900 lines
20 KiB
C
900 lines
20 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/* visemul.c: Emulation of VIS instructions.
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*
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* Copyright (C) 2006 David S. Miller (davem@davemloft.net)
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*/
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#include <linux/kernel.h>
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#include <linux/errno.h>
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#include <linux/thread_info.h>
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#include <linux/perf_event.h>
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#include <asm/ptrace.h>
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#include <asm/pstate.h>
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#include <asm/fpumacro.h>
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#include <linux/uaccess.h>
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#include <asm/cacheflush.h>
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/* OPF field of various VIS instructions. */
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/* 000111011 - four 16-bit packs */
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#define FPACK16_OPF 0x03b
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/* 000111010 - two 32-bit packs */
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#define FPACK32_OPF 0x03a
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/* 000111101 - four 16-bit packs */
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#define FPACKFIX_OPF 0x03d
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/* 001001101 - four 16-bit expands */
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#define FEXPAND_OPF 0x04d
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/* 001001011 - two 32-bit merges */
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#define FPMERGE_OPF 0x04b
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/* 000110001 - 8-by-16-bit partitioned product */
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#define FMUL8x16_OPF 0x031
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/* 000110011 - 8-by-16-bit upper alpha partitioned product */
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#define FMUL8x16AU_OPF 0x033
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/* 000110101 - 8-by-16-bit lower alpha partitioned product */
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#define FMUL8x16AL_OPF 0x035
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/* 000110110 - upper 8-by-16-bit partitioned product */
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#define FMUL8SUx16_OPF 0x036
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/* 000110111 - lower 8-by-16-bit partitioned product */
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#define FMUL8ULx16_OPF 0x037
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/* 000111000 - upper 8-by-16-bit partitioned product */
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#define FMULD8SUx16_OPF 0x038
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/* 000111001 - lower unsigned 8-by-16-bit partitioned product */
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#define FMULD8ULx16_OPF 0x039
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/* 000101000 - four 16-bit compare; set rd if src1 > src2 */
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#define FCMPGT16_OPF 0x028
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/* 000101100 - two 32-bit compare; set rd if src1 > src2 */
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#define FCMPGT32_OPF 0x02c
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/* 000100000 - four 16-bit compare; set rd if src1 <= src2 */
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#define FCMPLE16_OPF 0x020
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/* 000100100 - two 32-bit compare; set rd if src1 <= src2 */
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#define FCMPLE32_OPF 0x024
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/* 000100010 - four 16-bit compare; set rd if src1 != src2 */
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#define FCMPNE16_OPF 0x022
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/* 000100110 - two 32-bit compare; set rd if src1 != src2 */
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#define FCMPNE32_OPF 0x026
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/* 000101010 - four 16-bit compare; set rd if src1 == src2 */
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#define FCMPEQ16_OPF 0x02a
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/* 000101110 - two 32-bit compare; set rd if src1 == src2 */
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#define FCMPEQ32_OPF 0x02e
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/* 000000000 - Eight 8-bit edge boundary processing */
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#define EDGE8_OPF 0x000
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/* 000000001 - Eight 8-bit edge boundary processing, no CC */
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#define EDGE8N_OPF 0x001
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/* 000000010 - Eight 8-bit edge boundary processing, little-endian */
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#define EDGE8L_OPF 0x002
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/* 000000011 - Eight 8-bit edge boundary processing, little-endian, no CC */
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#define EDGE8LN_OPF 0x003
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/* 000000100 - Four 16-bit edge boundary processing */
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#define EDGE16_OPF 0x004
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/* 000000101 - Four 16-bit edge boundary processing, no CC */
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#define EDGE16N_OPF 0x005
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/* 000000110 - Four 16-bit edge boundary processing, little-endian */
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#define EDGE16L_OPF 0x006
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/* 000000111 - Four 16-bit edge boundary processing, little-endian, no CC */
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#define EDGE16LN_OPF 0x007
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/* 000001000 - Two 32-bit edge boundary processing */
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#define EDGE32_OPF 0x008
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/* 000001001 - Two 32-bit edge boundary processing, no CC */
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#define EDGE32N_OPF 0x009
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/* 000001010 - Two 32-bit edge boundary processing, little-endian */
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#define EDGE32L_OPF 0x00a
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/* 000001011 - Two 32-bit edge boundary processing, little-endian, no CC */
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#define EDGE32LN_OPF 0x00b
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/* 000111110 - distance between 8 8-bit components */
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#define PDIST_OPF 0x03e
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/* 000010000 - convert 8-bit 3-D address to blocked byte address */
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#define ARRAY8_OPF 0x010
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/* 000010010 - convert 16-bit 3-D address to blocked byte address */
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#define ARRAY16_OPF 0x012
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/* 000010100 - convert 32-bit 3-D address to blocked byte address */
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#define ARRAY32_OPF 0x014
