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.globl FFT_4OIQ14
FFT_4OIQ14:
stmdb sp!, {r4 - r11, lr}
ldr lr, =s_Q14S_8
ldr lr, [lr]
cmp r2, lr
movgt r0, #1
ldmgtia sp!, {r4 - r11, pc}
stmdb sp!, {r1, r2}
mov r3, #0
mov r2, r2
LBL1:
add r12, r0, r3, lsl #2
add r12, r12, r2, lsr #1
ldrsh r5, [r12, #2]
ldrsh r4, [r12], +r2
ldrsh r9, [r12, #2]
ldrsh r8, [r12], +r2
ldrsh r7, [r12, #2]
ldrsh r6, [r12], +r2
ldrsh r11, [r12, #2]
ldrsh r10, [r12], +r2
add r4, r4, r6
add r5, r5, r7
sub r6, r4, r6, lsl #1
sub r7, r5, r7, lsl #1
sub r12, r8, r10
sub lr, r9, r11
add r10, r8, r10
add r11, r9, r11
sub r9, r4, r10
sub r8, r5, r11
add r4, r4, r10
add r5, r5, r11
add r10, r6, lr
sub r11, r7, r12
sub r6, r6, lr
add r7, r7, r12
ldr lr, =t_Q14R_rad8
ldrsh lr, [lr]
stmdb sp!, {r2}
sub r12, r6, r7
mul r6, r12, lr
add r12, r12, r7, lsl #1
mul r7, r12, lr
sub r12, r10, r11
mul r11, r12, lr
sub r12, r12, r10, lsl #1
mul r10, r12, lr
ldmia sp!, {r2}
stmdb sp!, {r4 - r11}
add r4, r0, r3, lsl #2
ldrsh r7, [r4, #2]
ldrsh r6, [r4], +r2
ldrsh r11, [r4, #2]
ldrsh r10, [r4], +r2
ldrsh r9, [r4, #2]
ldrsh r8, [r4], +r2
ldrsh lr, [r4, #2]
ldrsh r12, [r4], +r2
add r6, r6, r8
add r7, r7, r9
sub r8, r6, r8, lsl #1
sub r9, r7, r9, lsl #1
sub r4, r10, r12
sub r5, r11, lr
add r10, r10, r12
add r11, r11, lr
add r6, r6, r10
add r7, r7, r11
sub r10, r6, r10, lsl #1
sub r11, r7, r11, lsl #1
add r12, r8, r5
sub lr, r9, r4
sub r8, r8, r5
add r9, r9, r4
ldmia sp!, {r4, r5}
add r6, r6, r4
add r7, r7, r5
sub r4, r6, r4, lsl #1
sub r5, r7, r5, lsl #1
strh r7, [r1, #2]
strh r6, [r1], #4
ldmia sp!, {r6, r7}
add r8, r8, r6, asr #14
add r9, r9, r7, asr #14
sub r6, r8, r6, asr #13
sub r7, r9, r7, asr #13
strh r9, [r1, #2]
strh r8, [r1], #4
ldmia sp!, {r8, r9}
sub r10, r10, r8
add r11, r11, r9
add r8, r10, r8, lsl #1
sub r9, r11, r9, lsl #1
strh r11, [r1, #2]
strh r10, [r1], #4
ldmia sp!, {r10, r11}
add r12, r12, r10, asr #14
add lr, lr, r11, asr #14
sub r10, r12, r10, asr #13
sub r11, lr, r11, asr #13
strh lr, [r1, #2]
strh r12, [r1], #4
strh r5, [r1, #2]
strh r4, [r1], #4
strh r7, [r1, #2]
strh r6, [r1], #4
strh r9, [r1, #2]
strh r8, [r1], #4
strh r11, [r1, #2]
strh r10, [r1], #4
eor r3, r3, r2, lsr #4
tst r3, r2, lsr #4
bne LBL1
eor r3, r3, r2, lsr #5
tst r3, r2, lsr #5
bne LBL1
mov r12, r2, lsr #6
LBL2:
eor r3, r3, r12
tst r3, r12
bne LBL1
movs r12, r12, lsr #1
bne LBL2
ldmia sp!, {r1, r2}
mov r3, r2, lsr #3
mov r2, #0x20
ldr r0, =t_Q14S_8
cmp r3, #1
beq LBL3
LBL6:
mov r3, r3, lsr #2
stmdb sp!, {r1, r3}
add r12, r2, r2, lsl #1
add r1, r1, r12
sub r3, r3, #1, 16
LBL5:
add r3, r3, r2, lsl #14
LBL4:
ldrsh r6, [r0], #2
ldrsh r7, [r0], #2
ldrsh r8, [r0], #2
ldrsh r9, [r0], #2
ldrsh r10, [r0], #2
ldrsh r11, [r0], #2
ldrsh r5, [r1, #2]
ldrsh r4, [r1], -r2
sub lr, r4, r5
mul r12, lr, r11
add r11, r10, r11, lsl #1
mla r10, r4, r10, r12
mla r11, r5, r11, r12
ldrsh r5, [r1, #2]
ldrsh r4, [r1], -r2
sub lr, r4, r5
mul r12, lr, r9
add r9, r8, r9, lsl #1
mla r8, r4, r8, r12
mla r9, r5, r9, r12
ldrsh r5, [r1, #2]
ldrsh r4, [r1], -r2
sub lr, r4, r5
mul r12, lr, r7
add r7, r6, r7, lsl #1
mla r6, r4, r6, r12
mla r7, r5, r7, r12
ldrsh r5, [r1, #2]
ldrsh r4, [r1]
add r12, r4, r6, asr #14
add lr, r5, r7, asr #14
sub r4, r4, r6, asr #14
sub r5, r5, r7, asr #14
add r6, r8, r10
add r7, r9, r11
sub r8, r8, r10
sub r9, r9, r11
add r10, r12, r6, asr #14
add r11, lr, r7, asr #14
strh r11, [r1, #2]
strh r10, [r1], +r2
sub r10, r4, r9, asr #14
add r11, r5, r8, asr #14
strh r11, [r1, #2]
strh r10, [r1], +r2
sub r10, r12, r6, asr #14
sub r11, lr, r7, asr #14
strh r11, [r1, #2]
strh r10, [r1], +r2
add r10, r4, r9, asr #14
sub r11, r5, r8, asr #14
strh r11, [r1, #2]
strh r10, [r1], #4
subs r3, r3, #1, 16
bge LBL4
add r12, r2, r2, lsl #1
add r1, r1, r12
sub r0, r0, r12
sub r3, r3, #1
movs lr, r3, lsl #16
bne LBL5
add r0, r0, r12
ldmia sp!, {r1, r3}
mov r2, r2, lsl #2
cmp r3, #2
bgt LBL6
LBL3:
mov r0, #0
ldmia sp!, {r4 - r11, pc}
andeq r3, r1, r0, lsr #32
andeq r10, r1, r12, ror #31
andeq r3, r1, r8, lsr #32
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