1 files changed, 634 insertions, 0 deletions
diff --git a/src/math/pow_s390x.s b/src/math/pow_s390x.s
new file mode 100644
index 0000000..c8758fc
--- /dev/null
+++ b/src/math/pow_s390x.s
@@ -0,0 +1,634 @@
+// Copyright 2017 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"
+
+#define PosInf   0x7FF0000000000000
+#define NaN      0x7FF8000000000001
+#define NegInf   0xFFF0000000000000
+#define PosOne   0x3FF0000000000000
+#define NegOne   0xBFF0000000000000
+#define NegZero  0x8000000000000000
+
+// Minimax polynomial approximation
+DATA ·powrodataL51<> + 0(SB)/8, $-1.0
+DATA ·powrodataL51<> + 8(SB)/8, $1.0
+DATA ·powrodataL51<> + 16(SB)/8, $0.24022650695910110361E+00
+DATA ·powrodataL51<> + 24(SB)/8, $0.69314718055994686185E+00
+DATA ·powrodataL51<> + 32(SB)/8, $0.96181291057109484809E-02
+DATA ·powrodataL51<> + 40(SB)/8, $0.15403814778342868389E-03
+DATA ·powrodataL51<> + 48(SB)/8, $0.55504108652095235601E-01
+DATA ·powrodataL51<> + 56(SB)/8, $0.13333818813168698658E-02
+DATA ·powrodataL51<> + 64(SB)/8, $0.68205322933914439200E-12
+DATA ·powrodataL51<> + 72(SB)/8, $-.18466496523378731640E-01
+DATA ·powrodataL51<> + 80(SB)/8, $0.19697596291603973706E-02
+DATA ·powrodataL51<> + 88(SB)/8, $0.23083120654155209200E+00
+DATA ·powrodataL51<> + 96(SB)/8, $0.55324356012093416771E-06
+DATA ·powrodataL51<> + 104(SB)/8, $-.40340677224649339048E-05
+DATA ·powrodataL51<> + 112(SB)/8, $0.30255507904062541562E-04
+DATA ·powrodataL51<> + 120(SB)/8, $-.77453979912413008787E-07
+DATA ·powrodataL51<> + 128(SB)/8, $-.23637115549923464737E-03
+DATA ·powrodataL51<> + 136(SB)/8, $0.11016119077267717198E-07
+DATA ·powrodataL51<> + 144(SB)/8, $0.22608272174486123035E-09
+DATA ·powrodataL51<> + 152(SB)/8, $-.15895808101370190382E-08
+DATA ·powrodataL51<> + 160(SB)/8, $0x4540190000000000
+GLOBL ·powrodataL51<> + 0(SB), RODATA, $168
+
+// Constants
+DATA ·pow_x001a<> + 0(SB)/8, $0x1a000000000000
+GLOBL ·pow_x001a<> + 0(SB), RODATA, $8
+DATA ·pow_xinf<> + 0(SB)/8, $0x7ff0000000000000      //+Inf
+GLOBL ·pow_xinf<> + 0(SB), RODATA, $8
+DATA ·pow_xnan<> + 0(SB)/8, $0x7ff8000000000000      //NaN
+GLOBL ·pow_xnan<> + 0(SB), RODATA, $8
+DATA ·pow_x434<> + 0(SB)/8, $0x4340000000000000
+GLOBL ·pow_x434<> + 0(SB), RODATA, $8