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/* 000011001 - Set the GSR.MASK field in preparation for a BSHUFFLE */
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#define BMASK_OPF 0x019
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/* 001001100 - Permute bytes as specified by GSR.MASK */
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#define BSHUFFLE_OPF 0x04c
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#define VIS_OPF_SHIFT 5
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#define VIS_OPF_MASK (0x1ff << VIS_OPF_SHIFT)
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#define RS1(INSN) (((INSN) >> 14) & 0x1f)
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#define RS2(INSN) (((INSN) >> 0) & 0x1f)
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#define RD(INSN) (((INSN) >> 25) & 0x1f)
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static inline void maybe_flush_windows(unsigned int rs1, unsigned int rs2,
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unsigned int rd, int from_kernel)
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{
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if (rs2 >= 16 || rs1 >= 16 || rd >= 16) {
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if (from_kernel != 0)
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__asm__ __volatile__("flushw");
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else
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flushw_user();
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}
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}
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static unsigned long fetch_reg(unsigned int reg, struct pt_regs *regs)
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{
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unsigned long value, fp;
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if (reg < 16)
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return (!reg ? 0 : regs->u_regs[reg]);
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fp = regs->u_regs[UREG_FP];
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if (regs->tstate & TSTATE_PRIV) {
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struct reg_window *win;
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win = (struct reg_window *)(fp + STACK_BIAS);
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value = win->locals[reg - 16];
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} else if (!test_thread_64bit_stack(fp)) {
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struct reg_window32 __user *win32;
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win32 = (struct reg_window32 __user *)((unsigned long)((u32)fp));
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get_user(value, &win32->locals[reg - 16]);
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} else {
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struct reg_window __user *win;
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win = (struct reg_window __user *)(fp + STACK_BIAS);
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get_user(value, &win->locals[reg - 16]);
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}
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return value;
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}
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static inline unsigned long __user *__fetch_reg_addr_user(unsigned int reg,
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struct pt_regs *regs)
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{
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unsigned long fp = regs->u_regs[UREG_FP];
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BUG_ON(reg < 16);
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BUG_ON(regs->tstate & TSTATE_PRIV);
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if (!test_thread_64bit_stack(fp)) {
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struct reg_window32 __user *win32;
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win32 = (struct reg_window32 __user *)((unsigned long)((u32)fp));
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return (unsigned long __user *)&win32->locals[reg - 16];
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} else {
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struct reg_window __user *win;
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win = (struct reg_window __user *)(fp + STACK_BIAS);
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return &win->locals[reg - 16];
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}
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}
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static inline unsigned long *__fetch_reg_addr_kern(unsigned int reg,
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struct pt_regs *regs)
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{
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BUG_ON(reg >= 16);
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BUG_ON(regs->tstate & TSTATE_PRIV);
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return ®s->u_regs[reg];
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}
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static void store_reg(struct pt_regs *regs, unsigned long val, unsigned long rd)
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{
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if (rd < 16) {
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unsigned long *rd_kern = __fetch_reg_addr_kern(rd, regs);
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*rd_kern = val;
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} else {
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unsigned long __user *rd_user = __fetch_reg_addr_user(rd, regs);
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if (!test_thread_64bit_stack(regs->u_regs[UREG_FP]))
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__put_user((u32)val, (u32 __user *)rd_user);
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else
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__put_user(val, rd_user);
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}
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}
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static inline unsigned long fpd_regval(struct fpustate *f,
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unsigned int insn_regnum)
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{
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insn_regnum = (((insn_regnum & 1) << 5) |
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(insn_regnum & 0x1e));
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return *(unsigned long *) &f->regs[insn_regnum];
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}
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static inline unsigned long *fpd_regaddr(struct fpustate *f,
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unsigned int insn_regnum)
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{
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insn_regnum = (((insn_regnum & 1) << 5) |
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(insn_regnum & 0x1e));
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return (unsigned long *) &f->regs[insn_regnum];
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}
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static inline unsigned int fps_regval(struct fpustate *f,
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unsigned int insn_regnum)
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{
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return f->regs[insn_regnum];
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}
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static inline unsigned int *fps_regaddr(struct fpustate *f,
