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#define _GNU_SOURCE
#include <fenv.h>
#include <stdbool.h>
#include <stdio.h>
#include <string.h>
/*
* vfmin/vfmax instruction execution.
*/
#define VFMIN 0xEE
#define VFMAX 0xEF
extern char insn[6];
asm(".pushsection .rwx,\"awx\",@progbits\n"
".globl insn\n"
/* e7 89 a0 00 2e ef */
"insn: vfmaxsb %v24,%v25,%v26,0\n"
".popsection\n");
static void vfminmax(unsigned int op,
unsigned int m4, unsigned int m5, unsigned int m6,
void *v1, const void *v2, const void *v3)
{
insn[3] = (m6 << 4) | m5;
insn[4] = (m4 << 4) | 0x0e;
insn[5] = op;
asm("vl %%v25,%[v2]\n"
"vl %%v26,%[v3]\n"
"ex 0,%[insn]\n"
"vst %%v24,%[v1]\n"
: [v1] "=m" (*(char (*)[16])v1)
: [v2] "m" (*(char (*)[16])v2)
, [v3] "m" (*(char (*)[16])v3)
, [insn] "m"(insn)
: "v24", "v25", "v26");
}
/*
* Floating-point value classes.
*/
#define N_FORMATS 3
#define N_SIGNED_CLASSES 8
static const size_t float_sizes[N_FORMATS] = {
/* M4 == 2: short */ 4,
/* M4 == 3: long */ 8,
/* M4 == 4: extended */ 16,
};
static const size_t e_bits[N_FORMATS] = {
/* M4 == 2: short */ 8,
/* M4 == 3: long */ 11,
/* M4 == 4: extended */ 15,
};
static const unsigned char signed_floats[N_FORMATS][N_SIGNED_CLASSES][2][16] = {
/* M4 == 2: short */
{
/* -inf */ {{0xff, 0x80, 0x00, 0x00},
{0xff, 0x80, 0x00, 0x00}},
/* -Fn */ {{0xc2, 0x28, 0x00, 0x00},
{0xc2, 0x29, 0x00, 0x00}},
/* -0 */ {{0x80, 0x00, 0x00, 0x00},
{0x80, 0x00, 0x00, 0x00}},
/* +0 */ {{0x00, 0x00, 0x00, 0x00},
{0x00, 0x00, 0x00, 0x00}},
/* +Fn */ {{0x42, 0x28, 0x00, 0x00},
{0x42, 0x2a, 0x00, 0x00}},
/* +inf */ {{0x7f, 0x80, 0x00, 0x00},
{0x7f, 0x80, 0x00, 0x00}},
/* QNaN */ {{0x7f, 0xff, 0xff, 0xff},
{0x7f, 0xff, 0xff, 0xfe}},
/* SNaN */ {{0x7f, 0xbf, 0xff, 0xff},
{0x7f, 0xbf, 0xff, 0xfd}},
},
/* M4 == 3: long */
{
/* -inf */ {{0xff, 0xf0, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00},
{0xff, 0xf0, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00}},
/* -Fn */ {{0xc0, 0x45, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00},
{0xc0, 0x46, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00}},
/* -0 */ {{0x80, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00},
{0x80, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00}},
/* +0 */ {{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00},
{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00}},
/* +Fn */ {{0x40, 0x45, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00},
{0x40, 0x47, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00}},
/* +inf */ {{0x7f, 0xf0, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00},
{0x7f, 0xf0, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00}},
/* QNaN */ {{0x7f, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff},
{0x7f, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xfe}},
/* SNaN */ {{0x7f, 0xf7, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff},
{0x7f, 0xf7, 0xff, 0xff, 0xff, 0xff, 0xff, 0xfd}},
},
/* M4 == 4: extended */
{
/* -inf */ {{0xff, 0xff, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00},
{0xff, 0xff, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00}},
/* -Fn */ {{0xc0, 0x04, 0x50, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00},
{0xc0, 0x04, 0x51, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00}},
/* -0 */ {{0x80, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00},
{0x80, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00}},
/* +0 */ {{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00},
{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00}},
/* +Fn */ {{0x40, 0x04, 0x50, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00},
{0x40, 0x04, 0x52, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00}},
/* +inf */ {{0x7f, 0xff, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00},
{0x7f, 0xff, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00}},
/* QNaN */ {{0x7f, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff},
{0x7f, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xfe}},
/* SNaN */ {{0x7f, 0xff, 0x7f, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff},
{0x7f, 0xff, 0x7f, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xfd}},
},
};
/*
* PoP tables as close to the original as possible.
