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| author | Michael Munday <munday@ca.ibm.com> | 2016-09-14 10:42:14 -0400 |
|---|---|---|
| committer | Michael Munday <munday@ca.ibm.com> | 2016-10-17 19:45:20 +0000 |
| commit | 1cfb5c3fd5578a3665231a302ef7f03abec78d1d (patch) | |
| tree | 091e2b6aef827ecef6b626559ac0dd7055b1c80d /src/cmd/asm | |
| parent | 92221fe8bc73ec6d487bd479f9739fdddb6fcada (diff) | |
| download | go-1cfb5c3fd5578a3665231a302ef7f03abec78d1d.tar.xz | |
cmd/compile: merge loads into operations on s390x
Adds the new canMergeLoad function which can be used by rules to
decide whether a load can be merged into an operation. The function
ensures that the merge will not reorder the load relative to memory
operations (for example, stores) in such a way that the block can no
longer be scheduled.
This new function enables transformations such as:
MOVD 0(R1), R2
ADD R2, R3
to:
ADD 0(R1), R3
The two-operand form of the following instructions can now read a
single memory operand:
- ADD
- ADDC
- ADDW
- MULLD
- MULLW
- SUB
- SUBC
- SUBE
- SUBW
- AND
- ANDW
- OR
- ORW
- XOR
- XORW
Improves SHA3 performance by 6-8%.
Updates #15054.
Change-Id: Ibcb9122126cd1a26f2c01c0dfdbb42fe5e7b5b94
Reviewed-on: https://go-review.googlesource.com/29272
Run-TryBot: Michael Munday <munday@ca.ibm.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Keith Randall <khr@golang.org>
Diffstat (limited to 'src/cmd/asm')
| -rw-r--r-- | src/cmd/asm/internal/asm/testdata/s390x.s | 29 |
1 files changed, 29 insertions, 0 deletions
diff --git a/src/cmd/asm/internal/asm/testdata/s390x.s b/src/cmd/asm/internal/asm/testdata/s390x.s index e8117f6634..0621261e13 100644 --- a/src/cmd/asm/internal/asm/testdata/s390x.s +++ b/src/cmd/asm/internal/asm/testdata/s390x.s @@ -144,6 +144,35 @@ TEXT main·foo(SB),7,$16-0 // TEXT main.foo(SB), 7, $16-0 XORW $65536, R1 // c01700010000 XORW $-2, R1 // c017fffffffe + ADD -524288(R1), R2 // e32010008008 + ADD 524287(R3), R4 // e3403fff7f08 + ADD -524289(R1), R2 // c0a1fff7ffffe32a10000008 + ADD 524288(R3), R4 // c0a100080000e34a30000008 + ADD -524289(R1)(R2*1), R3 // c0a1fff7ffff41aa2000e33a10000008 + ADD 524288(R3)(R4*1), R5 // c0a10008000041aa4000e35a30000008 + ADDC (R1), R2 // e3201000000a + ADDW (R5), R6 // 5a605000 + ADDW 4095(R7), R8 // 5a807fff + ADDW -1(R1), R2 // e3201fffff5a + ADDW 4096(R3), R4 // e3403000015a + MULLD (R1)(R2*1), R3 // e3321000000c + MULLW (R3)(R4*1), R5 // 71543000 + MULLW 4096(R3), R4 // e34030000151 + SUB (R1), R2 // e32010000009 + SUBC (R1), R2 // e3201000000b + SUBE (R1), R2 // e32010000089 + SUBW (R1), R2 // 5b201000 + SUBW -1(R1), R2 // e3201fffff5b + AND (R1), R2 // e32010000080 + ANDW (R1), R2 // 54201000 + ANDW -1(R1), R2 // e3201fffff54 + OR (R1), R2 // e32010000081 + ORW (R1), R2 // 56201000 + ORW -1(R1), R2 // e3201fffff56 + XOR (R1), R2 // e32010000082 + XORW (R1), R2 // 57201000 + XORW -1(R1), R2 // e3201fffff57 + LAA R1, R2, 524287(R3) // eb213fff7ff8 LAAG R4, R5, -524288(R6) // eb54600080e8 LAAL R7, R8, 8192(R9) // eb87900002fa |