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