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R600: Fix FROUND

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round halfway cases away from zero

Signed-off-by: Jan Vesely <jan.vesely@rutgers.edu>
Reviewed-by: Tom Stellard <tom@stellard.net>

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@217250 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Jan Vesely 2014-09-05 14:26:54 +00:00
parent eb1fef0ec1
commit 286f644bce
3 changed files with 15 additions and 10 deletions
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2
lib/Target/R600/EvergreenInstructions.td
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@ -537,7 +537,7 @@ def : Pat<(fp_to_uint f32:$src0), (FLT_TO_UINT_eg (TRUNC $src0))>;
// SHA-256 Patterns
def : SHA256MaPattern <BFI_INT_eg, XOR_INT>;
def : FROUNDPat <CNDGE_eg>;
def : FROUNDPat <CNDGE_eg, CNDGT_eg>;
def EG_ExportSwz : ExportSwzInst {
let Word1{19-16} = 0; // BURST_COUNT

9
lib/Target/R600/R600Instructions.td
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@ -1141,9 +1141,12 @@ class TGSI_LIT_Z_Common <InstR600 mul_lit, InstR600 log_clamped, InstR600 exp_ie
>;
// FROUND pattern
class FROUNDPat<Instruction CNDGE> : Pat <
class FROUNDPat<Instruction CNDGE, Instruction CNDGT> : Pat <
(AMDGPUround f32:$x),
(CNDGE (ADD (FNEG_R600 (f32 HALF)), (FRACT $x)), (CEIL $x), (FLOOR $x))
(CNDGE $x,
(CNDGE (ADD (FNEG_R600 (f32 HALF)), (FRACT $x)), (CEIL $x), (FLOOR $x)),
(CNDGT (ADD (FNEG_R600 (f32 HALF)), (FRACT $x)), (CEIL $x), (FLOOR $x))
)
>;
@ -1190,7 +1193,7 @@ let Predicates = [isR600] in {
def : Pat<(fsqrt f32:$src), (MUL $src, (RECIPSQRT_CLAMPED_r600 $src))>;
defm : RsqPat<RECIPSQRT_IEEE_r600, f32>;
def : FROUNDPat <CNDGE_r600>;
def : FROUNDPat <CNDGE_r600, CNDGT_r600>;
def R600_ExportSwz : ExportSwzInst {
let Word1{20-17} = 0; // BURST_COUNT

14
test/CodeGen/R600/llvm.round.ll
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@ -1,11 +1,13 @@
; RUN: llc < %s -march=r600 -mcpu=redwood | FileCheck %s --check-prefix=R600 --check-prefix=FUNC
; RUN: llc -march=r600 -mcpu=redwood < %s | FileCheck %s --check-prefix=R600 --check-prefix=FUNC
; FUNC-LABEL: @f32
; R600: FRACT
; R600-DAG: ADD
; R600-DAG: CEIL
; R600-DAG: FLOOR
; R600: CNDGE
; R600: FRACT {{.*}}, [[ARG:KC[0-9]\[[0-9]+\]\.[XYZW]]]
; R600-DAG: ADD {{.*}}, -0.5
; R600-DAG: CEIL {{.*}} [[ARG]]
; R600-DAG: FLOOR {{.*}} [[ARG]]
; R600-DAG: CNDGE
; R600-DAG: CNDGT
; R600: CNDGE {{[^,]+}}, [[ARG]]
define void @f32(float addrspace(1)* %out, float %in) {
entry:
%0 = call float @llvm.round.f32(float %in)