forked from OSchip/llvm-project
284 lines
14 KiB
C
284 lines
14 KiB
C
// RUN: %clang_cc1 -ffixed-point -S -emit-llvm %s -o - | FileCheck %s -check-prefix=DEFAULT
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// RUN: %clang_cc1 -ffixed-point -S -emit-llvm %s -o - -fpadding-on-unsigned-fixed-point | FileCheck %s -check-prefix=SAME
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void TestFixedPointCastSameType() {
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_Accum a = 2.5k;
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_Accum a2 = a;
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// DEFAULT: [[ACCUM:%[0-9a-z]+]] = load i32, i32* %a, align 4
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// DEFAULT-NEXT: store i32 [[ACCUM]], i32* %a2, align 4
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a2 = (_Accum)a;
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// DEFAULT: [[ACCUM:%[0-9a-z]+]] = load i32, i32* %a, align 4
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// DEFAULT-NEXT: store i32 [[ACCUM]], i32* %a2, align 4
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}
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void TestFixedPointCastDown() {
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long _Accum la = 2.5lk;
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_Accum a = la;
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// DEFAULT: [[LACCUM:%[0-9a-z]+]] = load i64, i64* %la, align 8
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// DEFAULT-NEXT: [[ACCUM_AS_I64:%[0-9a-z]+]] = ashr i64 [[LACCUM]], 16
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// DEFAULT-NEXT: [[ACCUM:%[0-9a-z]+]] = trunc i64 [[ACCUM_AS_I64]] to i32
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// DEFAULT-NEXT: store i32 [[ACCUM]], i32* %a, align 4
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a = (_Accum)la;
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// DEFAULT: [[LACCUM:%[0-9a-z]+]] = load i64, i64* %la, align 8
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// DEFAULT-NEXT: [[ACCUM_AS_I64:%[0-9a-z]+]] = ashr i64 [[LACCUM]], 16
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// DEFAULT-NEXT: [[ACCUM:%[0-9a-z]+]] = trunc i64 [[ACCUM_AS_I64]] to i32
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// DEFAULT-NEXT: store i32 [[ACCUM]], i32* %a, align 4
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short _Accum sa = a;
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// DEFAULT: [[ACCUM:%[0-9a-z]+]] = load i32, i32* %a, align 4
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// DEFAULT-NEXT: [[SACCUM_AS_I32:%[0-9a-z]+]] = ashr i32 [[ACCUM]], 8
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// DEFAULT-NEXT: [[SACCUM:%[0-9a-z]+]] = trunc i32 [[SACCUM_AS_I32]] to i16
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// DEFAULT-NEXT: store i16 [[SACCUM]], i16* %sa, align 2
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sa = (short _Accum)a;
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// DEFAULT: [[ACCUM:%[0-9a-z]+]] = load i32, i32* %a, align 4
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// DEFAULT-NEXT: [[SACCUM_AS_I32:%[0-9a-z]+]] = ashr i32 [[ACCUM]], 8
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// DEFAULT-NEXT: [[SACCUM:%[0-9a-z]+]] = trunc i32 [[SACCUM_AS_I32]] to i16
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// DEFAULT-NEXT: store i16 [[SACCUM]], i16* %sa, align 2
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}
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void TestFixedPointCastUp() {
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short _Accum sa = 2.5hk;
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_Accum a = sa;
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// DEFAULT: [[SACCUM:%[0-9a-z]+]] = load i16, i16* %sa, align 2
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// DEFAULT-NEXT: [[SACCUM_BUFF:%[0-9a-z]+]] = sext i16 [[SACCUM]] to i32
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// DEFAULT-NEXT: [[ACCUM:%[0-9a-z]+]] = shl i32 [[SACCUM_BUFF]], 8
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// DEFAULT-NEXT: store i32 [[ACCUM]], i32* %a, align 4
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long _Accum la = a;
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// DEFAULT: [[ACCUM:%[0-9a-z]+]] = load i32, i32* %a, align 4