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unsigned int insn_regnum)
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{
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return &f->regs[insn_regnum];
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}
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struct edge_tab {
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u16 left, right;
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};
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static struct edge_tab edge8_tab[8] = {
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{ 0xff, 0x80 },
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{ 0x7f, 0xc0 },
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{ 0x3f, 0xe0 },
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{ 0x1f, 0xf0 },
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{ 0x0f, 0xf8 },
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{ 0x07, 0xfc },
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{ 0x03, 0xfe },
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{ 0x01, 0xff },
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};
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static struct edge_tab edge8_tab_l[8] = {
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{ 0xff, 0x01 },
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{ 0xfe, 0x03 },
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{ 0xfc, 0x07 },
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{ 0xf8, 0x0f },
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{ 0xf0, 0x1f },
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{ 0xe0, 0x3f },
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{ 0xc0, 0x7f },
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{ 0x80, 0xff },
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};
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static struct edge_tab edge16_tab[4] = {
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{ 0xf, 0x8 },
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{ 0x7, 0xc },
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{ 0x3, 0xe },
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{ 0x1, 0xf },
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};
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static struct edge_tab edge16_tab_l[4] = {
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{ 0xf, 0x1 },
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{ 0xe, 0x3 },
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{ 0xc, 0x7 },
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{ 0x8, 0xf },
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};
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static struct edge_tab edge32_tab[2] = {
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{ 0x3, 0x2 },
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{ 0x1, 0x3 },
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};
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static struct edge_tab edge32_tab_l[2] = {
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{ 0x3, 0x1 },
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{ 0x2, 0x3 },
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};
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static void edge(struct pt_regs *regs, unsigned int insn, unsigned int opf)
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{
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unsigned long orig_rs1, rs1, orig_rs2, rs2, rd_val;
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u16 left, right;
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maybe_flush_windows(RS1(insn), RS2(insn), RD(insn), 0);
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orig_rs1 = rs1 = fetch_reg(RS1(insn), regs);
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orig_rs2 = rs2 = fetch_reg(RS2(insn), regs);
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if (test_thread_flag(TIF_32BIT)) {
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rs1 = rs1 & 0xffffffff;
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rs2 = rs2 & 0xffffffff;
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}
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switch (opf) {
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default:
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case EDGE8_OPF:
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case EDGE8N_OPF:
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left = edge8_tab[rs1 & 0x7].left;
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right = edge8_tab[rs2 & 0x7].right;
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break;
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case EDGE8L_OPF:
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case EDGE8LN_OPF:
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left = edge8_tab_l[rs1 & 0x7].left;
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right = edge8_tab_l[rs2 & 0x7].right;
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break;
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case EDGE16_OPF:
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case EDGE16N_OPF:
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left = edge16_tab[(rs1 >> 1) & 0x3].left;
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right = edge16_tab[(rs2 >> 1) & 0x3].right;
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break;
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case EDGE16L_OPF:
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case EDGE16LN_OPF:
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left = edge16_tab_l[(rs1 >> 1) & 0x3].left;
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right = edge16_tab_l[(rs2 >> 1) & 0x3].right;
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break;
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case EDGE32_OPF:
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case EDGE32N_OPF:
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left = edge32_tab[(rs1 >> 2) & 0x1].left;
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right = edge32_tab[(rs2 >> 2) & 0x1].right;
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break;
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case EDGE32L_OPF:
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case EDGE32LN_OPF:
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left = edge32_tab_l[(rs1 >> 2) & 0x1].left;
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right = edge32_tab_l[(rs2 >> 2) & 0x1].right;
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break;
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}
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if ((rs1 & ~0x7UL) == (rs2 & ~0x7UL))
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rd_val = right & left;
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else
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rd_val = left;
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store_reg(regs, rd_val, RD(insn));
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switch (opf) {
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case EDGE8_OPF:
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case EDGE8L_OPF:
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case EDGE16_OPF:
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case EDGE16L_OPF:
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case EDGE32_OPF:
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case EDGE32L_OPF: {
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unsigned long ccr, tstate;
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__asm__ __volatile__("subcc %1, %2, %%g0\n\t"
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"rd %%ccr, %0"
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: "=r" (ccr)
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: "r" (orig_rs1), "r" (orig_rs2)
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: "cc");
