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/****************************************************************************
**
** Copyright (C) 2013 Imagination Technologies Limited, www.imgtec.com
** Contact: https://www.qt.io/licensing/
**
** This file is part of the QtCore module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:COMM$
**
** Commercial License Usage
** Licensees holding valid commercial Qt licenses may use this file in
** accordance with the commercial license agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and The Qt Company. For licensing terms
** and conditions see https://www.qt.io/terms-conditions. For further
** information use the contact form at https://www.qt.io/contact-us.
**
** $QT_END_LICENSE$
**
**
**
**
**
**
**
**
**
**
**
**
**
**
**
**
**
**
**
****************************************************************************/
#include "../../gui/painting/qt_mips_asm_dsp_p.h"
.macro EXTRACT_HALVES_x2 src1, src2, hi_1, hi_2
#if defined(__MIPSEL) && __MIPSEL
srl \hi_1, \src1, 16
ext \src1, \src1, 0, 16
srl \hi_2, \src2, 16
ext \src2, \src2, 0, 16
#else
ext \hi_1, \src1, 0, 16
srl \src1, \src1, 16
ext \hi_2, \src2, 0, 16
srl \src2, \src2, 16
#endif
.endm
LEAF_MIPS_DSP(qt_ucstrncmp_mips_dsp_asm)
/*
* Arguments:
* a0 - string_a (uint16_t*)
* a1 - string_b (uint16_t*)
* a2 - length (uint32_t)
*
* Register usage:
* t0 - batches
*/
move v0, zero /* result = 0 */
andi t0, a0, 0x3 /* t1 = string_a % 4 */
andi t1, a1, 0x3 /* t0 = string_b % 4 */
or t2, t0, t1 /* t2 = t0 | t1 */
beqz t2, 5f /* both aligned */
and t2, t0 ,t1
beqz t2, 6f /* one aligned */
nop
/*
* Both strings are unaligned: read 1 halfword from each,
* then fall-off to continue with the both-aligned case.
*/
lhu t0, 0 (a0)
lhu t1, 0 (a1)
addiu a2, a2, -1 /* len-- */
sub v0, t0, t1 /* v0 = t0-t1 */
addiu a0, a0, 2 /* string_a++ */
bnez v0, 0f /* if (t0-t1): return */
addiu a1, a1, 2 /* string_b++ */
beqz a2, 0f /* if !len: return */
/* next instruction (srl) fills delay branch slot */
5: /* Both string pointers are aligned */
srl t0, a2, 3 /* batches = length / 8 */
beqz t0, 9f /* if !batches: tail */
andi a2, a2, 0x7 /* length = length % 8 */
SAVE_REGS_ON_STACK 0, s0, s1, s2, s3
1: lw t1, 0 (a0) /* [a0 a1] */
lw t3, 4 (a0) /* [a2 a3] */
lw t5, 8 (a0) /* [a4 a5] */
lw t7, 12 (a0) /* [a6 a7] */
lw t2, 0 (a1) /* [b0 b1] */
lw t4, 4 (a1) /* [b2 b3] */
lw t6, 8 (a1) /* [b4 b5] */
lw t8, 12 (a1) /* [b6 b7] */
/*
* Subtract elements one by one, if the result is zero
* both halves of the registers (shorts) are equal.