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// DEFAULT-NEXT: [[ACCUM_BUFF:%[0-9a-z]+]] = sext i32 [[ACCUM]] to i64
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// DEFAULT-NEXT: [[LACCUM:%[0-9a-z]+]] = shl i64 [[ACCUM_BUFF]], 16
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// DEFAULT-NEXT: store i64 [[LACCUM]], i64* %la, align 8
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a = (_Accum)sa;
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// DEFAULT: [[SACCUM:%[0-9a-z]+]] = load i16, i16* %sa, align 2
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// DEFAULT-NEXT: [[SACCUM_BUFF:%[0-9a-z]+]] = sext i16 [[SACCUM]] to i32
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// DEFAULT-NEXT: [[ACCUM:%[0-9a-z]+]] = shl i32 [[SACCUM_BUFF]], 8
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// DEFAULT-NEXT: store i32 [[ACCUM]], i32* %a, align 4
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la = (long _Accum)a;
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// DEFAULT: [[ACCUM:%[0-9a-z]+]] = load i32, i32* %a, align 4
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// DEFAULT-NEXT: [[ACCUM_BUFF:%[0-9a-z]+]] = sext i32 [[ACCUM]] to i64
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// DEFAULT-NEXT: [[LACCUM:%[0-9a-z]+]] = shl i64 [[ACCUM_BUFF]], 16
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// DEFAULT-NEXT: store i64 [[LACCUM]], i64* %la, align 8
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}
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void TestFixedPointCastSignedness() {
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_Accum a = 2.5k;
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unsigned _Accum ua = a;
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// DEFAULT: [[ACCUM:%[0-9a-z]+]] = load i32, i32* %a, align 4
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// DEFAULT-NEXT: [[UACCUM:%[0-9a-z]+]] = shl i32 [[ACCUM]], 1
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// DEFAULT-NEXT: store i32 [[UACCUM]], i32* %ua, align 4
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// SAME: TestFixedPointCastSignedness
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// SAME: [[ACCUM:%[0-9a-z]+]] = load i32, i32* %a, align 4
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// SAME-NEXT: store i32 [[ACCUM]], i32* %ua, align 4
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a = ua;
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// DEFAULT: [[UACCUM:%[0-9a-z]+]] = load i32, i32* %ua, align 4
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// DEFAULT-NEXT: [[ACCUM:%[0-9a-z]+]] = lshr i32 [[UACCUM]], 1
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// DEFAULT-NEXT: store i32 [[ACCUM]], i32* %a, align 4
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// SAME: [[ACCUM:%[0-9a-z]+]] = load i32, i32* %ua, align 4
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// SAME-NEXT: store i32 [[ACCUM]], i32* %a, align 4
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ua = (unsigned _Accum)a;
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// DEFAULT: [[ACCUM:%[0-9a-z]+]] = load i32, i32* %a, align 4
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// DEFAULT-NEXT: [[UACCUM:%[0-9a-z]+]] = shl i32 [[ACCUM]], 1
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// DEFAULT-NEXT: store i32 [[UACCUM]], i32* %ua, align 4
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a = (_Accum)ua;
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// DEFAULT: [[UACCUM:%[0-9a-z]+]] = load i32, i32* %ua, align 4
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// DEFAULT-NEXT: [[ACCUM:%[0-9a-z]+]] = lshr i32 [[UACCUM]], 1
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// DEFAULT-NEXT: store i32 [[ACCUM]], i32* %a, align 4
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_Accum a2;
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unsigned long _Accum ula = a2;
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// DEFAULT: [[ACCUM:%[0-9a-z]+]] = load i32, i32* %a2, align 4
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// DEFAULT-NEXT: [[ACCUM_EXT:%[0-9a-z]+]] = sext i32 [[ACCUM]] to i64
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// DEFAULT-NEXT: [[LACCUM:%[0-9a-z]+]] = shl i64 [[ACCUM_EXT]], 17