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tstate = regs->tstate & ~(TSTATE_XCC | TSTATE_ICC);
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regs->tstate = tstate | (ccr << 32UL);
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}
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}
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}
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static void array(struct pt_regs *regs, unsigned int insn, unsigned int opf)
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{
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unsigned long rs1, rs2, rd_val;
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unsigned int bits, bits_mask;
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maybe_flush_windows(RS1(insn), RS2(insn), RD(insn), 0);
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rs1 = fetch_reg(RS1(insn), regs);
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rs2 = fetch_reg(RS2(insn), regs);
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bits = (rs2 > 5 ? 5 : rs2);
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bits_mask = (1UL << bits) - 1UL;
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rd_val = ((((rs1 >> 11) & 0x3) << 0) |
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(((rs1 >> 33) & 0x3) << 2) |
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(((rs1 >> 55) & 0x1) << 4) |
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(((rs1 >> 13) & 0xf) << 5) |
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(((rs1 >> 35) & 0xf) << 9) |
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(((rs1 >> 56) & 0xf) << 13) |
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(((rs1 >> 17) & bits_mask) << 17) |
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(((rs1 >> 39) & bits_mask) << (17 + bits)) |
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(((rs1 >> 60) & 0xf) << (17 + (2*bits))));
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switch (opf) {
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case ARRAY16_OPF:
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rd_val <<= 1;
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break;
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case ARRAY32_OPF:
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rd_val <<= 2;
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}
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store_reg(regs, rd_val, RD(insn));
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}
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static void bmask(struct pt_regs *regs, unsigned int insn)
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{
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unsigned long rs1, rs2, rd_val, gsr;
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maybe_flush_windows(RS1(insn), RS2(insn), RD(insn), 0);
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rs1 = fetch_reg(RS1(insn), regs);
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rs2 = fetch_reg(RS2(insn), regs);
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rd_val = rs1 + rs2;
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store_reg(regs, rd_val, RD(insn));
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gsr = current_thread_info()->gsr[0] & 0xffffffff;
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gsr |= rd_val << 32UL;
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current_thread_info()->gsr[0] = gsr;
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}
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static void bshuffle(struct pt_regs *regs, unsigned int insn)
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{
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struct fpustate *f = FPUSTATE;
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unsigned long rs1, rs2, rd_val;
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unsigned long bmask, i;
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bmask = current_thread_info()->gsr[0] >> 32UL;
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rs1 = fpd_regval(f, RS1(insn));
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rs2 = fpd_regval(f, RS2(insn));
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rd_val = 0UL;
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for (i = 0; i < 8; i++) {
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unsigned long which = (bmask >> (i * 4)) & 0xf;
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unsigned long byte;
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if (which < 8)
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byte = (rs1 >> (which * 8)) & 0xff;
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else
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byte = (rs2 >> ((which-8)*8)) & 0xff;
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rd_val |= (byte << (i * 8));
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}
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*fpd_regaddr(f, RD(insn)) = rd_val;
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}
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static void pdist(struct pt_regs *regs, unsigned int insn)
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{
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struct fpustate *f = FPUSTATE;
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unsigned long rs1, rs2, *rd, rd_val;
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unsigned long i;
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rs1 = fpd_regval(f, RS1(insn));
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rs2 = fpd_regval(f, RS2(insn));
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rd = fpd_regaddr(f, RD(insn));
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rd_val = *rd;
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for (i = 0; i < 8; i++) {
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s16 s1, s2;
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s1 = (rs1 >> (56 - (i * 8))) & 0xff;
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s2 = (rs2 >> (56 - (i * 8))) & 0xff;
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/* Absolute value of difference. */
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s1 -= s2;
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if (s1 < 0)
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s1 = ~s1 + 1;
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rd_val += s1;
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}
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*rd = rd_val;
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}
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static void pformat(struct pt_regs *regs, unsigned int insn, unsigned int opf)
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{
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struct fpustate *f = FPUSTATE;
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unsigned long rs1, rs2, gsr, scale, rd_val;
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gsr = current_thread_info()->gsr[0];
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scale = (gsr >> 3) & (opf == FPACK16_OPF ? 0xf : 0x1f);
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switch (opf) {
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case FPACK16_OPF: {
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unsigned long byte;
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rs2 = fpd_regval(f, RS2(insn));
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rd_val = 0;
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for (byte = 0; byte < 4; byte++) {
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unsigned int val;
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s16 src = (rs2 >> (byte * 16UL)) & 0xffffUL;
|
|
int scaled = src << scale;
|
|
int from_fixed = scaled >> 7;
|
|
|
|
val = ((from_fixed < 0) ?
