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Add 8-bit and 16-bit specialized NEON targets.

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Like SSE4-8 and SSE4-16, these use 8-bit and 16-bit values for mask
elements, respectively, and thus should generate the best code when used
for computation with datatypes of those sizes.
This commit is contained in:
Matt Pharr
2013-07-29 16:14:58 -07:00
parent b6df447b55
commit ab3b633733
12 changed files with 1561 additions and 373 deletions
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41
ispc.cpp
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@@ -106,7 +106,7 @@ static void __cpuidex(int info[4], int level, int count) {
static const char *
lGetSystemISA() {
#ifdef __arm__
return "neon";
return "neon-32";
#else
int info[4];
__cpuid(info, 1);
@@ -187,7 +187,7 @@ Target::Target(const char *arch, const char *cpu, const char *isa, bool pic) :
isa = "avx2";
else if (!strcmp(cpu, "cortex-a9") ||
!strcmp(cpu, "cortex-a15"))
isa = "neon";
isa = "neon-32";
else if (!strcmp(cpu, "core-avx-i"))
isa = "avx1.1";
else if (!strcmp(cpu, "sandybridge") ||
@@ -212,7 +212,7 @@ Target::Target(const char *arch, const char *cpu, const char *isa, bool pic) :
}
#if !defined(__arm__)
if (cpu == NULL && !strcmp(isa, "neon"))
if (cpu == NULL && !strncmp(isa, "neon", 4))
// If we're compiling NEON on an x86 host and the CPU wasn't
// supplied, don't go and set the CPU based on the host...
cpu = "cortex-a9";
@@ -246,7 +246,7 @@ Target::Target(const char *arch, const char *cpu, const char *isa, bool pic) :
this->m_cpu = cpu;
if (arch == NULL) {
if (!strcmp(isa, "neon"))
if (!strncmp(isa, "neon", 4))
arch = "arm";
else
arch = "x86-64";
@@ -461,8 +461,26 @@ Target::Target(const char *arch, const char *cpu, const char *isa, bool pic) :
this->m_hasGather = true;
#endif
}
else if (!strcasecmp(isa, "neon")) {
this->m_isa = Target::NEON;
else if (!strcasecmp(isa, "neon-8")) {
this->m_isa = Target::NEON8;
this->m_nativeVectorWidth = 16;
this->m_vectorWidth = 16;
this->m_attributes = "+neon,+fp16";
this->m_hasHalf = true; // ??
this->m_maskingIsFree = false;
this->m_maskBitCount = 8;
}
else if (!strcasecmp(isa, "neon-16")) {
this->m_isa = Target::NEON16;
this->m_nativeVectorWidth = 8;
this->m_vectorWidth = 8;
this->m_attributes = "+neon,+fp16";
this->m_hasHalf = true; // ??
this->m_maskingIsFree = false;
this->m_maskBitCount = 16;
}
else if (!strcasecmp(isa, "neon-32") || !strcasecmp(isa, "neon")) {
this->m_isa = Target::NEON32;
this->m_nativeVectorWidth = 4;
this->m_vectorWidth = 4;
this->m_attributes = "+neon,+fp16";
@@ -484,7 +502,8 @@ Target::Target(const char *arch, const char *cpu, const char *isa, bool pic) :
llvm::Reloc::Default;
std::string featuresString = m_attributes;
llvm::TargetOptions options;
if (m_isa == Target::NEON)
if (m_isa == Target::NEON8 || m_isa == Target::NEON16 ||
m_isa == Target::NEON32)
options.FloatABIType = llvm::FloatABI::Hard;
#if !defined(LLVM_3_1)
if (g->opt.disableFMA == false)
@@ -618,8 +637,12 @@ Target::GetTripleString() const {
const char *
Target::ISAToString(ISA isa) {
switch (isa) {
case Target::NEON:
return "neon";
case Target::NEON8:
return "neon-8";
case Target::NEON16:
return "neon-16";
case Target::NEON32:
return "neon-32";
case Target::SSE2:
return "sse2";
case Target::SSE4: