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| author | Ruixin(Peter) Bao <ruixin.bao@ibm.com> | 2020-04-27 09:51:01 -0400 |
|---|---|---|
| committer | Michael Munday <mike.munday@ibm.com> | 2020-04-27 20:20:53 +0000 |
| commit | a7e9e84716e2d39b1e7ea7f231334c88f2428260 (patch) | |
| tree | d8bde93146838d708ea629bc51d1ed9b0972d1c3 /src/math | |
| parent | d2f5e4e38c8f3d847a1925344dadbf8fb8cdb180 (diff) | |
| download | go-a7e9e84716e2d39b1e7ea7f231334c88f2428260.tar.gz go-a7e9e84716e2d39b1e7ea7f231334c88f2428260.zip | |
math/big: simplify hasVX checking on s390x
Originally, we use an assembly function that returns a boolean result to
tell whether the machine has vector facility or not. It is now no longer
needed when we can directly use cpu.S390X.HasVX variable.
Change-Id: Ic1dae851982532bcfd9a9453416c112347f21d87
Reviewed-on: https://go-review.googlesource.com/c/go/+/230318
Reviewed-by: Michael Munday <mike.munday@ibm.com>
Run-TryBot: Michael Munday <mike.munday@ibm.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Diffstat (limited to 'src/math')
| -rw-r--r-- | src/math/big/arith_decl_s390x.go | 5 | ||||
| -rw-r--r-- | src/math/big/arith_s390x.s | 22 |
2 files changed, 3 insertions, 24 deletions
diff --git a/src/math/big/arith_decl_s390x.go b/src/math/big/arith_decl_s390x.go index 5973d3cfc1..f1a69e1df0 100644 --- a/src/math/big/arith_decl_s390x.go +++ b/src/math/big/arith_decl_s390x.go @@ -6,12 +6,13 @@ package big +import "internal/cpu" + func addVV_check(z, x, y []Word) (c Word) func addVV_vec(z, x, y []Word) (c Word) func addVV_novec(z, x, y []Word) (c Word) func subVV_check(z, x, y []Word) (c Word) func subVV_vec(z, x, y []Word) (c Word) func subVV_novec(z, x, y []Word) (c Word) -func hasVectorFacility() bool -var hasVX = hasVectorFacility() +var hasVX = cpu.S390X.HasVX diff --git a/src/math/big/arith_s390x.s b/src/math/big/arith_s390x.s index ef0192224f..4891768111 100644 --- a/src/math/big/arith_s390x.s +++ b/src/math/big/arith_s390x.s @@ -9,28 +9,6 @@ // This file provides fast assembly versions for the elementary // arithmetic operations on vectors implemented in arith.go. -TEXT ·hasVectorFacility(SB), NOSPLIT, $24-1 - MOVD $x-24(SP), R1 - XC $24, 0(R1), 0(R1) // clear the storage - MOVD $2, R0 // R0 is the number of double words stored -1 - WORD $0xB2B01000 // STFLE 0(R1) - XOR R0, R0 // reset the value of R0 - MOVBZ z-8(SP), R1 - AND $0x40, R1 - BEQ novector - -vectorinstalled: - // check if the vector instruction has been enabled - VLEIB $0, $0xF, V16 - VLGVB $0, V16, R1 - CMPBNE R1, $0xF, novector - MOVB $1, ret+0(FP) // have vx - RET - -novector: - MOVB $0, ret+0(FP) // no vx - RET - TEXT ·mulWW(SB), NOSPLIT, $0 MOVD x+0(FP), R3 MOVD y+8(FP), R4 |