52 lines
954 B
ArmAsm
52 lines
954 B
ArmAsm
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// The subtract-immediate fold, the TEQ/TNE trap pseudos, PRELDX, the FP
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// condition branches and the N(PC) branch spellings, against the toolchain.
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#include "textflag.h"
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// func SubFold(x int64) int64
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TEXT ·SubFold(SB), NOSPLIT, $0-16
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MOVV x+0(FP), R8
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SUBV $0, R8
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SUBV $4, R9, R10
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SUBV $4096, R11
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SUBV $-4, R12
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SUB $1, R13
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SUBVU $4, R14
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SUBV $1048576, R15
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MOVV R8, ret+8(FP)
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RET
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// func Traps(x int64) int64
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TEXT ·Traps(SB), NOSPLIT, $0-16
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MOVV x+0(FP), R4
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TEQ $4, R4, R5
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TEQ $4, R4
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TNE $6, R5, R6
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MOVV R4, ret+8(FP)
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RET
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// func Prefetch(x int64) int64
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TEXT ·Prefetch(SB), NOSPLIT, $0-16
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MOVV x+0(FP), R7
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PRELDX 0(R7), $0x80001021, $0
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PRELDX -1(R7), $0x1021, $2
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MOVV R7, ret+8(FP)
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RET
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// func BranchForms(x int64) int64
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TEXT ·BranchForms(SB), NOSPLIT, $0-16
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MOVV x+0(FP), R4
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l1:
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BFPT l1
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BFPT FCC3, l1
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BFPF l1
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JMP -4(PC)
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JAL 1(PC)
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JAL (R4)
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loop:
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ADDV $1, R4
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BEQ R4, R5, loop
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BNE R4, l1
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RET
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