diff options
Diffstat (limited to 'llvm/lib/Target/RISCV/MCTargetDesc/RISCVAsmBackend.cpp')
| -rw-r--r-- | llvm/lib/Target/RISCV/MCTargetDesc/RISCVAsmBackend.cpp | 42 |
1 files changed, 40 insertions, 2 deletions
diff --git a/llvm/lib/Target/RISCV/MCTargetDesc/RISCVAsmBackend.cpp b/llvm/lib/Target/RISCV/MCTargetDesc/RISCVAsmBackend.cpp index e4e17bed5af..b91467fe145 100644 --- a/llvm/lib/Target/RISCV/MCTargetDesc/RISCVAsmBackend.cpp +++ b/llvm/lib/Target/RISCV/MCTargetDesc/RISCVAsmBackend.cpp @@ -63,7 +63,9 @@ public: { "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_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) @@ -152,10 +154,45 @@ static uint64_t adjustFixupValue(const MCFixup &Fixup, uint64_t Value, Value = (Sbit << 31) | (Mid6 << 25) | (Lo4 << 8) | (Hi1 << 7); return Value; } + case RISCV::fixup_riscv_rvc_jump: { + // Need to produce offset[11|4|9:8|10|6|7|3:1|5] from the 11-bit Value. + unsigned Bit11 = (Value >> 11) & 0x1; + unsigned Bit4 = (Value >> 4) & 0x1; + unsigned Bit9_8 = (Value >> 8) & 0x3; + unsigned Bit10 = (Value >> 10) & 0x1; + unsigned Bit6 = (Value >> 6) & 0x1; + unsigned Bit7 = (Value >> 7) & 0x1; + unsigned Bit3_1 = (Value >> 1) & 0x7; + unsigned Bit5 = (Value >> 5) & 0x1; + Value = (Bit11 << 10) | (Bit4 << 9) | (Bit9_8 << 7) | (Bit10 << 6) | + (Bit6 << 5) | (Bit7 << 4) | (Bit3_1 << 1) | Bit5; + return Value; + } + case RISCV::fixup_riscv_rvc_branch: { + // Need to produce offset[8|4:3], [reg 3 bit], offset[7:6|2:1|5] + unsigned Bit8 = (Value >> 8) & 0x1; + unsigned Bit7_6 = (Value >> 6) & 0x3; + unsigned Bit5 = (Value >> 5) & 0x1; + unsigned Bit4_3 = (Value >> 3) & 0x3; + unsigned Bit2_1 = (Value >> 1) & 0x3; + Value = (Bit8 << 12) | (Bit4_3 << 10) | (Bit7_6 << 5) | (Bit2_1 << 3) | + (Bit5 << 2); + return Value; + } } } +static unsigned getSize(unsigned Kind) { + switch (Kind) { + default: + return 4; + case RISCV::fixup_riscv_rvc_jump: + case RISCV::fixup_riscv_rvc_branch: + return 2; + } +} + void RISCVAsmBackend::applyFixup(const MCAssembler &Asm, const MCFixup &Fixup, const MCValue &Target, MutableArrayRef<char> Data, uint64_t Value, @@ -171,6 +208,7 @@ void RISCVAsmBackend::applyFixup(const MCAssembler &Asm, const MCFixup &Fixup, Value <<= Info.TargetOffset; unsigned Offset = Fixup.getOffset(); + unsigned FullSize = getSize(Fixup.getKind()); #ifndef NDEBUG unsigned NumBytes = (Info.TargetSize + 7) / 8; @@ -179,7 +217,7 @@ void RISCVAsmBackend::applyFixup(const MCAssembler &Asm, const MCFixup &Fixup, // For each byte of the fragment that the fixup touches, mask in the // bits from the fixup value. - for (unsigned i = 0; i != 4; ++i) { + for (unsigned i = 0; i != FullSize; ++i) { Data[Offset + i] |= uint8_t((Value >> (i * 8)) & 0xff); } } |
