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401 results
Show changes
Commits on Source (5)
......@@ -1775,6 +1775,28 @@ AS_IF([test "${enable_altivec}" = "yes"], [
AC_SUBST([ALTIVEC_CFLAGS])
AM_CONDITIONAL([HAVE_ALTIVEC], [test "$have_altivec" = "yes"])
AC_ARG_ENABLE([rvv],
AS_HELP_STRING([--disable-rvv],
[disable RISC-V Vector extension (default auto)]),, [
AS_CASE([${host_cpu}], [riscv*], [enable_rvv="yes"], [enable_rvv="no"])
])
AS_IF([test "${enable_rvv}" != "no"], [
AC_CACHE_CHECK([if $CCAS groks RISC-V V assembly], [ac_cv_riscv_v], [
AC_COMPILE_IFELSE([
AC_LANG_PROGRAM(,[[
asm volatile(".option arch, +v\nvsetvli x0, x0, e8");
]])
], [
ac_cv_riscv_v="yes"
], [
ac_cv_riscv_v="no"
])
])
])
AM_CONDITIONAL([HAVE_RVV], [test "${ac_cv_riscv_v}" = "yes"])
dnl
dnl Memory usage
dnl
......
......@@ -197,6 +197,18 @@ unsigned vlc_CPU_raw(void);
# elif defined (__mips_hard_float)
# define HAVE_FPU 1
# elif defined (__riscv)
# ifdef __riscv_flen
# define HAVE_FPU 1
# endif
# define VLC_CPU_RV_V 0x1
# ifdef __riscv_v
# define vlc_CPU_RV_V() (1)
# else
# define vlc_CPU_RV_V() ((vlc_CPU() & VLC_CPU_RV_V) != 0)
# endif
# else
/**
* Are single precision floating point operations "fast"?
......
......@@ -29,14 +29,74 @@
#undef CPU_FLAGS
#if defined (__arm__) || defined (__aarch64__)
# define CPU_FLAGS "Features\t:"
# define CPU_FLAGS "Features"
#elif defined (__i386__) || defined (__x86_64__)
# define CPU_FLAGS "flags\t\t:"
# define CPU_FLAGS "flags"
#elif defined (__powerpc__) || defined (__powerpc64__)
# define CPU_FLAGS "cpu\t\t:"
# define CPU_FLAGS "cpu"
#elif defined (__riscv)
# include <vlc_strings.h>
# define CPU_FLAGS "isa"
static unsigned vlc_CPU_RV_isa_parse(const char *isa)
{
unsigned caps = 0;
int c;
if (vlc_ascii_tolower((unsigned char)isa[0]) != 'r'
|| vlc_ascii_tolower((unsigned char)isa[1]) != 'v')
return 0;
isa += 2;
if (strncmp(isa, "32", 2) == 0 || strncmp(isa, "64", 2) == 0)
isa += 2;
else if (strncmp(isa, "128", 3) == 0)
isa += 3;
else
return 0;
while ((c = vlc_ascii_tolower((unsigned char)*isa)) != '\0') {
size_t extlen = 1;
switch (c) {
case '_':
break;
case 'z':
case 's':
case 'h':
case 'x':
extlen = 1 + strcspn(isa + 1, "_");
break;
default:
if (((unsigned)(c - 'a')) > 'y')
return 0;
while (isa[extlen] && ((unsigned)(isa[extlen] - '0')) < 10)
extlen++;
if (vlc_ascii_tolower(isa[extlen]) == 'p') {
extlen++;
while (isa[extlen] && ((unsigned)(isa[extlen] - '0')) < 10)
extlen++;
}
}
/* TODO: Zve extensions */
if (c == 'v')
caps |= VLC_CPU_RV_V;
isa += extlen;
}
return caps;
}
#endif
#ifdef CPU_FLAGS
......@@ -52,7 +112,7 @@ unsigned vlc_CPU_raw(void)
while (getline (&line, &linelen, info) != -1)
{
char *p = line, *cap;
char *p, *cap;
uint_fast32_t core_caps = 0;
#if defined (__arm__)
......@@ -63,6 +123,15 @@ unsigned vlc_CPU_raw(void)
if (strncmp (line, CPU_FLAGS, strlen (CPU_FLAGS)))
continue;
p = line + strlen(CPU_FLAGS);
p += strspn(p, "\t");
if (*p != ':')
continue;
#if defined (__riscv)
p += strspn(p, "\t ");
core_caps = vlc_CPU_RV_isa_parse(p);
#else
while ((cap = strsep (&p, " ")) != NULL)
{
#if defined (__arm__) || defined (__aarch64__)
......@@ -106,6 +175,7 @@ unsigned vlc_CPU_raw(void)
core_caps |= VLC_CPU_ALTIVEC;
#endif
}
#endif
/* Take the intersection of capabilities of each processor */
all_caps &= core_caps;
......
......@@ -293,6 +293,10 @@ void vlc_CPU_dump (vlc_object_t *obj)
if (vlc_CPU_ARM_NEON())
vlc_memstream_puts(&stream, "ARM_NEON ");
#elif defined (__riscv)
if (vlc_CPU_RV_V())
vlc_memstream_puts(&stream, "V ");
#endif
#if HAVE_FPU
......