From 9cd2e9ec8fc0127393dfce9c0359d500c8c238be Mon Sep 17 00:00:00 2001
From: Edward Rudd <urkle@outoforder.cc>
Date: Tue, 09 Apr 2019 02:22:50 +0000
Subject: [PATCH] updae source to 2.0.9 source
---
source/src/libm/k_rem_pio2.c | 22 ++++++++++++++++++++--
1 files changed, 20 insertions(+), 2 deletions(-)
diff --git a/source/src/libm/k_rem_pio2.c b/source/src/libm/k_rem_pio2.c
index 7b04275..393db54 100644
--- a/source/src/libm/k_rem_pio2.c
+++ b/source/src/libm/k_rem_pio2.c
@@ -128,6 +128,8 @@
#include "math_libm.h"
#include "math_private.h"
+#include "SDL_assert.h"
+
static const int init_jk[] = {2,3,4,6}; /* initial value for jk */
static const double PIo2[] = {
@@ -147,13 +149,19 @@
two24 = 1.67772160000000000000e+07, /* 0x41700000, 0x00000000 */
twon24 = 5.96046447753906250000e-08; /* 0x3E700000, 0x00000000 */
-int attribute_hidden __kernel_rem_pio2(double *x, double *y, int e0, int nx, int prec, const int32_t *ipio2)
+int32_t attribute_hidden __kernel_rem_pio2(double *x, double *y, int e0, int nx, const unsigned int prec, const int32_t *ipio2)
{
int32_t jz,jx,jv,jp,jk,carry,n,iq[20],i,j,k,m,q0,ih;
double z,fw,f[20],fq[20],q[20];
+ if (nx < 1) {
+ return 0;
+ }
+
/* initialize jk*/
+ SDL_assert(prec < SDL_arraysize(init_jk));
jk = init_jk[prec];
+ SDL_assert(jk > 0);
jp = jk;
/* determine jx,jv,q0, note that 3>q0 */
@@ -164,6 +172,9 @@
/* 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 : (double) ipio2[j];
+ if ((m+1) < SDL_arraysize(f)) {
+ SDL_memset(&f[m+1], 0, sizeof (f) - ((m+1) * sizeof (f[0])));
+ }
/* compute q[0],q[1],...q[jk] */
for (i=0;i<=jk;i++) {
@@ -179,6 +190,9 @@
iq[i] = (int32_t)(z-two24*fw);
z = q[j-1]+fw;
}
+ if (jz < SDL_arraysize(iq)) {
+ SDL_memset(&iq[jz], 0, sizeof (q) - (jz * sizeof (iq[0])));
+ }
/* compute n */
z = scalbn(z,q0); /* actual value of z */
@@ -238,7 +252,8 @@
/* chop off zero terms */
if(z==0.0) {
jz -= 1; q0 -= 24;
- while(iq[jz]==0) { jz--; q0-=24;}
+ SDL_assert(jz >= 0);
+ while(iq[jz]==0) { jz--; SDL_assert(jz >= 0); q0-=24;}
} else { /* break z into 24-bit if necessary */
z = scalbn(z,-q0);
if(z>=two24) {
@@ -260,6 +275,9 @@
for(fw=0.0,k=0;k<=jp&&k<=jz-i;k++) fw += PIo2[k]*q[i+k];
fq[jz-i] = fw;
}
+ if ((jz+1) < SDL_arraysize(f)) {
+ SDL_memset(&fq[jz+1], 0, sizeof (fq) - ((jz+1) * sizeof (fq[0])));
+ }
/* compress fq[] into y[] */
switch(prec) {
--
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