*/
struct signed_test {
int op;
int m6;
const char *m6_desc;
const char *table[N_SIGNED_CLASSES][N_SIGNED_CLASSES];
} signed_tests[] = {
{
.op = VFMIN,
.m6 = 0,
.m6_desc = "IEEE MinNum",
.table = {
/* -inf -Fn -0 +0 +Fn +inf QNaN SNaN */
{/* -inf */ "T(a)", "T(a)", "T(a)", "T(a)", "T(a)", "T(a)", "T(a)", "Xi: T(b*)"},
{/* -Fn */ "T(b)", "T(M(a,b))", "T(a)", "T(a)", "T(a)", "T(a)", "T(a)", "Xi: T(b*)"},
{/* -0 */ "T(b)", "T(b)", "T(a)", "T(a)", "T(a)", "T(a)", "T(a)", "Xi: T(b*)"},
{/* +0 */ "T(b)", "T(b)", "T(b)", "T(a)", "T(a)", "T(a)", "T(a)", "Xi: T(b*)"},
{/* +Fn */ "T(b)", "T(b)", "T(b)", "T(b)", "T(M(a,b))", "T(a)", "T(a)", "Xi: T(b*)"},
{/* +inf */ "T(b)", "T(b)", "T(b)", "T(b)", "T(b)", "T(a)", "T(a)", "Xi: T(b*)"},
{/* QNaN */ "T(b)", "T(b)", "T(b)", "T(b)", "T(b)", "T(b)", "T(a)", "Xi: T(b*)"},
{/* SNaN */ "Xi: T(a*)", "Xi: T(a*)", "Xi: T(a*)", "Xi: T(a*)", "Xi: T(a*)", "Xi: T(a*)", "Xi: T(a*)", "Xi: T(a*)"},
},
},
{
.op = VFMIN,
.m6 = 1,
.m6_desc = "JAVA Math.Min()",
.table = {
/* -inf -Fn -0 +0 +Fn +inf QNaN SNaN */
{/* -inf */ "T(b)", "T(a)", "T(a)", "T(a)", "T(a)", "T(a)", "T(b)", "Xi: T(b*)"},
{/* -Fn */ "T(b)", "T(M(a,b))", "T(a)", "T(a)", "T(a)", "T(a)", "T(b)", "Xi: T(b*)"},
{/* -0 */ "T(b)", "T(b)", "T(b)", "T(a)", "T(a)", "T(a)", "T(b)", "Xi: T(b*)"},
{/* +0 */ "T(b)", "T(b)", "T(b)", "T(b)", "T(a)", "T(a)", "T(b)", "Xi: T(b*)"},
{/* +Fn */ "T(b)", "T(b)", "T(b)", "T(b)", "T(M(a,b))", "T(a)", "T(b)", "Xi: T(b*)"},
{/* +inf */ "T(b)", "T(b)", "T(b)", "T(b)", "T(b)", "T(b)", "T(b)", "Xi: T(b*)"},
{/* QNaN */ "T(a)", "T(a)", "T(a)", "T(a)", "T(a)", "T(a)", "T(a)", "Xi: T(b*)"},
{/* SNaN */ "Xi: T(a*)", "Xi: T(a*)", "Xi: T(a*)", "Xi: T(a*)", "Xi: T(a*)", "Xi: T(a*)", "Xi: T(a*)", "Xi: T(a*)"},
},
},
{
.op = VFMIN,
.m6 = 2,
.m6_desc = "C-style Min Macro",
.table = {
/* -inf -Fn -0 +0 +Fn +inf QNaN SNaN */
{/* -inf */ "T(b)", "T(a)", "T(a)", "T(a)", "T(a)", "T(a)", "Xi: T(b)", "Xi: T(b)"},
{/* -Fn */ "T(b)", "T(M(a,b))", "T(a)", "T(a)", "T(a)", "T(a)", "Xi: T(b)", "Xi: T(b)"},
{/* -0 */ "T(b)", "T(b)", "T(b)", "T(b)", "T(a)", "T(a)", "Xi: T(b)", "Xi: T(b)"},
{/* +0 */ "T(b)", "T(b)", "T(b)", "T(b)", "T(a)", "T(a)", "Xi: T(b)", "Xi: T(b)"},
{/* +Fn */ "T(b)", "T(b)", "T(b)", "T(b)", "T(M(a,b))", "T(a)", "Xi: T(b)", "Xi: T(b)"},
