Remove the float version of the kernel of arg reduction for pi/2, since

it should never have existed and it has not been used for many years
(floats are reduced faster using doubles).  All relevant changes (just
the workaround for broken assignment) have been merged to the double
version.

1 files changed, 0 insertions, 198 deletions

diff --git a/lib/msun/src/k_rem_pio2f.c b/lib/msun/src/k_rem_pio2f.c
deleted file mode 100644
index f1427e6..0000000
--- a/lib/msun/src/k_rem_pio2f.c
+++ /dev/null
@@ -1,198 +0,0 @@
-/* k_rem_pio2f.c -- float version of k_rem_pio2.c
- * Conversion to float by Ian Lance Taylor, Cygnus Support, ian@cygnus.com.
- */
-
-/*
- * ====================================================
- * Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved.
- *
- * Developed at SunPro, a Sun Microsystems, Inc. business.
- * Permission to use, copy, modify, and distribute this
- * software is freely granted, provided that this notice
- * is preserved.
- * ====================================================
- */
-
-#include <sys/cdefs.h>
-__FBSDID("$FreeBSD$");
-
-#include <float.h>
-
-#include "math.h"
-#include "math_private.h"
-
-/* In the float version, the input parameter x contains 8 bit
-   integers, not 24 bit integers.  113 bit precision is not supported.  */
-
-static const int init_jk[] = {4,7,9}; /* initial value for jk */
-
-static const float PIo2[] = {
-  1.5703125000e+00, /* 0x3fc90000 */
-  4.5776367188e-04, /* 0x39f00000 */
-  2.5987625122e-05, /* 0x37da0000 */
-  7.5437128544e-08, /* 0x33a20000 */
-  6.0026650317e-11, /* 0x2e840000 */
-  7.3896444519e-13, /* 0x2b500000 */
-  5.3845816694e-15, /* 0x27c20000 */
-  5.6378512969e-18, /* 0x22d00000 */
-  8.3009228831e-20, /* 0x1fc40000 */
-  3.2756352257e-22, /* 0x1bc60000 */
-  6.3331015649e-25, /* 0x17440000 */
-};
-
-static const float
-zero   = 0.0,
-one    = 1.0,
-two8   =  2.5600000000e+02, /* 0x43800000 */
-twon8  =  3.9062500000e-03; /* 0x3b800000 */
-
-	int __kernel_rem_pio2f(float *x, float *y, int e0, int nx, int prec, const int32_t *ipio2)
-{
-	int32_t jz,jx,jv,jp,jk,carry,n,iq[20],i,j,k,m,q0,ih;
-	float z,fw,f[20],fq[20],q[20];
-
-    /* initialize jk*/
-	jk = init_jk[prec];
-	jp = jk;
-
-    /* determine jx,jv,q0, note that 3>q0 */
-	jx =  nx-1;
-	jv = (e0-3)/8; if(jv<0) jv=0;
-	q0 =  e0-8*(jv+1);
-
-    /* set up f[0] to f[jx+jk] where f[jx+jk] = ipio2[jv+jk] */
-	j = jv-jx; m = jx+jk;
-	for(i=0;i<=m;i++,j++) f[i] = (j<0)? zero : (float) ipio2[j];
-
-    /* compute q[0],q[1],...q[jk] */
-	for (i=0;i<=jk;i++) {
-	    for(j=0,fw=0.0;j<=jx;j++) fw += x[j]*f[jx+i-j]; q[i] = fw;
-	}
-
-	jz = jk;
-recompute:
-    /* distill q[] into iq[] reversingly */
-	for(i=0,j=jz,z=q[jz];j>0;i++,j--) {
-	    fw    =  (float)((int32_t)(twon8* z));
-	    iq[i] =  (int32_t)(z-two8*fw);
-	    z     =  q[j-1]+fw;
-	}
-
-    /* compute n */