+DATA ·pow_x433<> + 0(SB)/8, $0x4330000000000000
+GLOBL ·pow_x433<> + 0(SB), RODATA, $8
+DATA ·pow_x43f<> + 0(SB)/8, $0x43f0000000000000
+GLOBL ·pow_x43f<> + 0(SB), RODATA, $8
+DATA ·pow_xadd<> + 0(SB)/8, $0xc2f0000100003fef
+GLOBL ·pow_xadd<> + 0(SB), RODATA, $8
+DATA ·pow_xa<> + 0(SB)/8, $0x4019000000000000
+GLOBL ·pow_xa<> + 0(SB), RODATA, $8
+
+// Scale correction tables
+DATA powiadd<> + 0(SB)/8, $0xf000000000000000
+DATA powiadd<> + 8(SB)/8, $0x1000000000000000
+GLOBL powiadd<> + 0(SB), RODATA, $16
+DATA powxscale<> + 0(SB)/8, $0x4ff0000000000000
+DATA powxscale<> + 8(SB)/8, $0x2ff0000000000000
+GLOBL powxscale<> + 0(SB), RODATA, $16
+
+// Fractional powers of 2 table
+DATA ·powtexp<> + 0(SB)/8, $0.442737824274138381E-01
+DATA ·powtexp<> + 8(SB)/8, $0.263602189790660309E-01
+DATA ·powtexp<> + 16(SB)/8, $0.122565642281703586E-01
+DATA ·powtexp<> + 24(SB)/8, $0.143757052860721398E-02
+DATA ·powtexp<> + 32(SB)/8, $-.651375034121276075E-02
+DATA ·powtexp<> + 40(SB)/8, $-.119317678849450159E-01
+DATA ·powtexp<> + 48(SB)/8, $-.150868749549871069E-01
+DATA ·powtexp<> + 56(SB)/8, $-.161992609578469234E-01
+DATA ·powtexp<> + 64(SB)/8, $-.154492360403337917E-01
+DATA ·powtexp<> + 72(SB)/8, $-.129850717389178721E-01
+DATA ·powtexp<> + 80(SB)/8, $-.892902649276657891E-02
+DATA ·powtexp<> + 88(SB)/8, $-.338202636596794887E-02
+DATA ·powtexp<> + 96(SB)/8, $0.357266307045684762E-02
+DATA ·powtexp<> + 104(SB)/8, $0.118665304327406698E-01
+DATA ·powtexp<> + 112(SB)/8, $0.214434994118118914E-01
+DATA ·powtexp<> + 120(SB)/8, $0.322580645161290314E-01
+GLOBL ·powtexp<> + 0(SB), RODATA, $128
+
+// Log multiplier tables
+DATA ·powtl<> + 0(SB)/8, $0xbdf9723a80db6a05
+DATA ·powtl<> + 8(SB)/8, $0x3e0cfe4a0babe862
+DATA ·powtl<> + 16(SB)/8, $0xbe163b42dd33dada
+DATA ·powtl<> + 24(SB)/8, $0xbe0cdf9de2a8429c
+DATA ·powtl<> + 32(SB)/8, $0xbde9723a80db6a05
+DATA ·powtl<> + 40(SB)/8, $0xbdb37fcae081745e
+DATA ·powtl<> + 48(SB)/8, $0xbdd8b2f901ac662c
+DATA ·powtl<> + 56(SB)/8, $0xbde867dc68c36cc9
+DATA ·powtl<> + 64(SB)/8, $0xbdd23e36b47256b7
+DATA ·powtl<> + 72(SB)/8, $0xbde4c9b89fcc7933
+DATA ·powtl<> + 80(SB)/8, $0xbdd16905cad7cf66
+DATA ·powtl<> + 88(SB)/8, $0x3ddb417414aa5529
+DATA ·powtl<> + 96(SB)/8, $0xbdce046f2889983c
