derek.holloway
7502bf64a4
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72 lines
1.8 KiB
C++
72 lines
1.8 KiB
C++
// RUN: %clang_cc1 -emit-llvm -triple i386-linux -std=c++2a -Wno-unknown-pragmas %s -o - | FileCheck %s
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// RUN: %clang_cc1 -emit-llvm -triple i386-linux -fexperimental-new-constant-interpreter -std=c++2a -Wno-unknown-pragmas %s -o - | FileCheck %s
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#pragma STDC FENV_ROUND FE_UPWARD
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float F1u = 1.0F + 0x0.000002p0F;
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float F2u = 1.0F + 0x0.000001p0F;
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float F3u = 0x1.000001p0;
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// CHECK: @F1u = {{.*}} float f0x3F800001
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// CHECK: @F2u = {{.*}} float f0x3F800001
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// CHECK: @F3u = {{.*}} float f0x3F800001
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float FI1u = 0xFFFFFFFFU;
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// CHECK: @FI1u = {{.*}} float f0x4F800000
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#pragma STDC FENV_ROUND FE_DOWNWARD
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float F1d = 1.0F + 0x0.000002p0F;
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float F2d = 1.0F + 0x0.000001p0F;
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float F3d = 0x1.000001p0;
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// CHECK: @F1d = {{.*}} float f0x3F800001
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// CHECK: @F2d = {{.*}} float 1.000000e+00
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// CHECK: @F3d = {{.*}} float 1.000000e+00
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float FI1d = 0xFFFFFFFFU;
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// CHECK: @FI1d = {{.*}} float f0x4F7FFFFF
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// nextUp(1.F) == 0x1.000002p0F
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constexpr float add_round_down(float x, float y) {
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#pragma STDC FENV_ROUND FE_DOWNWARD
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float res = x;
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res = res + y;
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return res;
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}
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constexpr float add_round_up(float x, float y) {
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#pragma STDC FENV_ROUND FE_UPWARD
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float res = x;
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res = res + y;
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return res;
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}
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float V1 = add_round_down(1.0F, 0x0.000001p0F);
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float V2 = add_round_up(1.0F, 0x0.000001p0F);
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// CHECK: @V1 = {{.*}} float 1.000000e+00
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// CHECK: @V2 = {{.*}} float f0x3F800001
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constexpr float add_cast_round_down(float x, double y) {
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#pragma STDC FENV_ROUND FE_DOWNWARD
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float res = x;
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res += y;
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return res;
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}
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constexpr float add_cast_round_up(float x, double y) {
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#pragma STDC FENV_ROUND FE_UPWARD
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float res = x;
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res += y;
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return res;
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}
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float V3 = add_cast_round_down(1.0F, 0x0.000001p0F);
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float V4 = add_cast_round_up(1.0F, 0x0.000001p0F);
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// CHECK: @V3 = {{.*}} float 1.000000e+00
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// CHECK: @V4 = {{.*}} float f0x3F800001
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