Adding upstream version 1.16.10.upstream/1.16.10upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 169 insertions, 0 deletions

diff --git a/src/math/tanh_s390x.s b/src/math/tanh_s390x.s
new file mode 100644
index 0000000..7e2d4dd
--- /dev/null
+++ b/src/math/tanh_s390x.s
@@ -0,0 +1,169 @@
+// Copyright 2016 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+#include "textflag.h"
+
+// Minimax polynomial approximations
+DATA tanhrodataL18<>+0(SB)/8, $-1.0
+DATA tanhrodataL18<>+8(SB)/8, $-2.0
+DATA tanhrodataL18<>+16(SB)/8, $1.0
+DATA tanhrodataL18<>+24(SB)/8, $2.0
+DATA tanhrodataL18<>+32(SB)/8, $0.20000000000000011868E+01
+DATA tanhrodataL18<>+40(SB)/8, $0.13333333333333341256E+01
+DATA tanhrodataL18<>+48(SB)/8, $0.26666666663549111502E+00
+DATA tanhrodataL18<>+56(SB)/8, $0.66666666658721844678E+00
+DATA tanhrodataL18<>+64(SB)/8, $0.88890217768964374821E-01
+DATA tanhrodataL18<>+72(SB)/8, $0.25397199429103821138E-01
+DATA tanhrodataL18<>+80(SB)/8, $-.346573590279972643E+00
+DATA tanhrodataL18<>+88(SB)/8, $20.E0
+GLOBL tanhrodataL18<>+0(SB), RODATA, $96
+
+// Constants
+DATA tanhrlog2<>+0(SB)/8, $0x4007154760000000
+GLOBL tanhrlog2<>+0(SB), RODATA, $8
+DATA tanhxadd<>+0(SB)/8, $0xc2f0000100003ff0
+GLOBL tanhxadd<>+0(SB), RODATA, $8
+DATA tanhxmone<>+0(SB)/8, $-1.0
+GLOBL tanhxmone<>+0(SB), RODATA, $8
+DATA tanhxzero<>+0(SB)/8, $0
+GLOBL tanhxzero<>+0(SB), RODATA, $8
+
+// Polynomial coefficients
+DATA tanhtab<>+0(SB)/8, $0.000000000000000000E+00
+DATA tanhtab<>+8(SB)/8, $-.171540871271399150E-01
+DATA tanhtab<>+16(SB)/8, $-.306597931864376363E-01
+DATA tanhtab<>+24(SB)/8, $-.410200970469965021E-01
+DATA tanhtab<>+32(SB)/8, $-.486343079978231466E-01
+DATA tanhtab<>+40(SB)/8, $-.538226193725835820E-01
+DATA tanhtab<>+48(SB)/8, $-.568439602538111520E-01
+DATA tanhtab<>+56(SB)/8, $-.579091847395528847E-01
+DATA tanhtab<>+64(SB)/8, $-.571909584179366341E-01
+DATA tanhtab<>+72(SB)/8, $-.548312665987204407E-01
+DATA tanhtab<>+80(SB)/8, $-.509471843643441085E-01
+DATA tanhtab<>+88(SB)/8, $-.456353588448863359E-01
+DATA tanhtab<>+96(SB)/8, $-.389755254243262365E-01
+DATA tanhtab<>+104(SB)/8, $-.310332908285244231E-01
+DATA tanhtab<>+112(SB)/8, $-.218623539150173528E-01
+DATA tanhtab<>+120(SB)/8, $-.115062908917949451E-01
+GLOBL tanhtab<>+0(SB), RODATA, $128
+
+// Tanh returns the hyperbolic tangent of the argument.
+//
+// Special cases are:
+//      Tanh(±0) = ±0
+//      Tanh(±Inf) = ±1
+//      Tanh(NaN) = NaN
+// The algorithm used is minimax polynomial approximation using a table of
+// polynomial coefficients determined with a Remez exchange algorithm.
