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Commit 8dce62c

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richardlaurichardlau
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deps: V8: cherry-pick 5fe919f78321
Original commit message: PPC: clear VXCVI before doing a conversion This bit may not get cleared automatically and could show results from older executed instructions. Change-Id: I5976f9a6c5bf87b1a63ef0f35493b222729e20f6 Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3812037 Reviewed-by: Junliang Yan <junyan@redhat.com> Commit-Queue: Milad Farazmand <mfarazma@redhat.com> Cr-Commit-Position: refs/heads/main@{#82237} Refs: v8/v8@5fe919f PR-URL: #45587 Reviewed-By: Michael Dawson <midawson@redhat.com> Reviewed-By: Jiawen Geng <technicalcute@gmail.com>
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‎common.gypi‎

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+1-1Lines changed: 1 addition & 1 deletion
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@@ -36,7 +36,7 @@
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# Reset this number to 0 on major V8 upgrades.
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# Increment by one for each non-official patch applied to deps/v8.
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'v8_embedder_string': '-node.21',
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'v8_embedder_string': '-node.22',
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##### V8 defaults for Node.js #####
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‎deps/v8/src/wasm/baseline/ppc/liftoff-assembler-ppc.h‎

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+4Lines changed: 4 additions & 0 deletions
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@@ -1455,6 +1455,7 @@ bool LiftoffAssembler::emit_type_conversion(WasmOpcode opcode,
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fcmpu(src.fp(), kScratchDoubleReg);
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bunordered(trap);
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mtfsb0(VXCVI); // clear FPSCR:VXCVI bit
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fctiwz(kScratchDoubleReg, src.fp());
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MovDoubleLowToInt(dst.gp(), kScratchDoubleReg);
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mcrfs(cr7, VXCVI);
@@ -1463,6 +1464,7 @@ bool LiftoffAssembler::emit_type_conversion(WasmOpcode opcode,
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}
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case kExprI32UConvertF64:
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case kExprI32UConvertF32: {
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mtfsb0(VXCVI); // clear FPSCR:VXCVI bit
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ConvertDoubleToUnsignedInt64(src.fp(), r0, kScratchDoubleReg,
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kRoundToZero);
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mcrfs(cr7, VXCVI); // extract FPSCR field containing VXCVI into cr7
@@ -1478,6 +1480,7 @@ bool LiftoffAssembler::emit_type_conversion(WasmOpcode opcode,
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fcmpu(src.fp(), kScratchDoubleReg);
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bunordered(trap);
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mtfsb0(VXCVI); // clear FPSCR:VXCVI bit
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fctidz(kScratchDoubleReg, src.fp());
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MovDoubleToInt64(dst.gp(), kScratchDoubleReg);
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mcrfs(cr7, VXCVI);
@@ -1490,6 +1493,7 @@ bool LiftoffAssembler::emit_type_conversion(WasmOpcode opcode,
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fcmpu(src.fp(), kScratchDoubleReg);
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bunordered(trap);
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mtfsb0(VXCVI); // clear FPSCR:VXCVI bit
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fctiduz(kScratchDoubleReg, src.fp());
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MovDoubleToInt64(dst.gp(), kScratchDoubleReg);
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mcrfs(cr7, VXCVI);

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