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/* libs/opengles/iterators.S
**
** Copyright 2006, The Android Open Source Project
**
** Licensed under the Apache License, Version 2.0 (the "License");
** you may not use this file except in compliance with the License.
** You may obtain a copy of the License at
**
** http://www.apache.org/licenses/LICENSE-2.0
**
** Unless required by applicable law or agreed to in writing, software
** distributed under the License is distributed on an "AS IS" BASIS,
** WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
** See the License for the specific language governing permissions and
** limitations under the License.
*/
.text
.align
.arm
.global iterators0032
.type iterators0032, %function
/*
* iterators0032
*
* MUST BE CALLED FROM ARM CODE
*
* r0: const compute_iterators_t* (this)
* r0 + 0: m_dx01
* r0 + 4: m_dy10
* r0 + 8: m_dx20
* r0 +12: m_dy02
* r0 +16: m_x0
* r0 +20: m_y0
* r0 +24: m_area
* r0 +28: m_scale
* r0 +29: m_area_scale;
* r1: int32_t* (out)
* r1 + 0: c
* r1 + 4: dcdx
* r1 + 8: dcdy
* r2: c0
* r3: c1
* [sp]: c2
*/
iterators0032:
stmfd sp!, {r4, r5, r6, r7, r8, lr}
ldr r4, [sp, #4*6]
ldrb r12, [r0, #29]
sub r3, r3, r2
sub r4, r4, r2
sub r12, r12, #16
mov r3, r3, asr r12
mov r4, r4, asr r12
ldr r5, [r0, #0]
ldr r12, [r0, #4]
smull r8, lr, r4, r5
ldr r5, [r0, #8]
smull r6, r7, r4, r12
ldr r12, [r0, #12]
smlal r8, lr, r3, r5
smlal r6, r7, r3, r12
ldr r3, [r0, #16] // m_x0
ldr r4, [r0, #20] // m_x1
str r6, [r1, #4]
str r8, [r1, #8]
umull r6, r5, r3, r6
umull r8, r0, r4, r8
mla r7, r3, r7, r5
mla lr, r4, lr, r0
adds r6, r6, r8
adc r7, r7, lr
movs r6, r6, lsr #4
adc r6, r6, r7, lsl #28
rsb r6, r6, r2, lsl #16
str r6, [r1, #0]
ldmfd sp!, {r4, r5, r6, r7, r8, pc}
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