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sh: math-emu: drop unused functions
[ Upstream commite25c252a9b
] Delete ieee_fpe_handler() since it is not used. After that is done, delete denormal_to_double() since it is not used: .../arch/sh/math-emu/math.c:505:12: error: 'ieee_fpe_handler' defined but not used [-Werror=unused-function] 505 | static int ieee_fpe_handler(struct pt_regs *regs) .../arch/sh/math-emu/math.c:477:13: error: 'denormal_to_double' defined but not used [-Werror=unused-function] 477 | static void denormal_to_double(struct sh_fpu_soft_struct *fpu, int n) Fixes:7caf62de25
("sh: remove unused do_fpu_error") Signed-off-by: Randy Dunlap <rdunlap@infradead.org> Cc: Takashi YOSHII <takasi-y@ops.dti.ne.jp> Cc: Yoshinori Sato <ysato@users.sourceforge.jp> Cc: John Paul Adrian Glaubitz <glaubitz@physik.fu-berlin.de> Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be> Signed-off-by: Rich Felker <dalias@libc.org> Signed-off-by: Sasha Levin <sashal@kernel.org>
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1 changed files with 0 additions and 103 deletions
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@ -467,109 +467,6 @@ static int fpu_emulate(u16 code, struct sh_fpu_soft_struct *fregs, struct pt_reg
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return id_sys(fregs, regs, code);
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return id_sys(fregs, regs, code);
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}
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}
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/**
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* denormal_to_double - Given denormalized float number,
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* store double float
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*
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* @fpu: Pointer to sh_fpu_soft structure
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* @n: Index to FP register
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*/
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static void denormal_to_double(struct sh_fpu_soft_struct *fpu, int n)
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{
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unsigned long du, dl;
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unsigned long x = fpu->fpul;
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int exp = 1023 - 126;
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if (x != 0 && (x & 0x7f800000) == 0) {
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du = (x & 0x80000000);
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while ((x & 0x00800000) == 0) {
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x <<= 1;
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exp--;
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}
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x &= 0x007fffff;
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du |= (exp << 20) | (x >> 3);
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dl = x << 29;
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fpu->fp_regs[n] = du;
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fpu->fp_regs[n+1] = dl;
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}
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}
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/**
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* ieee_fpe_handler - Handle denormalized number exception
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*
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* @regs: Pointer to register structure
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*
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* Returns 1 when it's handled (should not cause exception).
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*/
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static int ieee_fpe_handler(struct pt_regs *regs)
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{
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unsigned short insn = *(unsigned short *)regs->pc;
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unsigned short finsn;
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unsigned long nextpc;
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int nib[4] = {
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(insn >> 12) & 0xf,
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(insn >> 8) & 0xf,
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(insn >> 4) & 0xf,
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insn & 0xf};
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if (nib[0] == 0xb ||
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(nib[0] == 0x4 && nib[2] == 0x0 && nib[3] == 0xb)) /* bsr & jsr */
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regs->pr = regs->pc + 4;
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if (nib[0] == 0xa || nib[0] == 0xb) { /* bra & bsr */
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nextpc = regs->pc + 4 + ((short) ((insn & 0xfff) << 4) >> 3);
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finsn = *(unsigned short *) (regs->pc + 2);
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} else if (nib[0] == 0x8 && nib[1] == 0xd) { /* bt/s */
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if (regs->sr & 1)
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nextpc = regs->pc + 4 + ((char) (insn & 0xff) << 1);
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else
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nextpc = regs->pc + 4;
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finsn = *(unsigned short *) (regs->pc + 2);
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} else if (nib[0] == 0x8 && nib[1] == 0xf) { /* bf/s */
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if (regs->sr & 1)
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nextpc = regs->pc + 4;
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else
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nextpc = regs->pc + 4 + ((char) (insn & 0xff) << 1);
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finsn = *(unsigned short *) (regs->pc + 2);
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} else if (nib[0] == 0x4 && nib[3] == 0xb &&
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(nib[2] == 0x0 || nib[2] == 0x2)) { /* jmp & jsr */
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nextpc = regs->regs[nib[1]];
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finsn = *(unsigned short *) (regs->pc + 2);
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} else if (nib[0] == 0x0 && nib[3] == 0x3 &&
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(nib[2] == 0x0 || nib[2] == 0x2)) { /* braf & bsrf */
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nextpc = regs->pc + 4 + regs->regs[nib[1]];
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finsn = *(unsigned short *) (regs->pc + 2);
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} else if (insn == 0x000b) { /* rts */
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nextpc = regs->pr;
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finsn = *(unsigned short *) (regs->pc + 2);
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} else {
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nextpc = regs->pc + 2;
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finsn = insn;
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}
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if ((finsn & 0xf1ff) == 0xf0ad) { /* fcnvsd */
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struct task_struct *tsk = current;
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if ((tsk->thread.xstate->softfpu.fpscr & (1 << 17))) {
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/* FPU error */
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denormal_to_double (&tsk->thread.xstate->softfpu,
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(finsn >> 8) & 0xf);
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tsk->thread.xstate->softfpu.fpscr &=
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~(FPSCR_CAUSE_MASK | FPSCR_FLAG_MASK);
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task_thread_info(tsk)->status |= TS_USEDFPU;
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} else {
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force_sig_fault(SIGFPE, FPE_FLTINV,
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(void __user *)regs->pc);
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}
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regs->pc = nextpc;
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return 1;
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}
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return 0;
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}
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/**
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/**
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* fpu_init - Initialize FPU registers
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* fpu_init - Initialize FPU registers
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* @fpu: Pointer to software emulated FPU registers.
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* @fpu: Pointer to software emulated FPU registers.
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