// The subtract-immediate fold, the TEQ/TNE trap pseudos, PRELDX, the FP
// condition branches and the N(PC) branch spellings, against the toolchain.
#include "textflag.h"

// func SubFold(x int64) int64
TEXT ·SubFold(SB), NOSPLIT, $0-16
	MOVV  x+0(FP), R8
	SUBV  $0, R8
	SUBV  $4, R9, R10
	SUBV  $4096, R11
	SUBV  $-4, R12
	SUB   $1, R13
	SUBVU $4, R14
	SUBV  $1048576, R15
	MOVV  R8, ret+8(FP)
	RET

// func Traps(x int64) int64
TEXT ·Traps(SB), NOSPLIT, $0-16
	MOVV x+0(FP), R4
	TEQ  $4, R4, R5
	TEQ  $4, R4
	TNE  $6, R5, R6
	MOVV R4, ret+8(FP)
	RET

// func Prefetch(x int64) int64
TEXT ·Prefetch(SB), NOSPLIT, $0-16
	MOVV   x+0(FP), R7
	PRELDX 0(R7), $0x80001021, $0
	PRELDX -1(R7), $0x1021, $2
	MOVV   R7, ret+8(FP)
	RET

// func BranchForms(x int64) int64
TEXT ·BranchForms(SB), NOSPLIT, $0-16
	MOVV x+0(FP), R4

l1:
	BFPT l1
	BFPT FCC3, l1
	BFPF l1
	JMP  -4(PC)
	JAL  1(PC)
	JAL  (R4)

loop:
	ADDV $1, R4
	BEQ  R4, R5, loop
	BNE  R4, l1
	RET