{/* +inf */ "T(b)", "T(b)", "T(b)", "T(b)", "T(b)", "T(a)", "Xi: T(b)", "Xi: T(b)"},
{/* QNaN */ "Xi: T(b)", "Xi: T(b)", "Xi: T(b)", "Xi: T(b)", "Xi: T(b)", "Xi: T(b)", "Xi: T(b)", "Xi: T(b)"},
{/* SNaN */ "Xi: T(b)", "Xi: T(b)", "Xi: T(b)", "Xi: T(b)", "Xi: T(b)", "Xi: T(b)", "Xi: T(b)", "Xi: T(b)"},
},
},
{
.op = VFMIN,
.m6 = 3,
.m6_desc = "C++ algorithm.min()",
.table = {
/* -inf -Fn -0 +0 +Fn +inf QNaN SNaN */
{/* -inf */ "T(b)", "T(a)", "T(a)", "T(a)", "T(a)", "T(a)", "Xi: T(a)", "Xi: T(a)"},
{/* -Fn */ "T(b)", "T(M(a,b))", "T(a)", "T(a)", "T(a)", "T(a)", "Xi: T(a)", "Xi: T(a)"},
{/* -0 */ "T(b)", "T(b)", "T(a)", "T(a)", "T(a)", "T(a)", "Xi: T(a)", "Xi: T(a)"},
{/* +0 */ "T(b)", "T(b)", "T(a)", "T(a)", "T(a)", "T(a)", "Xi: T(a)", "Xi: T(a)"},
{/* +Fn */ "T(b)", "T(b)", "T(b)", "T(b)", "T(M(a,b))", "T(a)", "Xi: T(a)", "Xi: T(a)"},
{/* +inf */ "T(b)", "T(b)", "T(b)", "T(b)", "T(b)", "T(a)", "Xi: T(a)", "Xi: T(a)"},
{/* QNaN */ "Xi: T(a)", "Xi: T(a)", "Xi: T(a)", "Xi: T(a)", "Xi: T(a)", "Xi: T(a)", "Xi: T(a)", "Xi: T(a)"},
{/* SNaN */ "Xi: T(a)", "Xi: T(a)", "Xi: T(a)", "Xi: T(a)", "Xi: T(a)", "Xi: T(a)", "Xi: T(a)", "Xi: T(a)"},
},
},
{
.op = VFMIN,
.m6 = 4,
.m6_desc = "fmin()",
.table = {
/* -inf -Fn -0 +0 +Fn +inf QNaN SNaN */
{/* -inf */ "T(a)", "T(a)", "T(a)", "T(a)", "T(a)", "T(a)", "T(a)", "Xi: T(a)"},
{/* -Fn */ "T(b)", "T(M(a,b))", "T(a)", "T(a)", "T(a)", "T(a)", "T(a)", "Xi: T(a)"},
{/* -0 */ "T(b)", "T(b)", "T(a)", "T(a)", "T(a)", "T(a)", "T(a)", "Xi: T(a)"},
{/* +0 */ "T(b)", "T(b)", "T(b)", "T(a)", "T(a)", "T(a)", "T(a)", "Xi: T(a)"},
{/* +Fn */ "T(b)", "T(b)", "T(b)", "T(b)", "T(M(a,b))", "T(a)", "T(a)", "Xi: T(a)"},
{/* +inf */ "T(b)", "T(b)", "T(b)", "T(b)", "T(b)", "T(a)", "T(a)", "Xi: T(a)"},
{/* QNaN */ "T(b)", "T(b)", "T(b)", "T(b)", "T(b)", "T(b)", "T(a)", "Xi: T(a)"},
{/* SNaN */ "Xi: T(b)", "Xi: T(b)", "Xi: T(b)", "Xi: T(b)", "Xi: T(b)", "Xi: T(b)", "Xi: T(a)", "Xi: T(a)"},
},
},
{
.op = VFMAX,
.m6 = 0,
.m6_desc = "IEEE MaxNum",
.table = {
/* -inf -Fn -0 +0 +Fn +inf QNaN SNaN */
{/* -inf */ "T(a)", "T(b)", "T(b)", "T(b)", "T(b)", "T(b)", "T(a)", "Xi: T(b*)"},
{/* -Fn */ "T(a)", "T(M(a,b))", "T(b)", "T(b)", "T(b)", "T(b)", "T(a)", "Xi: T(b*)"},
