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-rw-r--r--js/src/jit/mips-shared/MacroAssembler-mips-shared.cpp183
-rw-r--r--js/src/jit/mips-shared/MacroAssembler-mips-shared.h1
2 files changed, 147 insertions, 37 deletions
diff --git a/js/src/jit/mips-shared/MacroAssembler-mips-shared.cpp b/js/src/jit/mips-shared/MacroAssembler-mips-shared.cpp
index 811fb01f11..3665f30722 100644
--- a/js/src/jit/mips-shared/MacroAssembler-mips-shared.cpp
+++ b/js/src/jit/mips-shared/MacroAssembler-mips-shared.cpp
@@ -740,9 +740,17 @@ MacroAssemblerMIPSShared::ma_b(Register lhs, Imm32 imm, Label* label, Condition
else
branchWithCode(getBranchCode(lhs, c), label, jumpKind);
} else {
- MOZ_ASSERT(lhs != ScratchRegister);
- ma_li(ScratchRegister, imm);
- ma_b(lhs, ScratchRegister, label, c, jumpKind);
+ switch (c) {
+ case Equal:
+ case NotEqual:
+ MOZ_ASSERT(lhs != ScratchRegister);
+ ma_li(ScratchRegister, imm);
+ ma_b(lhs, ScratchRegister, label, c, jumpKind);
+ break;
+ default:
+ Condition cond = ma_cmp(ScratchRegister, lhs, imm, c);
+ asMasm().branchWithCode(getBranchCode(ScratchRegister, cond), label, jumpKind);
+ }
}
}
@@ -862,20 +870,59 @@ MacroAssemblerMIPSShared::ma_cmp(Register scratch, Register lhs, Register rhs, C
// beq at,$zero,offs
as_slt(scratch, rhs, lhs);
return Equal;
- case Equal :
- case NotEqual:
- case Zero:
- case NonZero:
- case Always:
- case Signed:
- case NotSigned:
- MOZ_CRASH("There is a better way to compare for equality.");
- break;
- case Overflow:
- MOZ_CRASH("Overflow condition not supported for MIPS.");
- break;
default:
- MOZ_CRASH("Invalid condition for branch.");
+ MOZ_CRASH("Invalid condition.");
+ }
+ return Always;
+}
+
+Assembler::Condition
+MacroAssemblerMIPSShared::ma_cmp(Register scratch, Register lhs, Imm32 imm, Condition c)
+{
+ switch (c) {
+ case Above:
+ case BelowOrEqual:
+ if (Imm16::IsInSignedRange(imm.value + 1) && imm.value != -1) {
+ // lhs <= rhs via lhs < rhs + 1 if rhs + 1 does not overflow
+ as_sltiu(scratch, lhs, imm.value + 1);
+
+ return (c == BelowOrEqual ? NotEqual : Equal);
+ } else {
+ ma_li(scratch, imm);
+ as_sltu(scratch, scratch, lhs);
+ return (c == BelowOrEqual ? Equal : NotEqual);
+ }
+ case AboveOrEqual:
+ case Below:
+ if (Imm16::IsInSignedRange(imm.value)) {
+ as_sltiu(scratch, lhs, imm.value);
+ } else {
+ ma_li(scratch, imm);
+ as_sltu(scratch, lhs, scratch);
+ }
+ return (c == AboveOrEqual ? Equal : NotEqual);
+ case GreaterThan:
+ case LessThanOrEqual:
+ if (Imm16::IsInSignedRange(imm.value + 1)) {
+ // lhs <= rhs via lhs < rhs + 1.
+ as_slti(scratch, lhs, imm.value + 1);
+ return (c == LessThanOrEqual ? NotEqual : Equal);
+ } else {
+ ma_li(scratch, imm);
+ as_slt(scratch, scratch, lhs);
+ return (c == LessThanOrEqual ? Equal : NotEqual);
+ }
+ case GreaterThanOrEqual:
+ case LessThan:
+ if (Imm16::IsInSignedRange(imm.value)) {
+ as_slti(scratch, lhs, imm.value);
+ } else {
+ ma_li(scratch, imm);
+ as_slt(scratch, lhs, scratch);
+ }
+ return (c == GreaterThanOrEqual ? Equal : NotEqual);
+ default:
+ MOZ_CRASH("Invalid condition.");
}
return Always;
}
@@ -947,22 +994,21 @@ MacroAssemblerMIPSShared::ma_cmp_set(Register rd, Register rs, Register rt, Cond
case Zero:
MOZ_ASSERT(rs == rt);
// seq d,s,$zero =>
- // xor d,s,$zero
- // sltiu d,d,1
- as_xor(rd, rs, zero);
- as_sltiu(rd, rd, 1);
+ // sltiu d,s,1
+ as_sltiu(rd, rs, 1);
break;
case NonZero:
+ MOZ_ASSERT(rs == rt);
// sne d,s,$zero =>
- // xor d,s,$zero
- // sltu d,$zero,d
- as_xor(rd, rs, zero);
- as_sltu(rd, zero, rd);