|
|
0 :
|
|
(from_fixed > 255) ?
|
|
255 : from_fixed);
|
|
|
|
rd_val |= (val << (8 * byte));
|
|
}
|
|
*fps_regaddr(f, RD(insn)) = rd_val;
|
|
break;
|
|
}
|
|
|
|
case FPACK32_OPF: {
|
|
unsigned long word;
|
|
|
|
rs1 = fpd_regval(f, RS1(insn));
|
|
rs2 = fpd_regval(f, RS2(insn));
|
|
rd_val = (rs1 << 8) & ~(0x000000ff000000ffUL);
|
|
for (word = 0; word < 2; word++) {
|
|
unsigned long val;
|
|
s32 src = (rs2 >> (word * 32UL));
|
|
s64 scaled = src << scale;
|
|
s64 from_fixed = scaled >> 23;
|
|
|
|
val = ((from_fixed < 0) ?
|
|
0 :
|
|
(from_fixed > 255) ?
|
|
255 : from_fixed);
|
|
|
|
rd_val |= (val << (32 * word));
|
|
}
|
|
*fpd_regaddr(f, RD(insn)) = rd_val;
|
|
break;
|
|
}
|
|
|
|
case FPACKFIX_OPF: {
|
|
unsigned long word;
|
|
|
|
rs2 = fpd_regval(f, RS2(insn));
|
|
|
|
rd_val = 0;
|
|
for (word = 0; word < 2; word++) {
|
|
long val;
|
|
s32 src = (rs2 >> (word * 32UL));
|
|
s64 scaled = src << scale;
|
|
s64 from_fixed = scaled >> 16;
|
|
|
|
val = ((from_fixed < -32768) ?
|
|
-32768 :
|
|
(from_fixed > 32767) ?
