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[AVX512]: disable Transcendentals and Trigonometry

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This commit is contained in:
Vsevolod Livinskiy
2015-05-07 16:10:18 +03:00
committed by Anton Mitrokhin
parent ef9c98fba8
commit 3514e03327
2 changed files with 20 additions and 10 deletions
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24
builtins/target-avx512-common.ll
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@@ -105,13 +105,25 @@ define i16 @__float_to_half_uniform(float %v) nounwind readnone {
}
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;; math
;; fast math mode
declare void @llvm.x86.sse.stmxcsr(i8 *) nounwind
declare void @llvm.x86.sse.ldmxcsr(i8 *) nounwind
define void @__fastmath() nounwind alwaysinline {
%ptr = alloca i32
%ptr8 = bitcast i32 * %ptr to i8 *
call void @llvm.x86.sse.stmxcsr(i8 * %ptr8)
%oldval = load PTR_OP_ARGS(`i32 ') %ptr
; turn on DAZ (64)/FTZ (32768) -> 32832
%update = or i32 %oldval, 32832
store i32 %update, i32 *%ptr
call void @llvm.x86.sse.ldmxcsr(i8 * %ptr8)
ret void
}
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;; rounding floats
declare void @__fastmath() nounwind
;; round/floor/ceil
declare <4 x float> @llvm.x86.sse41.round.ss(<4 x float>, <4 x float>, i32) nounwind readnone
@@ -815,5 +827,3 @@ declare_nvptx()
rsqrtd_decl()
rcpd_decl()
transcendetals_decl()
trigonometry_decl()

6
ispc.cpp
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@@ -893,10 +893,10 @@ Target::Target(const char *arch, const char *cpu, const char *isa, bool pic, boo
this->m_hasHalf = true;
this->m_hasRand = true;
this->m_hasGather = this->m_hasScatter = true;
this->m_hasTranscendentals = true;
this->m_hasTranscendentals = false;
// For MIC it is set to true due to performance reasons. The option should be tested.
this->m_hasTrigonometry = true;
this->m_hasRsqrtd = this->m_hasRcpd = true;
this->m_hasTrigonometry = false;
this->m_hasRsqrtd = this->m_hasRcpd = false;
this->m_hasVecPrefetch = true;
CPUfromISA = CPU_KNL;
}