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-rw-r--r--arch/alpha/include/asm/fpu.h195
1 files changed, 0 insertions, 195 deletions
diff --git a/arch/alpha/include/asm/fpu.h b/arch/alpha/include/asm/fpu.h
deleted file mode 100644
index db00f78..0000000
--- a/arch/alpha/include/asm/fpu.h
+++ /dev/null
@@ -1,195 +0,0 @@
-#ifndef __ASM_ALPHA_FPU_H
-#define __ASM_ALPHA_FPU_H
-
-#include <asm/special_insns.h>
-
-/*
- * Alpha floating-point control register defines:
- */
-#define FPCR_DNOD (1UL<<47) /* denorm INV trap disable */
-#define FPCR_DNZ (1UL<<48) /* denorms to zero */
-#define FPCR_INVD (1UL<<49) /* invalid op disable (opt.) */
-#define FPCR_DZED (1UL<<50) /* division by zero disable (opt.) */
-#define FPCR_OVFD (1UL<<51) /* overflow disable (optional) */
-#define FPCR_INV (1UL<<52) /* invalid operation */
-#define FPCR_DZE (1UL<<53) /* division by zero */
-#define FPCR_OVF (1UL<<54) /* overflow */
-#define FPCR_UNF (1UL<<55) /* underflow */
-#define FPCR_INE (1UL<<56) /* inexact */
-#define FPCR_IOV (1UL<<57) /* integer overflow */
-#define FPCR_UNDZ (1UL<<60) /* underflow to zero (opt.) */
-#define FPCR_UNFD (1UL<<61) /* underflow disable (opt.) */
-#define FPCR_INED (1UL<<62) /* inexact disable (opt.) */
-#define FPCR_SUM (1UL<<63) /* summary bit */
-
-#define FPCR_DYN_SHIFT 58 /* first dynamic rounding mode bit */
-#define FPCR_DYN_CHOPPED (0x0UL << FPCR_DYN_SHIFT) /* towards 0 */
-#define FPCR_DYN_MINUS (0x1UL << FPCR_DYN_SHIFT) /* towards -INF */
-#define FPCR_DYN_NORMAL (0x2UL << FPCR_DYN_SHIFT) /* towards nearest */
-#define FPCR_DYN_PLUS (0x3UL << FPCR_DYN_SHIFT) /* towards +INF */
-#define FPCR_DYN_MASK (0x3UL << FPCR_DYN_SHIFT)
-
-#define FPCR_MASK 0xffff800000000000L
-
-/*
- * IEEE trap enables are implemented in software. These per-thread
- * bits are stored in the "ieee_state" field of "struct thread_info".
- * Thus, the bits are defined so as not to conflict with the
- * floating-point enable bit (which is architected). On top of that,
- * we want to make these bits compatible with OSF/1 so
- * ieee_set_fp_control() etc. can be implemented easily and
- * compatibly. The corresponding definitions are in
- * /usr/include/machine/fpu.h under OSF/1.
- */
-#define IEEE_TRAP_ENABLE_INV (1UL<<1) /* invalid op */
-#define IEEE_TRAP_ENABLE_DZE (1UL<<2) /* division by zero */
-#define IEEE_TRAP_ENABLE_OVF (1UL<<3) /* overflow */
-#define IEEE_TRAP_ENABLE_UNF (1UL<<4) /* underflow */
-#define IEEE_TRAP_ENABLE_INE (1UL<<5) /* inexact */
-#define IEEE_TRAP_ENABLE_DNO (1UL<<6) /* denorm */
-#define IEEE_TRAP_ENABLE_MASK (IEEE_TRAP_ENABLE_INV | IEEE_TRAP_ENABLE_DZE |\
- IEEE_TRAP_ENABLE_OVF | IEEE_TRAP_ENABLE_UNF |\
- IEEE_TRAP_ENABLE_INE | IEEE_TRAP_ENABLE_DNO)
-
-/* Denorm and Underflow flushing */
-#define IEEE_MAP_DMZ (1UL<<12) /* Map denorm inputs to zero */
-#define IEEE_MAP_UMZ (1UL<<13) /* Map underflowed outputs to zero */
-
-#define IEEE_MAP_MASK (IEEE_MAP_DMZ | IEEE_MAP_UMZ)
-
-/* status bits coming from fpcr: */
-#define IEEE_STATUS_INV (1UL<<17)
-#define IEEE_STATUS_DZE (1UL<<18)
-#define IEEE_STATUS_OVF (1UL<<19)
-#define IEEE_STATUS_UNF (1UL<<20)
-#define IEEE_STATUS_INE (1UL<<21)
-#define IEEE_STATUS_DNO (1UL<<22)
-
-#define IEEE_STATUS_MASK (IEEE_STATUS_INV | IEEE_STATUS_DZE | \
- IEEE_STATUS_OVF | IEEE_STATUS_UNF | \
- IEEE_STATUS_INE | IEEE_STATUS_DNO)
-
-#define IEEE_SW_MASK (IEEE_TRAP_ENABLE_MASK | \
- IEEE_STATUS_MASK | IEEE_MAP_MASK)
-
-#define IEEE_CURRENT_RM_SHIFT 32
-#define IEEE_CURRENT_RM_MASK (3UL<<IEEE_CURRENT_RM_SHIFT)
-
-#define IEEE_STATUS_TO_EXCSUM_SHIFT 16
-
-#define IEEE_INHERIT (1UL<<63) /* inherit on thread create? */
-
-/*
- * Convert the software IEEE trap enable and status bits into the
- * hardware fpcr format.
