[PATCH] powerpc: Move arch/ppc*/kernel/vecemu.c to arch/powerpc
authorStephen Rothwell <sfr@canb.auug.org.au>
Mon, 19 Sep 2005 07:33:25 +0000 (17:33 +1000)
committerPaul Mackerras <paulus@samba.org>
Wed, 21 Sep 2005 09:21:07 +0000 (19:21 +1000)
This file is the same in both architectures so create arch/powerpc/kernel
and move it there.

Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au>
Signed-off-by: Paul Mackerras <paulus@samba.org>
arch/powerpc/kernel/vecemu.c [moved from arch/ppc/kernel/vecemu.c with 100% similarity]
arch/ppc/kernel/Makefile
arch/ppc64/kernel/Makefile
arch/ppc64/kernel/vecemu.c [deleted file]

index 1fb92f16acd61efba7b3a1c641c13e485523b6d7..abf10dcb787bd65fce60503df17a6485e1969d84 100644 (file)
@@ -36,3 +36,5 @@ ifndef CONFIG_MATH_EMULATION
 obj-$(CONFIG_8xx)              += softemu8xx.o
 endif
 
+# These are here while we do the architecture merge
+vecemu-y                       += ../../powerpc/kernel/vecemu.o
index ae60eb1193c6c5bd90cafc5c603cc2cdb4b54d3f..813718df4f8245caeb3cf1c971b403bcc57b9412 100644 (file)
@@ -83,3 +83,6 @@ ifeq ($(CONFIG_PPC_ISERIES),y)
 arch/ppc64/kernel/head.o: arch/ppc64/kernel/lparmap.s
 AFLAGS_head.o += -Iarch/ppc64/kernel
 endif
+
+# These are here while we do the architecture merge
+vecemu-y                       += ../../powerpc/kernel/vecemu.o
diff --git a/arch/ppc64/kernel/vecemu.c b/arch/ppc64/kernel/vecemu.c
deleted file mode 100644 (file)
index cb20762..0000000
+++ /dev/null
@@ -1,346 +0,0 @@
-/*
- * Routines to emulate some Altivec/VMX instructions, specifically
- * those that can trap when given denormalized operands in Java mode.
- */
-#include <linux/kernel.h>
-#include <linux/errno.h>
-#include <linux/sched.h>
-#include <asm/ptrace.h>
-#include <asm/processor.h>
-#include <asm/uaccess.h>
-
-/* Functions in vector.S */
-extern void vaddfp(vector128 *dst, vector128 *a, vector128 *b);
-extern void vsubfp(vector128 *dst, vector128 *a, vector128 *b);
-extern void vmaddfp(vector128 *dst, vector128 *a, vector128 *b, vector128 *c);
-extern void vnmsubfp(vector128 *dst, vector128 *a, vector128 *b, vector128 *c);
-extern void vrefp(vector128 *dst, vector128 *src);
-extern void vrsqrtefp(vector128 *dst, vector128 *src);
-extern void vexptep(vector128 *dst, vector128 *src);
-
-static unsigned int exp2s[8] = {
-       0x800000,
-       0x8b95c2,
-       0x9837f0,
-       0xa5fed7,
-       0xb504f3,
-       0xc5672a,
-       0xd744fd,
-       0xeac0c7
-};
-
-/*
- * Computes an estimate of 2^x.  The `s' argument is the 32-bit
- * single-precision floating-point representation of x.
