Commit 96ae05a
deps: V8: backport 3f071e3e7e15
Original commit message:
PPC: Optimize clearing higher bits of mulhw/mulhwu
Change-Id: Ie3e14a6ef4531349e81a8ae741bc7470c7e547ca
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2349468
Reviewed-by: Junliang Yan <jyan@ca.ibm.com>
Commit-Queue: Milad Farazmand <miladfar@ca.ibm.com>
Cr-Commit-Position: refs/heads/master@{#69343}
Refs: v8/v8@3f071e3
PR-URL: #35036
Reviewed-By: Richard Lau <riclau@uk.ibm.com>
Reviewed-By: Ash Cripps <ashley.cripps@ibm.com>
Reviewed-By: Beth Griggs <Bethany.Griggs@uk.ibm.com>
Reviewed-By: Rich Trott <rtrott@gmail.com>1 parent 4d53385 commit 96ae05a
2 files changed
Lines changed: 7 additions & 5 deletions
| Original file line number | Diff line number | Diff line change | |
|---|---|---|---|
@@ -36,7 +36,7 @@ | |||
| 36 | 36 | ||
| 37 | 37 | # Reset this number to 0 on major V8 upgrades. | |
| 38 | 38 | # Increment by one for each non-official patch applied to deps/v8. | |
| 39 | - 'v8_embedder_string': '-node.13', | ||
| 39 | + 'v8_embedder_string': '-node.15', | ||
| 40 | 40 | ||
| 41 | 41 | ##### V8 defaults for Node.js ##### | |
| 42 | 42 | ||
| Original file line number | Diff line number | Diff line change | |
|---|---|---|---|
@@ -1515,12 +1515,14 @@ CodeGenerator::CodeGenResult CodeGenerator::AssembleArchInstruction( | |||
| 1515 | 1515 | } | |
| 1516 | 1516 | break; | |
| 1517 | 1517 | case kPPC_MulHigh32: | |
| 1518 | - __ mulhw(i.OutputRegister(), i.InputRegister(0), i.InputRegister(1), | ||
| 1519 | - i.OutputRCBit()); | ||
| 1518 | + __ mulhw(r0, i.InputRegister(0), i.InputRegister(1), i.OutputRCBit()); | ||
| 1519 | + // High 32 bits are undefined and need to be cleared. | ||
| 1520 | + __ clrldi(i.OutputRegister(), r0, Operand(32)); | ||
| 1520 | 1521 | break; | |
| 1521 | 1522 | case kPPC_MulHighU32: | |
| 1522 | - __ mulhwu(i.OutputRegister(), i.InputRegister(0), i.InputRegister(1), | ||
| 1523 | - i.OutputRCBit()); | ||
| 1523 | + __ mulhwu(r0, i.InputRegister(0), i.InputRegister(1), i.OutputRCBit()); | ||
| 1524 | + // High 32 bits are undefined and need to be cleared. | ||
| 1525 | + __ clrldi(i.OutputRegister(), r0, Operand(32)); | ||
| 1524 | 1526 | break; | |
| 1525 | 1527 | case kPPC_MulDouble: | |
| 1526 | 1528 | ASSEMBLE_FLOAT_BINOP_RC(fmul, MiscField::decode(instr->opcode())); | |
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