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[libc][stdfix] Implement fixed point fxbits functions in llvm-libc (#114912)
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+909
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lines changed

‎libc/config/baremetal/arm/entrypoints.txt‎

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@@ -458,6 +458,18 @@ if(LIBC_COMPILER_HAS_FIXED_POINT)
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libc.src.stdfix.sqrtulr
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libc.src.stdfix.uhksqrtus
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libc.src.stdfix.uksqrtui
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libc.src.stdfix.hrbits
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libc.src.stdfix.uhrbits
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libc.src.stdfix.rbits
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libc.src.stdfix.urbits
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libc.src.stdfix.lrbits
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libc.src.stdfix.ulrbits
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libc.src.stdfix.hkbits
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libc.src.stdfix.uhkbits
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libc.src.stdfix.kbits
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libc.src.stdfix.ukbits
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libc.src.stdfix.lkbits
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libc.src.stdfix.ulkbits
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)
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endif()
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‎libc/config/baremetal/riscv/entrypoints.txt‎

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@@ -453,6 +453,18 @@ if(LIBC_COMPILER_HAS_FIXED_POINT)
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libc.src.stdfix.sqrtulr
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libc.src.stdfix.uhksqrtus
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libc.src.stdfix.uksqrtui
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libc.src.stdfix.hrbits
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libc.src.stdfix.uhrbits
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libc.src.stdfix.rbits
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libc.src.stdfix.urbits
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libc.src.stdfix.lrbits
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libc.src.stdfix.ulrbits
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libc.src.stdfix.hkbits
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libc.src.stdfix.uhkbits
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libc.src.stdfix.kbits
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libc.src.stdfix.ukbits
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libc.src.stdfix.lkbits
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libc.src.stdfix.ulkbits
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)
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endif()
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‎libc/config/linux/riscv/entrypoints.txt‎

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@@ -717,6 +717,18 @@ if(LIBC_COMPILER_HAS_FIXED_POINT)
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libc.src.stdfix.sqrtulr
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libc.src.stdfix.uhksqrtus
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libc.src.stdfix.uksqrtui
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libc.src.stdfix.hrbits
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libc.src.stdfix.uhrbits
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libc.src.stdfix.rbits
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libc.src.stdfix.urbits
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libc.src.stdfix.lrbits
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libc.src.stdfix.ulrbits
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libc.src.stdfix.hkbits
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libc.src.stdfix.uhkbits
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libc.src.stdfix.kbits
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libc.src.stdfix.ukbits
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libc.src.stdfix.lkbits
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libc.src.stdfix.ulkbits
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)
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endif()
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‎libc/config/linux/x86_64/entrypoints.txt‎

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@@ -828,6 +828,18 @@ if(LIBC_COMPILER_HAS_FIXED_POINT)
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libc.src.stdfix.sqrtulr
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libc.src.stdfix.uhksqrtus
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libc.src.stdfix.uksqrtui
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libc.src.stdfix.hrbits
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libc.src.stdfix.uhrbits
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libc.src.stdfix.rbits
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libc.src.stdfix.urbits
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libc.src.stdfix.lrbits
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libc.src.stdfix.ulrbits
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libc.src.stdfix.hkbits
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libc.src.stdfix.uhkbits
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libc.src.stdfix.kbits
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libc.src.stdfix.ukbits
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libc.src.stdfix.lkbits
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libc.src.stdfix.ulkbits
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)
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endif()
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‎libc/include/CMakeLists.txt‎

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@@ -178,6 +178,7 @@ add_header_macro(
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stdfix.h
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DEPENDS
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.llvm-libc-macros.stdfix_macros
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.llvm-libc-types.stdfix-types
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)
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# TODO: This should be conditional on POSIX networking being included.

‎libc/include/llvm-libc-types/CMakeLists.txt‎

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@@ -155,3 +155,4 @@ DEPENDS
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)
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add_header(locale_t HDR locale_t.h)
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add_header(struct_lconv HDR struct_lconv.h)
158+
add_header(stdfix-types HDR stdfix-types.h)

‎libc/include/llvm-libc-types/stdfix-types.h‎

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@@ -0,0 +1,25 @@
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//===-- Definition of stdfix integer types --------------------------------===//
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//
3+
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4+
// See https://llvm.org/LICENSE.txt for license information.
5+
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6+
//
7+
//===----------------------------------------------------------------------===//
8+
9+
#ifndef LLVM_LIBC_TYPES_STDFIX_TYPES_H
10+
#define LLVM_LIBC_TYPES_STDFIX_TYPES_H
11+
12+
typedef signed char int_hr_t;
13+
typedef signed short int int_r_t;
14+
typedef signed int int_lr_t;
15+
typedef signed short int_hk_t;
16+
typedef signed int int_k_t;
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typedef signed long int_lk_t;
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typedef unsigned char uint_uhr_t;
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typedef unsigned short int uint_ur_t;
20+
typedef unsigned int uint_ulr_t;
21+
typedef unsigned short int uint_uhk_t;
22+
typedef unsigned int uint_uk_t;
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typedef unsigned long uint_ulk_t;
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25+
#endif // LLVM_LIBC_TYPES_STDFIX_TYPES_H