-	z  = scalbnf(z,q0);		/* actual value of z */
-	z -= (float)8.0*floorf(z*(float)0.125);	/* trim off integer >= 8 */
-	n  = (int32_t) z;
-	z -= (float)n;
-	ih = 0;
-	if(q0>0) {	/* need iq[jz-1] to determine n */
-	    i  = (iq[jz-1]>>(8-q0)); n += i;
-	    iq[jz-1] -= i<<(8-q0);
-	    ih = iq[jz-1]>>(7-q0);
-	}
-	else if(q0==0) ih = iq[jz-1]>>7;
-	else if(z>=(float)0.5) ih=2;
-
-	if(ih>0) {	/* q > 0.5 */
-	    n += 1; carry = 0;
-	    for(i=0;i<jz ;i++) {	/* compute 1-q */
-		j = iq[i];
-		if(carry==0) {
-		    if(j!=0) {
-			carry = 1; iq[i] = 0x100- j;
-		    }
-		} else  iq[i] = 0xff - j;
-	    }
-	    if(q0>0) {		/* rare case: chance is 1 in 12 */
-	        switch(q0) {
-	        case 1:
-	    	   iq[jz-1] &= 0x7f; break;
-	    	case 2:
-	    	   iq[jz-1] &= 0x3f; break;
-	        }
-	    }
-	    if(ih==2) {
-		z = one - z;
-		if(carry!=0) z -= scalbnf(one,q0);
-	    }
-	}
-
-    /* check if recomputation is needed */
-	if(z==zero) {
-	    j = 0;
-	    for (i=jz-1;i>=jk;i--) j |= iq[i];
-	    if(j==0) { /* need recomputation */
-		for(k=1;iq[jk-k]==0;k++);   /* k = no. of terms needed */
-
-		for(i=jz+1;i<=jz+k;i++) {   /* add q[jz+1] to q[jz+k] */
-		    f[jx+i] = (float) ipio2[jv+i];
-		    for(j=0,fw=0.0;j<=jx;j++) fw += x[j]*f[jx+i-j];
-		    q[i] = fw;
-		}
-		jz += k;
-		goto recompute;
-	    }
-	}
-
-    /* chop off zero terms */
-	if(z==(float)0.0) {
-	    jz -= 1; q0 -= 8;
-	    while(iq[jz]==0) { jz--; q0-=8;}
-	} else { /* break z into 8-bit if necessary */
-	    z = scalbnf(z,-q0);
-	    if(z>=two8) {
-		fw = (float)((int32_t)(twon8*z));
-		iq[jz] = (int32_t)(z-two8*fw);
-		jz += 1; q0 += 8;
-		iq[jz] = (int32_t) fw;
-	    } else iq[jz] = (int32_t) z ;
-	}
-
-    /* convert integer "bit" chunk to floating-point value */
-	fw = scalbnf(one,q0);
-	for(i=jz;i>=0;i--) {
-	    q[i] = fw*(float)iq[i]; fw*=twon8;
-	}
-
-    /* compute PIo2[0,...,jp]*q[jz,...,0] */
-	for(i=jz;i>=0;i--) {
-	    for(fw=0.0,k=0;k<=jp&&k<=jz-i;k++) fw += PIo2[k]*q[i+k];
-	    fq[jz-i] = fw;
-	}
-
-    /* compress fq[] into y[] */
-	switch(prec) {
-	    case 0:
-		fw = 0.0;
-		for (i=jz;i>=0;i--) fw += fq[i];
-		y[0] = (ih==0)? fw: -fw;
-		break;
-	    case 1:
-	    case 2:
-		fw = 0.0;
-		for (i=jz;i>=0;i--) fw += fq[i];
-		STRICT_ASSIGN(float,fw,fw);
-		y[0] = (ih==0)? fw: -fw;
-		fw = fq[0]-fw;
-		for (i=1;i<=jz;i++) fw += fq[i];
-		y[1] = (ih==0)? fw: -fw;
-		break;
-	    case 3:	/* painful */
-		for (i=jz;i>0;i--) {
-		    fw      = fq[i-1]+fq[i];
-		    fq[i]  += fq[i-1]-fw;
-		    fq[i-1] = fw;
-		}
-		for (i=jz;i>1;i--) {
-		    fw      = fq[i-1]+fq[i];
-		    fq[i]  += fq[i-1]-fw;
-		    fq[i-1] = fw;
-		}
-		for (fw=0.0,i=jz;i>=2;i--) fw += fq[i];
-		if(ih==0) {
-		    y[0] =  fq[0]; y[1] =  fq[1]; y[2] =  fw;
-		} else {
-		    y[0] = -fq[0]; y[1] = -fq[1]; y[2] = -fw;
-		}
-	}
-	return n&7;
-}