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diff --git a/qemu/roms/u-boot/post/lib_powerpc/threex.c b/qemu/roms/u-boot/post/lib_powerpc/threex.c
new file mode 100644
index 000000000..ce1edf89d
--- /dev/null
+++ b/qemu/roms/u-boot/post/lib_powerpc/threex.c
@@ -0,0 +1,209 @@
+/*
+ * (C) Copyright 2002
+ * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+
+#include <common.h>
+
+/*
+ * CPU test
+ * Ternary instructions		instr rA,rS,rB
+ *
+ * Logic instructions:		or, orc, xor, nand, nor, eqv
+ * Shift instructions:		slw, srw, sraw
+ *
+ * The test contains a pre-built table of instructions, operands and
+ * expected results. For each table entry, the test will cyclically use
+ * different sets of operand registers and result registers.
+ */
+
+#include <post.h>
+#include "cpu_asm.h"
+
+#if CONFIG_POST & CONFIG_SYS_POST_CPU
+
+extern void cpu_post_exec_22 (ulong *code, ulong *cr, ulong *res, ulong op1,
+    ulong op2);
+extern ulong cpu_post_makecr (long v);
+
+static struct cpu_post_threex_s
+{
+    ulong cmd;
+    ulong op1;
+    ulong op2;
+    ulong res;
+} cpu_post_threex_table[] =
+{
+    {
+	OP_OR,
+	0x1234,
+	0x5678,
+	0x1234 | 0x5678
+    },
+    {
+	OP_ORC,
+	0x1234,
+	0x5678,
+	0x1234 | ~0x5678
+    },
+    {
+	OP_XOR,
+	0x1234,
+	0x5678,
+	0x1234 ^ 0x5678
+    },
+    {
+	OP_NAND,
+	0x1234,
+	0x5678,
+	~(0x1234 & 0x5678)
+    },
+    {
+	OP_NOR,
+	0x1234,
+	0x5678,
+	~(0x1234 | 0x5678)
+    },
+    {
+	OP_EQV,
+	0x1234,
+	0x5678,
+	~(0x1234 ^ 0x5678)
+    },
+    {
+	OP_SLW,
+	0x80,
+	16,
+	0x800000
+    },
+    {
+	OP_SLW,
+	0x80,
+	32,
+	0
+    },
+    {
+	OP_SRW,
+	0x800000,
+	16,
+	0x80
+    },
+    {
+	OP_SRW,
+	0x800000,
+	32,
+	0
+    },
+    {
+	OP_SRAW,
+	0x80000000,
+	3,
+	0xf0000000
+    },
+    {
+	OP_SRAW,
+	0x8000,
+	3,
+	0x1000
+    },
+};
+static unsigned int cpu_post_threex_size = ARRAY_SIZE(cpu_post_threex_table);
+
+int cpu_post_test_threex (void)
+{
+    int ret = 0;
+    unsigned int i, reg;
+    int flag = disable_interrupts();
+
+    for (i = 0; i < cpu_post_threex_size && ret == 0; i++)
+    {
+	struct cpu_post_threex_s *test = cpu_post_threex_table + i;
+
+	for (reg = 0; reg < 32 && ret == 0; reg++)
+	{
+	    unsigned int reg0 = (reg + 0) % 32;
+	    unsigned int reg1 = (reg + 1) % 32;
+	    unsigned int reg2 = (reg + 2) % 32;
+	    unsigned int stk = reg < 16 ? 31 : 15;
+	    unsigned long code[] =
+	    {
+		ASM_STW(stk, 1, -4),
+		ASM_ADDI(stk, 1, -24),
+		ASM_STW(3, stk, 12),
+		ASM_STW(4, stk, 16),
+		ASM_STW(reg0, stk, 8),
+		ASM_STW(reg1, stk, 4),
+		ASM_STW(reg2, stk, 0),
+		ASM_LWZ(reg1, stk, 12),
+		ASM_LWZ(reg0, stk, 16),
+		ASM_12X(test->cmd, reg2, reg1, reg0),
+		ASM_STW(reg2, stk, 12),
+		ASM_LWZ(reg2, stk, 0),
+		ASM_LWZ(reg1, stk, 4),
+		ASM_LWZ(reg0, stk, 8),
+		ASM_LWZ(3, stk, 12),
+		ASM_ADDI(1, stk, 24),
+		ASM_LWZ(stk, 1, -4),
+		ASM_BLR,
+	    };
+	    unsigned long codecr[] =
+	    {
+		ASM_STW(stk, 1, -4),
+		ASM_ADDI(stk, 1, -24),
+		ASM_STW(3, stk, 12),
+		ASM_STW(4, stk, 16),
+		ASM_STW(reg0, stk, 8),
+		ASM_STW(reg1, stk, 4),
+		ASM_STW(reg2, stk, 0),
+		ASM_LWZ(reg1, stk, 12),
+		ASM_LWZ(reg0, stk, 16),
+		ASM_12X(test->cmd, reg2, reg1, reg0) | BIT_C,
+		ASM_STW(reg2, stk, 12),
+		ASM_LWZ(reg2, stk, 0),
+		ASM_LWZ(reg1, stk, 4),
+		ASM_LWZ(reg0, stk, 8),
+		ASM_LWZ(3, stk, 12),
+		ASM_ADDI(1, stk, 24),
+		ASM_LWZ(stk, 1, -4),
+		ASM_BLR,
+	    };
+	    ulong res;
+	    ulong cr;
+
+	    if (ret == 0)
+	    {
+		cr = 0;
+		cpu_post_exec_22 (code, & cr, & res, test->op1, test->op2);
+
+		ret = res == test->res && cr == 0 ? 0 : -1;
+
+		if (ret != 0)
+		{
+		    post_log ("Error at threex test %d !\n", i);
+		}
+	    }
+
+	    if (ret == 0)
+	    {
+		cpu_post_exec_22 (codecr, & cr, & res, test->op1, test->op2);
+
+		ret = res == test->res &&
+		      (cr & 0xe0000000) == cpu_post_makecr (res) ? 0 : -1;
+
+		if (ret != 0)
+		{
+		    post_log ("Error at threex test %d !\n", i);
+		}
+	    }
+	}
+    }
+
+    if (flag)
+	enable_interrupts();
+
+    return ret;
+}
+
+#endif