{/* -0 */ "T(a)", "T(a)", "T(a)", "T(b)", "T(b)", "T(b)", "T(a)", "Xi: T(b*)"},
{/* +0 */ "T(a)", "T(a)", "T(a)", "T(a)", "T(b)", "T(b)", "T(a)", "Xi: T(b*)"},
{/* +Fn */ "T(a)", "T(a)", "T(a)", "T(a)", "T(M(a,b))", "T(b)", "T(a)", "Xi: T(b*)"},
{/* +inf */ "T(a)", "T(a)", "T(a)", "T(a)", "T(a)", "T(a)", "T(a)", "Xi: T(b*)"},
{/* QNaN */ "T(b)", "T(b)", "T(b)", "T(b)", "T(b)", "T(b)", "T(a)", "Xi: T(b*)"},
{/* SNaN */ "Xi: T(a*)", "Xi: T(a*)", "Xi: T(a*)", "Xi: T(a*)", "Xi: T(a*)", "Xi: T(a*)", "Xi: T(a*)", "Xi: T(a*)"},
},
},
{
.op = VFMAX,
.m6 = 1,
.m6_desc = "JAVA Math.Max()",
.table = {
/* -inf -Fn -0 +0 +Fn +inf QNaN SNaN */
{/* -inf */ "T(a)", "T(b)", "T(b)", "T(b)", "T(b)", "T(b)", "T(b)", "Xi: T(b*)"},
{/* -Fn */ "T(a)", "T(M(a,b))", "T(b)", "T(b)", "T(b)", "T(b)", "T(b)", "Xi: T(b*)"},
{/* -0 */ "T(a)", "T(a)", "T(a)", "T(b)", "T(b)", "T(b)", "T(b)", "Xi: T(b*)"},
{/* +0 */ "T(a)", "T(a)", "T(a)", "T(a)", "T(b)", "T(b)", "T(b)", "Xi: T(b*)"},
{/* +Fn */ "T(a)", "T(a)", "T(a)", "T(a)", "T(M(a,b))", "T(b)", "T(b)", "Xi: T(b*)"},
{/* +inf */ "T(a)", "T(a)", "T(a)", "T(a)", "T(a)", "T(a)", "T(b)", "Xi: T(b*)"},
{/* QNaN */ "T(a)", "T(a)", "T(a)", "T(a)", "T(a)", "T(a)", "T(a)", "Xi: T(b*)"},
{/* SNaN */ "Xi: T(a*)", "Xi: T(a*)", "Xi: T(a*)", "Xi: T(a*)", "Xi: T(a*)", "Xi: T(a*)", "Xi: T(a*)", "Xi: T(a*)"},
},
},
{
.op = VFMAX,
.m6 = 2,
.m6_desc = "C-style Max Macro",
.table = {
/* -inf -Fn -0 +0 +Fn +inf QNaN SNaN */
{/* -inf */ "T(b)", "T(b)", "T(b)", "T(b)", "T(b)", "T(b)", "Xi: T(b)", "Xi: T(b)"},
{/* -Fn */ "T(a)", "T(M(a,b))", "T(b)", "T(b)", "T(b)", "T(b)", "Xi: T(b)", "Xi: T(b)"},
{/* -0 */ "T(a)", "T(a)", "T(b)", "T(b)", "T(b)", "T(b)", "Xi: T(b)", "Xi: T(b)"},
{/* +0 */ "T(a)", "T(a)", "T(b)", "T(b)", "T(b)", "T(b)", "Xi: T(b)", "Xi: T(b)"},
{/* +Fn */ "T(a)", "T(a)", "T(a)", "T(a)", "T(M(a,b))", "T(b)", "Xi: T(b)", "Xi: T(b)"},
{/* +inf */ "T(a)", "T(a)", "T(a)", "T(a)", "T(a)", "T(b)", "Xi: T(b)", "Xi: T(b)"},
{/* QNaN */ "Xi: T(b)", "Xi: T(b)", "Xi: T(b)", "Xi: T(b)", "Xi: T(b)", "Xi: T(b)", "Xi: T(b)", "Xi: T(b)"},
{/* SNaN */ "Xi: T(b)", "Xi: T(b)", "Xi: T(b)", "Xi: T(b)", "Xi: T(b)", "Xi: T(b)", "Xi: T(b)", "Xi: T(b)"},
},
},
{
.op = VFMAX,
.m6 = 3,
.m6_desc = "C++ algorithm.max()",
.table = {
/* -inf -Fn -0 +0 +Fn +inf QNaN SNaN */
