add new system file

hc

2024-02-20 102a0743326a03cd1a1202ceda21e175b7d3575c

 kernel/arch/powerpc/kernel/vecemu.c
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@@ -10,6 +10,7 @@
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 #include <asm/processor.h>
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 #include <asm/switch_to.h>
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 #include <linux/uaccess.h>
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+#include <asm/inst.h>
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 /* Functions in vector.S */
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 extern void vaddfp(vector128 *dst, vector128 *a, vector128 *b);
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@@ -260,21 +261,24 @@
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 int emulate_altivec(struct pt_regs *regs)
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 {
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-	unsigned int instr, i;
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+	struct ppc_inst instr;
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+	unsigned int i, word;
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 	unsigned int va, vb, vc, vd;
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 	vector128 *vrs;
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-	if (get_user(instr, (unsigned int __user *) regs->nip))
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+	if (get_user_instr(instr, (void __user *)regs->nip))
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 		return -EFAULT;
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-	if ((instr >> 26) != 4)
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+
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+	word = ppc_inst_val(instr);
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+	if (ppc_inst_primary_opcode(instr) != 4)
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 		return -EINVAL;		/* not an altivec instruction */
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-	vd = (instr >> 21) & 0x1f;
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-	va = (instr >> 16) & 0x1f;
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-	vb = (instr >> 11) & 0x1f;
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-	vc = (instr >> 6) & 0x1f;
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+	vd = (word >> 21) & 0x1f;
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+	va = (word >> 16) & 0x1f;
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+	vb = (word >> 11) & 0x1f;
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+	vc = (word >> 6) & 0x1f;
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 	vrs = current->thread.vr_state.vr;
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-	switch (instr & 0x3f) {
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+	switch (word & 0x3f) {
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 	case 10:
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 		switch (vc) {
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 		case 0:	/* vaddfp */