DataHoarder
d20dd880ce
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continuous-integration/drone/push Build is passing
95 lines
2.6 KiB
Go
95 lines
2.6 KiB
Go
//go:build unix && amd64 && !disable_jit && !purego
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package randomx
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import (
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"encoding/binary"
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"unsafe"
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)
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//go:noescape
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func superscalar_run(rf, jmp uintptr)
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func (f SuperScalarProgramFunc) Execute(rf uintptr) {
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if f == nil {
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panic("program is nil")
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}
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superscalar_run(rf, uintptr(unsafe.Pointer(unsafe.SliceData(f))))
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}
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// generateSuperscalarCode
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func generateSuperscalarCode(scalarProgram SuperScalarProgram) SuperScalarProgramFunc {
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var program []byte
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p := scalarProgram.Program()
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for i := range p {
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instr := &p[i]
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dst := instr.Dst_Reg % RegistersCount
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src := instr.Src_Reg % RegistersCount
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switch instr.Opcode {
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case S_ISUB_R:
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program = append(program, REX_SUB_RR...)
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program = append(program, byte(0xc0+8*dst+src))
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case S_IXOR_R:
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program = append(program, REX_XOR_RR...)
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program = append(program, byte(0xc0+8*dst+src))
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case S_IADD_RS:
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program = append(program, REX_LEA...)
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program = append(program,
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byte(0x04+8*dst),
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genSIB(int(instr.Imm32), src, dst),
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)
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case S_IMUL_R:
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program = append(program, REX_IMUL_RR...)
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program = append(program, byte(0xc0+8*dst+src))
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case S_IROR_C:
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program = append(program, REX_ROT_I8...)
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program = append(program,
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byte(0xc8+dst),
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byte(instr.Imm32&63),
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)
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case S_IADD_C7, S_IADD_C8, S_IADD_C9:
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program = append(program, REX_81...)
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program = append(program, byte(0xc0+dst))
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program = binary.LittleEndian.AppendUint32(program, instr.Imm32)
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//TODO: align NOP on C8/C9
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case S_IXOR_C7, S_IXOR_C8, S_IXOR_C9:
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program = append(program, REX_XOR_RI...)
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program = append(program, byte(0xf0+dst))
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program = binary.LittleEndian.AppendUint32(program, instr.Imm32)
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//TODO: align NOP on C8/C9
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case S_IMULH_R:
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program = append(program, REX_MOV_RR64...)
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program = append(program, byte(0xc0+dst))
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program = append(program, REX_MUL_R...)
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program = append(program, byte(0xe0+src))
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program = append(program, REX_MOV_R64R...)
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program = append(program, byte(0xc2+8*dst))
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case S_ISMULH_R:
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program = append(program, REX_MOV_RR64...)
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program = append(program, byte(0xc0+dst))
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program = append(program, REX_MUL_R...)
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program = append(program, byte(0xe8+src))
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program = append(program, REX_MOV_R64R...)
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program = append(program, byte(0xc2+8*dst))
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case S_IMUL_RCP:
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program = append(program, MOV_RAX_I...)
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program = binary.LittleEndian.AppendUint64(program, randomx_reciprocal(instr.Imm32))
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program = append(program, REX_IMUL_RM...)
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program = append(program, byte(0xc0+8*instr.Dst_Reg))
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default:
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panic("unreachable")
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}
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}
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program = append(program, RET)
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return mapProgram(program, len(program))
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}
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