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Date: Mon, 4 Oct 2021 17:19:12 -0700
From: Randy Dunlap <rdunlap@...radead.org>
To: linux-kernel@...r.kernel.org
Cc: Randy Dunlap <rdunlap@...radead.org>,
Yoshinori Sato <ysato@...rs.sourceforge.jp>,
Rich Felker <dalias@...c.org>, linux-sh@...r.kernel.org,
John Paul Adrian Glaubitz <glaubitz@...sik.fu-berlin.de>,
Geert Uytterhoeven <geert+renesas@...der.be>,
Takashi YOSHII <takasi-y@....dti.ne.jp>
Subject: [PATCH 3/5 v3] sh: math-emu: drop unused functions
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: 4b565680d163 ("sh: math-emu support")
Signed-off-by: Randy Dunlap <rdunlap@...radead.org>
Cc: Takashi YOSHII <takasi-y@....dti.ne.jp>
Cc: Yoshinori Sato <ysato@...rs.sourceforge.jp>
Cc: Rich Felker <dalias@...c.org>
Cc: linux-sh@...r.kernel.org
Cc: John Paul Adrian Glaubitz <glaubitz@...sik.fu-berlin.de>
Cc: Geert Uytterhoeven <geert+renesas@...der.be>
---
v3: new patch in this series;
arch/sh/math-emu/math.c | 103 --------------------------------------
1 file changed, 103 deletions(-)
--- linux-next-20211001.orig/arch/sh/math-emu/math.c
+++ linux-next-20211001/arch/sh/math-emu/math.c
@@ -468,109 +468,6 @@ static int fpu_emulate(u16 code, struct
}
/**
- * 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.
*/
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