{/* -inf */ "T(a)", "T(b)", "T(b)", "T(b)", "T(b)", "T(b)", "Xi: T(a)", "Xi: T(a)"},
{/* -Fn */ "T(a)", "T(M(a,b))", "T(b)", "T(b)", "T(b)", "T(b)", "Xi: T(a)", "Xi: T(a)"},
{/* -0 */ "T(a)", "T(a)", "T(a)", "T(a)", "T(b)", "T(b)", "Xi: T(a)", "Xi: T(a)"},
{/* +0 */ "T(a)", "T(a)", "T(a)", "T(a)", "T(b)", "T(b)", "Xi: T(a)", "Xi: T(a)"},
{/* +Fn */ "T(a)", "T(a)", "T(a)", "T(a)", "T(M(a,b))", "T(b)", "Xi: T(a)", "Xi: T(a)"},
{/* +inf */ "T(a)", "T(a)", "T(a)", "T(a)", "T(a)", "T(a)", "Xi: T(a)", "Xi: T(a)"},
{/* QNaN */ "Xi: T(a)", "Xi: T(a)", "Xi: T(a)", "Xi: T(a)", "Xi: T(a)", "Xi: T(a)", "Xi: T(a)", "Xi: T(a)"},
{/* SNaN */ "Xi: T(a)", "Xi: T(a)", "Xi: T(a)", "Xi: T(a)", "Xi: T(a)", "Xi: T(a)", "Xi: T(a)", "Xi: T(a)"},
},
},
{
.op = VFMAX,
.m6 = 4,
.m6_desc = "fmax()",
.table = {
/* -inf -Fn -0 +0 +Fn +inf QNaN SNaN */
{/* -inf */ "T(a)", "T(b)", "T(b)", "T(b)", "T(b)", "T(b)", "T(a)", "Xi: T(a)"},
{/* -Fn */ "T(a)", "T(M(a,b))", "T(b)", "T(b)", "T(b)", "T(b)", "T(a)", "Xi: T(a)"},
{/* -0 */ "T(a)", "T(a)", "T(a)", "T(b)", "T(b)", "T(b)", "T(a)", "Xi: T(a)"},
{/* +0 */ "T(a)", "T(a)", "T(a)", "T(a)", "T(b)", "T(b)", "T(a)", "Xi: T(a)"},
{/* +Fn */ "T(a)", "T(a)", "T(a)", "T(a)", "T(M(a,b))", "T(b)", "T(a)", "Xi: T(a)"},
{/* +inf */ "T(a)", "T(a)", "T(a)", "T(a)", "T(a)", "T(a)", "T(a)", "Xi: T(a)"},
{/* QNaN */ "T(b)", "T(b)", "T(b)", "T(b)", "T(b)", "T(b)", "T(a)", "Xi: T(a)"},
{/* SNaN */ "Xi: T(b)", "Xi: T(b)", "Xi: T(b)", "Xi: T(b)", "Xi: T(b)", "Xi: T(b)", "Xi: T(a)", "Xi: T(a)"},
},
},
};
static void dump_v(FILE *f, const void *v, size_t n)
{
for (int i = 0; i < n; i++) {
fprintf(f, "%02x", ((const unsigned char *)v)[i]);
}
}
static int signed_test(struct signed_test *test, int m4, int m5,
const void *v1_exp, bool xi_exp,
const void *v2, const void *v3)
{
size_t n = (m5 & 8) ? float_sizes[m4 - 2] : 16;
char v1[16];
bool xi;
feclearexcept(FE_ALL_EXCEPT);
vfminmax(test->op, m4, m5, test->m6, v1, v2, v3);
xi = fetestexcept(FE_ALL_EXCEPT) == FE_INVALID;
if (memcmp(v1, v1_exp, n) != 0 || xi != xi_exp) {
fprintf(stderr, "[ FAILED ] %s ", test->m6_desc);
dump_v(stderr, v2, n);
fprintf(stderr, ", ");
dump_v(stderr, v3, n);
fprintf(stderr, ", %d, %d, %d: actual=", m4, m5, test->m6);
dump_v(stderr, v1, n);
fprintf(stderr, "/%d, expected=", (int)xi);
