948abf1bf5
Support the following BCD format conversion builtins for PowerPC.
- `__builtin_bcdcopysign` – Conversion that returns the decimal value of
the first parameter combined with the sign code of the second parameter.
`
- `__builtin_bcdsetsign` – Conversion that sets the sign code of the
input parameter in packed decimal format.
> Note: This built-in function is valid only when all following
conditions are met:
> -qarch is set to utilize POWER9 technology.
> The bcd.h file is included.
## Prototypes
```c
vector unsigned char __builtin_bcdcopysign(vector unsigned char, vector unsigned char);
vector unsigned char __builtin_bcdsetsign(vector unsigned char, unsigned char);
```
## Usage Details
`__builtin_bcdsetsign`: Returns the packed decimal value of the first
parameter combined with the sign code.
The sign code is set according to the following rules:
- If the packed decimal value of the first parameter is positive, the
following rules apply:
- If the second parameter is 0, the sign code is set to 0xC.
- If the second parameter is 1, the sign code is set to 0xF.
- If the packed decimal value of the first parameter is negative, the
sign code is set to 0xD.
> notes:
> The second parameter can only be 0 or 1.
> You can determine whether a packed decimal value is positive or
negative as follows:
> - Packed decimal values with sign codes **0xA, 0xC, 0xE, or 0xF** are
interpreted as positive.
> - Packed decimal values with sign codes **0xB or 0xD** are interpreted
as negative.
---------
Co-authored-by: Aditi-Medhane <aditi.medhane@ibm.com>
41 lines
1.5 KiB
LLVM
41 lines
1.5 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py UTC_ARGS: --version 5
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; RUN: llc -verify-machineinstrs -mtriple=powerpc64le-unknown-unknown -mcpu=pwr9 \
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; RUN: --ppc-asm-full-reg-names < %s | FileCheck %s
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; RUN: llc -verify-machineinstrs -mtriple=powerpc64-unknown-unknown -mcpu=pwr9 \
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; RUN: --ppc-asm-full-reg-names < %s | FileCheck %s
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; RUN: llc -verify-machineinstrs -mcpu=pwr9 -mtriple=powerpc64-ibm-aix-xcoff \
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; RUN: -ppc-asm-full-reg-names < %s | FileCheck %s
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define dso_local <16 x i8> @test_bcdcopysign(<16 x i8> noundef %a, <16 x i8> noundef %b) {
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; CHECK-LABEL: test_bcdcopysign:
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; CHECK: # %bb.0: # %entry
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; CHECK-NEXT: bcdcpsgn. v2, v2, v3
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; CHECK-NEXT: blr
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entry:
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%0 = tail call <16 x i8> @llvm.ppc.bcdcopysign(<16 x i8> %a, <16 x i8> %b)
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ret <16 x i8> %0
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}
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define dso_local <16 x i8> @test_bcdsetsign_imm0(<16 x i8> noundef %a) {
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; CHECK-LABEL: test_bcdsetsign_imm0:
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; CHECK: # %bb.0: # %entry
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; CHECK-NEXT: bcdsetsgn. v2, v2, 0
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; CHECK-NEXT: blr
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entry:
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%0 = tail call <16 x i8> @llvm.ppc.bcdsetsign(<16 x i8> %a, i32 0)
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ret <16 x i8> %0
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}
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define dso_local <16 x i8> @test_bcdsetsign_imm1(<16 x i8> noundef %a) {
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; CHECK-LABEL: test_bcdsetsign_imm1:
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; CHECK: # %bb.0: # %entry
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; CHECK-NEXT: bcdsetsgn. v2, v2, 1
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; CHECK-NEXT: blr
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entry:
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%0 = tail call <16 x i8> @llvm.ppc.bcdsetsign(<16 x i8> %a, i32 1)
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ret <16 x i8> %0
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}
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declare <16 x i8> @llvm.ppc.bcdcopysign(<16 x i8>, <16 x i8>)
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declare <16 x i8> @llvm.ppc.bcdsetsign(<16 x i8>, i32)
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