- *
- * Digital Unix engineers receive my thanks for not defining the
- * software bits identical to the hardware bits. The chip designers
- * receive my thanks for making all the not-implemented fpcr bits
- * RAZ forcing us to use system calls to read/write this value.
- */
-
-static inline unsigned long
-ieee_swcr_to_fpcr(unsigned long sw)
-{
- unsigned long fp;
- fp = (sw & IEEE_STATUS_MASK) << 35;
- fp |= (sw & IEEE_MAP_DMZ) << 36;
- fp |= (sw & IEEE_STATUS_MASK ? FPCR_SUM : 0);
- fp |= (~sw & (IEEE_TRAP_ENABLE_INV
- | IEEE_TRAP_ENABLE_DZE
- | IEEE_TRAP_ENABLE_OVF)) << 48;
- fp |= (~sw & (IEEE_TRAP_ENABLE_UNF | IEEE_TRAP_ENABLE_INE)) << 57;
- fp |= (sw & IEEE_MAP_UMZ ? FPCR_UNDZ | FPCR_UNFD : 0);
- fp |= (~sw & IEEE_TRAP_ENABLE_DNO) << 41;
- return fp;
-}
-
-static inline unsigned long
-ieee_fpcr_to_swcr(unsigned long fp)
-{
- unsigned long sw;
- sw = (fp >> 35) & IEEE_STATUS_MASK;
- sw |= (fp >> 36) & IEEE_MAP_DMZ;
- sw |= (~fp >> 48) & (IEEE_TRAP_ENABLE_INV
- | IEEE_TRAP_ENABLE_DZE
- | IEEE_TRAP_ENABLE_OVF);
- sw |= (~fp >> 57) & (IEEE_TRAP_ENABLE_UNF | IEEE_TRAP_ENABLE_INE);
- sw |= (fp >> 47) & IEEE_MAP_UMZ;
- sw |= (~fp >> 41) & IEEE_TRAP_ENABLE_DNO;
- return sw;
-}
-
-#ifdef __KERNEL__
-
-/* The following two functions don't need trapb/excb instructions
- around the mf_fpcr/mt_fpcr instructions because (a) the kernel
- never generates arithmetic faults and (b) call_pal instructions
- are implied trap barriers. */
-
-static inline unsigned long
-rdfpcr(void)
-{
- unsigned long tmp, ret;
-
-#if defined(CONFIG_ALPHA_EV6) || defined(CONFIG_ALPHA_EV67)
- __asm__ __volatile__ (
- "ftoit $f0,%0\n\t"
- "mf_fpcr $f0\n\t"
- "ftoit $f0,%1\n\t"
- "itoft %0,$f0"
- : "=r"(tmp), "=r"(ret));
-#else
- __asm__ __volatile__ (
- "stt $f0,%0\n\t"
- "mf_fpcr $f0\n\t"
- "stt $f0,%1\n\t"
- "ldt $f0,%0"
- : "=m"(tmp), "=m"(ret));
-#endif
-
- return ret;
-}
-
-static inline void
-wrfpcr(unsigned long val)
-{
- unsigned long tmp;
-
-#if defined(CONFIG_ALPHA_EV6) || defined(CONFIG_ALPHA_EV67)
- __asm__ __volatile__ (
- "ftoit $f0,%0\n\t"
- "itoft %1,$f0\n\t"
- "mt_fpcr $f0\n\t"
- "itoft %0,$f0"
- : "=&r"(tmp) : "r"(val));
-#else
- __asm__ __volatile__ (
- "stt $f0,%0\n\t"
- "ldt $f0,%1\n\t"
- "mt_fpcr $f0\n\t"
- "ldt $f0,%0"
- : "=m"(tmp) : "m"(val));
-#endif
-}
-
-static inline unsigned long
-swcr_update_status(unsigned long swcr, unsigned long fpcr)
-{
- /* EV6 implements most of the bits in hardware. Collect
- the acrued exception bits from the real fpcr. */
- if (implver() == IMPLVER_EV6) {
- swcr &= ~IEEE_STATUS_MASK;
- swcr |= (fpcr >> 35) & IEEE_STATUS_MASK;
- }
- return swcr;
-}
-
-extern unsigned long alpha_read_fp_reg (unsigned long reg);
-extern void alpha_write_fp_reg (unsigned long reg, unsigned long val);
-extern unsigned long alpha_read_fp_reg_s (unsigned long reg);
-extern void alpha_write_fp_reg_s (unsigned long reg, unsigned long val);
-
-#endif /* __KERNEL__ */
-
-#endif /* __ASM_ALPHA_FPU_H */