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// DEFAULT-NEXT: store i64 [[LACCUM]], i64* %ula, align 8
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// SAME: [[ACCUM:%[0-9a-z]+]] = load i32, i32* %a2, align 4
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// SAME-NEXT: [[ACCUM_EXT:%[0-9a-z]+]] = sext i32 [[ACCUM]] to i64
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// SAME-NEXT: [[LACCUM:%[0-9a-z]+]] = shl i64 [[ACCUM_EXT]], 16
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// SAME-NEXT: store i64 [[LACCUM]], i64* %ula, align 8
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}
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void TestFixedPointCastSaturation() {
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_Accum a;
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_Sat short _Accum sat_sa;
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_Sat _Accum sat_a;
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_Sat long _Accum sat_la;
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_Sat unsigned short _Accum sat_usa;
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_Sat unsigned _Accum sat_ua;
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_Sat unsigned long _Accum sat_ula;
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_Sat short _Fract sat_sf;
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_Sat _Fract sat_f;
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_Sat long _Fract sat_lf;
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// Casting down between types
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sat_sa = sat_a;
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// DEFAULT: [[OLD_ACCUM:%[0-9a-z]+]] = load i32, i32* %sat_a, align 4
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// DEFAULT-NEXT: [[ACCUM:%[0-9a-z]+]] = ashr i32 [[OLD_ACCUM]], 8
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// DEFAULT-NEXT: [[USE_MAX:%[0-9a-z]+]] = icmp sgt i32 [[ACCUM]], 32767
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// DEFAULT-NEXT: [[RESULT:%[0-9a-z]+]] = select i1 [[USE_MAX]], i32 32767, i32 [[ACCUM]]
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// DEFAULT-NEXT: [[USE_MIN:%[0-9a-z]+]] = icmp slt i32 [[RESULT]], -32768
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// DEFAULT-NEXT: [[RESULT2:%[0-9a-z]+]] = select i1 [[USE_MIN]], i32 -32768, i32 [[RESULT]]
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// DEFAULT-NEXT: [[RESULT_TRUNC:%[0-9a-z]+]] = trunc i32 [[RESULT2]] to i16
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// DEFAULT-NEXT: store i16 [[RESULT_TRUNC]], i16* %sat_sa, align 2
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// Accum to Fract, decreasing scale
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sat_sf = sat_a;
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// DEFAULT: [[OLD_ACCUM:%[0-9a-z]+]] = load i32, i32* %sat_a, align 4
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// DEFAULT-NEXT: [[FRACT:%[0-9a-z]+]] = ashr i32 [[OLD_ACCUM]], 8
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// DEFAULT-NEXT: [[USE_MAX:%[0-9a-z]+]] = icmp sgt i32 [[FRACT]], 127
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// DEFAULT-NEXT: [[RESULT:%[0-9a-z]+]] = select i1 [[USE_MAX]], i32 127, i32 [[FRACT]]
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// DEFAULT-NEXT: [[USE_MIN:%[0-9a-z]+]] = icmp slt i32 [[RESULT]], -128
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// DEFAULT-NEXT: [[RESULT2:%[0-9a-z]+]] = select i1 [[USE_MIN]], i32 -128, i32 [[RESULT]]
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// DEFAULT-NEXT: [[RESULT_TRUNC:%[0-9a-z]+]] = trunc i32 [[RESULT2]] to i8
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// DEFAULT-NEXT: store i8 [[RESULT_TRUNC]], i8* %sat_sf, align 1
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// Accum to Fract, same scale
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sat_f = a;
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// DEFAULT: [[ACCUM:%[0-9a-z]+]] = load i32, i32* %a, align 4
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// DEFAULT-NEXT: [[USE_MAX:%[0-9a-z]+]] = icmp sgt i32 [[ACCUM]], 32767
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// DEFAULT-NEXT: [[RESULT:%[0-9a-z]+]] = select i1 [[USE_MAX]], i32 32767, i32 [[ACCUM]]