+DATA ·powtl<> + 104(SB)/8, $0x3dc2c3865d072897
+DATA ·powtl<> + 112(SB)/8, $0x8000000000000000
+DATA ·powtl<> + 120(SB)/8, $0x3dc1ca48817f8afe
+DATA ·powtl<> + 128(SB)/8, $0xbdd703518a88bfb7
+DATA ·powtl<> + 136(SB)/8, $0x3dc64afcc46942ce
+DATA ·powtl<> + 144(SB)/8, $0xbd9d79191389891a
+DATA ·powtl<> + 152(SB)/8, $0x3ddd563044da4fa0
+DATA ·powtl<> + 160(SB)/8, $0x3e0f42b5e5f8f4b6
+DATA ·powtl<> + 168(SB)/8, $0x3e0dfa2c2cbf6ead
+DATA ·powtl<> + 176(SB)/8, $0x3e14e25e91661293
+DATA ·powtl<> + 184(SB)/8, $0x3e0aac461509e20c
+GLOBL ·powtl<> + 0(SB), RODATA, $192
+
+DATA ·powtm<> + 0(SB)/8, $0x3da69e13
+DATA ·powtm<> + 8(SB)/8, $0x100003d66fcb6
+DATA ·powtm<> + 16(SB)/8, $0x200003d1538df
+DATA ·powtm<> + 24(SB)/8, $0x300003cab729e
+DATA ·powtm<> + 32(SB)/8, $0x400003c1a784c
+DATA ·powtm<> + 40(SB)/8, $0x500003ac9b074
+DATA ·powtm<> + 48(SB)/8, $0x60000bb498d22
+DATA ·powtm<> + 56(SB)/8, $0x68000bb8b29a2
+DATA ·powtm<> + 64(SB)/8, $0x70000bb9a32d4
+DATA ·powtm<> + 72(SB)/8, $0x74000bb9946bb
+DATA ·powtm<> + 80(SB)/8, $0x78000bb92e34b
+DATA ·powtm<> + 88(SB)/8, $0x80000bb6c57dc
+DATA ·powtm<> + 96(SB)/8, $0x84000bb4020f7
+DATA ·powtm<> + 104(SB)/8, $0x8c000ba93832d
+DATA ·powtm<> + 112(SB)/8, $0x9000080000000
+DATA ·powtm<> + 120(SB)/8, $0x940003aa66c4c
+DATA ·powtm<> + 128(SB)/8, $0x980003b2fb12a
+DATA ·powtm<> + 136(SB)/8, $0xa00003bc1def6
+DATA ·powtm<> + 144(SB)/8, $0xa80003c1eb0eb
+DATA ·powtm<> + 152(SB)/8, $0xb00003c64dcec
+DATA ·powtm<> + 160(SB)/8, $0xc00003cc49e4e
+DATA ·powtm<> + 168(SB)/8, $0xd00003d12f1de
+DATA ·powtm<> + 176(SB)/8, $0xe00003d4a9c6f
+DATA ·powtm<> + 184(SB)/8, $0xf00003d846c66
+GLOBL ·powtm<> + 0(SB), RODATA, $192
+
+// Table of indices into multiplier tables
+// Adjusted from asm to remove offset and convert
+DATA ·powtabi<> + 0(SB)/8, $0x1010101
+DATA ·powtabi<> + 8(SB)/8, $0x101020202020203
+DATA ·powtabi<> + 16(SB)/8, $0x303030404040405
+DATA ·powtabi<> + 24(SB)/8, $0x505050606060708
+DATA ·powtabi<> + 32(SB)/8, $0x90a0b0c0d0e0f10
+DATA ·powtabi<> + 40(SB)/8, $0x1011111212121313
+DATA ·powtabi<> + 48(SB)/8, $0x1314141414151515
+DATA ·powtabi<> + 56(SB)/8, $0x1516161617171717
+GLOBL ·powtabi<> + 0(SB), RODATA, $64
+
+// Pow returns x**y, the base-x exponential of y.
