diff --git a/sm9/bn256/select_decl.go b/sm9/bn256/select_decl.go
index 28b3676..28ecce9 100644
--- a/sm9/bn256/select_decl.go
+++ b/sm9/bn256/select_decl.go
@@ -1,4 +1,4 @@
-//go:build (amd64 || arm64) && !purego
+//go:build (amd64 || arm64 || ppc64 || ppc64le) && !purego
 
 package bn256
 
diff --git a/sm9/bn256/select_generic.go b/sm9/bn256/select_generic.go
index 48d4a72..b6acdbc 100644
--- a/sm9/bn256/select_generic.go
+++ b/sm9/bn256/select_generic.go
@@ -1,4 +1,4 @@
-//go:build purego || !(amd64 || arm64)
+//go:build purego || !(amd64 || arm64 || ppc64 || ppc64le)
 
 package bn256
 
diff --git a/sm9/bn256/select_ppc64x.s b/sm9/bn256/select_ppc64x.s
new file mode 100644
index 0000000..4e9edc5
--- /dev/null
+++ b/sm9/bn256/select_ppc64x.s
@@ -0,0 +1,288 @@
+// Copyright 2024 Sun Yimin. All rights reserved.
+// Use of this source code is governed by a MIT-style
+// license that can be found in the LICENSE file.
+
+//go:build (ppc64 || ppc64le) && !purego
+
+#include "textflag.h"
+
+#define res_ptr R3
+#define a_ptr R4
+#define b_ptr R5
+
+// func gfpCopy(res, a *gfP)
+TEXT ·gfpCopy(SB),NOSPLIT,$0
+	MOVD res+0(FP), res_ptr
+	MOVD a+8(FP), a_ptr
+	MOVD $16, R10
+
+	LXVD2X (a_ptr)(R0), V0
+	LXVD2X (a_ptr)(R10), V1
+
+	STXVD2X V0, (res_ptr)(R0)
+	STXVD2X V1, (res_ptr)(R10)
+	RET
+
+#define copyFirst64 \
+	LXVD2X (a_ptr)(R0), V0     \
+	LXVD2X (a_ptr)(R6), V1     \
+	LXVD2X (a_ptr)(R7), V2     \
+	LXVD2X (a_ptr)(R8), V3     \
+	STXVD2X V0, (res_ptr)(R0)     \
+	STXVD2X V1, (res_ptr)(R6)     \
+	STXVD2X V2, (res_ptr)(R7)     \
+	STXVD2X V3, (res_ptr)(R8)
+
+#define copyNext64 \
+	LXVD2X (a_ptr)(R6), V0     \
+	LXVD2X (a_ptr)(R7), V1     \
+	LXVD2X (a_ptr)(R8), V2     \
+	LXVD2X (a_ptr)(R9), V3     \
+	STXVD2X V0, (res_ptr)(R6)     \
+	STXVD2X V1, (res_ptr)(R7)     \
+	STXVD2X V2, (res_ptr)(R8)     \
+	STXVD2X V3, (res_ptr)(R9)     \
+
+// func gfp2Copy(res, a *gfP2)
+TEXT ·gfp2Copy(SB),NOSPLIT,$0
+	MOVD res+0(FP), res_ptr
+	MOVD a+8(FP), a_ptr
+	MOVD $16, R6
+	MOVD $32, R7
+	MOVD $48, R8
+
+	copyFirst64
+	RET
+
+/* ---------------------------------------*/
+// func gfp4Copy(res, a *gfP4)
+TEXT ·gfp4Copy(SB),NOSPLIT,$0
