80 lines
2.5 KiB
ArmAsm
80 lines
2.5 KiB
ArmAsm
.macro push_v_regs
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stp X8, X9, [sp, #-16]!
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stp X10, X11, [sp, #-16]!
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stp X12, X13, [sp, #-16]!
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stp X14, X15, [sp, #-16]!
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stp X20, X21, [sp, #-16]!
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stp X26, X17, [sp, #-16]!
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stp X27, X28, [sp, #-16]!
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stp q2, q3, [sp, #-32]!
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stp q0, q1, [sp, #-32]!
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.endm
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.macro pop_v_regs
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ldp q0, q1, [sp], #32
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ldp q2, q3, [sp], #32
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ldp X27, X28, [sp], #16
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ldp X26, X17, [sp], #16
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ldp X20, X21, [sp], #16
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ldp X14, X15, [sp], #16
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ldp X12, X13, [sp], #16
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ldp X10, X11, [sp], #16
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ldp X8, X9, [sp], #16
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.endm
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.text
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.p2align 2
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.global ixheaacd_shiftrountine_with_rnd_eld
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ixheaacd_shiftrountine_with_rnd_eld:
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push_v_regs
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ADD x12, x2, x3, LSL #1
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MOV W9, #0x00008000
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DUP V0.4s, w9
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MOVI v3.4s, #9
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MOV W27, #0x80000000
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MOV W28, #0x7fffffff
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MOV W26, #0
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SUBS W3, W3, #1
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BMI S_WITH_R_L6
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S_WITH_R_L5:
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LDR w5, [x1, x3, LSL #2] //i2 = qmfImag[j]
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LDR w7, [x0, x3, LSL #2] //x2 = qmfReal[j]
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LDR w14, [x0], #4 //x1 = *qmfReal
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LDR w10, [x1], #4 //i1 = *qmfImag
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ADD w6, w5, w7 //*qmfImag++ = add32(i2, x2)
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MVN w6, w6
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ADD w6, w6, #1
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SUB w5, w7, w5 //qmfReal[j] = sub32(i2, x2)
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ADD w7, w10, w14 //qmfImag[j] = add32(i1, x1)
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MVN w7, w7
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ADD w7, w7, #1
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SUB w4, w14, w10 //*qmfReal++ = sub32(i1, x1)
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MOV v1.s[0], W4 //QADD x4, x4, x9
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MOV v1.s[1], W5 //QADD x4, x4, x9
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MOV v1.s[2], W6 //QADD x4, x4, x9
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MOV v1.s[3], W7 //QADD x4, x4, x9
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lsl w14, w3, #1
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SQSHL v1.4s, v1.4s, v3.4s
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ADD X17, X2, X14
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SQADD v2.4s, v1.4s, v0.4s
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ST1 {v2.h}[1], [x2], #2
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ST1 {v2.h}[3], [X17]
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ADD X17, X12, X14
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ST1 {v2.h}[7], [x17] //STRH w7, [x12, x14]
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ST1 {v2.h}[5], [x12], #2 //STRH w6, [x12], #2
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SUBS x3, x3, #2
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BGE S_WITH_R_L5
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S_WITH_R_L6:
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pop_v_regs
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ret
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