dump_v(stderr, v1_exp, n);
fprintf(stderr, "/%d\n", (int)xi_exp);
return 1;
}
return 0;
}
static void snan_to_qnan(char *v, int m4)
{
size_t bit = 1 + e_bits[m4 - 2];
v[bit / 8] |= 1 << (7 - (bit % 8));
}
int main(void)
{
int ret = 0;
size_t i;
for (i = 0; i < sizeof(signed_tests) / sizeof(signed_tests[0]); i++) {
struct signed_test *test = &signed_tests[i];
int m4;
for (m4 = 2; m4 <= 4; m4++) {
const unsigned char (*floats)[2][16] = signed_floats[m4 - 2];
size_t float_size = float_sizes[m4 - 2];
int m5;
for (m5 = 0; m5 <= 8; m5 += 8) {
char v1_exp[16], v2[16], v3[16];
bool xi_exp = false;
int pos = 0;
int i2;
for (i2 = 0; i2 < N_SIGNED_CLASSES * 2; i2++) {
int i3;
for (i3 = 0; i3 < N_SIGNED_CLASSES * 2; i3++) {
const char *spec = test->table[i2 / 2][i3 / 2];
memcpy(&v2[pos], floats[i2 / 2][i2 % 2], float_size);
memcpy(&v3[pos], floats[i3 / 2][i3 % 2], float_size);
if (strcmp(spec, "T(a)") == 0 ||
strcmp(spec, "Xi: T(a)") == 0) {
memcpy(&v1_exp[pos], &v2[pos], float_size);
} else if (strcmp(spec, "T(b)") == 0 ||
strcmp(spec, "Xi: T(b)") == 0) {
memcpy(&v1_exp[pos], &v3[pos], float_size);
} else if (strcmp(spec, "Xi: T(a*)") == 0) {
memcpy(&v1_exp[pos], &v2[pos], float_size);
snan_to_qnan(&v1_exp[pos], m4);
} else if (strcmp(spec, "Xi: T(b*)") == 0) {
memcpy(&v1_exp[pos], &v3[pos], float_size);
snan_to_qnan(&v1_exp[pos], m4);
} else if (strcmp(spec, "T(M(a,b))") == 0) {
/*
* Comparing floats is risky, since the compiler
* might generate the same instruction that we are
* testing. Compare ints instead. This works,
* because we get here only for +-Fn, and the
* corresponding test values have identical
* exponents.
*/
int v2_int = *(int *)&v2[pos];
int v3_int = *(int *)&v3[pos];
if ((v2_int < v3_int) ==
((test->op == VFMIN) != (v2_int < 0))) {
memcpy(&v1_exp[pos], &v2[pos], float_size);
} else {
memcpy(&v1_exp[pos], &v3[pos], float_size);
}
} else {
fprintf(stderr, "Unexpected spec: %s\n", spec);
return 1;
}
xi_exp |= spec[0] == 'X';
pos += float_size;
if ((m5 & 8) || pos == 16) {
ret |= signed_test(test, m4, m5,
v1_exp, xi_exp, v2, v3);
pos = 0;
xi_exp = false;
}
}
}
if (pos != 0) {
ret |= signed_test(test, m4, m5, v1_exp, xi_exp, v2, v3);
}
}
}
}
return ret;
}
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