|
|
32767 : from_fixed);
|
|
|
|
rd_val |= ((val & 0xffff) << (word * 16));
|
|
}
|
|
*fps_regaddr(f, RD(insn)) = rd_val;
|
|
break;
|
|
}
|
|
|
|
case FEXPAND_OPF: {
|
|
unsigned long byte;
|
|
|
|
rs2 = fps_regval(f, RS2(insn));
|
|
|
|
rd_val = 0;
|
|
for (byte = 0; byte < 4; byte++) {
|
|
unsigned long val;
|
|
u8 src = (rs2 >> (byte * 8)) & 0xff;
|
|
|
|
val = src << 4;
|
|
|
|
rd_val |= (val << (byte * 16));
|
|
}
|
|
*fpd_regaddr(f, RD(insn)) = rd_val;
|
|
break;
|
|
}
|
|
|
|
case FPMERGE_OPF: {
|
|
rs1 = fps_regval(f, RS1(insn));
|
|
rs2 = fps_regval(f, RS2(insn));
|
|
|
|
rd_val = (((rs2 & 0x000000ff) << 0) |
|
|
((rs1 & 0x000000ff) << 8) |
|
|
((rs2 & 0x0000ff00) << 8) |
|
|
((rs1 & 0x0000ff00) << 16) |
|
|
((rs2 & 0x00ff0000) << 16) |
|
|
((rs1 & 0x00ff0000) << 24) |
|
|
((rs2 & 0xff000000) << 24) |
|
|
((rs1 & 0xff000000) << 32));
|
|
*fpd_regaddr(f, RD(insn)) = rd_val;
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
static void pmul(struct pt_regs *regs, unsigned int insn, unsigned int opf)
|
|
{
|
|
struct fpustate *f = FPUSTATE;
|
|
unsigned long rs1, rs2, rd_val;
|
|
|
|
switch (opf) {
|
|
case FMUL8x16_OPF: {
|
|
unsigned long byte;
|
|
|
|
rs1 = fps_regval(f, RS1(insn));
|
|
rs2 = fpd_regval(f, RS2(insn));
|
|
|
|
rd_val = 0;
|
|
for (byte = 0; byte < 4; byte++) {
|
|
u16 src1 = (rs1 >> (byte * 8)) & 0x00ff;
|
|
s16 src2 = (rs2 >> (byte * 16)) & 0xffff;
|
|
u32 prod = src1 * src2;
|
|
u16 scaled = ((prod & 0x00ffff00) >> 8);
|
|
|
|
/* Round up. */
|
|
if (prod & 0x80)
|
|
scaled++;
|
|
rd_val |= ((scaled & 0xffffUL) << (byte * 16UL));
|
|
}
|
|
|
|
*fpd_regaddr(f, RD(insn)) = rd_val;
|
|
break;
|
|
}
|
|
|
|
case FMUL8x16AU_OPF:
|
|
case FMUL8x16AL_OPF: {
|
|
unsigned long byte;
|
|
s16 src2;
|
|
|
|
rs1 = fps_regval(f, RS1(insn));
|
|
rs2 = fps_regval(f, RS2(insn));
|
|
|
|
rd_val = 0;
|
|
src2 = rs2 >> (opf == FMUL8x16AU_OPF ? 16 : 0);
|
|
for (byte = 0; byte < 4; byte++) {
|
|
u16 src1 = (rs1 >> (byte * 8)) & 0x00ff;
|
|
u32 prod = src1 * src2;
|
|
u16 scaled = ((prod & 0x00ffff00) >> 8);
|
|
|
|
/* Round up. */
|
|
if (prod & 0x80)
|
|
scaled++;
|
|
rd_val |= ((scaled & 0xffffUL) << (byte * 16UL));
|
|
}
|
|
|
|
*fpd_regaddr(f, RD(insn)) = rd_val;
|
|
break;
|
|
}
|
|
|
|
case FMUL8SUx16_OPF:
|
|
case FMUL8ULx16_OPF: {
|
|
unsigned long byte, ushift;
|
|
|
|
rs1 = fpd_regval(f, RS1(insn));
|
|
rs2 = fpd_regval(f, RS2(insn));
|
|
|
|
rd_val = 0;
|
|
ushift = (opf == FMUL8SUx16_OPF) ? 8 : 0;
|
|
for (byte = 0; byte < 4; byte++) {
|
|
u16 src1;
|
|
s16 src2;
|
|
u32 prod;
|
|
u16 scaled;
|
|
|
|
src1 = ((rs1 >> ((16 * byte) + ushift)) & 0x00ff);
|
|
src2 = ((rs2 >> (16 * byte)) & 0xffff);
|
|
prod = src1 * src2;
|
|
scaled = ((prod & 0x00ffff00) >> 8);
|
|
|
|
/* Round up. */
|
|
if (prod & 0x80)
|
|
scaled++;
|
|
rd_val |= ((scaled & 0xffffUL) << (byte * 16UL));
|
|
}