- */
-static unsigned int eexp2(unsigned int s)
-{
-       int exp, pwr;
-       unsigned int mant, frac;
-
-       /* extract exponent field from input */
-       exp = ((s >> 23) & 0xff) - 127;
-       if (exp > 7) {
-               /* check for NaN input */
-               if (exp == 128 && (s & 0x7fffff) != 0)
-                       return s | 0x400000;    /* return QNaN */
-               /* 2^-big = 0, 2^+big = +Inf */
-               return (s & 0x80000000)? 0: 0x7f800000; /* 0 or +Inf */
-       }
-       if (exp < -23)
-               return 0x3f800000;      /* 1.0 */
-
-       /* convert to fixed point integer in 9.23 representation */
-       pwr = (s & 0x7fffff) | 0x800000;
-       if (exp > 0)
-               pwr <<= exp;
-       else
-               pwr >>= -exp;
-       if (s & 0x80000000)
-               pwr = -pwr;
-
-       /* extract integer part, which becomes exponent part of result */
-       exp = (pwr >> 23) + 126;
-       if (exp >= 254)
-               return 0x7f800000;
-       if (exp < -23)
-               return 0;
-
-       /* table lookup on top 3 bits of fraction to get mantissa */
-       mant = exp2s[(pwr >> 20) & 7];
-
-       /* linear interpolation using remaining 20 bits of fraction */
-       asm("mulhwu %0,%1,%2" : "=r" (frac)
-           : "r" (pwr << 12), "r" (0x172b83ff));
-       asm("mulhwu %0,%1,%2" : "=r" (frac) : "r" (frac), "r" (mant));
-       mant += frac;
-
-       if (exp >= 0)
-               return mant + (exp << 23);
-
-       /* denormalized result */
-       exp = -exp;
-       mant += 1 << (exp - 1);
-       return mant >> exp;
-}
-
-/*
- * Computes an estimate of log_2(x).  The `s' argument is the 32-bit
- * single-precision floating-point representation of x.
- */
-static unsigned int elog2(unsigned int s)
-{
-       int exp, mant, lz, frac;
-
-       exp = s & 0x7f800000;
-       mant = s & 0x7fffff;
-       if (exp == 0x7f800000) {        /* Inf or NaN */
-               if (mant != 0)
-                       s |= 0x400000;  /* turn NaN into QNaN */
-               return s;
-       }
-       if ((exp | mant) == 0)          /* +0 or -0 */
-               return 0xff800000;      /* return -Inf */
-
-       if (exp == 0) {
-               /* denormalized */
-               asm("cntlzw %0,%1" : "=r" (lz) : "r" (mant));
-               mant <<= lz - 8;
-               exp = (-118 - lz) << 23;
-       } else {
-               mant |= 0x800000;
-               exp -= 127 << 23;
-       }
-
-       if (mant >= 0xb504f3) {                         /* 2^0.5 * 2^23 */
-               exp |= 0x400000;                        /* 0.5 * 2^23 */
-               asm("mulhwu %0,%1,%2" : "=r" (mant)
-                   : "r" (mant), "r" (0xb504f334));    /* 2^-0.5 * 2^32 */
-       }
-       if (mant >= 0x9837f0) {                         /* 2^0.25 * 2^23 */
-               exp |= 0x200000;                        /* 0.25 * 2^23 */
-               asm("mulhwu %0,%1,%2" : "=r" (mant)
-                   : "r" (mant), "r" (0xd744fccb));    /* 2^-0.25 * 2^32 */
-       }
-       if (mant >= 0x8b95c2) {                         /* 2^0.125 * 2^23 */
-               exp |= 0x100000;                        /* 0.125 * 2^23 */
-               asm("mulhwu %0,%1,%2" : "=r" (mant)
-                   : "r" (mant), "r" (0xeac0c6e8));    /* 2^-0.125 * 2^32 */
-       }
-       if (mant > 0x800000) {                          /* 1.0 * 2^23 */
-               /* calculate (mant - 1) * 1.381097463 */
-               /* 1.381097463 == 0.125 / (2^0.125 - 1) */
-               asm("mulhwu %0,%1,%2" : "=r" (frac)
-                   : "r" ((mant - 0x800000) << 1), "r" (0xb0c7cd3a));
-               exp += frac;
-       }
-       s = exp & 0x80000000;
