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Diffstat (limited to 'vendor/github.com/klauspost/reedsolomon/galois_arm64.s')
| -rw-r--r-- | vendor/github.com/klauspost/reedsolomon/galois_arm64.s | 125 |
1 files changed, 125 insertions, 0 deletions
diff --git a/vendor/github.com/klauspost/reedsolomon/galois_arm64.s b/vendor/github.com/klauspost/reedsolomon/galois_arm64.s new file mode 100644 index 0000000..d2cac2c --- /dev/null +++ b/vendor/github.com/klauspost/reedsolomon/galois_arm64.s @@ -0,0 +1,125 @@ +//+build !noasm !appengine !gccgo + +// Copyright 2015, Klaus Post, see LICENSE for details. +// Copyright 2017, Minio, Inc. + +#define LOAD(LO1, LO2, HI1, HI2) \ + VLD1.P 32(R1), [LO1.B16, LO2.B16] \ + \ + \ // Get low input and high input + VUSHR $4, LO1.B16, HI1.B16 \ + VUSHR $4, LO2.B16, HI2.B16 \ + VAND V8.B16, LO1.B16, LO1.B16 \ + VAND V8.B16, LO2.B16, LO2.B16 + +#define GALOIS_MUL(MUL_LO, MUL_HI, OUT1, OUT2, TMP1, TMP2) \ + \ // Mul low part and mul high part + VTBL V0.B16, [MUL_LO.B16], OUT1.B16 \ + VTBL V10.B16, [MUL_HI.B16], OUT2.B16 \ + VTBL V1.B16, [MUL_LO.B16], TMP1.B16 \ + VTBL V11.B16, [MUL_HI.B16], TMP2.B16 \ + \ + \ // Combine results + VEOR OUT2.B16, OUT1.B16, OUT1.B16 \ + VEOR TMP2.B16, TMP1.B16, OUT2.B16 + +// func galMulNEON(low, high, in, out []byte) +TEXT ·galMulNEON(SB), 7, $0 + MOVD in_base+48(FP), R1 + MOVD in_len+56(FP), R2 // length of message + MOVD out_base+72(FP), R5 + SUBS $32, R2 + BMI complete + + MOVD low+0(FP), R10 // R10: &low + MOVD high+24(FP), R11 // R11: &high + VLD1 (R10), [V6.B16] + VLD1 (R11), [V7.B16] + + // + // Use an extra instruction below since `VDUP R3, V8.B16` generates assembler error + // WORD $0x4e010c68 // dup v8.16b, w3 + // + MOVD $0x0f, R3 + VMOV R3, V8.B[0] + VDUP V8.B[0], V8.B16 + +loop: + // Main loop + LOAD(V0, V1, V10, V11) + GALOIS_MUL(V6, V7, V4, V5, V14, V15) + + // Store result + VST1.P [V4.D2, V5.D2], 32(R5) + + SUBS $32, R2 + BPL loop + +complete: + RET + +// func galMulXorNEON(low, high, in, out []byte) +TEXT ·galMulXorNEON(SB), 7, $0 + MOVD in_base+48(FP), R1 + MOVD in_len+56(FP), R2 // length of message + MOVD out_base+72(FP), R5 + SUBS $32, R2 + BMI completeXor + + MOVD low+0(FP), R10 // R10: &low + MOVD high+24(FP), R11 // R11: &high + VLD1 (R10), [V6.B16] + VLD1 (R11), [V7.B16] + + // + // Use an extra instruction below since `VDUP R3, V8.B16` generates assembler error + // WORD $0x4e010c68 // dup v8.16b, w3 + // + MOVD $0x0f, R3 + VMOV R3, V8.B[0] + VDUP V8.B[0], V8.B16 + +loopXor: + // Main loop + VLD1 (R5), [V20.B16, V21.B16] + + LOAD(V0, V1, V10, V11) + GALOIS_MUL(V6, V7, V4, V5, V14, V15) + + VEOR V20.B16, V4.B16, V4.B16 + VEOR V21.B16, V5.B16, V5.B16 + + // Store result + VST1.P [V4.D2, V5.D2], 32(R5) + + SUBS $32, R2 + BPL loopXor + +completeXor: + RET + +// func galXorNEON(in, out []byte) +TEXT ·galXorNEON(SB), 7, $0 + MOVD in_base+0(FP), R1 + MOVD in_len+8(FP), R2 // length of message + MOVD out_base+24(FP), R5 + SUBS $32, R2 + BMI completeXor + +loopXor: + // Main loop + VLD1.P 32(R1), [V0.B16, V1.B16] + VLD1 (R5), [V20.B16, V21.B16] + + VEOR V20.B16, V0.B16, V4.B16 + VEOR V21.B16, V1.B16, V5.B16 + + // Store result + VST1.P [V4.D2, V5.D2], 32(R5) + + SUBS $32, R2 + BPL loopXor + +completeXor: + RET + |