zlib/arm/inffastS.s

38 	#define		hold		r4
117 	//ldrd	r6,hold, state_window	// window/hold, hold use r7
119 	ldr		hold, state_hold		// state->hold
130 	ldr		hold, state_hold		// state->hold
168 	add		hold, hold, r3, asl bits	// deposit the new 2 bytes into hold
173 	and		r3, hold, r1				// r3 = hold & lmask
186 	// this.val + (hold & ((1U << op) - 1));
187 	// r3 = r1 + hold & ((1<<r2)-1);
190 	ror 	r3, hold, r2				// rotate the op least significant bits of hold to MSB
191 	add		r3, r1, r3, lsr r12			// r3 = r1 + (op LSBs in hold) = r1 + hold & ((1<<r2)-1);
204 	mov		hold, hold, lsr ip			// hold >>= this.bits
248 	// hold &= (1U << bits) - 1;
251     ror 	hold, hold, bits			// this is equivalent to hold<<(32-bits)
252     lsr 	hold, hold, ip				// logical shift right by (32-bits), hold now only keeps the bits LSBs
255 	str		hold, state_hold			// state->hold = hold;
266 	addhi	hold, hold, r3, asl bits	// if (op>bits) hold += (unsigned long)(PUP(in)) << bits;
269     ror 	r3, hold, r2				// (hold<<(32-op))
270 	add		r6, r1, r3, lsr ip			// len += (unsigned)hold & ((1U << op) - 1);
274 	mov		hold, hold, lsr r2			// hold >>= op;
281     addls   hold, hold, r3, asl bits    // 	twice hold += (unsigned long)(PUP(in)) << bits;
287 	and		r3, hold, r2				// r3 = hold & dmask
289 	add		r3, r2, distcode			// &dcode[hold&dmask];
294 	mov		hold, hold, lsr r3			// hold >>= this.bits;
310 	ror		r3, hold, ip				// hold<<(32-op)
311 	add		r3, r1, r3, lsr r2			// this.val + (hold & ((1U << op) - 1))
314 	add		r3, r2, distcode			// this = dcode[this.val + (hold & ((1U << op) - 1))];
321 	mov		hold, hold, lsr r3			// hold >> = this.bits
330 	addhi	hold, hold, r3, asl bits	// 		hold += (unsigned long)(PUP(in)) << bits;
334 	addhi	hold, hold, r3, asl bits	//			hold += (unsigned long)(PUP(in)) << bits;
338 	ror		r3, hold, r2				// hold<<(32-op)
339 	add		r3, r1, r3, lsr ip			// dist += (unsigned)hold & ((1U << op) - 1);
349 	mov		hold, hold, lsr r2			// hold >>= op ;
438 //	add		hold, hold, r3, asl bits	// twice hold += (unsigned long)(PUP(in)) << bits;