+
+TEXT ·tanhAsm(SB),NOSPLIT,$0-16
+	FMOVD   x+0(FP), F0
+	// special case Tanh(±0) = ±0
+	FMOVD   $(0.0), F1
+	FCMPU   F0, F1
+	BEQ     tanhIsZero
+	MOVD    $tanhrodataL18<>+0(SB), R5
+	LTDBR	F0, F0
+	MOVD    $0x4034000000000000, R1
+	BLTU    L15
+	FMOVD   F0, F1
+L2:
+	MOVD    $tanhxadd<>+0(SB), R2
+	FMOVD   0(R2), F2
+	MOVD    tanhrlog2<>+0(SB), R2
+	LDGR    R2, F4
+	WFMSDB  V0, V4, V2, V4
+	MOVD    $tanhtab<>+0(SB), R3
+	LGDR    F4, R2
+	RISBGZ	$57, $60, $3, R2, R4
+	WORD    $0xED105058     //cdb %f1,.L19-.L18(%r5)
+	BYTE    $0x00
+	BYTE    $0x19
+	RISBGN	$0, $15, $48, R2, R1
+	WORD    $0x68543000     //ld %f5,0(%r4,%r3)
+	LDGR    R1, F6
+	BLT     L3
+	MOVD    $tanhxzero<>+0(SB), R1
+	FMOVD   0(R1), F2
+	WFCHDBS V0, V2, V4
+	BEQ     L9
+	WFCHDBS V2, V0, V2
+	BNE     L1
+	MOVD    $tanhxmone<>+0(SB), R1
+	FMOVD   0(R1), F0
+	FMOVD   F0, ret+8(FP)
+	RET
+
+L3:
+	FADD    F4, F2
+	FMOVD   tanhrodataL18<>+80(SB), F4
+	FMADD   F4, F2, F0
+	FMOVD   tanhrodataL18<>+72(SB), F1
+	WFMDB   V0, V0, V3
+	FMOVD   tanhrodataL18<>+64(SB), F2
+	WFMADB  V0, V1, V2, V1
+	FMOVD   tanhrodataL18<>+56(SB), F4
+	FMOVD   tanhrodataL18<>+48(SB), F2
+	WFMADB  V1, V3, V4, V1
+	FMOVD   tanhrodataL18<>+40(SB), F4
+	WFMADB  V3, V2, V4, V2
+	FMOVD   tanhrodataL18<>+32(SB), F4
+	WORD    $0xB9270022     //lhr %r2,%r2
+	WFMADB  V3, V1, V4, V1
+	FMOVD   tanhrodataL18<>+24(SB), F4
+	WFMADB  V3, V2, V4, V3
+	WFMADB  V0, V5, V0, V2
+	WFMADB  V0, V1, V3, V0
+	WORD    $0xA7183ECF     //lhi %r1,16079
+	WFMADB  V0, V2, V5, V2
+	FMUL    F6, F2
+	MOVW    R2, R10
+	MOVW    R1, R11
+	CMPBLE  R10, R11, L16
+	FMOVD   F6, F0
+	WORD    $0xED005010     //adb %f0,.L28-.L18(%r5)
+	BYTE    $0x00
+	BYTE    $0x1A
+	WORD    $0xA7184330     //lhi %r1,17200
+	FADD    F2, F0
+	MOVW    R2, R10
+	MOVW    R1, R11
+	CMPBGT  R10, R11, L17
+	WORD    $0xED605010     //sdb %f6,.L28-.L18(%r5)
+	BYTE    $0x00
+	BYTE    $0x1B
+	FADD    F6, F2
+	WFDDB   V0, V2, V0
+	FMOVD   F0, ret+8(FP)
+	RET
+
+L9:
+	FMOVD   tanhrodataL18<>+16(SB), F0
+L1:
+	FMOVD   F0, ret+8(FP)
+	RET
+
+L15:
+	FNEG    F0, F1
+	BR      L2
+L16:
+	FADD    F6, F2
+	FMOVD   tanhrodataL18<>+8(SB), F0
+	FMADD   F4, F2, F0
+	FMOVD   tanhrodataL18<>+0(SB), F4
+	FNEG    F0, F0
+	WFMADB  V0, V2, V4, V0
+	FMOVD   F0, ret+8(FP)
+	RET
+
+L17:
+	WFDDB   V0, V4, V0
+	FMOVD   tanhrodataL18<>+16(SB), F2
+	WFSDB   V0, V2, V0
+	FMOVD   F0, ret+8(FP)
+	RET
+
+tanhIsZero:      //return ±0
+	FMOVD   F0, ret+8(FP)
+	RET