// If needed, restore wanted bits of FPSCR.
Label fpscr_done;
vmrs(scratch);
+ if (emit_debug_code()) {
+ tst(scratch, Operand(kVFPRoundingModeMask));
+ Assert(eq, kDefaultRoundingModeNotSet);
+ }
tst(scratch, Operand(kVFPDefaultNaNModeControlBit));
b(ne, &fpscr_done);
orr(scratch, scratch, Operand(kVFPDefaultNaNModeControlBit));
void MacroAssembler::ClampDoubleToUint8(Register result_reg,
DwVfpRegister input_reg,
LowDwVfpRegister double_scratch) {
- Label above_zero;
Label done;
- Label in_bounds;
-
- VFPCompareAndSetFlags(input_reg, 0.0);
- b(gt, &above_zero);
-
- // Double value is less than zero, NaN or Inf, return 0.
- mov(result_reg, Operand::Zero());
- b(al, &done);
- // Double value is >= 255, return 255.
- bind(&above_zero);
+ // Handle inputs >= 255 (including +infinity).
Vmov(double_scratch, 255.0, result_reg);
- VFPCompareAndSetFlags(input_reg, double_scratch);
- b(le, &in_bounds);
mov(result_reg, Operand(255));
- b(al, &done);
-
- // In 0-255 range, round and truncate.
- bind(&in_bounds);
- // Save FPSCR.
- vmrs(ip);
- // Set rounding mode to round to the nearest integer by clearing bits[23:22].
- bic(result_reg, ip, Operand(kVFPRoundingModeMask));
- vmsr(result_reg);
- vcvt_s32_f64(double_scratch.low(), input_reg, kFPSCRRounding);
+ VFPCompareAndSetFlags(input_reg, double_scratch);
+ b(ge, &done);
+
+ // For inputs < 255 (including negative) vcvt_u32_f64 with round-to-nearest
+ // rounding mode will provide the correct result.
+ vcvt_u32_f64(double_scratch.low(), input_reg, kFPSCRRounding);
vmov(result_reg, double_scratch.low());
- // Restore FPSCR.
- vmsr(ip);
+
bind(&done);
}
V(kDeclarationInCatchContext, "Declaration in catch context") \
V(kDeclarationInWithContext, "Declaration in with context") \
V(kDefaultNaNModeNotSet, "Default NaN mode not set") \
+ V(kDefaultRoundingModeNotSet, "Default rounding mode not set") \
V(kDeleteWithGlobalVariable, "Delete with global variable") \
V(kDeleteWithNonGlobalVariable, "Delete with non-global variable") \
V(kDestinationOfCopyNotAligned, "Destination of copy not aligned") \