+//
+// Special cases are (in order):
+//      Pow(x, ±0) = 1 for any x
+//      Pow(1, y) = 1 for any y
+//      Pow(x, 1) = x for any x
+//      Pow(NaN, y) = NaN
+//      Pow(x, NaN) = NaN
+//      Pow(±0, y) = ±Inf for y an odd integer < 0
+//      Pow(±0, -Inf) = +Inf
+//      Pow(±0, +Inf) = +0
+//      Pow(±0, y) = +Inf for finite y < 0 and not an odd integer
+//      Pow(±0, y) = ±0 for y an odd integer > 0
+//      Pow(±0, y) = +0 for finite y > 0 and not an odd integer
+//      Pow(-1, ±Inf) = 1
+//      Pow(x, +Inf) = +Inf for |x| > 1
+//      Pow(x, -Inf) = +0 for |x| > 1
+//      Pow(x, +Inf) = +0 for |x| < 1
+//      Pow(x, -Inf) = +Inf for |x| < 1
+//      Pow(+Inf, y) = +Inf for y > 0
+//      Pow(+Inf, y) = +0 for y < 0
+//      Pow(-Inf, y) = Pow(-0, -y)
+//      Pow(x, y) = NaN for finite x < 0 and finite non-integer y
+
+TEXT	·powAsm(SB), NOSPLIT, $0-24
+	// special case
+	MOVD	x+0(FP), R1
+	MOVD	y+8(FP), R2
+
+	// special case Pow(1, y) = 1 for any y
+	MOVD	$PosOne, R3
+	CMPUBEQ	R1, R3, xIsOne
+
+	// special case Pow(x, 1) = x for any x
+	MOVD	$PosOne, R4
+	CMPUBEQ	R2, R4, yIsOne
+
+	// special case Pow(x, NaN) = NaN for any x
+	MOVD	$~(1<<63), R5
+	AND	R2, R5    // y = |y|
+	MOVD	$PosInf, R4
+	CMPUBLT R4, R5, yIsNan
+
+	MOVD	$NegInf, R3
+	CMPUBEQ	R1, R3, xIsNegInf
+
+	MOVD	$NegOne, R3
+	CMPUBEQ	R1, R3, xIsNegOne
+
+	MOVD	$PosInf, R3
+	CMPUBEQ	R1, R3, xIsPosInf
+
+	MOVD	$NegZero, R3
+	CMPUBEQ	R1, R3, xIsNegZero
+
+	MOVD	$PosInf, R4
+	CMPUBEQ	R2, R4, yIsPosInf
+
+	MOVD	$0x0, R3
+	CMPUBEQ	R1, R3, xIsPosZero
+	CMPBLT	R1, R3, xLtZero
+	BR	Normal
+xIsPosInf:
+	// special case Pow(+Inf, y) = +Inf for y > 0
+	MOVD	$0x0, R4
+	CMPBGT	R2, R4, posInfGeZero
+	BR	Normal
+xIsNegInf:
+	//Pow(-Inf, y) = Pow(-0, -y)
+	FMOVD y+8(FP), F2
+	FNEG F2, F2			// y = -y
+	BR negZeroNegY		// call Pow(-0, -y)
+xIsNegOne:
+	// special case Pow(-1, ±Inf) = 1
+	MOVD	$PosInf, R4
+	CMPUBEQ	R2, R4, negOnePosInf
+	MOVD	$NegInf, R4
+	CMPUBEQ	R2, R4, negOneNegInf
+	BR	Normal
+xIsPosZero:
+	// special case Pow(+0, -Inf) = +Inf
+	MOVD	$NegInf, R4
+	CMPUBEQ	R2, R4, zeroNegInf
+