*/
subq.ph s0, t1, t2 /* [a0-b0 a1-b1] */
subq.ph s1, t3, t4 /* [a2-b2 a3-b3] */
bnez s0, 1f
subq.ph s2, t5, t6 /* [a4-b4 a5-b5] */
bnez s1, 2f
subq.ph s3, t7, t8 /* [a6-b6 a7-b7] */
bnez s2, 3f
addiu t0, t0, -1 /* batches-- */
bnez s3, 4f
addiu a0, a0, 8*2 /* string_a += 8 */
bnez t0, 1b /* if batches: loop */
addiu a1, a1, 8*2 /* string_b += 8 */
RESTORE_REGS_FROM_STACK 0, s0, s1, s2, s3
bnez a2, 9f /* if length: tail */
nop
jr ra
nop
1: /* Check t1 [a0 a1] vs. t2 [b0 b1] */
EXTRACT_HALVES_x2 t1, t2, t3, t4 /* a0, b0, a1, b1 */
sub v0, t1, t2
RESTORE_REGS_FROM_STACK 0, s0, s1, s2, s3
bnez v0, 0f /* if (a0-b0): return */
nop
jr ra
sub v0, t3, t4 /* return a1-b1 */
2: /* Check t3 [a2 a3] vs. t4 [b2 b3] */
EXTRACT_HALVES_x2 t3, t4, t1, t2 /* a2, b2, a3, b3 */
sub v0, t3, t4
RESTORE_REGS_FROM_STACK 0, s0, s1, s2, s3
bnez v0, 0f /* if (a2-b2): return */
nop
jr ra
sub v0, t1, t2 /* return a3-b3 */
3: /* Check t5 [a4 a5] vs. t6 [b4 b5] */
EXTRACT_HALVES_x2 t5, t6, t1, t2 /* a4, b4, a5, b5 */
sub v0, t5, t6
RESTORE_REGS_FROM_STACK 0, s0, s1, s2, s3
bnez v0, 0f /* if (a4-b4): return */
nop
jr ra
sub v0, t1, t2 /* return a5-b5 */
4: /* Check t7 [a6 a7] vs. t8 [b6 b7] */
EXTRACT_HALVES_x2 t7, t8, t1, t2 /* a6, b6, a7, b7 */
sub v0, t7, t8
RESTORE_REGS_FROM_STACK 0, s0, s1, s2, s3
bnez v0, 0f /* if (a6-b6): return */
nop
jr ra
sub v0, t1, t2
/* Process remaining tail items. */
9: lhu t1, 0 (a0) /* a */
lhu t2, 0 (a1) /* b */
addiu a2, a2, -1 /* length-- */
sub v0, t1, t2 /* result = (a - b) */
bnez v0, 0f /* if (a - b): return */
addiu a0, a0, 2 /* string_a++ */
bnez a2, 9b /* if length: loop */
addiu a1, a1, 2 /* string_b++ */
0: jr ra
nop
/* One of the inputs is unaligned, do unrolled half-word loads */
6: srl t0, a2, 3 /* batches = length / 8 */
andi a2, a2, 0x7 /* length = length % 8 */
1: lhu t1, 0 (a0)
lhu t2, 0 (a1)
lhu t3, 2 (a0)
lhu t4, 2 (a1)
lhu t5, 4 (a0)
lhu t6, 4 (a1)
lhu t7, 6 (a0)
lhu t8, 6 (a1)
sub v0, t1, t2
sub t1, t3, t4
bnez v0, 0f
sub t2, t5, t6
bnez t1, 2f
sub t3, t7, t8
bnez t2, 3f
lhu t1, 8 (a0)
bnez t3, 4f
lhu t2, 8 (a1)
lhu t3, 10 (a0)
lhu t4, 10 (a1)
lhu t5, 12 (a0)
lhu t6, 12 (a1)
lhu t7, 14 (a0)
lhu t8, 14 (a1)
sub v0, t1, t2
sub t1, t3, t4
bnez v0, 0f
sub t2, t5, t6
bnez t1, 2f
sub t3, t7, t8
bnez t2, 3f
addiu t0, t0, -1 /* batches-- */
bnez t3, 4f
addiu a0, a0, 8*2 /* string_a += 8 */
bnez t0, 1b
addiu a1, a1, 8*2 /* string_b += 8 */
bnez a2, 9b /* if length: tail */
nop
0: jr ra
nop
2: jr ra
move v0, t1
3: jr ra
move v0, t2
4: jr ra
move v0, t3
END(qt_ucstrncmp_mips_dsp_asm)
#if defined(__mips_dspr2)
LEAF_MIPS_DSPR2(qt_fromlatin1_mips_asm_unroll8)
#else
LEAF_MIPS_DSP(qt_fromlatin1_mips_asm_unroll8)
