R8 / ProGuard
=============

If you use OkHttp as a dependency in an Android project which uses R8 as a default compiler you
don't have to do anything. The specific rules are [already bundled][okhttp3_pro] into the JAR which can be
interpreted by R8 automatically.

If you, however, don't use R8 you have to apply the rules from [this file][okhttp3_pro]. You might
also need rules from [Okio][okio] which is a dependency of this library.

                        }
                        filter {
                            includeModule("com.android.tools", "r8") // force resolving r8 from wrong repo
                        }
                    }
                    maven {
                        url = "${mavenRepo.uri}"
                        metadataSources {
                            artifact()
                        }

zero64setup:
	DCBTST (R3)             // prepare data cache
	MOVD   R7, CTR          // number of 64 byte chunks
	MOVD   $16, R8
	MOVD   $32, R16
	MOVD   $48, R17

zero64:
	STXVD2X VS32, (R3+R0)   // store 16 bytes
	STXVD2X VS32, (R3+R8)
	STXVD2X VS32, (R3+R16)
	STXVD2X VS32, (R3+R17)
	ADD     $64, R3
	ADD     $-64, R4
	BDNZ    zero64          // dec ctr, br zero64 if ctr not 0

	// but uninitialized "shadow space" for the first 4 args.
	// The values are in registers.
	MOVQ	CX, (16+0)(SP)
	MOVQ	DX, (16+8)(SP)
	MOVQ	R8, (16+16)(SP)
	MOVQ	R9, (16+24)(SP)
	// R8 = address of args vector
	LEAQ	(16+0)(SP), R8

	// remove return address from stack, we are not returning to callbackasm, but to its caller.
	MOVQ	0(SP), AX
	ADDQ	$8, SP

	VBROADCASTI32X8 -7(DI)(R8*8), K3, Z5               // 62b27d4b5bacc7f9ffffff
	VBROADCASTI32X8 (R14), K3, Z1                      // 62d27d4b5b0e
	VBROADCASTI32X8 -7(DI)(R8*8), K3, Z1               // 62b27d4b5b8cc7f9ffffff
	VBROADCASTI64X2 15(R8), K4, Y5                     // 62d2fd2c5aa80f000000
	VBROADCASTI64X2 (BP), K4, Y5                       // 62f2fd2c5a6d00
	VBROADCASTI64X2 15(R8), K4, Y24                    // 6242fd2c5a800f000000

	assertequal(r5, 5, "5")
	r6 := f6(1)
	assertequal(r6, 6, "6")
	var r7 int
	var s7 float64
	r7, s7 = f7(1)
	assertequal(r7, 7, "r7")
	assertequal(int(s7), 7, "s7")
	var r8 int
	var s8 float64
	r8, s8 = f8(1)
	assertequal(r8, 8, "r8")
	assertequal(int(s8), 8, "s8")
	var r9 int
	var s9 float64
	r9, s9 = f9(1)
	assertequal(r9, 9, "r9")
	assertequal(int(s9), 9, "s9")
	var t *T = new(T)
	t.x = 1
	t.y = 2

// a4  | SI          | R10
// a5  | R8          | R8
// a6  | R9          | R9
//
// r1  | AX          | AX
// r2  | BX          | DX
// err | CX          | part of AX
//
// Note that this differs from "standard" ABI convention, which would pass 4th
// arg in CX, not R10.
TEXT ·Syscall6<ABIInternal>(SB),NOSPLIT,$0
	// a6 already in R9.
	// a5 already in R8.
	MOVQ	SI, R10 // a4
	MOVQ	DI, DX  // a3

	MOVL	d,		R9; \
	XORL	c,		R9; \
	XORL	b,		R9; \
	ADDL	$const,	a; \
	ADDL	R8,		a; \
	MOVL	(index*4)(SI),R8; \
	ADDL	R9,		a; \
	ROLL	$shift,		a; \
	ADDL	b,		a

#define ROUND3(a, b, c, d, index, const, shift) \
	XORL	a,		R9; \
	XORL	b,		R9; \
	ADDL	$const,	a; \
	ADDL	R8,		a; \
	MOVL	(index*4)(SI),R8; \
	ADDL	R9,		a; \
	ROLL	$shift,		a; \
	ADDL	b,		a

	JMP		addMulVVWx(SB)

TEXT addMulVVWx(SB), NOFRAME|NOSPLIT, $0
	MOVD z+0(FP), R2
	MOVD x+8(FP), R8
	MOVD y+16(FP), R9

	MOVD $0, R1 // i*8 = 0
	MOVD $0, R7 // i = 0
	MOVD $0, R0 // make sure it's zero
	MOVD $0, R4 // c = 0

	MOVD   R5, R12
	AND    $-2, R12
	CMPBGE R5, $2, A6
	BR     E6

A6:
	MOVD   (R8)(R1*1), R6
	MULHDU R9, R6
	MOVD   (R2)(R1*1), R10
	ADDC   R10, R11        // add to low order bits

	// R7 = byte to find
	AND	$0xff, R7
	MOVV	R4, R6		// store base for later
	ADDV	R4, R5		// end
	ADDV	$-1, R4

	PCALIGN	$16
loop:
	ADDV	$1, R4
	BEQ	R4, R5, notfound
	MOVBU	(R4), R8
	BNE	R7, R8, loop

	SUBV	R6, R4		// remove base
	RET

notfound:
	MOVV	$-1, R4
	RET

TEXT ·IndexByteString<ABIInternal>(SB),NOSPLIT,$0-32
	// R4 = s_base
	// R5 = s_len
	// R6 = byte to find