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// DEFAULT-NEXT: [[USE_MIN:%[0-9a-z]+]] = icmp slt i32 [[RESULT]], -32768
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// DEFAULT-NEXT: [[RESULT2:%[0-9a-z]+]] = select i1 [[USE_MIN]], i32 -32768, i32 [[RESULT]]
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// DEFAULT-NEXT: [[RESULT_TRUNC:%[0-9a-z]+]] = trunc i32 [[RESULT2]] to i16
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// DEFAULT-NEXT: store i16 [[RESULT_TRUNC]], i16* %sat_f, align 2
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// Accum to Fract, increasing scale
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sat_lf = sat_a;
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// DEFAULT: [[OLD_ACCUM:%[0-9a-z]+]] = load i32, i32* %sat_a, align 4
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// DEFAULT-NEXT: [[ACCUM:%[0-9a-z]+]] = sext i32 [[OLD_ACCUM]] to i48
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// DEFAULT-NEXT: [[FRACT:%[0-9a-z]+]] = shl i48 [[ACCUM]], 16
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// DEFAULT-NEXT: [[USE_MAX:%[0-9a-z]+]] = icmp sgt i48 [[FRACT]], 2147483647
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// DEFAULT-NEXT: [[RESULT:%[0-9a-z]+]] = select i1 [[USE_MAX]], i48 2147483647, i48 [[FRACT]]
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// DEFAULT-NEXT: [[USE_MIN:%[0-9a-z]+]] = icmp slt i48 [[RESULT]], -2147483648
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// DEFAULT-NEXT: [[RESULT2:%[0-9a-z]+]] = select i1 [[USE_MIN]], i48 -2147483648, i48 [[RESULT]]
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// DEFAULT-NEXT: [[RESULT_TRUNC:%[0-9a-z]+]] = trunc i48 [[RESULT2]] to i32
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// DEFAULT-NEXT: store i32 [[RESULT_TRUNC]], i32* %sat_lf, align 4
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// Signed to unsigned, decreasing scale
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_Sat _Accum sat_a2;
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sat_usa = sat_a2;
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// DEFAULT: [[OLD_ACCUM:%[0-9a-z]+]] = load i32, i32* %sat_a2, align 4
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// DEFAULT-NEXT: [[ACCUM:%[0-9a-z]+]] = ashr i32 [[OLD_ACCUM]], 7
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// DEFAULT-NEXT: [[USE_MAX:%[0-9a-z]+]] = icmp sgt i32 [[ACCUM]], 65535
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// DEFAULT-NEXT: [[RESULT:%[0-9a-z]+]] = select i1 [[USE_MAX]], i32 65535, i32 [[ACCUM]]
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// DEFAULT-NEXT: [[USE_MIN:%[0-9a-z]+]] = icmp slt i32 [[RESULT]], 0
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// DEFAULT-NEXT: [[RESULT2:%[0-9a-z]+]] = select i1 [[USE_MIN]], i32 0, i32 [[RESULT]]
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// DEFAULT-NEXT: [[RESULT_TRUNC:%[0-9a-z]+]] = trunc i32 [[RESULT2]] to i16
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// DEFAULT-NEXT: store i16 [[RESULT_TRUNC]], i16* %sat_usa, align 2
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// SAME: [[OLD_ACCUM:%[0-9a-z]+]] = load i32, i32* %sat_a2, align 4
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// SAME-NEXT: [[ACCUM:%[0-9a-z]+]] = ashr i32 [[OLD_ACCUM]], 8
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// SAME-NEXT: [[USE_MAX:%[0-9a-z]+]] = icmp sgt i32 [[ACCUM]], 32767
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// SAME-NEXT: [[RESULT:%[0-9a-z]+]] = select i1 [[USE_MAX]], i32 32767, i32 [[ACCUM]]
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// SAME-NEXT: [[USE_MIN:%[0-9a-z]+]] = icmp slt i32 [[RESULT]], 0
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// SAME-NEXT: [[RESULT2:%[0-9a-z]+]] = select i1 [[USE_MIN]], i32 0, i32 [[RESULT]]
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// SAME-NEXT: [[RESULT_TRUNC:%[0-9a-z]+]] = trunc i32 [[RESULT2]] to i16
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// SAME-NEXT: store i16 [[RESULT_TRUNC]], i16* %sat_usa, align 2
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// Signed to unsigned, increasing scale
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sat_ua = sat_a;
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// DEFAULT: [[OLD_ACCUM:%[0-9a-z]+]] = load i32, i32* %sat_a, align 4
