diff options
Diffstat (limited to 'vendor/golang.org/x/crypto/internal/chacha20')
| -rw-r--r-- | vendor/golang.org/x/crypto/internal/chacha20/chacha_s390x.go | 11 | ||||
| -rw-r--r-- | vendor/golang.org/x/crypto/internal/chacha20/chacha_s390x.s | 23 |
2 files changed, 5 insertions, 29 deletions
diff --git a/vendor/golang.org/x/crypto/internal/chacha20/chacha_s390x.go b/vendor/golang.org/x/crypto/internal/chacha20/chacha_s390x.go index 0c1c671c..aad645b4 100644 --- a/vendor/golang.org/x/crypto/internal/chacha20/chacha_s390x.go +++ b/vendor/golang.org/x/crypto/internal/chacha20/chacha_s390x.go @@ -6,14 +6,13 @@ package chacha20 -var haveAsm = hasVectorFacility() +import ( + "golang.org/x/sys/cpu" +) -const bufSize = 256 +var haveAsm = cpu.S390X.HasVX -// hasVectorFacility reports whether the machine supports the vector -// facility (vx). -// Implementation in asm_s390x.s. -func hasVectorFacility() bool +const bufSize = 256 // xorKeyStreamVX is an assembly implementation of XORKeyStream. It must only // be called when the vector facility is available. diff --git a/vendor/golang.org/x/crypto/internal/chacha20/chacha_s390x.s b/vendor/golang.org/x/crypto/internal/chacha20/chacha_s390x.s index 98427c5e..57df4044 100644 --- a/vendor/golang.org/x/crypto/internal/chacha20/chacha_s390x.s +++ b/vendor/golang.org/x/crypto/internal/chacha20/chacha_s390x.s @@ -258,26 +258,3 @@ tail: MOVD R8, R3 MOVD $0, R4 JMP continue - -// func hasVectorFacility() bool -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 |