+	MOVD res+0(FP), res_ptr
+	MOVD a+8(FP), a_ptr
+	MOVD $16, R6
+	MOVD $32, R7
+	MOVD $48, R8
+
+	copyFirst64
+
+	MOVD $0x40, R6
+	MOVD $0x50, R7
+	MOVD $0x60, R8
+	MOVD $0x70, R9
+
+	copyNext64
+
+	RET
+
+// func gfp6Copy(res, a *gfP6)
+TEXT ·gfp6Copy(SB),NOSPLIT,$0
+	MOVD res+0(FP), res_ptr
+	MOVD a+8(FP), a_ptr
+	MOVD $16, R6
+	MOVD $32, R7
+	MOVD $48, R8
+	copyFirst64
+
+	MOVD $0x40, R6
+	MOVD $0x50, R7
+	MOVD $0x60, R8
+	MOVD $0x70, R9
+	copyNext64
+
+	MOVD $0x80, R6
+	MOVD $0x90, R7
+	MOVD $0xa0, R8
+	MOVD $0xb0, R9
+	copyNext64
+	RET
+
+// func gfp12Copy(res, a *gfP12)
+TEXT ·gfp12Copy(SB),NOSPLIT,$0
+	MOVD res+0(FP), res_ptr
+	MOVD a+8(FP), a_ptr
+	MOVD $16, R6
+	MOVD $32, R7
+	MOVD $48, R8
+	copyFirst64
+
+	MOVD $0x40, R6
+	MOVD $0x50, R7
+	MOVD $0x60, R8
+	MOVD $0x70, R9
+	copyNext64
+
+	MOVD $0x80, R6
+	MOVD $0x90, R7
+	MOVD $0xa0, R8
+	MOVD $0xb0, R9
+	copyNext64
+
+	MOVD $0xc0, R6
+	MOVD $0xd0, R7
+	MOVD $0xe0, R8
+	MOVD $0xf0, R9
+	copyNext64
+
+	MOVD $0x0100, R6
+	MOVD $0x0110, R7
+	MOVD $0x0120, R8
+	MOVD $0x0130, R9
+	copyNext64
+
+	MOVD $0x0140, R6
+	MOVD $0x0150, R7
+	MOVD $0x0160, R8
+	MOVD $0x0170, R9
+	copyNext64	
+	RET
+
+#define ZER V10
+#define SEL V11
+
+#define moveFirst64 \
+	LXVD2X (a_ptr)(R0), V0     \
+	LXVD2X (a_ptr)(R6), V1     \
+	LXVD2X (a_ptr)(R7), V2     \
+	LXVD2X (a_ptr)(R8), V3     \
+	LXVD2X (b_ptr)(R0), V4     \
+	LXVD2X (b_ptr)(R6), V5     \
+	LXVD2X (b_ptr)(R7), V6     \
+	LXVD2X (b_ptr)(R8), V7     \
+	VSEL V4, V0, SEL, V0     \
+	VSEL V5, V1, SEL, V1     \
+	VSEL V6, V2, SEL, V2     \
+	VSEL V7, V3, SEL, V3     \
+	STXVD2X V0, (res_ptr)(R0)     \
+	STXVD2X V1, (res_ptr)(R6)     \
+	STXVD2X V2, (res_ptr)(R7)     \
+	STXVD2X V3, (res_ptr)(R8)
+
+#define moveNext64 \
+	LXVD2X (a_ptr)(R6), V0     \
+	LXVD2X (a_ptr)(R7), V1     \
+	LXVD2X (a_ptr)(R8), V2     \
+	LXVD2X (a_ptr)(R9), V3     \
+	LXVD2X (b_ptr)(R6), V4     \
+	LXVD2X (b_ptr)(R7), V5     \
+	LXVD2X (b_ptr)(R8), V6     \
+	LXVD2X (b_ptr)(R9), V7     \
+	VSEL V4, V0, SEL, V0     \
+	VSEL V5, V1, SEL, V1     \
+	VSEL V6, V2, SEL, V2     \
+	VSEL V7, V3, SEL, V3     \	
+	STXVD2X V0, (res_ptr)(R6)     \
+	STXVD2X V1, (res_ptr)(R7)     \
