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https://github.com/emmansun/gmsm.git
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68 lines
1.2 KiB
ArmAsm
68 lines
1.2 KiB
ArmAsm
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//go:build amd64 && gc && !purego
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// +build amd64,gc,!purego
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// func montgomeryLoop(d []uint, a []uint, b []uint, m []uint, m0inv uint) uint
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TEXT ·montgomeryLoop(SB), $8-112
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MOVQ d_len+8(FP), CX
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MOVQ d_base+0(FP), BX
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MOVQ b_base+48(FP), SI
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MOVQ m_base+72(FP), DI
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MOVQ m0inv+96(FP), R8
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XORQ R9, R9
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XORQ R10, R10
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outerLoop:
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MOVQ a_base+24(FP), R11
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MOVQ (R11)(R10*8), R11
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MOVQ (SI), AX
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MULQ R11
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MOVQ AX, R13
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MOVQ DX, R12
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ADDQ (BX), R13
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ADCQ $0x00, R12
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MOVQ R8, R14
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IMULQ R13, R14
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BTRQ $0x3f, R14
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MOVQ (DI), AX
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MULQ R14
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ADDQ AX, R13
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ADCQ DX, R12
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SHRQ $0x3f, R12, R13
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XORQ R12, R12
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INCQ R12
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JMP innerLoopCondition
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innerLoop:
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MOVQ (SI)(R12*8), AX
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MULQ R11
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MOVQ AX, BP
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MOVQ DX, R15
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MOVQ (DI)(R12*8), AX
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MULQ R14
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ADDQ AX, BP
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ADCQ DX, R15
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ADDQ (BX)(R12*8), BP
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ADCQ $0x00, R15
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ADDQ R13, BP
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ADCQ $0x00, R15
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MOVQ BP, AX
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BTRQ $0x3f, AX
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MOVQ AX, -8(BX)(R12*8)
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SHRQ $0x3f, R15, BP
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MOVQ BP, R13
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INCQ R12
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innerLoopCondition:
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CMPQ CX, R12
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JGT innerLoop
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ADDQ R13, R9
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MOVQ R9, AX
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BTRQ $0x3f, AX
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MOVQ AX, -8(BX)(CX*8)
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SHRQ $0x3f, R9
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INCQ R10
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CMPQ CX, R10
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JGT outerLoop
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MOVQ R9, ret+104(FP)
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RET
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