+ // sltu d,$zero,s
+ as_sltu(rd, zero, rs);
break;
case Signed:
+ MOZ_ASSERT(rs == rt);
as_slt(rd, rs, zero);
break;
case NotSigned:
+ MOZ_ASSERT(rs == rt);
// sge d,s,$zero =>
// slt d,s,$zero
// xori d,d,1
@@ -970,7 +1016,7 @@ MacroAssemblerMIPSShared::ma_cmp_set(Register rd, Register rs, Register rt, Cond
as_xori(rd, rd, 1);
break;
default:
- MOZ_CRASH("Invalid condition for ma_cmp_set.");
+ MOZ_CRASH("Invalid condition.");
}
}
@@ -1067,39 +1113,102 @@ void
MacroAssemblerMIPSShared::ma_cmp_set_double(Register dest, FloatRegister lhs, FloatRegister rhs,
DoubleCondition c)
{
- ma_li(dest, Imm32(0));
- ma_li(ScratchRegister, Imm32(1));
-
FloatTestKind moveCondition;
compareFloatingPoint(DoubleFloat, lhs, rhs, c, &moveCondition);
+ ma_li(dest, Imm32(1));
+
if (moveCondition == TestForTrue)
- as_movt(dest, ScratchRegister);
+ as_movf(dest, zero);
else
- as_movf(dest, ScratchRegister);
+ as_movt(dest, zero);
}
void
MacroAssemblerMIPSShared::ma_cmp_set_float32(Register dest, FloatRegister lhs, FloatRegister rhs,
DoubleCondition c)
{
- ma_li(dest, Imm32(0));
- ma_li(ScratchRegister, Imm32(1));
-
FloatTestKind moveCondition;
compareFloatingPoint(SingleFloat, lhs, rhs, c, &moveCondition);
+ ma_li(dest, Imm32(1));
+
if (moveCondition == TestForTrue)
- as_movt(dest, ScratchRegister);
+ as_movf(dest, zero);
else
- as_movf(dest, ScratchRegister);
+ as_movt(dest, zero);
}
void
MacroAssemblerMIPSShared::ma_cmp_set(Register rd, Register rs, Imm32 imm, Condition c)
{
- ma_li(ScratchRegister, imm);
- ma_cmp_set(rd, rs, ScratchRegister, c);
+ if (imm.value == 0) {
+ switch (c) {
+ case Equal :
+ case BelowOrEqual:
+ as_sltiu(rd, rs, 1);
+ break;
+ case NotEqual:
+ case Above:
+ as_sltu(rd, zero, rs);
+ break;
+ case AboveOrEqual:
+ case Below:
+ as_ori(rd, zero, c == AboveOrEqual ? 1: 0);
+ break;
+ case GreaterThan:
+ case LessThanOrEqual:
+ as_slt(rd, zero, rs);
+ if (c == LessThanOrEqual)
+ as_xori(rd, rd, 1);
+ break;
+ case LessThan:
+ case GreaterThanOrEqual:
+ as_slt(rd, rs, zero);
+ if (c == GreaterThanOrEqual)
+ as_xori(rd, rd, 1);
+ break;
+ case Zero:
+ as_sltiu(rd, rs, 1);
+ break;
+ case NonZero:
+ as_sltu(rd, zero, rs);
+ break;
+ case Signed:
+ as_slt(rd, rs, zero);
+ break;
+ case NotSigned:
+ as_slt(rd, rs, zero);
+ as_xori(rd, rd, 1);
+ break;
+ default:
+ MOZ_CRASH("Invalid condition.");
+ }
+ return;
+ }
+
+ switch (c) {
+ case Equal:
+ case NotEqual:
+ MOZ_ASSERT(rs != ScratchRegister);
+ ma_xor(rd, rs, imm);
+ if (c == Equal)
+ as_sltiu(rd, rd, 1);
+ else
+ as_sltu(rd, zero, rd);
+ break;
+ case Zero:
+ case NonZero:
+ case Signed:
+ case NotSigned:
+ MOZ_CRASH("Invalid condition.");
+ default:
+ Condition cond = ma_cmp(rd, rs, imm, c);
+ MOZ_ASSERT(cond == Equal || cond == NotEqual);
+
+ if(cond == Equal)
+ as_xori(rd, rd, 1);
+ }
}
// fp instructions
diff --git a/js/src/jit/mips-shared/MacroAssembler-mips-shared.h b/js/src/jit/mips-shared/MacroAssembler-mips-shared.h
index 3046109919..cd75b2e371 100644
--- a/js/src/jit/mips-shared/MacroAssembler-mips-shared.h
+++ b/js/src/jit/mips-shared/MacroAssembler-mips-shared.h
@@ -54,6 +54,7 @@ class MacroAssemblerMIPSShared : public Assembler
const MacroAssembler& asMasm() const;
Condition ma_cmp(Register rd, Register lhs, Register rhs, Condition c);
+ Condition ma_cmp(Register rd, Register lhs, Imm32 imm, Condition c);
void compareFloatingPoint(FloatFormat fmt, FloatRegister lhs, FloatRegister rhs,
DoubleCondition c, FloatTestKind* testKind,
generated by cgit v1.2.3 (git 2.26.2) at 2024-11-16 03:53:20 +0000