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8340438: RISC-V: minor improvement in base64

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Reviewed-by: fyang
This commit is contained in:
Hamlin Li 2024-09-20 09:33:31 +00:00
parent a50440fadc
commit 3ad6e31d81
1 changed files with 4 additions and 4 deletions
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8
src/hotspot/cpu/riscv/stubGenerator_riscv.cpp
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@ -5491,9 +5491,7 @@ class StubGenerator: public StubCodeGenerator {
Register stepSrcM2 = doff;
Register stepDst = isURL;
Register size = x29; // t4
Register minusOne = x30; // t5
__ mv(minusOne, -1);
__ mv(size, MaxVectorSize * 2);
__ mv(stepSrcM1, MaxVectorSize * 4);
__ slli(stepSrcM2, stepSrcM1, 1);
@ -5513,7 +5511,8 @@ class StubGenerator: public StubCodeGenerator {
__ sub(length, length, stepSrcM2);
// error check
__ bne(failedIdx, minusOne, Exit);
// valid value of failedIdx can only be -1 when < 0
__ bgez(failedIdx, Exit);
__ bge(length, stepSrcM2, ProcessM2);
@ -5533,7 +5532,8 @@ class StubGenerator: public StubCodeGenerator {
__ sub(length, length, stepSrcM1);
// error check
__ bne(failedIdx, minusOne, Exit);
// valid value of failedIdx can only be -1 when < 0
__ bgez(failedIdx, Exit);
__ BIND(ProcessScalar);
__ beqz(length, Exit);