‎libc/newhdrgen/yaml/stdfix.yaml‎

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Original file line numberDiff line numberDiff line change
@@ -1,6 +1,7 @@
11
header: stdfix.h
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macros: []
3-
types: []
3+
types:
4+
- type_name: stdfix-types
45
enums: []
56
objects: []
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functions:
@@ -62,6 +63,90 @@ functions:
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arguments:
6364
- type: accum
6465
guard: LIBC_COMPILER_HAS_FIXED_POINT
66+
- name: hrbits
67+
standards:
68+
- stdc_ext
69+
return_type: short fract
70+
arguments:
71+
- type: int_hr_t
72+
guard: LIBC_COMPILER_HAS_FIXED_POINT
73+
- name: uhrbits
74+
standards:
75+
- stdc_ext
76+
return_type: unsigned short fract
77+
arguments:
78+
- type: uint_uhr_t
79+
guard: LIBC_COMPILER_HAS_FIXED_POINT
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- name: rbits
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standards:
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- stdc_ext
83+
return_type: fract
84+
arguments:
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- type: int_r_t
86+
guard: LIBC_COMPILER_HAS_FIXED_POINT
87+
- name: urbits
88+
standards:
89+
- stdc_ext
90+
return_type: unsigned fract
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arguments:
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- type: uint_ur_t
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guard: LIBC_COMPILER_HAS_FIXED_POINT
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- name: lrbits
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standards:
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- stdc_ext
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return_type: long fract
98+
arguments:
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- type: int_lr_t
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guard: LIBC_COMPILER_HAS_FIXED_POINT
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- name: ulrbits
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standards:
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- stdc_ext
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return_type: unsigned long fract
105+
arguments:
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- type: uint_ulr_t
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guard: LIBC_COMPILER_HAS_FIXED_POINT
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- name: hkbits
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standards:
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- stdc_ext
111+
return_type: short accum
112+
arguments:
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- type: int_hk_t
114+
guard: LIBC_COMPILER_HAS_FIXED_POINT
115+
- name: uhkbits
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standards:
117+
- stdc_ext
118+
return_type: unsigned short accum
119+
arguments:
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- type: uint_uhk_t
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guard: LIBC_COMPILER_HAS_FIXED_POINT
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- name: kbits
123+
standards:
124+
- stdc_ext
125+
return_type: accum
126+
arguments:
127+
- type: int_k_t
128+
guard: LIBC_COMPILER_HAS_FIXED_POINT
129+
- name: ukbits
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standards:
131+
- stdc_ext
132+
return_type: unsigned accum
133+
arguments:
134+
- type: uint_uk_t
135+
guard: LIBC_COMPILER_HAS_FIXED_POINT
136+
- name: lkbits
137+
standards:
138+
- stdc_ext
139+
return_type: long accum
140+
arguments:
141+
- type: uint_ulr_t
142+
guard: LIBC_COMPILER_HAS_FIXED_POINT
143+
- name: ulkbits
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standards:
145+
- stdc_ext
146+
return_type: unsigned long accum
147+
arguments:
148+
- type: uint_ulk_t
149+
guard: LIBC_COMPILER_HAS_FIXED_POINT
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- name: roundhk
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standards:
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- stdc_ext

‎libc/spec/stdc_ext.td‎

Lines changed: 27 additions & 1 deletion
Original file line numberDiff line numberDiff line change
@@ -15,13 +15,26 @@ def UnsignedShortAccumType : NamedType<"unsigned short accum">;
1515
def UnsignedAccumType : NamedType<"unsigned accum">;
1616
def UnsignedLongAccumType : NamedType<"unsigned long accum">;
1717