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// DEFAULT-NEXT: [[ACCUM_EXT:%[0-9a-z]+]] = sext i32 [[OLD_ACCUM]] to i33
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// DEFAULT-NEXT: [[ACCUM:%[0-9a-z]+]] = shl i33 [[ACCUM_EXT]], 1
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// DEFAULT-NEXT: [[USE_MIN:%[0-9a-z]+]] = icmp slt i33 [[ACCUM]], 0
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// DEFAULT-NEXT: [[RESULT2:%[0-9a-z]+]] = select i1 [[USE_MIN]], i33 0, i33 [[ACCUM]]
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// DEFAULT-NEXT: [[RESULT_TRUNC:%[0-9a-z]+]] = trunc i33 [[RESULT2]] to i32
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// DEFAULT-NEXT: store i32 [[RESULT_TRUNC]], i32* %sat_ua, align 4
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// SAME: [[ACCUM:%[0-9a-z]+]] = load i32, i32* %sat_a, align 4
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// SAME-NEXT: [[USE_MIN:%[0-9a-z]+]] = icmp slt i32 [[ACCUM]], 0
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// SAME-NEXT: [[RESULT:%[0-9a-z]+]] = select i1 [[USE_MIN]], i32 0, i32 [[ACCUM]]
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// SAME-NEXT: store i32 [[RESULT]], i32* %sat_ua, align 4
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// Nothing when saturating to the same type and size
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sat_a = a;
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// DEFAULT: [[ACCUM:%[0-9a-z]+]] = load i32, i32* %a, align 4
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// DEFAULT-NEXT: store i32 [[ACCUM]], i32* %sat_a, align 4
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// Nothing when assigning back
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a = sat_a;
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// DEFAULT: [[SAT_ACCUM:%[0-9a-z]+]] = load i32, i32* %sat_a, align 4
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// DEFAULT-NEXT: store i32 [[SAT_ACCUM]], i32* %a, align 4
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// No overflow when casting from fract to signed accum
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sat_a = sat_f;
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// DEFAULT: [[FRACT:%[0-9a-z]+]] = load i16, i16* %sat_f, align 2
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// DEFAULT-NEXT: [[FRACT_EXT:%[0-9a-z]+]] = sext i16 [[FRACT]] to i32
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// DEFAULT-NEXT: store i32 [[FRACT_EXT]], i32* %sat_a, align 4
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// Only get overflow checking if signed fract to unsigned accum
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sat_ua = sat_sf;
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// DEFAULT: [[FRACT:%[0-9a-z]+]] = load i8, i8* %sat_sf, align 1
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// DEFAULT-NEXT: [[FRACT_EXT:%[0-9a-z]+]] = sext i8 [[FRACT]] to i17
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// DEFAULT-NEXT: [[ACCUM:%[0-9a-z]+]] = shl i17 [[FRACT_EXT]], 9
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// DEFAULT-NEXT: [[IS_NEG:%[0-9a-z]+]] = icmp slt i17 [[ACCUM]], 0
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// DEFAULT-NEXT: [[RESULT:%[0-9a-z]+]] = select i1 [[IS_NEG]], i17 0, i17 [[ACCUM]]
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// DEFAULT-NEXT: [[RESULT_EXT:%[0-9a-z]+]] = sext i17 [[RESULT]] to i32
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// DEFAULT-NEXT: store i32 [[RESULT_EXT]], i32* %sat_ua, align 4
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// SAME: [[FRACT:%[0-9a-z]+]] = load i8, i8* %sat_sf, align 1
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// SAME-NEXT: [[FRACT_EXT:%[0-9a-z]+]] = sext i8 [[FRACT]] to i16
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// SAME-NEXT: [[ACCUM:%[0-9a-z]+]] = shl i16 [[FRACT_EXT]], 8
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// SAME-NEXT: [[IS_NEG:%[0-9a-z]+]] = icmp slt i16 [[ACCUM]], 0
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// SAME-NEXT: [[RESULT:%[0-9a-z]+]] = select i1 [[IS_NEG]], i16 0, i16 [[ACCUM]]
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// SAME-NEXT: [[RESULT_EXT:%[0-9a-z]+]] = sext i16 [[RESULT]] to i32
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// SAME-NEXT: store i32 [[RESULT_EXT]], i32* %sat_ua, align 4
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}