+	STXVD2X V2, (res_ptr)(R8)     \
+	STXVD2X V3, (res_ptr)(R9)     \
+
+// func gfP12MovCond(res, a, b *gfP12, cond int)
+// If cond == 0 res=b, else res=a
+TEXT ·gfP12MovCond(SB),NOSPLIT,$0
+	MOVD	res+0(FP), res_ptr
+	MOVD	a+8(FP), a_ptr
+	MOVD	b+16(FP), b_ptr
+	MOVD $56, R21
+	// cond is R1 + 24 (cond offset) + 32
+	LXVDSX (R1)(R21), SEL
+	VSPLTISB $0, ZER
+	// SEL controls whether to store a or b
+	VCMPEQUD SEL, ZER, SEL
+
+	MOVD $16, R6
+	MOVD $32, R7
+	MOVD $48, R8
+	moveFirst64
+
+	MOVD $0x40, R6
+	MOVD $0x50, R7
+	MOVD $0x60, R8
+	MOVD $0x70, R9
+	moveNext64
+
+	MOVD $0x80, R6
+	MOVD $0x90, R7
+	MOVD $0xa0, R8
+	MOVD $0xb0, R9
+	moveNext64
+
+	MOVD $0xc0, R6
+	MOVD $0xd0, R7
+	MOVD $0xe0, R8
+	MOVD $0xf0, R9
+	moveNext64
+
+	MOVD $0x0100, R6
+	MOVD $0x0110, R7
+	MOVD $0x0120, R8
+	MOVD $0x0130, R9
+	moveNext64
+
+	MOVD $0x0140, R6
+	MOVD $0x0150, R7
+	MOVD $0x0160, R8
+	MOVD $0x0170, R9
+	moveNext64
+	RET
+
+// func curvePointMovCond(res, a, b *curvePoint, cond int)
+// If cond == 0 res=b, else res=a
+TEXT ·curvePointMovCond(SB),NOSPLIT,$0
+	MOVD	res+0(FP), res_ptr
+	MOVD	a+8(FP), a_ptr
+	MOVD	b+16(FP), b_ptr
+	MOVD $56, R21
+	// cond is R1 + 24 (cond offset) + 32
+	LXVDSX (R1)(R21), SEL
+	VSPLTISB $0, ZER
+	// SEL controls whether to store a or b
+	VCMPEQUD SEL, ZER, SEL
+
+	MOVD $16, R6
+	MOVD $32, R7
+	MOVD $48, R8
+	moveFirst64
+
+	MOVD $0x40, R6
+	MOVD $0x50, R7
+	MOVD $0x60, R8
+	MOVD $0x70, R9
+	moveNext64	
+	RET
+
+// func twistPointMovCond(res, a, b *twistPoint, cond int)
+// If cond == 0 res=b, else res=a
+TEXT ·twistPointMovCond(SB),NOSPLIT,$0
+	MOVD	res+0(FP), res_ptr
+	MOVD	a+8(FP), a_ptr
+	MOVD	b+16(FP), b_ptr
+	MOVD $56, R21
+	// cond is R1 + 24 (cond offset) + 32
+	LXVDSX (R1)(R21), SEL
+	VSPLTISB $0, ZER
+	// SEL controls whether to store a or b
+	VCMPEQUD SEL, ZER, SEL
+
+	MOVD $16, R6
+	MOVD $32, R7
+	MOVD $48, R8
+	moveFirst64
+
+	MOVD $0x40, R6
+	MOVD $0x50, R7
+	MOVD $0x60, R8
+	MOVD $0x70, R9
+	moveNext64
+
+	MOVD $0x80, R6
+	MOVD $0x90, R7
+	MOVD $0xa0, R8
+	MOVD $0xb0, R9
+	moveNext64
+
+	MOVD $0xc0, R6
+	MOVD $0xd0, R7
+	MOVD $0xe0, R8
+	MOVD $0xf0, R9
+	moveNext64
+
+	RET