-       if (exp != 0) {
-               if (s)
-                       exp = -exp;
-               asm("cntlzw %0,%1" : "=r" (lz) : "r" (exp));
-               lz = 8 - lz;
-               if (lz > 0)
-                       exp >>= lz;
-               else if (lz < 0)
-                       exp <<= -lz;
-               s += ((lz + 126) << 23) + exp;
-       }
-       return s;
-}
-
-#define VSCR_SAT       1
-
-static int ctsxs(unsigned int x, int scale, unsigned int *vscrp)
-{
-       int exp, mant;
-
-       exp = (x >> 23) & 0xff;
-       mant = x & 0x7fffff;
-       if (exp == 255 && mant != 0)
-               return 0;               /* NaN -> 0 */
-       exp = exp - 127 + scale;
-       if (exp < 0)
-               return 0;               /* round towards zero */
-       if (exp >= 31) {
-               /* saturate, unless the result would be -2^31 */
-               if (x + (scale << 23) != 0xcf000000)
-                       *vscrp |= VSCR_SAT;
-               return (x & 0x80000000)? 0x80000000: 0x7fffffff;
-       }
-       mant |= 0x800000;
-       mant = (mant << 7) >> (30 - exp);
-       return (x & 0x80000000)? -mant: mant;
-}
-
-static unsigned int ctuxs(unsigned int x, int scale, unsigned int *vscrp)
-{
-       int exp;
-       unsigned int mant;
-
-       exp = (x >> 23) & 0xff;
-       mant = x & 0x7fffff;
-       if (exp == 255 && mant != 0)
-               return 0;               /* NaN -> 0 */
-       exp = exp - 127 + scale;
-       if (exp < 0)
-               return 0;               /* round towards zero */
-       if (x & 0x80000000) {
-               /* negative => saturate to 0 */
-               *vscrp |= VSCR_SAT;
-               return 0;
-       }
-       if (exp >= 32) {
-               /* saturate */
-               *vscrp |= VSCR_SAT;
-               return 0xffffffff;
-       }
-       mant |= 0x800000;
-       mant = (mant << 8) >> (31 - exp);
-       return mant;
-}
-
-/* Round to floating integer, towards 0 */
-static unsigned int rfiz(unsigned int x)
-{
-       int exp;
-
-       exp = ((x >> 23) & 0xff) - 127;
-       if (exp == 128 && (x & 0x7fffff) != 0)
-               return x | 0x400000;    /* NaN -> make it a QNaN */
-       if (exp >= 23)
-               return x;               /* it's an integer already (or Inf) */
-       if (exp < 0)
-               return x & 0x80000000;  /* |x| < 1.0 rounds to 0 */
-       return x & ~(0x7fffff >> exp);
-}
-
-/* Round to floating integer, towards +/- Inf */
-static unsigned int rfii(unsigned int x)
-{
-       int exp, mask;
-
-       exp = ((x >> 23) & 0xff) - 127;
-       if (exp == 128 && (x & 0x7fffff) != 0)
-               return x | 0x400000;    /* NaN -> make it a QNaN */
-       if (exp >= 23)
-               return x;               /* it's an integer already (or Inf) */
-       if ((x & 0x7fffffff) == 0)
-               return x;               /* +/-0 -> +/-0 */
-       if (exp < 0)
-               /* 0 < |x| < 1.0 rounds to +/- 1.0 */
-               return (x & 0x80000000) | 0x3f800000;
-       mask = 0x7fffff >> exp;
-       /* mantissa overflows into exponent - that's OK,
-          it can't overflow into the sign bit */
-       return (x + mask) & ~mask;
-}
-
-/* Round to floating integer, to nearest */
-static unsigned int rfin(unsigned int x)
-{
-       int exp, half;
-
-       exp = ((x >> 23) & 0xff) - 127;
-       if (exp == 128 && (x & 0x7fffff) != 0)
-               return x | 0x400000;    /* NaN -> make it a QNaN */
-       if (exp >= 23)
-               return x;               /* it's an integer already (or Inf) */
-       if (exp < -1)
-               return x & 0x80000000;  /* |x| < 0.5 -> +/-0 */
-       if (exp == -1)