+	// special case Pow(+0, y < 0) = +Inf
+	FMOVD	y+8(FP), F2
+	FMOVD	$(0.0), F4
+	FCMPU	F2, F4
+	BLT	posZeroLtZero				//y < 0.0
+	BR	Normal
+xIsNegZero:
+	// special case Pow(-0, -Inf) = +Inf
+	MOVD	$NegInf, R4
+	CMPUBEQ	R2, R4, zeroNegInf
+	FMOVD	y+8(FP), F2
+negZeroNegY:
+	// special case Pow(x, ±0) = 1 for any x
+	FMOVD	$(0.0), F4
+	FCMPU	F4, F2
+	BLT	negZeroGtZero		// y > 0.0
+	BEQ yIsZero				// y = 0.0
+
+	FMOVD $(-0.0), F4
+	FCMPU F4, F2
+	BLT negZeroGtZero				// y > -0.0
+	BEQ yIsZero				// y = -0.0
+
+	// special case Pow(-0, y) = -Inf for y an odd integer < 0
+	// special case Pow(-0, y) = +Inf for finite y < 0 and not an odd integer
+	FIDBR	$5, F2, F4		//F2 translate to integer F4
+	FCMPU	F2, F4
+	BNE	zeroNotOdd			// y is not an (odd) integer and y < 0
+	FMOVD	$(2.0), F4
+	FDIV	F4, F2			// F2 = F2 / 2.0
+	FIDBR	$5, F2, F4		//F2 translate to integer F4
+	FCMPU	F2, F4
+	BNE	negZeroOddInt		// y is an odd integer and y < 0
+	BR	zeroNotOdd			// y is not an (odd) integer and y < 0
+
+negZeroGtZero:
+	// special case Pow(-0, y) = -0 for y an odd integer > 0
+	// special case Pow(±0, y) = +0 for finite y > 0 and not an odd integer
+	FIDBR	$5, F2, F4      //F2 translate to integer F4
+	FCMPU	F2, F4
+	BNE	zeroNotOddGtZero    // y is not an (odd) integer and y > 0
+	FMOVD	$(2.0), F4
+	FDIV	F4, F2          // F2 = F2 / 2.0
+	FIDBR	$5, F2, F4      //F2 translate to integer F4
+	FCMPU	F2, F4
+	BNE	negZeroOddIntGtZero       // y is an odd integer and y > 0
+	BR	zeroNotOddGtZero          // y is not an (odd) integer
+
+xLtZero:
+	// special case Pow(x, y) = NaN for finite x < 0 and finite non-integer y
+	FMOVD	y+8(FP), F2
+	FIDBR	$5, F2, F4
+	FCMPU	F2, F4
+	BNE	ltZeroInt
+	BR	Normal
+yIsPosInf:
+	// special case Pow(x, +Inf) = +Inf for |x| > 1
+	FMOVD	x+0(FP), F1
+	FMOVD	$(1.0), F3
+	FCMPU	F1, F3
+	BGT	gtOnePosInf
+	FMOVD	$(-1.0), F3
+	FCMPU	F1, F3
+	BLT	ltNegOnePosInf
+Normal:
+	FMOVD	x+0(FP), F0
+	FMOVD	y+8(FP), F2
+	MOVD	$·powrodataL51<>+0(SB), R9
+	LGDR	F0, R3
+	WORD	$0xC0298009	//iilf	%r2,2148095317
+	BYTE	$0x55
+	BYTE	$0x55
+	RISBGNZ	$32, $63, $32, R3, R1
+	SUBW	R1, R2
