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https://github.com/c64scene-ar/llvm-6502.git
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65 lines
1.6 KiB
LLVM
65 lines
1.6 KiB
LLVM
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; Test high-part i32->i64 multiplications.
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;
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; RUN: llc < %s -mtriple=s390x-linux-gnu | FileCheck %s
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; We don't provide *MUL_LOHI or MULH* for the patterns in this file,
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; but they should at least still work.
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; Check zero-extended multiplication in which only the high part is used.
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define i32 @f1(i32 %a, i32 %b) {
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; CHECK: f1:
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; CHECK: msgr
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; CHECK: br %r14
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%ax = zext i32 %a to i64
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%bx = zext i32 %b to i64
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%mulx = mul i64 %ax, %bx
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%highx = lshr i64 %mulx, 32
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%high = trunc i64 %highx to i32
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ret i32 %high
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}
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; Check sign-extended multiplication in which only the high part is used.
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define i32 @f2(i32 %a, i32 %b) {
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; CHECK: f2:
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; CHECK: msgfr
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; CHECK: br %r14
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%ax = sext i32 %a to i64
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%bx = sext i32 %b to i64
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%mulx = mul i64 %ax, %bx
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%highx = lshr i64 %mulx, 32
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%high = trunc i64 %highx to i32
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ret i32 %high
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}
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; Check zero-extended multiplication in which the result is split into
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; high and low halves.
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define i32 @f3(i32 %a, i32 %b) {
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; CHECK: f3:
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; CHECK: msgr
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; CHECK: br %r14
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%ax = zext i32 %a to i64
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%bx = zext i32 %b to i64
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%mulx = mul i64 %ax, %bx
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%highx = lshr i64 %mulx, 32
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%high = trunc i64 %highx to i32
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%low = trunc i64 %mulx to i32
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%or = or i32 %high, %low
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ret i32 %or
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}
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; Check sign-extended multiplication in which the result is split into
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; high and low halves.
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define i32 @f4(i32 %a, i32 %b) {
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; CHECK: f4:
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; CHECK: msgfr
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; CHECK: br %r14
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%ax = sext i32 %a to i64
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%bx = sext i32 %b to i64
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%mulx = mul i64 %ax, %bx
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%highx = lshr i64 %mulx, 32
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%high = trunc i64 %highx to i32
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%low = trunc i64 %mulx to i32
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%or = or i32 %high, %low
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ret i32 %or
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}
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