|
|
|
|
*fpd_regaddr(f, RD(insn)) = rd_val;
|
|
break;
|
|
}
|
|
|
|
case FMULD8SUx16_OPF:
|
|
case FMULD8ULx16_OPF: {
|
|
unsigned long byte, ushift;
|
|
|
|
rs1 = fps_regval(f, RS1(insn));
|
|
rs2 = fps_regval(f, RS2(insn));
|
|
|
|
rd_val = 0;
|
|
ushift = (opf == FMULD8SUx16_OPF) ? 8 : 0;
|
|
for (byte = 0; byte < 2; byte++) {
|
|
u16 src1;
|
|
s16 src2;
|
|
u32 prod;
|
|
u16 scaled;
|
|
|
|
src1 = ((rs1 >> ((16 * byte) + ushift)) & 0x00ff);
|
|
src2 = ((rs2 >> (16 * byte)) & 0xffff);
|
|
prod = src1 * src2;
|
|
scaled = ((prod & 0x00ffff00) >> 8);
|
|
|
|
/* Round up. */
|
|
if (prod & 0x80)
|
|
scaled++;
|
|
rd_val |= ((scaled & 0xffffUL) <<
|
|
((byte * 32UL) + 7UL));
|
|
}
|
|
*fpd_regaddr(f, RD(insn)) = rd_val;
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
static void pcmp(struct pt_regs *regs, unsigned int insn, unsigned int opf)
|
|
{
|
|
struct fpustate *f = FPUSTATE;
|
|
unsigned long rs1, rs2, rd_val, i;
|
|
|
|
rs1 = fpd_regval(f, RS1(insn));
|
|
rs2 = fpd_regval(f, RS2(insn));
|
|
|
|
rd_val = 0;
|
|
|
|
switch (opf) {
|
|
case FCMPGT16_OPF:
|
|
for (i = 0; i < 4; i++) {
|
|
s16 a = (rs1 >> (i * 16)) & 0xffff;
|
|
s16 b = (rs2 >> (i * 16)) & 0xffff;
|
|
|
|
if (a > b)
|
|
rd_val |= 8 >> i;
|
|
}
|
|
break;
|
|
|
|
case FCMPGT32_OPF:
|
|
for (i = 0; i < 2; i++) {
|
|
s32 a = (rs1 >> (i * 32)) & 0xffffffff;
|
|
s32 b = (rs2 >> (i * 32)) & 0xffffffff;
|
|
|
|
if (a > b)
|
|
rd_val |= 2 >> i;
|
|
}
|
|
break;
|
|
|
|
case FCMPLE16_OPF:
|
|
for (i = 0; i < 4; i++) {
|
|
s16 a = (rs1 >> (i * 16)) & 0xffff;
|
|
s16 b = (rs2 >> (i * 16)) & 0xffff;
|
|
|
|
if (a <= b)
|
|
rd_val |= 8 >> i;
|
|
}
|
|
break;
|
|
|
|
case FCMPLE32_OPF:
|
|
for (i = 0; i < 2; i++) {
|
|
s32 a = (rs1 >> (i * 32)) & 0xffffffff;
|
|
s32 b = (rs2 >> (i * 32)) & 0xffffffff;
|
|
|
|
if (a <= b)
|
|
rd_val |= 2 >> i;
|
|
}
|
|
break;
|
|
|
|
case FCMPNE16_OPF:
|
|
for (i = 0; i < 4; i++) {
|
|
s16 a = (rs1 >> (i * 16)) & 0xffff;
|
|
s16 b = (rs2 >> (i * 16)) & 0xffff;
|
|
|
|
if (a != b)
|
|
rd_val |= 8 >> i;
|
|
}
|
|
break;
|
|
|
|
case FCMPNE32_OPF:
|
|
for (i = 0; i < 2; i++) {
|
|
s32 a = (rs1 >> (i * 32)) & 0xffffffff;
|
|
s32 b = (rs2 >> (i * 32)) & 0xffffffff;
|
|
|
|
if (a != b)
|
|
rd_val |= 2 >> i;
|
|
}
|
|
break;
|
|
|
|
case FCMPEQ16_OPF:
|
|
for (i = 0; i < 4; i++) {
|
|
s16 a = (rs1 >> (i * 16)) & 0xffff;
|
|
s16 b = (rs2 >> (i * 16)) & 0xffff;
|
|
|
|
if (a == b)
|
|
rd_val |= 8 >> i;
|
|
}
|
|
break;
|
|
|
|
case FCMPEQ32_OPF:
|
|
for (i = 0; i < 2; i++) {
|
|
s32 a = (rs1 >> (i * 32)) & 0xffffffff;
|
|
s32 b = (rs2 >> (i * 32)) & 0xffffffff;
|
|
|
|
if (a == b)
|
|
rd_val |= 2 >> i;
|
|
}
|
|
break;
|
|
}
|
|
|
|
maybe_flush_windows(0, 0, RD(insn), 0);
|
|
store_reg(regs, rd_val, RD(insn));
|
|
}
|
|
|
|
/* Emulate the VIS instructions which are not implemented in
|
|
* hardware on Niagara.
