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Commit cdde35bb authored by Niels Möller's avatar Niels Möller
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ARM umac_nh: Use vmlal, 16% speedup.

parent 3be646d1
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ChangeLog
View file @ cdde35bb
2013-04-12 Niels Möller <nisse@lysator.liu.se>
* armv7/umac-nh.asm: New file. 2.1 time speedup.
* armv7/umac-nh.asm: New file. 2.4 time speedup.
* armv7/machine.m4 (D0REG, D1REG): New macros.
* configure.ac (asm_replace_list): Added umac-nh.asm and
......
armv7/umac-nh.asm
View file @ cdde35bb
......@@ -30,7 +30,7 @@ define(<QB>, <q1>)
define(<DM>, <d16>)
define(<QLEFT>, <q9>)
define(<QRIGHT>, <q10>)
define(<QACC>, <q11>)
define(<QY>, <q11>)
define(<QT0>, <q12>)
define(<QT1>, <q13>)
define(<QK0>, <q14>)
......@@ -59,7 +59,7 @@ PROLOGUE(_nettle_umac_nh)
vmov.i32 D0REG(QLEFT)[0], SHIFT
vmov.32 D1REG(QLEFT), D0REG(QLEFT)
vmov.i64 QACC, #0
vmov.i64 QY, #0
vshl.u64 DM, DM, D0REG(QRIGHT)
.Loop:
......@@ -78,14 +78,12 @@ PROLOGUE(_nettle_umac_nh)
vld1.i32 {QK0, QK1}, [KEY]!
vadd.i32 QA, QA, QK0
vadd.i32 QB, QB, QK1
vmull.u32 QT0, D0REG(QA), D0REG(QB)
vmull.u32 QT1, D1REG(QA), D1REG(QB)
subs LENGTH, LENGTH, #32
vadd.i64 QACC, QACC, QT0
vadd.i64 QACC, QACC, QT1
vmlal.u32 QY, D0REG(QA), D0REG(QB)
vmlal.u32 QY, D1REG(QA), D1REG(QB)
bhi .Loop
vadd.i64 D0REG(QACC), D0REG(QACC), D1REG(QACC)
vmov r0, r1, D0REG(QACC)
vadd.i64 D0REG(QY), D0REG(QY), D1REG(QY)
vmov r0, r1, D0REG(QY)
bx lr
EPILOGUE(_nettle_umac_nh)
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