+	RISBGNZ	$58, $63, $50, R2, R3
+	BYTE	$0x18	//lr	%r5,%r1
+	BYTE	$0x51
+	MOVD	$·powtabi<>+0(SB), R12
+	WORD	$0xE303C000	//llgc	%r0,0(%r3,%r12)
+	BYTE	$0x00
+	BYTE	$0x90
+	SUBW	$0x1A0000, R5
+	SLD	$3, R0, R3
+	MOVD	$·powtm<>+0(SB), R4
+	MOVH	$0x0, R8
+	ANDW	$0x7FF00000, R2
+	ORW	R5, R1
+	WORD	$0x5A234000	//a	%r2,0(%r3,%r4)
+	MOVD	$0x3FF0000000000000, R5
+	RISBGZ	$40, $63, $56, R2, R3
+	RISBGN	$0, $31, $32, R2, R8
+	ORW	$0x45000000, R3
+	MOVW	R1, R6
+	CMPBLT	R6, $0, L42
+	FMOVD	F0, F4
+L2:
+	VLVGF	$0, R3, V1
+	MOVD	$·pow_xa<>+0(SB), R2
+	WORD	$0xED3090A0	//lde	%f3,.L52-.L51(%r9)
+	BYTE	$0x00
+	BYTE	$0x24
+	FMOVD	0(R2), F6
+	FSUBS	F1, F3
+	LDGR	R8, F1
+	WFMSDB	V4, V1, V6, V4
+	FMOVD	152(R9), F6
+	WFMDB	V4, V4, V7
+	FMOVD	144(R9), F1
+	FMOVD	136(R9), F5
+	WFMADB	V4, V1, V6, V1
+	VLEG	$0, 128(R9), V16
+	FMOVD	120(R9), F6
+	WFMADB	V4, V5, V6, V5
+	FMOVD	112(R9), F6
+	WFMADB	V1, V7, V5, V1
+	WFMADB	V4, V6, V16, V16
+	SLD	$3, R0, R2
+	FMOVD	104(R9), F5
+	WORD	$0xED824004	//ldeb	%f8,4(%r2,%r4)
+	BYTE	$0x00
+	BYTE	$0x04
+	LDEBR	F3, F3
+	FMOVD	96(R9), F6
+	WFMADB	V4, V6, V5, V6
+	FADD	F8, F3
+	WFMADB	V7, V6, V16, V6
+	FMUL	F7, F7
+	FMOVD	88(R9), F5
+	FMADD	F7, F1, F6
+	WFMADB	V4, V5, V3, V16
+	FMOVD	80(R9), F1
+	WFSDB	V16, V3, V3
+	MOVD	$·powtl<>+0(SB), R3
+	WFMADB	V4, V6, V1, V6
+	FMADD	F5, F4, F3
+	FMOVD	72(R9), F1
+	WFMADB	V4, V6, V1, V6
+	WORD	$0xED323000	//adb	%f3,0(%r2,%r3)
+	BYTE	$0x00
+	BYTE	$0x1A
+	FMOVD	64(R9), F1
+	WFMADB	V4, V6, V1, V6
+	MOVD	$·pow_xadd<>+0(SB), R2
+	WFMADB	V4, V6, V3, V4
+	FMOVD	0(R2), F5
+	WFADB	V4, V16, V3
+	VLEG	$0, 56(R9), V20
+	WFMSDB	V2, V3, V5, V3
+	VLEG	$0, 48(R9), V18
+	WFADB	V3, V5, V6
+	LGDR	F3, R2
+	WFMSDB	V2, V16, V6, V16
+	FMOVD	40(R9), F1
+	WFMADB	V2, V4, V16, V4
+	FMOVD	32(R9), F7
+	WFMDB	V4, V4, V3
+	WFMADB	V4, V1, V20, V1
+	WFMADB	V4, V7, V18, V7
+	VLEG	$0, 24(R9), V16
+	WFMADB	V1, V3, V7, V1
+	FMOVD	16(R9), F5
+	WFMADB	V4, V5, V16, V5
+	RISBGZ	$57, $60, $3, R2, R4
+	WFMADB	V3, V1, V5, V1
+	MOVD	$·powtexp<>+0(SB), R3
+	WORD	$0x68343000	//ld	%f3,0(%r4,%r3)
+	FMADD	F3, F4, F4
+	RISBGN	$0, $15, $48, R2, R5
+	WFMADB	V4, V1, V3, V4
+	LGDR	F6, R2
