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e2k-v9.0.0
qemu-e2k/tests/tcg/s390x/vfminmax.c
Ilya Leoshkevich 23f13e1986 tests/tcg/s390x: test signed vfmin/vfmax 
Add a test to prevent regressions. Try all floating point value sizes
and all combinations of floating point value classes. Verify the results
against PoP tables, which are represented as close to the original as
possible - this produces a lot of checkpatch complaints, but it seems
to be justified in this case.

Signed-off-by: Ilya Leoshkevich <iii@linux.ibm.com>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <20220713182612.3780050-4-iii@linux.ibm.com>
Signed-off-by: Thomas Huth <thuth@redhat.com>
2022-07-19 12:49:56 +02:00

412 lines
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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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