25 lines
1.1 KiB
ArmAsm
25 lines
1.1 KiB
ArmAsm
/*
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* Unconditional branch, 8-bit offset.
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*
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* The branch distance is a signed code-unit offset, which we need to
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* double to get a byte offset.
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*/
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/* goto +AA */
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.extern MterpProfileBranch
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srl rINST, rINST, 8
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seb rINST, rINST # rINST <- offset (sign-extended AA)
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#if MTERP_PROFILE_BRANCHES
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EXPORT_PC
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move a0, rSELF
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daddu a1, rFP, OFF_FP_SHADOWFRAME
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move a2, rINST
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jal MterpProfileBranch # (self, shadow_frame, offset)
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bnezc v0, MterpOnStackReplacement # Note: offset must be in rINST
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#endif
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dlsa rPC, rINST, rPC, 1 # rPC <- rPC + offset * 2
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lw ra, THREAD_FLAGS_OFFSET(rSELF) # Preload flags for MterpCheckSuspendAndContinue
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move a0, rINST # a0 <- offset
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FETCH_INST # load rINST
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bltz a0, MterpCheckSuspendAndContinue # suspend check if backwards branch
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GET_INST_OPCODE v0 # extract opcode from rINST
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GOTO_OPCODE v0 # jump to next instruction
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