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 /* -*- Mode: asm; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-

  * Version: MPL 1.1

  *

  * This Source Code Form is subject to the terms of the Mozilla Public

  * License, v. 2.0. If a copy of the MPL was not distributed with this

  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

 /* This code is for MIPS using the O32 ABI. */

 #ifdef ANDROID

 #include <asm/regdef.h>

 #include <asm/asm.h>

 #include <machine/asm.h>

 #else

 #include <sys/regdef.h>

 #include <sys/asm.h>

 #endif

 # NARGSAVE is the argument space in the callers frame, including extra

 # 'shadowed' space for the argument registers. The minimum of 4

 # argument slots is sometimes predefined in the header files.

 #ifndef NARGSAVE

 #define NARGSAVE 4

 #endif

 #define LOCALSZ 3	/* gp, fp, ra */

 #define FRAMESZ ((((NARGSAVE+LOCALSZ)*SZREG)+ALSZ)&ALMASK)

 #define RAOFF (FRAMESZ - (1*SZREG))

 #define FPOFF (FRAMESZ - (2*SZREG))

 #define GPOFF (FRAMESZ - (3*SZREG))

 #define A0OFF (FRAMESZ + (0*SZREG))

 #define A1OFF (FRAMESZ + (1*SZREG))

 #define A2OFF (FRAMESZ + (2*SZREG))

 #define A3OFF (FRAMESZ + (3*SZREG))

 	.text

 #	

 # _NS_InvokeByIndex(that, methodIndex, paramCount, params)

 #                      a0       a1          a2         a3

 	.globl	_NS_InvokeByIndex

 	.align	2

 	.type	_NS_InvokeByIndex,@function

 	.ent	_NS_InvokeByIndex,0

 	.frame	fp, FRAMESZ, ra

 _NS_InvokeByIndex:

 	SETUP_GP

 	subu	sp, FRAMESZ

 	# specify the save register mask for gp, fp, ra, a3 - a0

 	.mask 0xD00000F0, RAOFF-FRAMESZ

 	sw	ra, RAOFF(sp)

 	sw	fp, FPOFF(sp)

 	# we can't use .cprestore in a variable stack frame

 	sw	gp, GPOFF(sp)

 	sw	a0, A0OFF(sp)

 	sw	a1, A1OFF(sp)

 	sw	a2, A2OFF(sp)

 	sw	a3, A3OFF(sp)

 	# save bottom of fixed frame

 	move	fp, sp

 	# extern "C" uint32

 	# invoke_count_words(uint32_t paramCount, nsXPTCVariant* s);

 	la	t9, invoke_count_words

 	move	a0, a2

 	move	a1, a3

 	jalr	t9

 	lw  	gp, GPOFF(fp)

 	# allocate variable stack, with a size of:

 	# wordsize (of 4 bytes) * result (already aligned to dword)

 	# but a minimum of 16 byte

 	sll	v0, 2

 	slt	t0, v0, 16

 	beqz	t0, 1f

 	li	v0, 16

 1:	subu	sp, v0

 	# let a0 point to the bottom of the variable stack, allocate

 	# another fixed stack for:

 	# extern "C" void

 	# invoke_copy_to_stack(uint32_t* d, uint32_t paramCount,

 	#		       nsXPTCVariant* s);

 	la	t9, invoke_copy_to_stack

 	move	a0, sp

 	lw	a1, A2OFF(fp)

 	lw	a2, A3OFF(fp)

 	subu	sp, 16

 	jalr	t9

 	lw  	gp, GPOFF(fp)

 	# back to the variable stack frame

 	addu	sp, 16

 	# calculate the function we need to jump to, which must then be

 	# stored in t9

 	lw	a0, A0OFF(fp)	# a0 = set "that" to be "this"

 	lw	t0, A1OFF(fp)	# a1 = methodIndex

 	lw	t9, 0(a0)

 	# t0 = methodIndex << PTRLOG

 	sll	t0, t0, PTRLOG

 	addu	t9, t0

 	lw	t9, (t9)

 	# Set a1-a3 to what invoke_copy_to_stack told us. a0 is already

 	# the "this" pointer. We don't have to care about floating

 	# point arguments, the non-FP "this" pointer as first argument

 	# means they'll never be used.

 	lw	a1, 1*SZREG(sp)

 	lw	a2, 2*SZREG(sp)

 	lw	a3, 3*SZREG(sp)

 	jalr	t9

 	# Micro-optimization: There's no gp usage below this point, so

 	# we don't reload.

 	# lw	gp, GPOFF(fp)

 	# leave variable stack frame

 	move	sp, fp

 	lw	ra, RAOFF(sp)

 	lw	fp, FPOFF(sp)

 	addiu	sp, FRAMESZ

 	j	ra

 END(_NS_InvokeByIndex)