18+
def IntHrT : NamedType <"int_hr_t">;
19+
def IntRT : NamedTypes<"int_r_t">;
20+
def IntLrT : NamedType<"int_lr_t">;
21+
def IntHkT : NamedType<"int_hk_t">;
22+
def IntKT : NamedType<"int_k_t">;
23+
def IntLkT : NamedType<"int_lk_t">;
24+
def UIntUhrT : NamedType<"uint_uhr_t">;
25+
def UIntUrT : NamedType<"uint_ur_t">;
26+
def UIntUlrT : NamedType<"uint_ulr_t">;
27+
def UIntUhkT : NamedType<"uint_uhk_t">;
28+
def UIntUkT : NamedType<"uint_uk_t">;
29+
def UIntUlkT : NamedType<"uint_ulk_t">;
30+
1831
def StdcExt : StandardSpec<"stdc_ext"> {
1932
// From ISO/IEC TR 18037:2008 standard:
2033
// https://standards.iso.org/ittf/PubliclyAvailableStandards/c051126_ISO_IEC_TR_18037_2008.zip
2134
HeaderSpec StdFix = HeaderSpec<
2235
"stdfix.h",
2336
[], // macros
24-
[], // types
37+
[IntHrT,IntRT, IntLrT, IntHkT, IntKT, IntLkT, UIntUhrT, UIntUrT, UIntUlrT, UIntUhkT, UIntUkT, UIntUlkT], // types
2538
[], // enums
2639
[ // functions
2740
GuardedFunctionSpec<"abshr", RetValSpec<ShortFractType>, [ArgSpec<ShortFractType>], "LIBC_COMPILER_HAS_FIXED_POINT">,
@@ -47,6 +60,19 @@ def StdcExt : StandardSpec<"stdc_ext"> {
4760
GuardedFunctionSpec<"rounduhk", RetValSpec<UnsignedShortAccumType>, [ArgSpec<UnsignedShortAccumType>, ArgSpec<IntType>], "LIBC_COMPILER_HAS_FIXED_POINT">,
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GuardedFunctionSpec<"rounduk", RetValSpec<UnsignedAccumType>, [ArgSpec<UnsignedAccumType>, ArgSpec<IntType>], "LIBC_COMPILER_HAS_FIXED_POINT">,
4962
GuardedFunctionSpec<"roundulk", RetValSpec<UnsignedLongAccumType>, [ArgSpec<UnsignedLongAccumType>, ArgSpec<IntType>], "LIBC_COMPILER_HAS_FIXED_POINT">,
63+
64+
GuardedFunctionSpec<"hrbits", RetValSpec<ShortFractType>, [ArgSpec<IntHrT>], "LIBC_COMPILER_HAS_FIXED_POINT">,
65+
GuardedFunctionSpec<"rbits", RetValSpec<FractType>, [ArgSpec<IntRT>], "LIBC_COMPILER_HAS_FIXED_POINT">,
66+
GuardedFunctionSpec<"lrbits", RetValSpec<LongFractType>, [ArgSpec<IntLrT>], "LIBC_COMPILER_HAS_FIXED_POINT">,
67+
GuardedFunctionSpec<"hkbits", RetValSpec<ShortAccumType>, [ArgSpec<IntHkT>], "LIBC_COMPILER_HAS_FIXED_POINT">,
68+
GuardedFunctionSpec<"kbits", RetValSpec<AccumType>, [ArgSpec<IntKT>], "LIBC_COMPILER_HAS_FIXED_POINT">,
69+
GuardedFunctionSpec<"lkbits", RetValSpec<LongAccumType>, [ArgSpec<IntLkT>], "LIBC_COMPILER_HAS_FIXED_POINT">,
70+
GuardedFunctionSpec<"uhrbits", RetValSpec<UnsignedShortFractType>, [ArgSpec<UIntUhrT>], "LIBC_COMPILER_HAS_FIXED_POINT">,
71+
GuardedFunctionSpec<"urbits", RetValSpec<UnsignedFractType>, [ArgSpec<UIntUrT>], "LIBC_COMPILER_HAS_FIXED_POINT">,
72+
GuardedFunctionSpec<"ukbits", RetValSpec<UnsignedAccumType>, [ArgSpec<UIntUkT>], "LIBC_COMPILER_HAS_FIXED_POINT">
73+
GuardedFunctionSpec<"ulrbits", RetValSpec<UnsignedLongFractType>, [ArgSpec<UIntUlrT>], "LIBC_COMPILER_HAS_FIXED_POINT">,
74+
GuardedFunctionSpec<"uhkbits", RetValSpec<UnsignedShortAccumType>, [ArgSpec<UIntUhkT>], "LIBC_COMPILER_HAS_FIXED_POINT">
75+
GuardedFunctionSpec<"ulkbits", RetValSpec<UnsignedLongAccumType>, [ArgSpec<UIntUlkT>], "LIBC_COMPILER_HAS_FIXED_POINT">
5076
]
5177
>;
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‎libc/src/__support/fixed_point/fx_bits.h‎

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@@ -12,7 +12,7 @@
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#include "include/llvm-libc-macros/stdfix-macros.h"
1313
#include "src/__support/CPP/bit.h"
1414
#include "src/__support/CPP/type_traits.h"
15-
#include "src/__support/macros/attributes.h" // LIBC_INLINE
15+
#include "src/__support/macros/attributes.h" // LIBC_INLINE
1616
#include "src/__support/macros/config.h"
1717
#include "src/__support/macros/optimization.h" // LIBC_UNLIKELY
1818
#include "src/__support/math_extras.h"

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