Value, nullptr, nullptr))

1
llvm/lib/Target/RISCV/MCTargetDesc/RISCVMCExpr.h
View File

@ -26,6 +26,7 @@ public:
VK_RISCV_None,
VK_RISCV_LO,
VK_RISCV_HI,
VK_RISCV_PCREL_LO,
VK_RISCV_PCREL_HI,
VK_RISCV_Invalid
};

20
llvm/test/MC/RISCV/relocations.s
View File

@ -54,6 +54,26 @@ auipc t1, %pcrel_hi(foo+4)
# INSTR: auipc t1, %pcrel_hi(foo+4)
# FIXUP: fixup A - offset: 0, value: %pcrel_hi(foo+4), kind: fixup_riscv_pcrel_hi20
addi t1, t1, %pcrel_lo(foo)
# RELOC: R_RISCV_PCREL_LO12_I foo 0x0
# INSTR: addi t1, t1, %pcrel_lo(foo)
# FIXUP: fixup A - offset: 0, value: %pcrel_lo(foo), kind: fixup_riscv_pcrel_lo12_i
addi t1, t1, %pcrel_lo(foo+4)
# RELOC: R_RISCV_PCREL_LO12_I foo 0x4
# INSTR: addi t1, t1, %pcrel_lo(foo+4)
# FIXUP: fixup A - offset: 0, value: %pcrel_lo(foo+4), kind: fixup_riscv_pcrel_lo12_i
sb t1, %pcrel_lo(foo)(a2)
# RELOC: R_RISCV_PCREL_LO12_S foo 0x0
# INSTR: sb t1, %pcrel_lo(foo)(a2)
# FIXUP: fixup A - offset: 0, value: %pcrel_lo(foo), kind: fixup_riscv_pcrel_lo12_s
sb t1, %pcrel_lo(foo+4)(a2)
# RELOC: R_RISCV_PCREL_LO12_S foo 0x4
# INSTR: sb t1, %pcrel_lo(foo+4)(a2)
# FIXUP: fixup A - offset: 0, value: %pcrel_lo(foo+4), kind: fixup_riscv_pcrel_lo12_s
jal zero, foo
# RELOC: R_RISCV_JAL
# INSTR: jal zero, foo

9
llvm/test/MC/RISCV/rv32i-invalid.s
View File

@ -53,6 +53,7 @@ jal gp, 1 # CHECK: :[[@LINE]]:9: error: immediate must be a multiple of 2 bytes
fence %hi(iorw), iorw # CHECK: :[[@LINE]]:7: error: operand must be formed of letters selected in-order from 'iorw'
fence %lo(iorw), iorw # CHECK: :[[@LINE]]:7: error: operand must be formed of letters selected in-order from 'iorw'
fence %pcrel_hi(iorw), iorw # CHECK: :[[@LINE]]:7: error: operand must be formed of letters selected in-order from 'iorw'
fence %pcrel_lo(iorw), iorw # CHECK: :[[@LINE]]:7: error: operand must be formed of letters selected in-order from 'iorw'
## uimm5
slli a0, a0, %lo(1) # CHECK: :[[@LINE]]:14: error: immediate must be an integer in the range [0, 31]
@ -61,6 +62,8 @@ srai a0, a0, %hi(2) # CHECK: :[[@LINE]]:14: error: immediate must be an integer
csrrwi a1, 0x1, %hi(b) # CHECK: :[[@LINE]]:17: error: immediate must be an integer in the range [0, 31]
csrrsi t1, 999, %pcrel_hi(3) # CHECK: :[[@LINE]]:17: error: immediate must be an integer in the range [0, 31]
csrrci x0, 43, %pcrel_hi(c) # CHECK: :[[@LINE]]:16: error: immediate must be an integer in the range [0, 31]
csrrsi t1, 999, %pcrel_lo(4) # CHECK: :[[@LINE]]:17: error: immediate must be an integer in the range [0, 31]
csrrci x0, 43, %pcrel_lo(d) # CHECK: :[[@LINE]]:16: error: immediate must be an integer in the range [0, 31]
## simm12
ori a0, a1, %hi(foo) # CHECK: :[[@LINE]]:13: error: immediate must be an integer in the range [-2048, 2047]
@ -74,6 +77,8 @@ csrrs a0, %hi(2), a0 # CHECK: :[[@LINE]]:11: error: immediate must be an integer
csrrc a0, %hi(b), a0 # CHECK: :[[@LINE]]:11: error: immediate must be an integer in the range [0, 4095]
csrrwi a0, %pcrel_hi(3), 0 # CHECK: :[[@LINE]]:12: error: immediate must be an integer in the range [0, 4095]
csrrsi a0, %pcrel_hi(c), a0 # CHECK: :[[@LINE]]:12: error: immediate must be an integer in the range [0, 4095]
csrrwi a0, %pcrel_lo(4), 0 # CHECK: :[[@LINE]]:12: error: immediate must be an integer in the range [0, 4095]
csrrsi a0, %pcrel_lo(d), a0 # CHECK: :[[@LINE]]:12: error: immediate must be an integer in the range [0, 4095]
## simm13_lsb0
beq t0, t1, %lo(1) # CHECK: :[[@LINE]]:13: error: immediate must be a multiple of 2 bytes in the range [-4096, 4094]
@ -82,6 +87,8 @@ blt t0, t1, %hi(2) # CHECK: :[[@LINE]]:13: error: immediate must be a multiple o
bge t0, t1, %hi(b) # CHECK: :[[@LINE]]:13: error: immediate must be a multiple of 2 bytes in the range [-4096, 4094]
bltu t0, t1, %pcrel_hi(3) # CHECK: :[[@LINE]]:14: error: immediate must be a multiple of 2 bytes in the range [-4096, 4094]
bgeu t0, t1, %pcrel_hi(c) # CHECK: :[[@LINE]]:14: error: immediate must be a multiple of 2 bytes in the range [-4096, 4094]
bltu t0, t1, %pcrel_lo(4) # CHECK: :[[@LINE]]:14: error: immediate must be a multiple of 2 bytes in the range [-4096, 4094]
bgeu t0, t1, %pcrel_lo(d) # CHECK: :[[@LINE]]:14: error: immediate must be a multiple of 2 bytes in the range [-4096, 4094]
## uimm20
lui a0, %lo(1) # CHECK: :[[@LINE]]:9: error: immediate must be an integer in the range [0, 1048575]
@ -94,6 +101,8 @@ jal gp, %hi(2) # CHECK: :[[@LINE]]:9: error: immediate must be a multiple of 2 b
jal gp, %hi(b) # CHECK: :[[@LINE]]:9: error: immediate must be a multiple of 2 bytes in the range [-1048576, 1048574]
jal gp, %pcrel_hi(3) # CHECK: :[[@LINE]]:9: error: immediate must be a multiple of 2 bytes in the range [-1048576, 1048574]
jal gp, %pcrel_hi(c) # CHECK: :[[@LINE]]:9: error: immediate must be a multiple of 2 bytes in the range [-1048576, 1048574]
jal gp, %pcrel_lo(4) # CHECK: :[[@LINE]]:9: error: immediate must be a multiple of 2 bytes in the range [-1048576, 1048574]
jal gp, %pcrel_lo(d) # CHECK: :[[@LINE]]:9: error: immediate must be a multiple of 2 bytes in the range [-1048576, 1048574]
# Unrecognized operand modifier
addi t0, sp, %modifer(255) # CHECK: :[[@LINE]]:15: error: unrecognized operand modifier