#endif
andi t0, a1, 0x3
beqz t0, 9f /* check that src is aligned */
nop
1: lbu t1, 0 (a1)
addiu a1, a1, 1
addiu a2, a2, -1
sh t1, 0 (a0)
beqz a2, 0f
andi t0, a1, 0x3
bnez t0, 1b
addiu a0, a0, 2
9: /* source pointer is aligned: do batches of 8 elements */
andi t0, a0, 3 /* check if dst is aligned */
bnez t0, 6f
srl t0, a2, 3 /* batches = len / 8 */
andi a2, a2, 0x7 /* tail = len % 8 */
beqz t0, 8f /* if !batches: tail */
nop
1: lw t1, 0 (a1)
lw t2, 4 (a1)
addiu a1, a1, 8*1
addiu t0, t0, -1
preceu.ph.qbl t3, t1
preceu.ph.qbr t1, t1
preceu.ph.qbl t4, t2
preceu.ph.qbr t2, t2
#if defined(__MIPSEL) && __MIPSEL
sw t1, 0 (a0)
sw t3, 4 (a0)
sw t2, 8 (a0)
sw t4, 12 (a0)
#else
sw t3, 0 (a0)
sw t1, 4 (a0)
sw t4, 8 (a0)
sw t2, 12 (a0)
#endif
bnez t0, 1b
addiu a0, a0, 8*2
8: /* process tail items */
beqz a2, 0f
nop
1: lbu t1, 0 (a1)
addiu a2, a2, -1
sh t1, 0 (a0)
addiu a1, a1, 1
bnez a2, 1b
addiu a0, a0, 2
0: jr ra
nop
6: beqz t0, 8b
andi a2, a2, 7
7: lw t1, 0(a1)
lw t2, 4(a1)
addiu t0, t0, -1
addiu a1, a1, 8
andi t3, t1, 0xff
#if defined(__mips_dspr2)
prepend t1, t2, 8
#else
sll t4, t4, 24
srl t1, t1, 8
or t1, t1, t4
#endif
srl t2, t2, 8
preceu.ph.qbr t4, t1
preceu.ph.qbl t1, t1
preceu.ph.qbr t5, t2
srl t2, t2, 16
sh t3, 0(a0)
sw t4, 2(a0)
sw t1, 6(a0)
sw t5, 10(a0)
sh t2, 14(a0)
bnez t0, 7b
addiu a0, a0, 16
bnez a2, 1b
nop
jr ra
nop
END(qt_fromlatin1_mips_asm_unroll8)
LEAF_MIPS_DSP(qt_fromlatin1_mips_asm_unroll4)
/*
* Arguments:
* a0 - dst (uint16_t*)
* a1 - src (const char*)
* a2 - len (unsigned int)
*/
/*
* QString::fromLatin1_helper() already handles the len==0
* case: assume that len is never zero.
*/
srl t0, a2, 2
beqz t0, 9f
andi a2, a2, 0x3
1: lbu t1, 0(a1)
lbu t2, 1(a1)
lbu t3, 2(a1)
lbu t4, 3(a1)
sh t1, 0(a0)
sh t2, 2(a0)
sh t3, 4(a0)
sh t4, 6(a0)
addiu t0, t0, -1
addiu a1, a1, 4
bnez t0, 1b
addiu a0, a0, 8
8: beqz a2, 0f
nop
9: lbu t1, 0(a1)
addiu a2, a2, -1
addiu a1, a1, 1
sh t1, 0(a0)
bnez a2, 9b
addiu a0, a0, 2
0: jr ra
nop
END(qt_fromlatin1_mips_asm_unroll4)
LEAF_MIPS_DSP(qt_toLatin1_mips_dsp_asm)
/*
* a0 - dst
* a1 - src
* a2 - length
*/
addiu t9, zero, 0x3f
srl t8, a2, 2
beqz t8, 2f
andi a2, a2, 3
1:
lhu t0, 0(a1)
lhu t1, 2(a1)
lhu t2, 4(a1)
lhu t3, 6(a1)
srl t4, t0, 8
srl t5, t1, 8
srl t6, t2, 8
srl t7, t3, 8
movn t0, t9, t4
movn t1, t9, t5
movn t2, t9, t6
movn t3, t9, t7
addiu a1, a1, 8
addiu t8, t8, -1
sb t0, 0(a0)
sb t1, 1(a0)
sb t2, 2(a0)
sb t3, 3(a0)
bgtz t8, 1b
addiu a0, a0, 4
2: beqz a2, 4f
nop
3:
lhu t0, 0(a1)
addiu a1, a1, 2
addiu a2, a2, -1
srl t1, t0, 8
movn t0, t9, t1
sb t0, 0(a0)
bgtz a2, 3b
addiu a0, a0, 1
4:
jr ra
nop
END(qt_toLatin1_mips_dsp_asm)
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