-               /* 0.5 <= |x| < 1.0 rounds to +/- 1.0 */
-               return (x & 0x80000000) | 0x3f800000;
-       half = 0x400000 >> exp;
-       /* add 0.5 to the magnitude and chop off the fraction bits */
-       return (x + half) & ~(0x7fffff >> exp);
-}
-
-int
-emulate_altivec(struct pt_regs *regs)
-{
-       unsigned int instr, i;
-       unsigned int va, vb, vc, vd;
-       vector128 *vrs;
-
-       if (get_user(instr, (unsigned int __user *) regs->nip))
-               return -EFAULT;
-       if ((instr >> 26) != 4)
-               return -EINVAL;         /* not an altivec instruction */
-       vd = (instr >> 21) & 0x1f;
-       va = (instr >> 16) & 0x1f;
-       vb = (instr >> 11) & 0x1f;
-       vc = (instr >> 6) & 0x1f;
-
-       vrs = current->thread.vr;
-       switch (instr & 0x3f) {
-       case 10:
-               switch (vc) {
-               case 0: /* vaddfp */
-                       vaddfp(&vrs[vd], &vrs[va], &vrs[vb]);
-                       break;
-               case 1: /* vsubfp */
-                       vsubfp(&vrs[vd], &vrs[va], &vrs[vb]);
-                       break;
-               case 4: /* vrefp */
-                       vrefp(&vrs[vd], &vrs[vb]);
-                       break;
-               case 5: /* vrsqrtefp */
-                       vrsqrtefp(&vrs[vd], &vrs[vb]);
-                       break;
-               case 6: /* vexptefp */
-                       for (i = 0; i < 4; ++i)
-                               vrs[vd].u[i] = eexp2(vrs[vb].u[i]);
-                       break;
-               case 7: /* vlogefp */
-                       for (i = 0; i < 4; ++i)
-                               vrs[vd].u[i] = elog2(vrs[vb].u[i]);
-                       break;
-               case 8:         /* vrfin */
-                       for (i = 0; i < 4; ++i)
-                               vrs[vd].u[i] = rfin(vrs[vb].u[i]);
-                       break;
-               case 9:         /* vrfiz */
-                       for (i = 0; i < 4; ++i)
-                               vrs[vd].u[i] = rfiz(vrs[vb].u[i]);
-                       break;
-               case 10:        /* vrfip */
-                       for (i = 0; i < 4; ++i) {
-                               u32 x = vrs[vb].u[i];
-                               x = (x & 0x80000000)? rfiz(x): rfii(x);
-                               vrs[vd].u[i] = x;
-                       }
-                       break;
-               case 11:        /* vrfim */
-                       for (i = 0; i < 4; ++i) {
-                               u32 x = vrs[vb].u[i];
-                               x = (x & 0x80000000)? rfii(x): rfiz(x);
-                               vrs[vd].u[i] = x;
-                       }
-                       break;
-               case 14:        /* vctuxs */
-                       for (i = 0; i < 4; ++i)
-                               vrs[vd].u[i] = ctuxs(vrs[vb].u[i], va,
-                                               &current->thread.vscr.u[3]);
-                       break;
-               case 15:        /* vctsxs */
-                       for (i = 0; i < 4; ++i)
-                               vrs[vd].u[i] = ctsxs(vrs[vb].u[i], va,
-                                               &current->thread.vscr.u[3]);
-                       break;
-               default:
-                       return -EINVAL;
-               }
-               break;
-       case 46:        /* vmaddfp */
-               vmaddfp(&vrs[vd], &vrs[va], &vrs[vb], &vrs[vc]);
-               break;
-       case 47:        /* vnmsubfp */
-               vnmsubfp(&vrs[vd], &vrs[va], &vrs[vb], &vrs[vc]);
-               break;
-       default:
-               return -EINVAL;
-       }
-
-       return 0;
-}