+	LDGR	R5, F1
+	SRAD	$48, R2, R2
+	FMADD	F1, F4, F1
+	RLL	$16, R2, R2
+	ANDW	$0x7FFF0000, R2
+	WORD	$0xC22B3F71	//alfi	%r2,1064370176
+	BYTE	$0x00
+	BYTE	$0x00
+	ORW	R2, R1, R3
+	MOVW	R3, R6
+	CMPBLT	R6, $0, L43
+L1:
+	FMOVD	F1, ret+16(FP)
+	RET
+L43:
+	LTDBR	F0, F0
+	BLTU	L44
+	FMOVD	F0, F3
+L7:
+	MOVD	$·pow_xinf<>+0(SB), R3
+	FMOVD	0(R3), F5
+	WFCEDBS	V3, V5, V7
+	BVS	L8
+	WFMDB	V3, V2, V6
+L8:
+	WFCEDBS	V2, V2, V3
+	BVS	L9
+	LTDBR	F2, F2
+	BEQ	L26
+	MOVW	R1, R6
+	CMPBLT	R6, $0, L45
+L11:
+	WORD	$0xC0190003	//iilf	%r1,262143
+	BYTE	$0xFF
+	BYTE	$0xFF
+	MOVW	R2, R7
+	MOVW	R1, R6
+	CMPBLE	R7, R6, L34
+	RISBGNZ	$32, $63, $32, R5, R1
+	LGDR	F6, R2
+	MOVD	$powiadd<>+0(SB), R3
+	RISBGZ	$60, $60, $4, R2, R2
+	WORD	$0x5A123000	//a	%r1,0(%r2,%r3)
+	RISBGN	$0, $31, $32, R1, R5
+	LDGR	R5, F1
+	FMADD	F1, F4, F1
+	MOVD	$powxscale<>+0(SB), R1
+	WORD	$0xED121000	//mdb	%f1,0(%r2,%r1)
+	BYTE	$0x00
+	BYTE	$0x1C
+	BR	L1
+L42:
+	LTDBR	F0, F0
+	BLTU	L46
+	FMOVD	F0, F4
+L3:
+	MOVD	$·pow_x001a<>+0(SB), R2
+	WORD	$0xED402000	//cdb	%f4,0(%r2)
+	BYTE	$0x00
+	BYTE	$0x19
+	BGE	L2
+	BVS	L2
+	MOVD	$·pow_x43f<>+0(SB), R2
+	WORD	$0xED402000	//mdb	%f4,0(%r2)
+	BYTE	$0x00
+	BYTE	$0x1C
+	WORD	$0xC0298009	//iilf	%r2,2148095317
+	BYTE	$0x55
+	BYTE	$0x55
+	LGDR	F4, R3
+	RISBGNZ	$32, $63, $32, R3, R3
+	SUBW	R3, R2, R3
+	RISBGZ	$33, $43, $0, R3, R2
+	RISBGNZ	$58, $63, $50, R3, R3
+	WORD	$0xE303C000	//llgc	%r0,0(%r3,%r12)
+	BYTE	$0x00
+	BYTE	$0x90
+	SLD	$3, R0, R3
+	WORD	$0x5A234000	//a	%r2,0(%r3,%r4)
+	BYTE	$0x18	//lr	%r3,%r2
+	BYTE	$0x32
+	RISBGN	$0, $31, $32, R3, R8
+	ADDW	$0x4000000, R3
+	BLEU	L5
+	RISBGZ	$40, $63, $56, R3, R3
+	ORW	$0x45000000, R3
+	BR	L2
+L9:
+	WFCEDBS	V0, V0, V4
+	BVS	L35
+	FMOVD	F2, F1
+	BR	L1
+L46:
+	WORD	$0xB3130040	//lcdbr	%f4,%f0
+	BR	L3
+L44:
+	WORD	$0xB3130030	//lcdbr	%f3,%f0
+	BR	L7
+L35:
+	FMOVD	F0, F1
+	BR	L1
+L26:
+	FMOVD	8(R9), F1
+	BR	L1
+L34:
+	FMOVD	8(R9), F4
+L19:
+	LTDBR	F6, F6
+	BLEU	L47
+L18:
+	WFMDB	V4, V5, V1
+	BR	L1
+L5:
+	RISBGZ	$33, $50, $63, R3, R3
+	WORD	$0xC23B4000	//alfi	%r3,1073741824
+	BYTE	$0x00
+	BYTE	$0x00
+	RLL	$24, R3, R3
+	ORW	$0x45000000, R3
+	BR	L2
+L45:
+	WFCEDBS	V0, V0, V4
+	BVS	L35
+	LTDBR	F0, F0
+	BLEU	L48
+	FMOVD	8(R9), F4
+L12:
+	MOVW	R2, R6
+	CMPBLT	R6, $0, L19
+	FMUL	F4, F1
+	BR	L1
+L47:
+	BLT	L40
+	WFCEDBS	V0, V0, V2
+	BVS	L49
+L16:
+	MOVD	·pow_xnan<>+0(SB), R1
+	LDGR	R1, F0
+	WFMDB	V4, V0, V1
+	BR	L1
+L48:
+	LGDR	F0, R3
+	RISBGNZ	$32, $63, $32, R3, R1
+	MOVW	R1, R6
+	CMPBEQ	R6, $0, L29
+	LTDBR	F2, F2
+	BLTU	L50
+	FMOVD	F2, F4
+L14:
+	MOVD	$·pow_x433<>+0(SB), R1
+	FMOVD	0(R1), F7
+	WFCHDBS	V4, V7, V3
+	BEQ	L15
+	WFADB	V7, V4, V3
+	FSUB	F7, F3
+	WFCEDBS	V4, V3, V3
+	BEQ	L15
+	LTDBR	F0, F0
+	FMOVD	8(R9), F4
+	BNE	L16
+L13:
+	LTDBR	F2, F2
+	BLT	L18
+L40:
+	FMOVD	$0, F0
+	WFMDB	V4, V0, V1
+	BR	L1
+L49:
+	WFMDB	V0, V4, V1
+	BR	L1
+L29:
+	FMOVD	8(R9), F4
+	BR	L13
+L15:
+	MOVD	$·pow_x434<>+0(SB), R1
+	FMOVD	0(R1), F7
+	WFCHDBS	V4, V7, V3
+	BEQ	L32
+	WFADB	V7, V4, V3
+	FSUB	F7, F3
+	WFCEDBS	V4, V3, V4
+	BEQ	L32
+	FMOVD	0(R9), F4
+L17:
+	LTDBR	F0, F0
+	BNE	L12
+	BR	L13
+L32:
+	FMOVD	8(R9), F4
+	BR	L17
+L50:
+	WORD	$0xB3130042	//lcdbr	%f4,%f2
+	BR	L14
+xIsOne:			// Pow(1, y) = 1 for any y
+yIsOne:			// Pow(x, 1) = x for any x
+posInfGeZero:	// Pow(+Inf, y) = +Inf for y > 0
+	MOVD	R1, ret+16(FP)
+	RET
+yIsNan:			//  Pow(NaN, y) = NaN
+ltZeroInt:		// Pow(x, y) = NaN for finite x < 0 and finite non-integer y
+	MOVD	$NaN, R2
+	MOVD	R2, ret+16(FP)
+	RET
+negOnePosInf:	// Pow(-1, ±Inf) = 1
+negOneNegInf:
+	MOVD	$PosOne, R3
+	MOVD	R3, ret+16(FP)
+	RET
+negZeroOddInt:
+	MOVD	$NegInf, R3
+	MOVD	R3, ret+16(FP)
+	RET
+zeroNotOdd:		// Pow(±0, y) = +Inf for finite y < 0 and not an odd integer
+posZeroLtZero:	// special case Pow(+0, y < 0) = +Inf
+zeroNegInf:		// Pow(±0, -Inf) = +Inf
+	MOVD	$PosInf, R3
+	MOVD	R3, ret+16(FP)
+	RET
+gtOnePosInf:	//Pow(x, +Inf) = +Inf for |x| > 1
+ltNegOnePosInf:
+	MOVD	R2, ret+16(FP)
+	RET
+yIsZero:		//Pow(x, ±0) = 1 for any x
+	MOVD	$PosOne, R4
+	MOVD	R4, ret+16(FP)
+	RET
+negZeroOddIntGtZero:        // Pow(-0, y) = -0 for y an odd integer > 0
+	MOVD	$NegZero, R3
+	MOVD	R3, ret+16(FP)
+	RET
+zeroNotOddGtZero:        // Pow(±0, y) = +0 for finite y > 0 and not an odd integer
+	MOVD	$0, ret+16(FP)
+	RET