|
|
*/
|
|
int vis_emul(struct pt_regs *regs, unsigned int insn)
|
|
{
|
|
unsigned long pc = regs->tpc;
|
|
unsigned int opf;
|
|
|
|
BUG_ON(regs->tstate & TSTATE_PRIV);
|
|
|
|
perf_sw_event(PERF_COUNT_SW_EMULATION_FAULTS, 1, regs, 0);
|
|
|
|
if (test_thread_flag(TIF_32BIT))
|
|
pc = (u32)pc;
|
|
|
|
if (get_user(insn, (u32 __user *) pc))
|
|
return -EFAULT;
|
|
|
|
save_and_clear_fpu();
|
|
|
|
opf = (insn & VIS_OPF_MASK) >> VIS_OPF_SHIFT;
|
|
switch (opf) {
|
|
default:
|
|
return -EINVAL;
|
|
|
|
/* Pixel Formatting Instructions. */
|
|
case FPACK16_OPF:
|
|
case FPACK32_OPF:
|
|
case FPACKFIX_OPF:
|
|
case FEXPAND_OPF:
|
|
case FPMERGE_OPF:
|
|
pformat(regs, insn, opf);
|
|
break;
|
|
|
|
/* Partitioned Multiply Instructions */
|
|
case FMUL8x16_OPF:
|
|
case FMUL8x16AU_OPF:
|
|
case FMUL8x16AL_OPF:
|
|
case FMUL8SUx16_OPF:
|
|
case FMUL8ULx16_OPF:
|
|
case FMULD8SUx16_OPF:
|
|
case FMULD8ULx16_OPF:
|
|
pmul(regs, insn, opf);
|
|
break;
|
|
|
|
/* Pixel Compare Instructions */
|
|
case FCMPGT16_OPF:
|
|
case FCMPGT32_OPF:
|
|
case FCMPLE16_OPF:
|
|
case FCMPLE32_OPF:
|
|
case FCMPNE16_OPF:
|
|
case FCMPNE32_OPF:
|
|
case FCMPEQ16_OPF:
|
|
case FCMPEQ32_OPF:
|
|
pcmp(regs, insn, opf);
|
|
break;
|
|
|
|
/* Edge Handling Instructions */
|
|
case EDGE8_OPF:
|
|
case EDGE8N_OPF:
|
|
case EDGE8L_OPF:
|
|
case EDGE8LN_OPF:
|
|
case EDGE16_OPF:
|
|
case EDGE16N_OPF:
|
|
case EDGE16L_OPF:
|
|
case EDGE16LN_OPF:
|
|
case EDGE32_OPF:
|
|
case EDGE32N_OPF:
|
|
case EDGE32L_OPF:
|
|
case EDGE32LN_OPF:
|
|
edge(regs, insn, opf);
|
|
break;
|
|
|
|
/* Pixel Component Distance */
|
|
case PDIST_OPF:
|
|
pdist(regs, insn);
|
|
break;
|
|
|
|
/* Three-Dimensional Array Addressing Instructions */
|
|
case ARRAY8_OPF:
|
|
case ARRAY16_OPF:
|
|
case ARRAY32_OPF:
|
|
array(regs, insn, opf);
|
|
break;
|
|
|
|
/* Byte Mask and Shuffle Instructions */
|
|
case BMASK_OPF:
|
|
bmask(regs, insn);
|
|
break;
|
|
|
|
case BSHUFFLE_OPF:
|
|
bshuffle(regs, insn);
|
|
break;
|
|
}
|
|
|
|
regs->tpc = regs->tnpc;
|
|
regs->tnpc += 4;
|
|
return 0;
|
|
}
|