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void TestFixedPointCastBetFractAccum() {
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short _Accum sa;
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_Accum a;
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long _Accum la;
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short _Fract sf;
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_Fract f;
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long _Fract lf;
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unsigned _Accum ua;
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unsigned _Fract uf;
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// To lower scale
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sf = a;
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// DEFAULT: [[ACCUM:%[0-9a-z]+]] = load i32, i32* %a, align 4
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// DEFAULT-NEXT: [[FRACT:%[0-9a-z]+]] = ashr i32 [[ACCUM]], 8
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// DEFAULT-NEXT: [[FRACT_TRUNC:%[0-9a-z]+]] = trunc i32 [[FRACT]] to i8
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// DEFAULT-NEXT: store i8 [[FRACT_TRUNC]], i8* %sf, align 1
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// To higher scale
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a = sf;
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// DEFAULT: [[FRACT:%[0-9a-z]+]] = load i8, i8* %sf, align 1
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// DEFAULT-NEXT: [[FRACT_EXT:%[0-9a-z]+]] = sext i8 [[FRACT]] to i32
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// DEFAULT-NEXT: [[ACCUM:%[0-9a-z]+]] = shl i32 [[FRACT_EXT]], 8
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// DEFAULT-NEXT: store i32 [[ACCUM]], i32* %a, align 4
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// To same scale
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f = a;
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// DEFAULT: [[ACCUM:%[0-9a-z]+]] = load i32, i32* %a, align 4
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// DEFAULT-NEXT: [[FRACT:%[0-9a-z]+]] = trunc i32 [[ACCUM]] to i16
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// DEFAULT-NEXT: store i16 [[FRACT]], i16* %f, align 2
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a = f;
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// DEFAULT: [[FRACT:%[0-9a-z]+]] = load i16, i16* %f, align 2
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// DEFAULT-NEXT: [[ACCUM:%[0-9a-z]+]] = sext i16 [[FRACT]] to i32
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// DEFAULT-NEXT: store i32 [[ACCUM]], i32* %a, align 4
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// To unsigned
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ua = uf;
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// DEFAULT: [[FRACT:%[0-9a-z]+]] = load i16, i16* %uf, align 2
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// DEFAULT-NEXT: [[ACCUM:%[0-9a-z]+]] = zext i16 [[FRACT]] to i32
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// DEFAULT-NEXT: store i32 [[ACCUM]], i32* %ua, align 4
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// SAME: [[FRACT:%[0-9a-z]+]] = load i16, i16* %uf, align 2
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// SAME-NEXT: [[ACCUM:%[0-9a-z]+]] = zext i16 [[FRACT]] to i32
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// SAME-NEXT: store i32 [[ACCUM]], i32* %ua, align 4
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uf = ua;
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// DEFAULT: [[FRACT:%[0-9a-z]+]] = load i32, i32* %ua, align 4
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// DEFAULT-NEXT: [[ACCUM:%[0-9a-z]+]] = trunc i32 [[FRACT]] to i16
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// DEFAULT-NEXT: store i16 [[ACCUM]], i16* %uf, align 2
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// SAME: [[FRACT:%[0-9a-z]+]] = load i32, i32* %ua, align 4
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// SAME-NEXT: [[ACCUM:%[0-9a-z]+]] = trunc i32 [[FRACT]] to i16
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// SAME-NEXT: store i16 [[ACCUM]], i16* %uf, align 2
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}
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