sh: math-emu: drop unused functions

[ Upstream commit e25c252a9b033523c626f039d4b9a304f12f6775 ]

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: 7caf62de25554da3 ("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>

diff --git a/arch/sh/math-emu/math.c b/arch/sh/math-emu/math.c
index e8be0eca0444a05da6e80e9f683695fa0429b378..615ba932c398e4547cb9657cf68bacd8b0b3bce6 100644 (file)
--- a/arch/sh/math-emu/math.c
+++ b/arch/sh/math-emu/math.c
@@ -467,109 +467,6 @@ static int fpu_emulate(u16 code, struct sh_fpu_soft_struct *fregs, struct pt_reg
                return id_sys(fregs, regs, code);
 }
 
-/**
- *     denormal_to_double - Given denormalized float number,
- *                          store double float
- *
- *     @fpu: Pointer to sh_fpu_soft structure
- *     @n: Index to FP register
- */
-static void denormal_to_double(struct sh_fpu_soft_struct *fpu, int n)
-{
-       unsigned long du, dl;
-       unsigned long x = fpu->fpul;
-       int exp = 1023 - 126;
-
-       if (x != 0 && (x & 0x7f800000) == 0) {
-               du = (x & 0x80000000);
-               while ((x & 0x00800000) == 0) {
-                       x <<= 1;
-                       exp--;
-               }
-               x &= 0x007fffff;
-               du |= (exp << 20) | (x >> 3);
-               dl = x << 29;
-
-               fpu->fp_regs[n] = du;
-               fpu->fp_regs[n+1] = dl;
-       }
-}
-
-/**
- *     ieee_fpe_handler - Handle denormalized number exception
- *
- *     @regs: Pointer to register structure
- *
- *     Returns 1 when it's handled (should not cause exception).
- */
-static int ieee_fpe_handler(struct pt_regs *regs)
-{
-       unsigned short insn = *(unsigned short *)regs->pc;
-       unsigned short finsn;
-       unsigned long nextpc;
-       int nib[4] = {
-               (insn >> 12) & 0xf,
-               (insn >> 8) & 0xf,
-               (insn >> 4) & 0xf,
-               insn & 0xf};
-
-       if (nib[0] == 0xb ||
-           (nib[0] == 0x4 && nib[2] == 0x0 && nib[3] == 0xb)) /* bsr & jsr */
-               regs->pr = regs->pc + 4;
-
-       if (nib[0] == 0xa || nib[0] == 0xb) { /* bra & bsr */
-               nextpc = regs->pc + 4 + ((short) ((insn & 0xfff) << 4) >> 3);
-               finsn = *(unsigned short *) (regs->pc + 2);
-       } else if (nib[0] == 0x8 && nib[1] == 0xd) { /* bt/s */
-               if (regs->sr & 1)
-                       nextpc = regs->pc + 4 + ((char) (insn & 0xff) << 1);
-               else
-                       nextpc = regs->pc + 4;
-               finsn = *(unsigned short *) (regs->pc + 2);
-       } else if (nib[0] == 0x8 && nib[1] == 0xf) { /* bf/s */
-               if (regs->sr & 1)
-                       nextpc = regs->pc + 4;
-               else
-                       nextpc = regs->pc + 4 + ((char) (insn & 0xff) << 1);
-               finsn = *(unsigned short *) (regs->pc + 2);
-       } else if (nib[0] == 0x4 && nib[3] == 0xb &&
-                (nib[2] == 0x0 || nib[2] == 0x2)) { /* jmp & jsr */
-               nextpc = regs->regs[nib[1]];
-               finsn = *(unsigned short *) (regs->pc + 2);
-       } else if (nib[0] == 0x0 && nib[3] == 0x3 &&
-                (nib[2] == 0x0 || nib[2] == 0x2)) { /* braf & bsrf */
-               nextpc = regs->pc + 4 + regs->regs[nib[1]];
-               finsn = *(unsigned short *) (regs->pc + 2);
-       } else if (insn == 0x000b) { /* rts */
-               nextpc = regs->pr;
-               finsn = *(unsigned short *) (regs->pc + 2);
-       } else {
-               nextpc = regs->pc + 2;
-               finsn = insn;
-       }
-
-       if ((finsn & 0xf1ff) == 0xf0ad) { /* fcnvsd */
-               struct task_struct *tsk = current;
-
-               if ((tsk->thread.xstate->softfpu.fpscr & (1 << 17))) {
-                       /* FPU error */
-                       denormal_to_double (&tsk->thread.xstate->softfpu,
-                                           (finsn >> 8) & 0xf);
-                       tsk->thread.xstate->softfpu.fpscr &=
-                               ~(FPSCR_CAUSE_MASK | FPSCR_FLAG_MASK);
-                       task_thread_info(tsk)->status |= TS_USEDFPU;
-               } else {
-                       force_sig_fault(SIGFPE, FPE_FLTINV,
-                                       (void __user *)regs->pc);
-               }
-
-               regs->pc = nextpc;
-               return 1;
-       }
-
-       return 0;
-}
-
 /**
  * fpu_init - Initialize FPU registers
  * @fpu: Pointer to software emulated FPU registers.