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/*
AngelCode Scripting Library
Copyright (c) 2003-2015 Andreas Jonsson
This software is provided 'as-is', without any express or implied
warranty. In no event will the authors be held liable for any
damages arising from the use of this software.
Permission is granted to anyone to use this software for any
purpose, including commercial applications, and to alter it and
redistribute it freely, subject to the following restrictions:
1. The origin of this software must not be misrepresented; you
must not claim that you wrote the original software. If you use
this software in a product, an acknowledgment in the product
documentation would be appreciated but is not required.
2. Altered source versions must be plainly marked as such, and
must not be misrepresented as being the original software.
3. This notice may not be removed or altered from any source
distribution.
The original version of this library can be located at:
http://www.angelcode.com/angelscript/
Andreas Jonsson
andreas@angelcode.com
*/
// Assembly routines for the ARM call convention
// Written by Fredrik Ehnbom in June 2009
// Adapted to GNUC by darktemplar216 in September 2009
// Small fixed to work under XCode GCC by Gilad Novik in October 2009
#if !defined(AS_MAX_PORTABILITY)
#if defined(__arm__) || defined(__ARM__)
.align 2
.globl _armFunc
.globl _armFuncR0
.globl _armFuncR0R1
.globl _armFuncObjLast
.globl _armFuncR0ObjLast
_armFunc:
stmdb sp!, {r4-r8, lr}
mov r6, r0 // arg table
movs r7, r1 // arg size (also set the condition code flags so that we detect if there are no arguments)
mov r4, r2 // function address
mov r8, #0
beq nomoreargs
// Load the first 4 arguments into r0-r3
cmp r7, #4
ldrge r0, [r6],#4
cmp r7, #2*4
ldrge r1, [r6],#4
cmp r7, #3*4
ldrge r2, [r6],#4
cmp r7, #4*4
ldrge r3, [r6],#4
ble nomoreargs
// Load the rest of the arguments onto the stack
sub r7, r7, #4*4 // skip the 4 registers already loaded into r0-r3
sub sp, sp, r7
mov r8, r7
stackargsloop:
ldr r5, [r6], #4
str r5, [sp], #4
subs r7, r7, #4
bne stackargsloop
nomoreargs:
sub sp, sp, r8
blx r4
add sp, sp, r8
ldmia sp!, {r4-r8, pc}
_armFuncObjLast:
stmdb sp!, {r4-r8, lr}
mov r6, r0 // arg table
movs r7, r1 // arg size (also set the condition code flags so that we detect if there are no arguments)
mov r4, r2 // function address
mov r8, #0
mov r0, r3 // objlast. might get overwritten
str r3, [sp, #-4]! // objlast again.
beq nomoreargsarmFuncObjLast
// Load the first 4 arguments into r0-r3
cmp r7, #4
ldrge r0, [r6],#4
cmp r7, #2*4
ldrge r1, [r6],#4
ldrlt r1, [sp]
cmp r7, #3*4
ldrge r2, [r6],#4
ldrlt r2, [sp]
cmp r7, #4*4
ldrge r3, [r6],#4
ldrlt r3, [sp]
ble nomoreargsarmFuncObjLast
// Load the rest of the arguments onto the stack
sub r7, r7, #4*4 // skip the 4 registers already loaded into r0-r3
sub sp, sp, r7
mov r8, r7
stackargslooparmFuncObjLast:
ldr r5, [r6], #4
str r5, [sp], #4
subs r7, r7, #4
bne stackargslooparmFuncObjLast
nomoreargsarmFuncObjLast:
sub sp, sp, r8
blx r4
add sp, sp, r8
add sp, sp, #4
ldmia sp!, {r4-r8, pc}
_armFuncR0ObjLast:
stmdb sp!, {r4-r8, lr}
ldr r7, [sp,#6*4]
str r7, [sp,#-4]!
mov r6, r0 // arg table
movs r7, r1 // arg size (also set the condition code flags so that we detect if there are no arguments)
mov r4, r2 // function address
mov r8, #0
mov r0, r3 // r0 explicitly set
ldr r1, [sp] // objlast. might get overwritten
beq nomoreargsarmFuncR0ObjLast
// Load the first 3 arguments into r1-r3
cmp r7, #1*4
ldrge r1, [r6],#4
cmp r7, #2*4
ldrge r2, [r6],#4
ldrlt r2, [sp]
cmp r7, #3*4
ldrge r3, [r6],#4
ldrlt r3, [sp]
ble nomoreargsarmFuncR0ObjLast
// Load the rest of the arguments onto the stack
sub r7, r7, #3*4 // skip the 3 registers already loaded into r1-r3
sub sp, sp, r7
mov r8, r7
stackargslooparmFuncR0ObjLast:
ldr r5, [r6], #4
str r5, [sp], #4
subs r7, r7, #4
bne stackargslooparmFuncR0ObjLast
nomoreargsarmFuncR0ObjLast:
sub sp, sp, r8
blx r4
add sp, sp, r8
add sp, sp, #4
ldmia sp!, {r4-r8, pc}
_armFuncR0:
stmdb sp!, {r4-r8, lr}
mov r6, r0 // arg table
movs r7, r1 // arg size (also set the condition code flags so that we detect if there are no arguments)
mov r4, r2 // function address
mov r8, #0
mov r0, r3 // r0 explicitly set
beq nomoreargsarmFuncR0
// Load the first 3 arguments into r1-r3
cmp r7, #1*4
ldrge r1, [r6],#4
cmp r7, #2*4
ldrge r2, [r6],#4
cmp r7, #3*4
ldrge r3, [r6],#4
ble nomoreargsarmFuncR0
// Load the rest of the arguments onto the stack
sub r7, r7, #3*4 // skip the 3 registers already loaded into r1-r3
sub sp, sp, r7
mov r8, r7
stackargslooparmFuncR0:
ldr r5, [r6], #4
str r5, [sp], #4
subs r7, r7, #4
bne stackargslooparmFuncR0
nomoreargsarmFuncR0:
sub sp, sp, r8
blx r4
add sp, sp, r8
ldmia sp!, {r4-r8, pc}
_armFuncR0R1:
stmdb sp!, {r4-r8, lr}
mov r6, r0 // arg table
movs r7, r1 // arg size (also set the condition code flags so that we detect if there are no arguments)
mov r4, r2 // function address
mov r8, #0
mov r0, r3 // r0 explicitly set
ldr r1, [sp, #6*4] // r1 explicitly set too
beq nomoreargsarmFuncR0R1
// Load the first 2 arguments into r2-r3
cmp r7, #1*4
ldrge r2, [r6],#4
cmp r7, #2*4
ldrge r3, [r6],#4
ble nomoreargsarmFuncR0R1
// Load the rest of the arguments onto the stack
sub r7, r7, #2*4 // skip the 2 registers already loaded into r2-r3
sub sp, sp, r7
mov r8, r7
stackargslooparmFuncR0R1:
ldr r5, [r6], #4
str r5, [sp], #4
subs r7, r7, #4
bne stackargslooparmFuncR0R1
nomoreargsarmFuncR0R1:
sub sp, sp, r8
blx r4
add sp, sp, r8
ldmia sp!, {r4-r8, pc}
#endif
#endif /* !AS_MAX_PORTABILITY */
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