diff options
| author | Leonard Chan <leonardchan@google.com> | 2018-08-06 16:42:37 +0000 |
|---|---|---|
| committer | Leonard Chan <leonardchan@google.com> | 2018-08-06 16:42:37 +0000 |
| commit | a677942d8a958576f56cacc41b1ec11744e626f3 (patch) | |
| tree | e4a6d5f2173efd5813d3b8a682b18ab2cc69ceb6 /clang/test/Frontend/fixed_point_declarations.c | |
| parent | a489d1115887067370e23a3b5d4af7a42c81aa0c (diff) | |
| download | bcm5719-llvm-a677942d8a958576f56cacc41b1ec11744e626f3.tar.gz bcm5719-llvm-a677942d8a958576f56cacc41b1ec11744e626f3.zip | |
[Fixed Point Arithmetic] Fixed Point Constant
This patch proposes an abstract type that represents fixed point numbers, similar to APInt or APSInt that was discussed in https://reviews.llvm.org/D48456#inline-425585. This type holds a value, scale, and saturation and is meant to perform intermediate calculations on constant fixed point values.
Currently this class is used as a way for handling the conversions between fixed point numbers with different sizes and radixes. For example, if I'm casting from a signed _Accum to a saturated unsigned short _Accum, I will need to check the value of the signed _Accum to see if it fits into the short _Accum which involves getting and comparing against the max/min values of the short _Accum. The FixedPointNumber class currently handles the radix shifting and extension when converting to a signed _Accum.
Differential Revision: https://reviews.llvm.org/D48661
llvm-svn: 339028
Diffstat (limited to 'clang/test/Frontend/fixed_point_declarations.c')
| -rw-r--r-- | clang/test/Frontend/fixed_point_declarations.c | 16 |
1 files changed, 15 insertions, 1 deletions
diff --git a/clang/test/Frontend/fixed_point_declarations.c b/clang/test/Frontend/fixed_point_declarations.c index 5df54f38d7f..04ed25d227c 100644 --- a/clang/test/Frontend/fixed_point_declarations.c +++ b/clang/test/Frontend/fixed_point_declarations.c @@ -1,5 +1,4 @@ // RUN: %clang -ffixed-point -S -emit-llvm %s -o - --target=x86_64-linux | FileCheck %s -// RUN: %clang -ffixed-point -S -emit-llvm %s -o - --target=x86_64-scei-ps4-ubuntu-fast | FileCheck %s // Primary fixed point types signed short _Accum s_short_accum; // CHECK-DAG: @s_short_accum = {{.*}}global i16 0, align 2 @@ -111,3 +110,18 @@ long _Fract long_fract_eps = 0x1p-31lr; // CHECK-DAG: @long_ unsigned short _Fract u_short_fract_eps = 0x1p-8uhr; // CHECK-DAG: @u_short_fract_eps = {{.*}}global i8 1, align 1 unsigned _Fract u_fract_eps = 0x1p-16ur; // CHECK-DAG: @u_fract_eps = {{.*}}global i16 1, align 2 unsigned long _Fract u_long_fract_eps = 0x1p-32ulr; // CHECK-DAG: @u_long_fract_eps = {{.*}}global i32 1, align 4 + +// Zero +short _Accum short_accum_zero = 0.0hk; // CHECK-DAG: @short_accum_zero = {{.*}}global i16 0, align 2 + _Accum accum_zero = 0.0k; // CHECK-DAG: @accum_zero = {{.*}}global i32 0, align 4 +long _Accum long_accum_zero = 0.0lk; // CHECK-DAG: @long_accum_zero = {{.*}}global i64 0, align 8 +unsigned short _Accum u_short_accum_zero = 0.0uhk; // CHECK-DAG: @u_short_accum_zero = {{.*}}global i16 0, align 2 +unsigned _Accum u_accum_zero = 0.0uk; // CHECK-DAG: @u_accum_zero = {{.*}}global i32 0, align 4 +unsigned long _Accum u_long_accum_zero = 0.0ulk; // CHECK-DAG: @u_long_accum_zero = {{.*}}global i64 0, align 8 + +short _Fract short_fract_zero = 0.0hr; // CHECK-DAG: @short_fract_zero = {{.*}}global i8 0, align 1 + _Fract fract_zero = 0.0r; // CHECK-DAG: @fract_zero = {{.*}}global i16 0, align 2 +long _Fract long_fract_zero = 0.0lr; // CHECK-DAG: @long_fract_zero = {{.*}}global i32 0, align 4 +unsigned short _Fract u_short_fract_zero = 0.0uhr; // CHECK-DAG: @u_short_fract_zero = {{.*}}global i8 0, align 1 +unsigned _Fract u_fract_zero = 0.0ur; // CHECK-DAG: @u_fract_zero = {{.*}}global i16 0, align 2 +unsigned long _Fract u_long_fract_zero = 0.0ulr; // CHECK-DAG: @u_long_fract_zero = {{.*}}global i32 0, align 4 |
